diff --git a/Accountcomm.java b/Accountcomm.java
new file mode 100644
index 0000000000000000000000000000000000000000..7c4c72010898b921fbb2ffa4aebb2d18e039273b
--- /dev/null
+++ b/Accountcomm.java
@@ -0,0 +1,230 @@
+package surpermarket;
+
+import java.awt.EventQueue;
+
+import javax.swing.JFrame;
+import javax.swing.JLabel;
+import java.awt.Font;
+import java.awt.TextArea;
+
+import javax.swing.JTextField;
+
+
+
+import javax.swing.JButton;
+import javax.swing.JTextArea;
+import java.awt.event.ActionListener;
+import java.awt.geom.Area;
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.awt.event.ActionEvent;
+import surpermarket.QueryAccount;
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.Statement;
+import java.sql.ResultSet;
+import javax.swing.JOptionPane;
+
+public class Accountcomm {
+	
+	private JFrame frame;
+	private JTextField T_account;
+	private JTextField T_password;
+	private JTextField T_position;
+
+	/**
+	 * Launch the application.
+	 */
+	public static void main(String[] args) {
+		EventQueue.invokeLater(new Runnable() {
+			public void run() {
+				try {
+					Accountcomm window = new Accountcomm();
+					window.frame.setVisible(true);
+				} catch (Exception e) {
+					e.printStackTrace();
+				}
+			}
+		});
+	}
+
+	/**
+	 * Create the application.
+	 */
+	public Accountcomm() {
+		initialize();
+	}
+
+	/**
+	 * Initialize the contents of the frame.
+	 */
+	private void initialize() {
+		frame = new JFrame();
+		frame.setTitle("\u767B\u5F55\u4FE1\u606F");
+		frame.getContentPane().setLayout(null);
+		
+		
+		JLabel lblNewLabel = new JLabel("\u8D26\u53F7");
+		lblNewLabel.setBounds(59, 82, 70, 39);
+		lblNewLabel.setFont(new Font("宋体", Font.PLAIN, 18));
+		frame.getContentPane().add(lblNewLabel);
+		
+		JLabel lblNewLabel_1 = new JLabel("\u5BC6\u7801");
+		lblNewLabel_1.setBounds(59, 164, 70, 39);
+		lblNewLabel_1.setFont(new Font("宋体", Font.PLAIN, 18));
+		frame.getContentPane().add(lblNewLabel_1);
+		
+		JButton B_add = new JButton("\u589E\u52A0");
+		B_add.addActionListener(new ActionListener() {
+			public void actionPerformed(ActionEvent e) {
+				
+				try {
+					surpermarket.InsertAccount insert=new InsertAccount(T_account.getText(), T_password.getText(),T_position.getText());
+				} catch (Exception e1) {
+					// TODO 自动生成的 catch 块
+					e1.printStackTrace();
+				}
+			}
+		});
+		B_add.setBounds(10, 308, 97, 39);
+		B_add.setFont(new Font("宋体", Font.PLAIN, 15));
+		frame.getContentPane().add(B_add);
+		
+		JButton B_question = new JButton("\u67E5\u8BE2");
+		JTextArea textArea = new JTextArea();                      //新建显示内容窗口TextArea
+		textArea.setBounds(519, 142, 371, 304);    
+		
+		textArea.setEditable(false);
+		textArea.setVisible(true);
+
+		frame.getContentPane().add(textArea);
+		B_question.addActionListener(new ActionListener() {
+			public void actionPerformed(ActionEvent e) {                    //查询按钮的响应
+		
+				//与前端对接  显示查询内容
+////			
+				
+			String account=null;
+			String password=null;
+			String position=null;
+			if(T_account.getText().length()!=0) account=T_account.getText();
+			if(T_password.getText().length()!=0) password=T_password.getText();
+			if(T_position.getText().length()!=0)  position=T_position.getText();
+			try {
+				
+				QueryAccount Q= new QueryAccount(account,password,position);    //新建对象
+				 String[] strings=Q.getstr();
+				 textArea.setText("");                                   //先设置显示面板为空
+				 int i=0;
+				 while(strings[i*3].length()!=0) {
+				 textArea.append(strings[i*3+0]+"  "+strings[i*3+1]+"  "+strings[i*3+2]+"          ");    
+				 textArea.append("\n");
+				 i++;
+				 }
+				 //在textArea显示出其中的一个内容
+//				 a.setText(strings[0]+"  "+strings[1]+"  "+strings[2]);
+					
+				} catch (Exception e1) {
+				// TODO 自动生成的 catch 块
+					e1.printStackTrace();
+				}
+//			   textArea.append("1111111111111111");                           //测试是否是显示出了问题
+//			
+			
+					
+					
+				
+				}
+			
+			
+//			
+//				
+			
+		});
+		B_question.setBounds(117, 308, 97, 39);
+		B_question.setFont(new Font("宋体", Font.PLAIN, 15));
+		frame.getContentPane().add(B_question);
+		
+		JButton B_update = new JButton("\u4FEE\u6539");
+		B_update.addActionListener(new ActionListener() {
+			public void actionPerformed(ActionEvent e) {
+				try {
+					surpermarket.UpdateAccount update=new surpermarket.UpdateAccount(T_account.getText(),T_password.getText(),T_position.getText());  //调用后台Update类  
+				} catch (Exception e1) {
+					// TODO 自动生成的 catch 块
+					e1.printStackTrace();
+				}
+				
+			}
+		});
+		B_update.setBounds(239, 308, 97, 39);
+		B_update.setFont(new Font("宋体", Font.PLAIN, 15));
+		frame.getContentPane().add(B_update);
+		
+		JButton B_delete = new JButton("\u5220\u9664");
+		B_delete.addActionListener(new ActionListener() {
+			public void actionPerformed(ActionEvent e) {
+				try {
+					surpermarket.DeleteAccount delete=new surpermarket.DeleteAccount(T_account.getText());                        //调用后台DELETE类
+				} catch (Exception e1) {
+					// TODO 自动生成的 catch 块
+					e1.printStackTrace();
+				}
+			}
+		});
+		B_delete.setBounds(10, 370, 97, 39);
+		B_delete.setFont(new Font("宋体", Font.PLAIN, 15));
+		frame.getContentPane().add(B_delete);
+		
+		JButton B_questionall = new JButton("\u67E5\u8BE2\u5168\u4F53");
+		B_questionall.addActionListener(new ActionListener() {
+			public void actionPerformed(ActionEvent e) {
+				try {
+					surpermarket.QueryALLAccount qa=new surpermarket.QueryALLAccount();                        //调用后台DELETE类
+					String[] strings=qa.getstr();
+					textArea.setText("账号           密码               职位             \n");                                   //先设置显示面板为空
+					 int i=0;
+					 while(strings[i*3].length()!=0) {
+					 textArea.append(strings[i*3+0]+"      "+strings[i*3+1]+"     "+strings[i*3+2]+"       ");    
+					 textArea.append("\n");
+					 i++;
+					 }
+				} catch (Exception e1) {
+					// TODO 自动生成的 catch 块
+					e1.printStackTrace();
+				}
+				
+			}
+		});
+		B_questionall.setBounds(117, 370, 145, 76);
+		B_questionall.setFont(new Font("宋体", Font.PLAIN, 15));
+		frame.getContentPane().add(B_questionall);
+		
+		JLabel lblNewLabel_1_1 = new JLabel("\u6743\u9650");
+		lblNewLabel_1_1.setBounds(59, 238, 70, 39);
+		lblNewLabel_1_1.setFont(new Font("宋体", Font.PLAIN, 18));
+		frame.getContentPane().add(lblNewLabel_1_1);
+		
+		T_account = new JTextField();
+		T_account.setBounds(158, 71, 215, 37);
+		T_account.setFont(new Font("宋体", Font.PLAIN, 16));
+		T_account.setColumns(10);
+		frame.getContentPane().add(T_account);
+		
+		T_password = new JTextField();
+		T_password.setBounds(148, 164, 215, 37);
+		T_password.setFont(new Font("宋体", Font.PLAIN, 16));
+		T_password.setColumns(10);
+		frame.getContentPane().add(T_password);
+		
+		T_position = new JTextField();
+		T_position.setBounds(148, 238, 215, 37);
+		T_position.setFont(new Font("宋体", Font.PLAIN, 16));
+		T_position.setColumns(10);
+		frame.getContentPane().add(T_position);
+		
+		
+		
+		
+	}
+}
diff --git a/LoginListener.java b/LoginListener.java
index 4cb48355c9c497136d83ac25fd4582ca9025cdfb..bcb96142c9609c8495b555fa9b355ef874df05b6 100644
--- a/LoginListener.java
+++ b/LoginListener.java
@@ -1,9 +1,10 @@
-
+package surpermarket;
 import java.awt.*;
 import java.sql.*;
 import javax.swing.ImageIcon;
 import javax.swing.JFrame;
 import javax.swing.JLabel;
+import javax.swing.JOptionPane;
 import javax.swing.JTextField;
 import javax.swing.JPasswordField;
 import javax.swing.JButton;
@@ -13,10 +14,9 @@ import java.sql.DriverManager;
 import java.sql.ResultSet;
 import java.sql.Statement;
 import static java.lang.Class.forName;
-import com.mysql.jdbc.Driver;
+import surpermarket.*;
 public class LoginListener implements ActionListener {
 
-    private int flag=0;
     private JTextField user;
     private JPasswordField password;
     private JFrame login;
@@ -24,50 +24,54 @@ public class LoginListener implements ActionListener {
     public LoginListener(JFrame login, JTextField user, JPasswordField password) {
         this.login = login;
         this.user = user;
-        this.password = password;//灏嗗�间紶閫掔粰Listener
+        this.password = password;//将值传递给Listener
     }
 
     public void actionPerformed(ActionEvent e) {
-        String url = "jdbc:mysql://localhost:3306/user?serverTimezone=UTC";
+        String url = "jdbc:mysql://localhost:3306/supermarket?&useSSL=false&allowPublicKeyRetrieval=true&serverTimezone=UTC";
         String USER = "root";
         String PASSWORD = "00000000";
+        int flag=0;
         try {
-            Class.forName("com.mysql.cj.jdbc.Driver");   //鍔犺浇椹卞姩
-            System.out.println("鏁版嵁搴撻┍鍔ㄥ姞杞芥垚鍔�");
-            Connection conn = DriverManager.getConnection(url,USER,PASSWORD);   //杈撳叆瀵嗙爜鍜寀rl涓庢暟鎹簱寤虹珛杩炴帴
-            System.out.println("鏁版嵁搴撹繛鎺ユ垚鍔�");
+            Class.forName("com.mysql.jdbc.Driver");
+            System.out.println("数据库驱动加载成功");
+            Connection conn = DriverManager.getConnection(url, USER, PASSWORD);
+            System.out.println("数据库连接成功");
             Statement statement = conn.createStatement();
-            ResultSet rs = statement.executeQuery("select * from login");  //sql璇█鎵惧埌login琛�  鐢╮s鎸囧悜瀹�
-            while (rs.next()) {                                                //rs.next()鍙互浣縭s鎸囧悜涓嬩竴琛�
-                if (user.getText().equals(rs.getString("username")) && password.getText().equals(rs.getString("password"))) {
-                    JFrame new1 = new JFrame();
-                    new1.setSize(340, 500);
-                    new1.setDefaultCloseOperation(3);
-                    new1.setLocationRelativeTo(null);
-                    new1.setVisible(true);
-                    login.dispose();                                            //濡傛灉鐢ㄦ埛鍚嶅瘑鐮佸尮閰嶆垚鍔燂紝灏辫繍琛屼笅涓�涓獥鍙ｇ殑浠ｇ爜
+            ResultSet rs = statement.executeQuery("select * from account");
+           
+            
+            while (rs.next()){
+            	
+                if (user.getText().equals(rs.getString("Account")) && password.getText().equals(rs.getString("Password"))) {
+                	if("经理".equals(rs.getString("Position"))) {                    //如果身份是经理则打开管理员界面
+                		try {
+        					MainW2 window1 = new MainW2();
+        					
+        				} catch (Exception f) {
+        					f.printStackTrace();
+        				}
+                	}
+                	else {
+                		try {                                                     //否则打开售货员界面
+        					MianW1 window2 = new MianW1();
+        					
+        				} catch (Exception b) {
+        					b.printStackTrace();
+        				}
+                	}
+                		
+                    
+                    login.dispose();
                     flag=1;
                     break;
-                }
-
-            }
-            if(flag==0){
-                JFrame new2 = new JFrame();
-                new2.setSize(200, 200);
-                new2.setDefaultCloseOperation(3);
-                new2.setLocationRelativeTo(null);
-                new2.setVisible(true);
-
-                JLabel labIcon=new JLabel("鐢ㄦ埛鍚嶆垨瀵嗙爜閿欒");
-                Font font= new Font("瀹嬩綋",Font.PLAIN,15);
-                labIcon.setFont(font);//璁剧疆瀛椾綋
-                Dimension dim=new Dimension(150,150);
-                labIcon.setPreferredSize(dim);
-                labIcon.setHorizontalAlignment(JLabel.CENTER);//璁剧疆瀛椾綋灞呬腑
-                new2.add(labIcon);
-
+                } 
+                	
 
             }
+            
+            if(flag==0)
+            	JOptionPane.showMessageDialog(null," 账号或者密码错误");
         }catch(SQLException se){
             se.printStackTrace();
         }catch(Exception w){
diff --git a/MainW1.java b/MainW1.java
new file mode 100644
index 0000000000000000000000000000000000000000..57eae380492f25068719ce24b8af70ac02d19b0c
--- /dev/null
+++ b/MainW1.java
@@ -0,0 +1,89 @@
+package surpermarket;
+
+import java.awt.EventQueue;
+
+import javax.swing.JFrame;
+import javax.swing.JLabel;
+import java.awt.Font;
+import javax.swing.JButton;
+import javax.swing.JTextField;
+
+public class MianW1 {
+
+	private JFrame frame;
+	private JTextField textField;
+	private JTextField textField_1;
+
+	/**
+	 * Launch the application.
+	 */
+	public static void main(String[] args) {
+		EventQueue.invokeLater(new Runnable() {
+			public void run() {
+				try {
+					MianW1 window = new MianW1();
+					window.frame.setVisible(true);
+				} catch (Exception e) {
+					e.printStackTrace();
+				}
+			}
+		});
+	}
+
+	/**
+	 * Create the application.
+	 */
+	public MianW1() {
+		initialize();
+	}
+
+	/**
+	 * Initialize the contents of the frame.
+	 */
+	private void initialize() {
+		frame = new JFrame();
+		frame.setBounds(100, 100, 692, 490);
+		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+		frame.getContentPane().setLayout(null);
+		
+		JLabel lblNewLabel = new JLabel("\u8BA2\u5355\u7F16\u53F7");
+		lblNewLabel.setFont(new Font("瀹嬩綋", Font.PLAIN, 13));
+		lblNewLabel.setBounds(10, 10, 61, 29);
+		frame.getContentPane().add(lblNewLabel);
+		
+		JLabel lblXxxxx = new JLabel("XXXXX");
+		lblXxxxx.setFont(new Font("瀹嬩綋", Font.PLAIN, 13));
+		lblXxxxx.setBounds(93, 10, 61, 29);
+		frame.getContentPane().add(lblXxxxx);
+		
+		JButton btnNewButton = new JButton("\u65B0\u5EFA\u8BA2\u5355");
+		btnNewButton.setFont(new Font("瀹嬩綋", Font.PLAIN, 14));
+		btnNewButton.setBounds(505, 10, 140, 45);
+		frame.getContentPane().add(btnNewButton);
+		
+		JLabel lblNewLabel_1 = new JLabel("\u5546\u54C1\u7F16\u53F7");
+		lblNewLabel_1.setFont(new Font("瀹嬩綋", Font.PLAIN, 18));
+		lblNewLabel_1.setBounds(123, 146, 82, 45);
+		frame.getContentPane().add(lblNewLabel_1);
+		
+		textField = new JTextField();
+		textField.setBounds(233, 146, 209, 34);
+		frame.getContentPane().add(textField);
+		textField.setColumns(10);
+		
+		JLabel lblNewLabel_1_1 = new JLabel("\u5546\u54C1\u6570\u91CF");
+		lblNewLabel_1_1.setFont(new Font("瀹嬩綋", Font.PLAIN, 18));
+		lblNewLabel_1_1.setBounds(123, 228, 82, 45);
+		frame.getContentPane().add(lblNewLabel_1_1);
+		
+		textField_1 = new JTextField();
+		textField_1.setColumns(10);
+		textField_1.setBounds(233, 226, 209, 34);
+		frame.getContentPane().add(textField_1);
+		
+		JButton btnNewButton_1 = new JButton("\u786E\u5B9A");
+		btnNewButton_1.setFont(new Font("瀹嬩綋", Font.PLAIN, 14));
+		btnNewButton_1.setBounds(505, 369, 140, 45);
+		frame.getContentPane().add(btnNewButton_1);
+	}
+}
diff --git a/MainW2.java b/MainW2.java
new file mode 100644
index 0000000000000000000000000000000000000000..4ab469cd8c1edb702d7e41bf5fb30f91c0222938
--- /dev/null
+++ b/MainW2.java
@@ -0,0 +1,70 @@
+package surpermarket;
+
+import java.awt.EventQueue;
+
+import javax.swing.JFrame;
+import javax.swing.JButton;
+import java.awt.Font;
+import java.awt.event.ActionListener;
+import java.awt.event.ActionEvent;
+
+public class MainW2 {
+
+	private JFrame frame;
+
+	/**
+	 * Launch the application.
+	 */
+	public static void main(String[] args) {
+		EventQueue.invokeLater(new Runnable() {
+			public void run() {
+				try {
+					MainW2 window = new MainW2();
+					window.frame.setVisible(true);
+				} catch (Exception e) {
+					e.printStackTrace();
+				}
+			}
+		});
+	}
+
+	/**
+	 * Create the application.
+	 */
+	public MainW2() {
+		initialize();
+	}
+
+	/**
+	 * Initialize the contents of the frame.
+	 */
+	private void initialize() {
+		frame = new JFrame();
+		frame.setTitle("\u7BA1\u7406\u7A97\u53E3");
+		frame.setBounds(100, 100, 812, 654);
+		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+		frame.getContentPane().setLayout(null);
+		frame.setVisible(true);
+		
+		JButton btnNewButton = new JButton("\u8D27\u7269\u64CD\u4F5C");
+		btnNewButton.setFont(new Font("宋体", Font.PLAIN, 18));
+		btnNewButton.setBounds(31, 62, 131, 48);
+		frame.getContentPane().add(btnNewButton);
+		
+		JButton btnNewButton_1 = new JButton("\u804C\u5DE5\u4FE1\u606F\u64CD\u4F5C");
+		btnNewButton_1.addActionListener(new ActionListener() {
+			public void actionPerformed(ActionEvent e) {
+				
+			}
+		});
+		btnNewButton_1.setFont(new Font("宋体", Font.PLAIN, 18));
+		btnNewButton_1.setBounds(279, 65, 179, 52);
+		frame.getContentPane().add(btnNewButton_1);
+		
+		JButton btnNewButton_2 = new JButton("\u8D26\u53F7\u5BC6\u7801\u64CD\u4F5C");
+		btnNewButton_2.setFont(new Font("宋体", Font.PLAIN, 18));
+		btnNewButton_2.setBounds(603, 46, 146, 92);
+		frame.getContentPane().add(btnNewButton_2);
+	}
+
+}
diff --git a/surpermarket/Accountcomm.java b/surpermarket/Accountcomm.java
new file mode 100644
index 0000000000000000000000000000000000000000..33e979c0e5981736564ac8a55d9fa0e4ea35c23a
--- /dev/null
+++ b/surpermarket/Accountcomm.java
@@ -0,0 +1,233 @@
+package surpermarket;
+
+import java.awt.EventQueue;
+
+import javax.swing.JFrame;
+import javax.swing.JLabel;
+import java.awt.Font;
+import java.awt.TextArea;
+
+import javax.swing.JTextField;
+
+
+
+import javax.swing.JButton;
+import javax.swing.JTextArea;
+import java.awt.event.ActionListener;
+import java.awt.geom.Area;
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.awt.event.ActionEvent;
+import surpermarket.QueryAccount;
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.Statement;
+import java.sql.ResultSet;
+import javax.swing.JOptionPane;
+
+public class Accountcomm {
+	
+	private JFrame frame;
+	private JTextField T_account;
+	private JTextField T_password;
+	private JTextField T_position;
+
+	/**
+	 * Launch the application.
+	 */
+	public static void main(String[] args) {
+		EventQueue.invokeLater(new Runnable() {
+			public void run() {
+				try {
+					Accountcomm window = new Accountcomm();
+					window.frame.setVisible(true);
+				} catch (Exception e) {
+					e.printStackTrace();
+				}
+			}
+		});
+	}
+
+	/**
+	 * Create the application.
+	 */
+	public Accountcomm() {
+		initialize();
+	}
+
+	/**
+	 * Initialize the contents of the frame.
+	 */
+	private void initialize() {
+		frame = new JFrame();
+		frame.setAlwaysOnTop(true);
+		frame.setTitle("\u767B\u5F55\u4FE1\u606F\u7BA1\u7406");
+		frame.getContentPane().setLayout(null);
+		frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
+		frame.setVisible(true);
+		
+		
+		JLabel lblNewLabel = new JLabel("\u8D26\u53F7");
+		lblNewLabel.setBounds(59, 82, 70, 39);
+		lblNewLabel.setFont(new Font("宋体", Font.PLAIN, 18));
+		frame.getContentPane().add(lblNewLabel);
+		
+		JLabel lblNewLabel_1 = new JLabel("\u5BC6\u7801");
+		lblNewLabel_1.setBounds(59, 164, 70, 39);
+		lblNewLabel_1.setFont(new Font("宋体", Font.PLAIN, 18));
+		frame.getContentPane().add(lblNewLabel_1);
+		
+		JButton B_add = new JButton("\u589E\u52A0");
+		B_add.addActionListener(new ActionListener() {
+			public void actionPerformed(ActionEvent e) {
+				
+				try {
+					surpermarket.InsertAccount insert=new InsertAccount(T_account.getText(), T_password.getText(),T_position.getText());
+				} catch (Exception e1) {
+					// TODO 自动生成的 catch 块
+					e1.printStackTrace();
+				}
+			}
+		});
+		B_add.setBounds(10, 308, 97, 39);
+		B_add.setFont(new Font("宋体", Font.PLAIN, 15));
+		frame.getContentPane().add(B_add);
+		
+		JButton B_question = new JButton("\u67E5\u8BE2");
+		JTextArea textArea = new JTextArea();                      //新建显示内容窗口TextArea
+		textArea.setBounds(436, 60, 371, 304);    
+		
+		textArea.setEditable(false);
+		textArea.setVisible(true);
+
+		frame.getContentPane().add(textArea);
+		B_question.addActionListener(new ActionListener() {
+			public void actionPerformed(ActionEvent e) {                    //查询按钮的响应
+		
+				//与前端对接  显示查询内容
+////			
+				
+			String account=null;
+			String password=null;
+			String position=null;
+			if(T_account.getText().length()!=0) account=T_account.getText();
+			if(T_password.getText().length()!=0) password=T_password.getText();
+			if(T_position.getText().length()!=0)  position=T_position.getText();
+			try {
+				
+				QueryAccount Q= new QueryAccount(account,password,position);    //新建对象
+				 String[] strings=Q.getstr();
+				 textArea.setText("");                                   //先设置显示面板为空
+				 int i=0;
+				 while(strings[i*3].length()!=0) {
+				 textArea.append(strings[i*3+0]+"  "+strings[i*3+1]+"  "+strings[i*3+2]+"          ");    
+				 textArea.append("\n");
+				 i++;
+				 }
+				 //在textArea显示出其中的一个内容
+//				 a.setText(strings[0]+"  "+strings[1]+"  "+strings[2]);
+					
+				} catch (Exception e1) {
+				// TODO 自动生成的 catch 块
+					e1.printStackTrace();
+				}
+//			   textArea.append("1111111111111111");                           //测试是否是显示出了问题
+//			
+			
+					
+					
+				
+				}
+			
+			
+//			
+//				
+			
+		});
+		B_question.setBounds(117, 308, 97, 39);
+		B_question.setFont(new Font("宋体", Font.PLAIN, 15));
+		frame.getContentPane().add(B_question);
+		
+		JButton B_update = new JButton("\u4FEE\u6539");
+		B_update.addActionListener(new ActionListener() {
+			public void actionPerformed(ActionEvent e) {
+				try {
+					surpermarket.UpdateAccount update=new surpermarket.UpdateAccount(T_account.getText(),T_password.getText(),T_position.getText());  //调用后台Update类  
+				} catch (Exception e1) {
+					// TODO 自动生成的 catch 块
+					e1.printStackTrace();
+				}
+				
+			}
+		});
+		B_update.setBounds(239, 308, 97, 39);
+		B_update.setFont(new Font("宋体", Font.PLAIN, 15));
+		frame.getContentPane().add(B_update);
+		
+		JButton B_delete = new JButton("\u5220\u9664");
+		B_delete.addActionListener(new ActionListener() {
+			public void actionPerformed(ActionEvent e) {
+				try {
+					surpermarket.DeleteAccount delete=new surpermarket.DeleteAccount(T_account.getText());                        //调用后台DELETE类
+				} catch (Exception e1) {
+					// TODO 自动生成的 catch 块
+					e1.printStackTrace();
+				}
+			}
+		});
+		B_delete.setBounds(10, 370, 97, 39);
+		B_delete.setFont(new Font("宋体", Font.PLAIN, 15));
+		frame.getContentPane().add(B_delete);
+		
+		JButton B_questionall = new JButton("\u67E5\u8BE2\u5168\u4F53");
+		B_questionall.addActionListener(new ActionListener() {
+			public void actionPerformed(ActionEvent e) {
+				try {
+					surpermarket.QueryALLAccount qa=new surpermarket.QueryALLAccount();                        //调用后台DELETE类
+					String[] strings=qa.getstr();
+					textArea.setText("账号           密码               职位             \n");                                   //先设置显示面板为空
+					 int i=0;
+					 while(strings[i*3].length()!=0) {
+					 textArea.append(strings[i*3+0]+"      "+strings[i*3+1]+"     "+strings[i*3+2]+"       ");    
+					 textArea.append("\n");
+					 i++;
+					 }
+				} catch (Exception e1) {
+					// TODO 自动生成的 catch 块
+					e1.printStackTrace();
+				}
+				
+			}
+		});
+		B_questionall.setBounds(117, 370, 145, 76);
+		B_questionall.setFont(new Font("宋体", Font.PLAIN, 15));
+		frame.getContentPane().add(B_questionall);
+		
+		JLabel lblNewLabel_1_1 = new JLabel("\u6743\u9650");
+		lblNewLabel_1_1.setBounds(59, 238, 70, 39);
+		lblNewLabel_1_1.setFont(new Font("宋体", Font.PLAIN, 18));
+		frame.getContentPane().add(lblNewLabel_1_1);
+		
+		T_account = new JTextField();
+		T_account.setBounds(158, 71, 215, 37);
+		T_account.setFont(new Font("宋体", Font.PLAIN, 16));
+		T_account.setColumns(10);
+		frame.getContentPane().add(T_account);
+		
+		T_password = new JTextField();
+		T_password.setBounds(148, 164, 215, 37);
+		T_password.setFont(new Font("宋体", Font.PLAIN, 16));
+		T_password.setColumns(10);
+		frame.getContentPane().add(T_password);
+		
+		T_position = new JTextField();
+		T_position.setBounds(148, 238, 215, 37);
+		T_position.setFont(new Font("宋体", Font.PLAIN, 16));
+		T_position.setColumns(10);
+		frame.getContentPane().add(T_position);
+		
+		
+		
+		
+	}
+}
diff --git a/surpermarket/Date_Change.java b/surpermarket/Date_Change.java
new file mode 100644
index 0000000000000000000000000000000000000000..7c8e0fde75c0aea0907c200576f20f858e3cae4b
--- /dev/null
+++ b/surpermarket/Date_Change.java
@@ -0,0 +1,21 @@
+package surpermarket;
+
+import java.text.ParseException;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+
+public class Date_Change {
+	String[] formatStrings = { "y/M/d", "y.M.d", "y-M-d" }; // 
+
+	public Date tryParse(String dateString) {
+		for (String formatString : formatStrings) {
+			try {
+				return new SimpleDateFormat(formatString).parse(dateString);
+			} catch (ParseException e) {
+			}
+		}
+
+		return null;
+	}
+
+}
\ No newline at end of file
diff --git a/surpermarket/DeleteAccount.java b/surpermarket/DeleteAccount.java
new file mode 100644
index 0000000000000000000000000000000000000000..38969ad2a58519761822704bb6d8f7282ad09c55
--- /dev/null
+++ b/surpermarket/DeleteAccount.java
@@ -0,0 +1,69 @@
+package surpermarket;
+
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+
+import javax.swing.JOptionPane;
+
+public class DeleteAccount
+{
+	
+	// 加载数据库驱动  com.mysql.jdbc.Driver
+    public static final String DBDRIVER = "com.mysql.cj.jdbc.Driver";
+    
+    // 获取mysql连接地址      
+    public static final String DBURL = "jdbc:mysql://localhost:3306/supermarket?&useSSL=false&allowPublicKeyRetrieval=true&serverTimezone=UTC";
+    
+    // 数据名称
+    public static final String DBUSER = "root";
+    
+    // 数据库密码
+    public static final String DBPASS = "00000000";
+
+    
+    public DeleteAccount(String account) throws Exception{
+	        
+    	if(account==null) {                        //判断输入框账号是否为空         
+    		
+    		JOptionPane.showMessageDialog(null,"对不起！必须输入账号方可执行删除。");
+    	}
+    	else {
+    		
+	        Connection conn = null;                // 数据的连接
+	        PreparedStatement pstmt = null;                 // 数据库的操作
+	        ResultSet rs = null;
+	        
+	        String sql = "SELECT Account,Password,Position FROM ACCOUNT WHERE Account=?";    //实例sql查询语句
+	        
+	        Class.forName(DBDRIVER);               //加载驱动程序 
+        	conn = DriverManager.getConnection(DBURL,DBUSER,DBPASS);          //连接MySQL数据库时，要写上连接的用户名和密码
+        	
+	        pstmt = conn.prepareStatement(sql,ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE);                               //实例化Preparedstatsment对象
+	        
+	        pstmt.setString(1,account);                //按顺序设置?内容
+	        
+	        rs = pstmt.executeQuery();                 //执行数据库查询操作
+	        
+	        if(rs.next()==false) {                            //判断表中是否已有该账户
+        		JOptionPane.showMessageDialog(null,"该账户不存在，请检查是否输入错误账户信息。");
+        	}
+	        else {
+	        	rs.last();                                 //移动到最后一行
+		        rs.deleteRow();                            //执行删除操作
+		        JOptionPane.showMessageDialog(null,"删除完成！");
+	        }  
+	        rs.close();
+	        pstmt.close();
+	        conn.close();
+    	}
+	 }    
+    
+    
+    //--------测试------------------
+    public static void main(String[] args) throws Exception {
+    	new DeleteAccount("zhanhao");         //执行删除操作只需获取输入框中的用户账号
+    }
+    
+}
\ No newline at end of file
diff --git a/surpermarket/DeleteStaff.java b/surpermarket/DeleteStaff.java
new file mode 100644
index 0000000000000000000000000000000000000000..51196253712afd6f4455faea11e8694a83099016
--- /dev/null
+++ b/surpermarket/DeleteStaff.java
@@ -0,0 +1,70 @@
+package surpermarket;
+
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+
+import javax.swing.JOptionPane;
+
+public class DeleteStaff
+{
+	
+	// 加载数据库驱动  com.mysql.jdbc.Driver
+    public static final String DBDRIVER = "com.mysql.cj.jdbc.Driver";
+    
+    // 获取mysql连接地址      
+    public static final String DBURL = "jdbc:mysql://localhost:3306/supermarket?&useSSL=false&allowPublicKeyRetrieval=true&serverTimezone=UTC";
+    
+    // 数据名称
+    public static final String DBUSER = "root";
+    
+    // 数据库密码
+    public static final String DBPASS = "00000000";
+
+    
+    public DeleteStaff(String sno) throws Exception{
+	        
+    	if(sno==null) {            //判断输入框中职工编号是否为空
+    		
+    		JOptionPane.showMessageDialog(null,"对不起！职工编号不能为空，请重新输入方可删除。");
+    	}
+    	else {
+    		
+	        Connection conn = null;                // 数据的连接
+	        PreparedStatement pstmt = null;                 // 数据库的操作
+	        ResultSet rs = null;
+	        
+	        String sql = "SELECT Sno,Sname,Sposition,Sphone FROM STAFF WHERE Sno=?";
+	        
+	        Class.forName(DBDRIVER);               //加载驱动程序 
+        	conn = DriverManager.getConnection(DBURL,DBUSER,DBPASS);          //连接MySQL数据库时，要写上连接的用户名和密码
+        	
+	        pstmt = conn.prepareStatement(sql,ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE);                               //实例化Preparedstatsment对象
+	        
+	        pstmt.setString(1,sno);                //按顺序设置?内容
+	        
+	        rs = pstmt.executeQuery();                 //执行数据库查询操作
+	        
+	        if(rs.next()==false) {                            //判断表中是否已有该编号员工
+
+        		JOptionPane.showMessageDialog(null,"该编号员工不存在，请检查是否输入错误编号。");
+        	}
+	        else {
+	        	rs.last();                                 //移动到最后一行
+		        rs.deleteRow();                            //执行删除操作
+		        JOptionPane.showMessageDialog(null,"删除完成！");
+	        }  
+	        rs.close();
+	        pstmt.close();
+	        conn.close();
+    	}
+	 }    
+    
+    
+    //--------测试------------------
+    public static void main(String[] args) throws Exception {
+    	new DeleteStaff("3118005097");                   //删除员工表信息继续获取职工编号
+    }
+    
+}
\ No newline at end of file
diff --git a/surpermarket/Goodscomm.java b/surpermarket/Goodscomm.java
new file mode 100644
index 0000000000000000000000000000000000000000..cf41cad3aed0900d86adb36a90f4f0c24395e5fd
--- /dev/null
+++ b/surpermarket/Goodscomm.java
@@ -0,0 +1,283 @@
+package surpermarket;
+
+import java.awt.EventQueue;
+
+import javax.swing.JFrame;
+import javax.swing.JLabel;
+import java.awt.Font;
+import javax.swing.JTextField;
+import javax.swing.JButton;
+import javax.swing.JTextArea;
+import java.awt.event.ActionListener;
+import java.awt.event.ActionEvent;
+
+public class Goodscomm {
+
+	private JFrame frame;
+	private JTextField T_bigType;
+	private JTextField T_smallType;
+	private JTextField T_goodsName;
+	private JTextField T_singalPrice;
+	private JTextField T_Num;
+	private JTextField T_enterPrice;
+	private JTextField T_startTime;
+	private JTextField T_endTime;
+
+	/**
+	 * Launch the application.
+	 */
+	public static void main(String[] args) {
+		EventQueue.invokeLater(new Runnable() {
+			public void run() {
+				try {
+					Goodscomm window = new Goodscomm();
+					window.frame.setVisible(true);
+				} catch (Exception e) {
+					e.printStackTrace();
+				}
+			}
+		});
+	}
+
+	/**
+	 * Create the application.
+	 */
+	public Goodscomm() {
+		initialize();
+	}
+
+	/**
+	 * Initialize the contents of the frame.
+	 */
+	private void initialize() {
+		frame = new JFrame();
+		frame.setBounds(100, 100, 947, 636);
+		frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
+		frame.getContentPane().setLayout(null);
+		frame.setVisible(true);
+		
+		JTextArea textArea = new JTextArea();
+		textArea.setEditable(false);
+		textArea.setBounds(52, 249, 694, 328);
+		frame.getContentPane().add(textArea);
+		
+		JLabel lblNewLabel = new JLabel("\u5927\u7C7B\u540D");
+		lblNewLabel.setFont(new Font("宋体", Font.PLAIN, 15));
+		lblNewLabel.setBounds(41, 43, 63, 31);
+		frame.getContentPane().add(lblNewLabel);
+		
+		JLabel lblNewLabel_1 = new JLabel("\u5C0F\u7C7B\u540D");
+		lblNewLabel_1.setFont(new Font("宋体", Font.PLAIN, 15));
+		lblNewLabel_1.setBounds(36, 100, 63, 31);
+		frame.getContentPane().add(lblNewLabel_1);
+		
+		JLabel lblNewLabel_2 = new JLabel("\u5546\u54C1\u540D");
+		lblNewLabel_2.setFont(new Font("宋体", Font.PLAIN, 15));
+		lblNewLabel_2.setBounds(34, 149, 63, 31);
+		frame.getContentPane().add(lblNewLabel_2);
+		
+		JLabel lblNewLabel_3 = new JLabel("\u5355\u4EF7");
+		lblNewLabel_3.setFont(new Font("宋体", Font.PLAIN, 15));
+		lblNewLabel_3.setBounds(33, 193, 63, 31);
+		frame.getContentPane().add(lblNewLabel_3);
+		
+		JLabel lblNewLabel_4 = new JLabel("\u6570\u91CF");
+		lblNewLabel_4.setFont(new Font("宋体", Font.PLAIN, 15));
+		lblNewLabel_4.setBounds(291, 37, 63, 31);
+		frame.getContentPane().add(lblNewLabel_4);
+		
+		JLabel lblNewLabel_5 = new JLabel("\u8FDB\u4EF7");
+		lblNewLabel_5.setFont(new Font("宋体", Font.PLAIN, 15));
+		lblNewLabel_5.setBounds(288, 78, 63, 31);
+		frame.getContentPane().add(lblNewLabel_5);
+		
+		JLabel lblNewLabel_6 = new JLabel("\u8D77\u59CB\u65F6\u95F4");
+		lblNewLabel_6.setFont(new Font("宋体", Font.PLAIN, 15));
+		lblNewLabel_6.setBounds(282, 128, 63, 31);
+		frame.getContentPane().add(lblNewLabel_6);
+		
+		JLabel lblNewLabel_7 = new JLabel("\u622A\u6B62\u65F6\u95F4");
+		lblNewLabel_7.setFont(new Font("宋体", Font.PLAIN, 15));
+		lblNewLabel_7.setBounds(284, 184, 63, 31);
+		frame.getContentPane().add(lblNewLabel_7);
+		
+		T_bigType = new JTextField();
+		T_bigType.setBounds(91, 39, 125, 29);
+		frame.getContentPane().add(T_bigType);
+		T_bigType.setColumns(10);
+		
+		T_smallType = new JTextField();
+		T_smallType.setColumns(10);
+		T_smallType.setBounds(93, 98, 125, 29);
+		frame.getContentPane().add(T_smallType);
+		
+		T_goodsName = new JTextField();
+		T_goodsName.setColumns(10);
+		T_goodsName.setBounds(96, 149, 125, 29);
+		frame.getContentPane().add(T_goodsName);
+		
+		T_singalPrice = new JTextField();
+		T_singalPrice.setColumns(10);
+		T_singalPrice.setBounds(97, 191, 125, 29);
+		frame.getContentPane().add(T_singalPrice);
+		
+		T_Num = new JTextField();
+		T_Num.setColumns(10);
+		T_Num.setBounds(342, 38, 125, 29);
+		frame.getContentPane().add(T_Num);
+		
+		T_enterPrice = new JTextField();
+		T_enterPrice.setColumns(10);
+		T_enterPrice.setBounds(341, 80, 125, 29);
+		frame.getContentPane().add(T_enterPrice);
+		
+		T_startTime = new JTextField();
+		T_startTime.setColumns(10);
+		T_startTime.setBounds(348, 125, 125, 29);
+		frame.getContentPane().add(T_startTime);
+		
+		T_endTime = new JTextField();
+		T_endTime.setColumns(10);
+		T_endTime.setBounds(351, 182, 125, 29);
+		frame.getContentPane().add(T_endTime);
+		
+		JButton B_soldOrder = new JButton("\u9500\u552E\u6392\u884C");
+		B_soldOrder.setFont(new Font("宋体", Font.PLAIN, 16));
+		B_soldOrder.setBounds(549, 205, 101, 35);
+		frame.getContentPane().add(B_soldOrder);
+		
+		JButton B_soldAnalysis = new JButton("\u9500\u552E\u5206\u6790");
+		B_soldAnalysis.setFont(new Font("宋体", Font.PLAIN, 16));
+		B_soldAnalysis.setBounds(669, 205, 101, 35);
+		frame.getContentPane().add(B_soldAnalysis);
+		
+		JButton B_enterOutGoods = new JButton("\u51FA\u5165\u5E93\u67E5\u8BE2");
+		B_enterOutGoods.setToolTipText("\u586B\u5199\u5927\u7C7B/\u5C0F\u7C7B\u5176\u4E2D\u4E00\u4E2A\uFF0C\u5E76\u8F93\u5165\u8D77\u59CB\u65F6\u95F4");
+		B_enterOutGoods.addActionListener(new ActionListener() {
+			public void actionPerformed(ActionEvent e) {
+				
+				String st =T_smallType.getText();
+				String bt =T_bigType.getText();
+				String cn=T_goodsName.getText();
+				
+				surpermarket.Query_Enter_Exit_Cargo qee =new surpermarket.Query_Enter_Exit_Cargo(cn, T_startTime.getText(), T_endTime.getText());
+
+				String[] strings=qee.getstr();
+				textArea.setText("");
+				int i=0;
+				while(strings[i].length()!=0) {
+					textArea.append(strings[i]);
+					textArea.append("\n");
+					i++;
+				}
+				
+				
+			}
+		});
+		B_enterOutGoods.setFont(new Font("宋体", Font.PLAIN, 16));
+		B_enterOutGoods.setBounds(766, 27, 126, 46);
+		frame.getContentPane().add(B_enterOutGoods);
+		
+		JButton B_soldHistory = new JButton("\u6D41\u6C34");
+		B_soldHistory.addActionListener(new ActionListener() {
+			public void actionPerformed(ActionEvent e) {
+				surpermarket.Query_turnover qt =new Query_turnover(T_startTime.getText(), T_endTime.getText());
+				String string=qt.getstr();
+				textArea.setText(string);
+			}
+		});
+		B_soldHistory.setFont(new Font("宋体", Font.PLAIN, 16));
+		B_soldHistory.setBounds(780, 201, 101, 35);
+		frame.getContentPane().add(B_soldHistory);
+		
+		JButton B_update = new JButton("\u4FEE\u6539");
+		B_update.setFont(new Font("宋体", Font.PLAIN, 16));
+		B_update.setBounds(766, 91, 126, 46);
+		frame.getContentPane().add(B_update);
+		
+		JButton B_enter = new JButton("\u5165\u5E93");
+		B_enter.setFont(new Font("宋体", Font.PLAIN, 16));
+		B_enter.setBounds(766, 140, 126, 46);
+		frame.getContentPane().add(B_enter);
+		
+		JButton B_queryGoods = new JButton("\u67E5\u8BE2\u5546\u54C1\u4FE1\u606F");
+		B_queryGoods.setToolTipText(" \u8F93\u5165\u5927\u7C7B\u540D/\u5C0F\u7C7B\u540D/\u5546\u54C1\u540D");
+		B_queryGoods.addActionListener(new ActionListener() {
+			public void actionPerformed(ActionEvent e) {
+				
+				QueryCargo qc;
+				try {
+					String bigtype =null;
+					String smalltype =null;
+					String   cname    =null;
+					if(T_bigType.getText().length()!=0) bigtype=T_bigType.getText();
+					if(T_smallType.getText().length()!=0)  smalltype=T_smallType.getText();
+					if(T_goodsName.getText().length()!=0)  cname=T_goodsName.getText();
+					qc = new QueryCargo(bigtype, smalltype,cname );
+					String sb=qc.getstb();
+					String[] sm =qc.getstm();
+					String[] sr =qc.getstr();
+
+					textArea.setText(" 货物大类编号："+sb+"\n");
+					textArea.append("-------------------------------------------- \n");
+					
+					textArea.append("货物小类信息：\n");
+					int x=0;
+					while(sm[x]!=null) x=x+3;
+					for(int i=0;i<x/3;i++) {
+			    		String account = sm[i*3+0];
+			    		textArea.append("小类编号："+account+"\t");
+			    		String password = sm[i*3+1];
+			    		textArea.append("小类名字："+password+"\t");
+			    		String position = sm[i*3+2];
+			    		textArea.append("大类编号："+position+"\t"+"\n");
+			    	}
+					textArea.append("-------------------------------------------- \n");
+					
+					x=0;
+
+			    	x=0;
+			    	while(sr[x]!=null) x=x+5;
+			    	
+			    	//循环输出结果集中内容
+			    	textArea.append("货物信息：\n");
+			    	for(int i=0;i<x/5;i++) {
+			    		String account = sr[i*5+0];
+			    		textArea.append("货物编号："+account+"\t");
+			    		String password = sr[i*5+1];
+			    		textArea.append("货物名："+password+"\t");
+			    		String position = sr[i*5+2];
+			    		textArea.append("货物价格："+position+"\t");
+			    		String account1 = sr[i*5+3];
+			    		textArea.append("货物数量："+account1+"\t");
+			    		String account2 = sr[i*5+4];
+			    		textArea.append("小类编号："+account2+"\t"+"\n");
+			    	}
+			    	System.out.println("-------------------------------");
+				} catch (Exception e1) {
+					// TODO 自动生成的 catch 块
+					e1.printStackTrace();
+				}
+				
+		    	
+				
+				
+			}
+		});
+		B_queryGoods.setFont(new Font("宋体", Font.PLAIN, 16));
+		B_queryGoods.setBounds(526, 24, 147, 66);
+		frame.getContentPane().add(B_queryGoods);
+		
+		JButton 添加商品 = new JButton("\u6DFB\u52A0\u5546\u54C1");
+		添加商品.setFont(new Font("宋体", Font.PLAIN, 16));
+		添加商品.setBounds(524, 91, 126, 46);
+		frame.getContentPane().add(添加商品);
+		
+		JButton B_update_2 = new JButton("\u5220\u9664\u5546\u54C1");
+		B_update_2.setFont(new Font("宋体", Font.PLAIN, 16));
+		B_update_2.setBounds(526, 149, 126, 46);
+		frame.getContentPane().add(B_update_2);
+		
+		
+	}
+}
diff --git a/surpermarket/InsertAccount.java b/surpermarket/InsertAccount.java
new file mode 100644
index 0000000000000000000000000000000000000000..e7cd918eda33f261d01da88752b3f76766a67f8e
--- /dev/null
+++ b/surpermarket/InsertAccount.java
@@ -0,0 +1,74 @@
+package surpermarket;
+
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+
+import javax.swing.JOptionPane;
+
+public class InsertAccount
+{
+	
+	// 加载数据库驱动  com.mysql.jdbc.Driver
+    public static final String DBDRIVER = "com.mysql.cj.jdbc.Driver";
+    
+    // 获取mysql连接地址      
+    public static final String DBURL = "jdbc:mysql://localhost:3306/supermarket?&useSSL=false&allowPublicKeyRetrieval=true&serverTimezone=UTC";
+    
+    // 数据名称
+    public static final String DBUSER = "root";
+    
+    // 数据库密码
+    public static final String DBPASS = "00000000";
+
+    
+    public InsertAccount(String account,String password,String position) throws Exception
+	{
+    	if(account==null) {              //判断账号输入框中是否为空
+    		
+    		JOptionPane.showMessageDialog(null,"对不起！账号不能为空，请输入你的合法账号。");
+    	}
+    	else {
+	        Connection conn = null;                         // 数据的连接
+	        PreparedStatement stmtcx = null;
+	        PreparedStatement pstmt = null;                 // 数据库的操作
+	        ResultSet rs = null;                            // 指向查询结果
+	        
+	        String sqlcx = "SELECT * FROM ACCOUNT WHERE Account=?";                           //查询语句
+	        String sql = "INSERT INTO ACCOUNT(Account,Password,Position) "+" VALUES(?,?,?)";   //插入语句
+	        
+	        Class.forName(DBDRIVER);                                           //加载驱动程序 
+        	conn = DriverManager.getConnection(DBURL,DBUSER,DBPASS);          //连接MySQL数据库时，要写上连接的用户名和密码
+        	
+        	stmtcx = conn.prepareStatement(sqlcx);                         //实例化preparedstatsment对象
+        	stmtcx.setString(1, account);
+        	rs = stmtcx.executeQuery();                                    //执行数据库查询操作
+        	
+        	if(rs.next()) {                            //判断表中是否已存在该账户
+        		
+        		JOptionPane.showMessageDialog(null,"该账号已经存在，请输入其他账号。");
+        		stmtcx.close();
+        		rs.close();
+        	}
+        	else {
+        		pstmt = conn.prepareStatement(sql);               //实例化Preparedstatsment对象
+    	        
+    	        pstmt.setString(1,account);                //按顺序设置?内容
+    	        pstmt.setString(2,password);
+    	        pstmt.setString(3,position);
+    	        
+    	        pstmt.executeUpdate();               //执行数据库插入操作
+    	        JOptionPane.showMessageDialog(null,"账号信息信息已添加完成！");
+    	        pstmt.close();
+        	}
+        	conn.close();
+    	}
+	 }       
+    
+    
+    //--------测试------------------
+    public static void main(String[] args) throws Exception {
+    	new InsertAccount("ccTV五十","sss","经理");              //必须输入账号，其余可设置为null
+    }
+}
\ No newline at end of file
diff --git a/surpermarket/InsertCargosold.java b/surpermarket/InsertCargosold.java
new file mode 100644
index 0000000000000000000000000000000000000000..98f4ed3a01dbec749978272a2a7eb424f9eeaa1c
--- /dev/null
+++ b/surpermarket/InsertCargosold.java
@@ -0,0 +1,132 @@
+package surpermarket;
+
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+
+import javax.swing.JOptionPane;
+
+public class InsertCargosold
+{
+	
+	// 加载数据库驱动  com.mysql.jdbc.Driver
+    public static final String DBDRIVER = "com.mysql.cj.jdbc.Driver";
+    
+    // 获取mysql连接地址      
+    public static final String DBURL = "jdbc:mysql://localhost:3306/supermarket?&useSSL=false&allowPublicKeyRetrieval=true&serverTimezone=UTC";
+    
+    // 数据名称
+    public static final String DBUSER = "root";
+    
+    // 数据库密码
+    public static final String DBPASS = "00000000";
+
+    
+    public InsertCargosold(String soldno,String cno,int soldnum) throws Exception
+	{
+    	if(soldno==null) {              //判断商品编号输入框中是否为空
+    		
+    		JOptionPane.showMessageDialog(null,"对不起！商品编号不能为空，请输入商品编号。");
+    	}
+    	else {
+	        Connection conn = null;                         // 数据的连接
+	        PreparedStatement pstmt = null;                 // 数据库的操作
+	        PreparedStatement stmt = null;                 // 数据库的操作
+	        ResultSet rs = null;                            // 指向查询结果
+	        ResultSet ks = null;                            // 指向查询结果
+	        
+	        
+	        String sqlcx = "SELECT * FROM CARGOSOLD WHERE Soldno=?" + " AND Cno=?";             //查询语句
+	        String sqllx = "SELECT * FROM CARGO WHERE Cno=?";                              //查询语句
+	        
+	        Class.forName(DBDRIVER);                                           //加载驱动程序 
+        	conn = DriverManager.getConnection(DBURL,DBUSER,DBPASS);          //连接MySQL数据库时，要写上连接的用户名和密码
+        	
+        	pstmt = conn.prepareStatement(sqlcx,ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE);         //实例化preparedstatsment对象
+        	pstmt.setString(1,soldno);
+        	pstmt.setString(2,cno);
+        	rs = pstmt.executeQuery();                                    //执行数据库查询操作
+        	
+        	stmt = conn.prepareStatement(sqllx,ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE);         //实例化preparedstatsment对象
+        	stmt.setString(1,cno);
+        	ks = stmt.executeQuery();                                    //执行数据库查询操作
+        	
+        	if(rs.next()) {                          //判断是否有重复（订单号+商品编号）主码
+        		
+        		ks.next();
+        		int oldnum1 = rs.getInt(3);
+        		int oldnum2 = ks.getInt(4);
+        		int newnum1 = oldnum1 + soldnum;
+        		int newnum2 = oldnum2 + soldnum;
+        		String cname = ks.getString(2);
+        		
+        		rs.updateInt("Soldnum", newnum1);    
+        		ks.updateInt("Cnum",newnum2);
+        		
+        		rs.updateRow();                              //修改商品数量
+        		ks.updateRow();
+        		
+        		JOptionPane.showMessageDialog(null,"重复操作提示：\n"+cname+"数量已叠加到订单上"+cname+"的总数量\n"+"此时订单上"+cname+"数目为："+newnum1+"\n请检查无误后继续。");
+        		
+        		ks.close();
+        		stmt.close();
+        		rs.close();
+        		pstmt.close();
+        		conn.close();                                  //关闭数据库链接
+        		
+        	} 
+        	else {
+        		
+        		if(ks.next()==false) {                  //判断CARGO表中是否有商品编号对应的出售价格
+            		JOptionPane.showMessageDialog(null,"该编号商品无价格记录，请检查商品编号是否输入正确或先添加该商品记录！");
+            		
+            		ks.close();
+            		stmt.close();
+            		rs.close();
+            		pstmt.close();
+            		conn.close();
+            	}
+        		else {
+        			
+        			float cprice = ks.getFloat(3);                          //获取该货物单价
+            		rs.close();
+            		pstmt.close();
+            		
+            		String sql = "SELECT Soldno,Cno,Soldnum,Cprice,Sdate FROM CARGOSOLD";            //查询语句
+            		
+            		pstmt = conn.prepareStatement(sql,ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE);         //实例化preparedstatsment对象
+            		rs = pstmt.executeQuery();
+            		rs.moveToInsertRow();                       //移动到可插入位置
+            		
+            		rs.updateString("Soldno",soldno);           //将订单信息添加到CARGOSOLD表中
+            		rs.updateString("Cno",cno);
+            		rs.updateInt("Soldnum",soldnum);
+            		rs.updateFloat("Cprice",cprice);
+            		rs.updateDate("Sdate",new java.sql.Date(new java.util.Date().getTime()));
+            		
+            		rs.insertRow();                    //执行插入操作
+            		
+            		int oldnum2 = ks.getInt(4);
+            		int newnum2 = oldnum2 + soldnum;
+            		
+            		ks.updateInt("Cnum",newnum2);
+            		ks.updateRow();
+            		
+            		ks.close();
+            		stmt.close();
+            		rs.close();
+            		pstmt.close();
+            		conn.close();
+        		}
+        	}
+        	
+    	}
+	 }       
+    
+    
+    //--------测试------------------
+    public static void main(String[] args) throws Exception {
+    	new InsertCargosold("66-122","112233",12);              //必须输入商品编号，括号中类型：（订单号（String）,商品编号（String）,商品数量（int））
+    }
+}
\ No newline at end of file
diff --git a/surpermarket/InsertStaff.java b/surpermarket/InsertStaff.java
new file mode 100644
index 0000000000000000000000000000000000000000..aac3158cc4cdfec374eaf09e05128fa0796d88f5
--- /dev/null
+++ b/surpermarket/InsertStaff.java
@@ -0,0 +1,75 @@
+package surpermarket;
+
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+
+import javax.swing.JOptionPane;
+
+public class InsertStaff
+{
+	
+	// 加载数据库驱动  com.mysql.jdbc.Driver
+    public static final String DBDRIVER = "com.mysql.cj.jdbc.Driver";
+    
+    // 获取mysql连接地址      
+    public static final String DBURL = "jdbc:mysql://localhost:3306/supermarket?&useSSL=false&allowPublicKeyRetrieval=true&serverTimezone=UTC";
+    
+    // 数据名称
+    public static final String DBUSER = "root";
+    
+    // 数据库密码
+    public static final String DBPASS = "00000000";
+
+    
+    public InsertStaff(String sno,String sname,String sposition,String sphone) throws Exception
+	{
+    	if(sno==null) {               //判断职工编号输入框中是否为空
+    		
+    		JOptionPane.showMessageDialog(null,"对不起！职工编号不能为空，请重新输入再添加。");
+    	}
+    	else {
+	        Connection conn = null;                         // 数据的连接
+	        PreparedStatement stmtcx = null;
+	        PreparedStatement pstmt = null;                 // 数据库的操作
+	        ResultSet rs = null;                            // 指向查询结果
+	        
+	        String sqlcx = "SELECT * FROM STAFF WHERE Sno=?";                                //查询语句
+	        String sql = "INSERT INTO STAFF(Sno,Sname,Sposition,Sphone) "+" VALUES(?,?,?,?)";    //插入语句
+	        
+	        Class.forName(DBDRIVER);                                           //加载驱动程序 
+        	conn = DriverManager.getConnection(DBURL,DBUSER,DBPASS);          //连接MySQL数据库时，要写上连接的用户名和密码
+        	
+        	stmtcx = conn.prepareStatement(sqlcx);                         //实例化preparedstatsment对象
+        	stmtcx.setString(1, sno);
+        	rs = stmtcx.executeQuery();                                    //执行数据库查询操作
+        	
+        	if(rs.next()) {                            //判断表中是否已有该编号：有则提示错误，无则执行插入操作
+
+        		JOptionPane.showMessageDialog(null,"该职工编号已存在，请修改编号重新添加。");
+        		stmtcx.close();
+        		rs.close();
+        	}
+        	else {
+        		pstmt = conn.prepareStatement(sql);                    //实例化Preparedstatsment对象
+    	        
+    	        pstmt.setString(1,sno);                //按顺序设置?内容
+    	        pstmt.setString(2,sname);
+    	        pstmt.setString(3,sposition);
+    	        pstmt.setString(4,sphone);
+    	        
+    	        pstmt.executeUpdate();               //执行数据库插入操作
+    	        JOptionPane.showMessageDialog(null,"信息添加已添加完成！");
+    	        pstmt.close();
+        	}
+        	conn.close();
+    	}
+	 }       
+    
+    
+    //--------测试------------------
+    public static void main(String[] args) throws Exception {
+    	new InsertStaff("443","mm2b2b","售货员",null);              //必须获取职工编号，其余可为null
+    }
+}
\ No newline at end of file
diff --git a/surpermarket/Login.java b/surpermarket/Login.java
new file mode 100644
index 0000000000000000000000000000000000000000..f561fa8cbae2ff6bc017b024e7319b0a5878a765
--- /dev/null
+++ b/surpermarket/Login.java
@@ -0,0 +1,76 @@
+package surpermarket;
+import java.awt.Dimension;
+import java.awt.FlowLayout;
+import java.awt.Font;
+
+import javax.swing.JButton;
+import javax.swing.JFrame;
+import javax.swing.JLabel;
+import javax.swing.JPasswordField;
+import javax.swing.JTextField;
+
+public class Login {
+
+
+    public static void main(String[] args) {
+        Login login=new Login();
+        login.InitUI();
+    }
+
+
+     void InitUI() {
+        //初始化窗体
+        JFrame frame=new JFrame();
+
+        //建立窗体基本参数
+
+        frame.setTitle("超市货物管理系统登录");//标题
+        frame.setSize(400, 650);//窗体大小
+        frame.setDefaultCloseOperation(3);//窗体关闭操作
+        frame.setLocationRelativeTo(null);//窗体居中
+        frame.setResizable(false);//禁止调整窗口大小
+        //实例化布局对象，指定对齐方式
+        FlowLayout f1=new FlowLayout(FlowLayout.CENTER,10,10);
+        frame.setLayout(f1);
+
+        //将元素组件添加到窗体上
+
+        JLabel labIcon=new JLabel("登录|LOGIN");
+        Font font= new Font("宋体",Font.PLAIN,30);
+        labIcon.setFont(font);//设置字体
+        Dimension dim=new Dimension(400,300);
+        labIcon.setPreferredSize(dim);
+        labIcon.setHorizontalAlignment(JLabel.CENTER);//设置字体居中
+        frame.add(labIcon);//设置最上方标签
+
+        JLabel labName=new JLabel("账号：");
+        frame.add(labName);//设置账号标签
+
+        JTextField textName=new JTextField();
+        Dimension dim1=new Dimension(300,30);
+        textName.setPreferredSize(dim1);
+        frame.add(textName);//设置账号输入框
+
+        JLabel labpass=new JLabel("密码：");
+        frame.add(labpass);//设置密码标签
+
+        JPasswordField textword=new JPasswordField();
+        textword.setPreferredSize(dim1);
+        frame.add(textword);//设置密码输入框
+
+        JButton button=new JButton();
+        Dimension dim2=new Dimension(100,30);
+        button.setText("登录");
+        button.setSize(dim2);
+        frame.add(button);//添加登录按钮
+
+        frame.setVisible(true);
+        //设置登录按钮的监听机制
+        LoginListener l1=new LoginListener(frame,textName,textword);
+        button.addActionListener(l1);
+
+
+    }
+
+
+}
diff --git a/surpermarket/LoginListener.java b/surpermarket/LoginListener.java
new file mode 100644
index 0000000000000000000000000000000000000000..1e2dd0e59a112d35f1ec8a4123028c022d2fcc81
--- /dev/null
+++ b/surpermarket/LoginListener.java
@@ -0,0 +1,86 @@
+package surpermarket;
+import java.awt.*;
+import java.sql.*;
+import javax.swing.ImageIcon;
+import javax.swing.JFrame;
+import javax.swing.JLabel;
+import javax.swing.JOptionPane;
+import javax.swing.JTextField;
+import javax.swing.JPasswordField;
+import javax.swing.JButton;
+import java.awt.event.ActionListener;
+import java.awt.event.ActionEvent;
+import java.sql.DriverManager;
+import java.sql.ResultSet;
+import java.sql.Statement;
+import static java.lang.Class.forName;
+import surpermarket.*;
+public class LoginListener implements ActionListener {
+
+    private JTextField user;
+    private JPasswordField password;
+    private JFrame login;
+
+    public LoginListener(JFrame login, JTextField user, JPasswordField password) {
+        this.login = login;
+        this.user = user;
+        this.password = password;//将值传递给Listener
+    }
+
+    public void actionPerformed(ActionEvent e) {
+        String url = "jdbc:mysql://localhost:3306/supermarket?&useSSL=false&allowPublicKeyRetrieval=true&serverTimezone=UTC";
+        String USER = "root";
+        String PASSWORD = "00000000";
+        int flag=0;
+        try {
+            Class.forName("com.mysql.jdbc.Driver");
+            System.out.println("数据库驱动加载成功");
+            Connection conn = DriverManager.getConnection(url, USER, PASSWORD);
+            System.out.println("数据库连接成功");
+            Statement statement = conn.createStatement();
+            ResultSet rs = statement.executeQuery("select * from account");
+           
+            
+            while (rs.next()){
+            	
+                if (user.getText().equals(rs.getString("Account")) && password.getText().equals(rs.getString("Password"))) {
+                	if("经理".equals(rs.getString("Position"))) {                    //如果身份是经理则打开管理员界面
+                		try {
+        					MainW2 window1 = new MainW2();
+        					
+        				} catch (Exception f) {
+        					f.printStackTrace();
+        				}
+                	}
+                	else {
+                		try {                                                     //否则打开售货员界面
+        					MianW1 window2 = new MianW1();
+        					
+        				} catch (Exception b) {
+        					b.printStackTrace();
+        				}
+                	}
+                		
+                    
+                    login.dispose();
+                    flag=1;
+                    break;
+                } 
+                	
+
+            }
+            
+            if(flag==0)                                                             //如果找不到就显示账号或密码错误
+            	JOptionPane.showMessageDialog(null," 账号或者密码错误");
+        }catch(SQLException se){
+            se.printStackTrace();
+        }catch(Exception w){
+            w.printStackTrace();
+        }finally{
+
+        }
+    }
+}
+
+
+
diff --git a/surpermarket/MainW2.java b/surpermarket/MainW2.java
new file mode 100644
index 0000000000000000000000000000000000000000..5e8933ca7ef8fd0ad81f0f0a03ceda13ff2ea3ba
--- /dev/null
+++ b/surpermarket/MainW2.java
@@ -0,0 +1,95 @@
+package surpermarket;
+
+import java.awt.EventQueue;
+
+import javax.swing.JFrame;
+import javax.swing.JButton;
+import java.awt.Font;
+import java.awt.event.ActionListener;
+import java.awt.event.ActionEvent;
+
+public class MainW2 {
+
+	private JFrame frame;
+
+	/**
+	 * Launch the application.
+	 */
+	public static void main(String[] args) {
+		EventQueue.invokeLater(new Runnable() {
+			public void run() {
+				try {
+					MainW2 window = new MainW2();
+	
+				} catch (Exception e) {
+					e.printStackTrace();
+				}
+			}
+		});
+	}
+
+	/**
+	 * Create the application.
+	 */
+	public MainW2() {
+		initialize();
+	}
+
+	/**
+	 * Initialize the contents of the frame.
+	 */
+	private void initialize() {
+		frame = new JFrame();
+		frame.setTitle("\u7BA1\u7406\u7A97\u53E3");
+		frame.setBounds(100, 100, 812, 654);
+		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+		frame.getContentPane().setLayout(null);
+		frame.setVisible(true);
+		
+		JButton btnNewButton = new JButton("\u8D27\u7269\u64CD\u4F5C");
+		btnNewButton.addActionListener(new ActionListener() {
+			public void actionPerformed(ActionEvent e) {
+				Goodscomm window3=new Goodscomm();
+			}
+		});
+		btnNewButton.setFont(new Font("宋体", Font.PLAIN, 18));
+		btnNewButton.setBounds(31, 62, 131, 48);
+		frame.getContentPane().add(btnNewButton);
+		
+		JButton B_workcomm = new JButton("\u804C\u5DE5\u4FE1\u606F\u64CD\u4F5C");
+		B_workcomm.addActionListener(new ActionListener() {
+			public void actionPerformed(ActionEvent e) {
+				try {
+					Workercomm window1 = new Workercomm();                        // 职工信息管理窗口
+					
+				} catch (Exception f) {
+					f.printStackTrace();
+				}
+			}
+				
+			
+		});
+		B_workcomm.setFont(new Font("宋体", Font.PLAIN, 18));
+		B_workcomm.setBounds(279, 65, 179, 52);
+		frame.getContentPane().add(B_workcomm);
+		
+		JButton B_accountaomm = new JButton("\u8D26\u53F7\u5BC6\u7801\u64CD\u4F5C"); 
+		B_accountaomm.addActionListener(new ActionListener() {
+			public void actionPerformed(ActionEvent e) {
+				
+						try {
+							Accountcomm window = new Accountcomm();          //用户信息管理窗口
+							
+						} catch (Exception d) {
+							d.printStackTrace();
+						}
+					}
+				
+			
+	});
+		B_accountaomm.setFont(new Font("宋体", Font.PLAIN, 18));
+		B_accountaomm.setBounds(603, 46, 146, 92);
+		frame.getContentPane().add(B_accountaomm);
+	}
+
+}
diff --git a/surpermarket/MianW1.java b/surpermarket/MianW1.java
new file mode 100644
index 0000000000000000000000000000000000000000..3e355b361395005d9b51227438843d2c67f138bb
--- /dev/null
+++ b/surpermarket/MianW1.java
@@ -0,0 +1,130 @@
+package surpermarket;
+
+import java.awt.EventQueue;
+
+import javax.swing.JFrame;
+import javax.swing.JLabel;
+import java.awt.Font;
+import javax.swing.JButton;
+import javax.swing.JTextField;
+import java.awt.event.ActionListener;
+import java.util.Random;
+import java.awt.event.ActionEvent;
+import javax.swing.JTextArea;
+import javax.swing.SwingConstants;
+
+public class MianW1 {
+
+	private JFrame frame;
+	private JTextField T_itemNumber;
+	private JTextField T_itemNum;
+	Random random=new Random();
+
+	/**
+	 * Launch the application.
+	 */
+	public static void main(String[] args) {
+		EventQueue.invokeLater(new Runnable() {
+			public void run() {
+				try {
+					MianW1 window = new MianW1();
+					window.frame.setVisible(true);
+				} catch (Exception e) {
+					e.printStackTrace();
+				}
+			}
+		});
+	}
+
+	/**
+	 * Create the application.
+	 */
+	public MianW1() {
+		initialize();
+	}
+
+	/**
+	 * Initialize the contents of the frame.
+	 */
+	private void initialize() {
+		frame = new JFrame();
+		frame.setTitle("\u9500\u552E\u5458\u7A97\u53E3");
+		frame.setBounds(100, 100, 799, 534);
+		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+		frame.getContentPane().setLayout(null);
+		frame.setVisible(true);
+		
+		JTextArea textArea = new JTextArea();
+		textArea.setBounds(81, 12, 163, 27);
+		textArea.setEditable(false);
+		frame.getContentPane().add(textArea);
+		
+		
+		JLabel lblNewLabel = new JLabel("\u8BA2\u5355\u7F16\u53F7");
+		lblNewLabel.setFont(new Font("宋体", Font.PLAIN, 13));
+		lblNewLabel.setBounds(10, 10, 61, 29);
+		frame.getContentPane().add(lblNewLabel);
+		
+		JButton B_newOrder = new JButton("\u65B0\u5EFA\u8BA2\u5355");
+		B_newOrder.addActionListener(new ActionListener() {
+			public void actionPerformed(ActionEvent e) {
+				String string=String.valueOf(random.nextInt(10000));
+				textArea.setText(string);
+				
+			}
+		});
+		B_newOrder.setFont(new Font("宋体", Font.PLAIN, 14));//新建订单按钮
+		B_newOrder.setBounds(602, 12, 140, 45);
+		frame.getContentPane().add(B_newOrder);
+		
+		JLabel L_itemNumber = new JLabel("\u5546\u54C1\u7F16\u53F7");
+		L_itemNumber.setFont(new Font("宋体", Font.PLAIN, 18));
+		L_itemNumber.setBounds(123, 146, 82, 45);
+		frame.getContentPane().add(L_itemNumber);                          //商品编号标签以及输入框
+		
+		T_itemNumber = new JTextField();
+		T_itemNumber.setBounds(233, 146, 209, 34);
+		frame.getContentPane().add(T_itemNumber);
+		T_itemNumber.setColumns(10);
+		
+		JLabel L_itemNum = new JLabel("\u5546\u54C1\u6570\u91CF");
+		L_itemNum.setFont(new Font("宋体", Font.PLAIN, 18));
+		L_itemNum.setBounds(123, 228, 82, 45);
+		frame.getContentPane().add(L_itemNum);                              //商品数量标签以及输入框
+		
+		T_itemNum = new JTextField();
+		T_itemNum.setColumns(10);
+		T_itemNum.setBounds(233, 226, 209, 34);
+		frame.getContentPane().add(T_itemNum);
+		
+		JButton B_conCern = new JButton("\u786E\u5B9A");                    //确定按钮
+		B_conCern.addActionListener(new ActionListener() {
+			public void actionPerformed(ActionEvent e) {
+				
+				int number=Integer.parseInt(T_itemNum.getText());
+				try {
+					surpermarket.InsertCargosold ic =new InsertCargosold(textArea.getText(), T_itemNumber.getText(), number);
+				} catch (Exception e1) {
+					// TODO 自动生成的 catch 块
+					e1.printStackTrace();
+				}
+				T_itemNum.setText("");
+				T_itemNumber.setText("");
+			}
+		});
+		B_conCern.setFont(new Font("宋体", Font.PLAIN, 14));
+		B_conCern.setBounds(581, 398, 140, 45);
+		frame.getContentPane().add(B_conCern);
+		
+		JTextArea txtrTips = new JTextArea();
+		txtrTips.setEditable(false);
+		txtrTips.setFont(new Font("Monospaced", Font.PLAIN, 15));
+		txtrTips.setToolTipText("tips\uFF1A\u6BCF\u6B21\u9700\u70B9\u51FB\u65B0\u5EFA\u8BA2\u5355 \uFF0C \u7136\u540E\u81EA\u52A8\u751F\u6210\u968F\u673A\u8BA2\u5355\u53F7\uFF0C \u4E4B\u540E\u6DFB\u52A0\u5546\u54C1\u70B9\u51FB\u786E\u5B9A\uFF08\u53EA\u9700\u70B9\u51FB\u4E00\u6B21\uFF09\uFF0C\u5728\u8BA2\u5355\u53F7\u66F4\u65B0\u4E4B\u524D\u8F93\u5165\u7684\u5546\u54C1\u90FD\u4F1A\u5728\u6B64\u8BA2\u5355\u4E2D\u3002");
+		txtrTips.setRows(5);
+		txtrTips.setText("tips\uFF1A\u6BCF\u6B21\u9700\u70B9\u51FB\u65B0\u5EFA\u8BA2\u5355 \uFF0C \u7136\u540E\u4F1A\u81EA\u52A8\u751F\u6210\u968F\u673A\u8BA2\u5355\u53F7\uFF0C \u4E4B\u540E\r\n\u6DFB\u52A0\u5546\u54C1\u70B9\u51FB\u786E\u5B9A\uFF08 \u6DFB\u52A0\u6BCF\u79CD\u5546\u54C1\u53CA\u5176\u6570\u91CF\u53EA\u9700\u70B9\u51FB\u4E00\u6B21\uFF09\uFF0C\u5728\r\n\u8BA2\u5355\u53F7\u66F4\u65B0\u4E4B\u524D\u8F93\u5165\u7684\u5546\u54C1\u90FD\u4F1A\u5728\u6B64\u8BA2\u5355\u4E2D\u3002");
+		txtrTips.setBounds(26, 314, 461, 83);
+		frame.getContentPane().add(txtrTips);
+		
+		
+	}
+}
diff --git a/surpermarket/QueryALLAccount.java b/surpermarket/QueryALLAccount.java
new file mode 100644
index 0000000000000000000000000000000000000000..b76c5f5000d68ecb6195f7ea4e59361181595321
--- /dev/null
+++ b/surpermarket/QueryALLAccount.java
@@ -0,0 +1,101 @@
+package surpermarket;
+
+/***
+ * 该类用于查询全部账号密码权限信息
+
+ * 具体使用方法请参考下方主函数
+ */
+
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.Statement;
+import java.sql.ResultSet;
+import javax.swing.JOptionPane;
+
+
+public class QueryALLAccount{
+	
+	// 加载数据库驱动  com.mysql.jdbc.Driver
+    public static final String DBDRIVER = "com.mysql.cj.jdbc.Driver";
+    
+    // 获取mysql连接地址      
+    public static final String DBURL = "jdbc:mysql://localhost:3306/supermarket?&useSSL=false&allowPublicKeyRetrieval=true&serverTimezone=UTC";
+    
+    // 数据名称
+    public static final String DBUSER = "root";
+    
+    // 数据库密码
+    public static final String DBPASS = "00000000";
+
+    
+    
+    private String[] str = new String[60];             //查询结果集保存于此字符串数组
+    
+    public String[] getstr() {                           //向前端传递查询结果信息
+    	return this.str;
+    }
+    
+    
+    
+    public QueryALLAccount() throws Exception
+	{
+
+	        Connection conn = null;                // 数据的连接
+	        Statement pstmt = null;                // 数据库的操作
+	        ResultSet rs = null;
+	        
+	        String sql = "SELECT * FROM ACCOUNT";           //查询语句
+	        
+	        Class.forName(DBDRIVER);               //加载驱动程序
+	        
+        	conn = DriverManager.getConnection(DBURL,DBUSER,DBPASS);          //连接MySQL数据库时，要写上连接的用户名和密码
+	        pstmt = conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE);                                    //实例化statsment对象
+	        
+	        rs = pstmt.executeQuery(sql);               //执行数据库查询操作
+	        
+	        if(rs.next()==false)                      //判断账号密码表中是否有信息
+	        	
+	        	JOptionPane.showMessageDialog(null,"系统中没有账户密码信息！请先添加相关信息。");
+	        
+	        else {
+	        	rs.beforeFirst();               //跳转到结果集第一行的前一行
+	        	int i=0;
+		        while(rs.next()){                     //将查询结果保存到str字符串数组中
+		        	for(int j=0;j<3;j++) {
+		        		str[i*3+j] = new String();
+		        		str[i*3+j] = rs.getString(j+1);
+		        	}
+		        	i++;
+		        }
+		    }
+	        
+	        rs.close();                            //关闭结果集   
+	        pstmt.close();                          //关闭操作
+	        conn.close();                          //关闭数据库
+
+	}       
+
+    
+    //———————测试——————————
+    public static void main(String[] args) throws Exception{
+    	
+    	QueryALLAccount qs = new QueryALLAccount();           //在用户界面点击查询全体即可，无需获取输入框中信息
+    	
+    	int x=0;
+    	String[] str = qs.getstr();               //接收查询结果
+    	
+    	while(str[x]!=null) x=x+3;
+    	
+    	//循环输出查询结果中内容
+    	for(int i=0;i<x/3;i++) {
+    		String account = str[i*3+0];
+    		System.out.print("账号："+account+"\t");
+    		String password = str[i*3+1];
+    		System.out.print("密码："+password+"\t");
+    		String position = str[i*3+2];
+    		System.out.println("权限："+position+"\t");
+    	}
+    	
+    }
+    
+}
\ No newline at end of file
diff --git a/surpermarket/QueryALLStaff.java b/surpermarket/QueryALLStaff.java
new file mode 100644
index 0000000000000000000000000000000000000000..0506254a4332c8dee1de5f2c6c33cff531d567e6
--- /dev/null
+++ b/surpermarket/QueryALLStaff.java
@@ -0,0 +1,103 @@
+package surpermarket;
+
+/***
+ * 该类用于查询所有职工信息
+ * 
+ * 具体使用方法请参考下方主函数
+ */
+
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.Statement;
+import java.sql.ResultSet;
+import javax.swing.JOptionPane;
+
+
+public class QueryALLStaff
+{
+	
+	// 加载数据库驱动  com.mysql.jdbc.Driver
+    public static final String DBDRIVER = "com.mysql.cj.jdbc.Driver";
+    
+    // 获取mysql连接地址      
+    public static final String DBURL = "jdbc:mysql://localhost:3306/supermarket?&useSSL=false&allowPublicKeyRetrieval=true&serverTimezone=UTC";
+    
+    // 数据名称
+    public static final String DBUSER = "root";
+    
+    // 数据库密码
+    public static final String DBPASS = "00000000";
+
+    
+    
+    private String[] str = new String[80];             //查询结果集保存于此字符串数组
+    
+    public String[] getstr() {               //向前端传递查询结果信息
+    	return this.str;
+    }
+    
+    
+    
+    public QueryALLStaff() throws Exception
+	{
+    	
+	        Connection conn = null;                // 数据的连接
+	        Statement pstmt = null;                // 数据库的操作
+	        ResultSet rs = null;
+	        
+	        String sql = "SELECT Sno,Sname,Sposition,Sphone FROM STAFF";
+	        
+	        Class.forName(DBDRIVER);               //加载驱动程序
+	        
+        	conn = DriverManager.getConnection(DBURL,DBUSER,DBPASS);          //连接MySQL数据库时，要写上连接的用户名和密码
+	        pstmt = conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE);                                    //实例化statsment对象
+	        
+	        rs = pstmt.executeQuery(sql);               //执行数据库查询操作
+	        
+	        if(rs.next()==false)                         //判断职工表中是否有信息
+	        	JOptionPane.showMessageDialog(null,"系统中还没有员工信息！请先添加员工相关信息。");
+	        
+	        else {
+	        	rs.beforeFirst();
+	        	int i=0;
+		        while(rs.next()){                        //将查询结果保存到字符串数组中
+		        	for(int j=0;j<4;j++) {
+		        		str[i*4+j] = new String();
+		        		str[i*4+j] = rs.getString(j+1);
+		        	}
+		        	i++;
+		        }
+		    }
+	
+	        rs.close();                            //关闭结果集   
+	        pstmt.close();                          //关闭操作
+	        conn.close();                          //关闭数据库
+	
+	}       
+
+    
+    //———————测试——————————
+    public static void main(String[] args) throws Exception{
+    	
+    	QueryALLStaff qs = new QueryALLStaff();          //点击用户界面查询全体即可，不需要获取输入框中信息
+    	
+    	int x=0;
+    	String[] str = qs.getstr();          //接受查询结果
+    	
+    	while(str[x]!=null) x=x+4;
+    	
+    	//循环输出结果集中内容
+    	for(int i=0;i<x/4;i++) {
+    		String sno = str[i*4+0];
+    		System.out.print("编号："+sno+"\t");
+    		String sname = str[i*4+1];
+    		System.out.print("姓名："+sname+"\t");
+    		String sposition = str[i*4+2];
+    		System.out.print("权限："+sposition+"\t");
+    		String sphone = str[i*4+3];
+    		System.out.println("电话："+sphone+"\t");
+    	}
+    	
+    }
+    
+}
\ No newline at end of file
diff --git a/surpermarket/QueryAccount.java b/surpermarket/QueryAccount.java
new file mode 100644
index 0000000000000000000000000000000000000000..772d7cc76a7c20e00efcf4d505a02e1751239766
--- /dev/null
+++ b/surpermarket/QueryAccount.java
@@ -0,0 +1,125 @@
+package surpermarket;
+
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.Statement;
+import java.sql.ResultSet;
+import javax.swing.JOptionPane;
+
+
+public class QueryAccount{
+	
+	// 加载数据库驱动  com.mysql.jdbc.Driver
+    public static final String DBDRIVER = "com.mysql.cj.jdbc.Driver";
+    
+    // 获取mysql连接地址      
+    public static final String DBURL = "jdbc:mysql://localhost:3306/supermarket?&useSSL=false&allowPublicKeyRetrieval=true&serverTimezone=UTC";
+    
+    // 数据名称
+    public static final String DBUSER = "root";
+    
+    // 数据库密码
+    public static final String DBPASS = "00000000";
+
+    
+    
+    private String[] str = new String[3072];             //查询结果集保存于此字符串数组
+    
+    public String[] getstr() {               //向前端传递查询结果信息
+    	return this.str;
+    }
+    
+    public QueryAccount(String account,String password,String position) throws Exception
+	{
+    	//判断查询条件
+    	if(account==null&&password==null&&position==null) {
+    		JOptionPane.showMessageDialog(null,"未填入相关查询信息，无法为您服务！");
+    	}
+    	else { 
+    		
+	        String sql = null;                 //定义sql查询语句
+	        
+	        if(account==null) {
+	        	if(password==null) {
+	        		if(position!=null)
+	        			sql = "SELECT * FROM account WHERE Position=" + "\'" + position + "\'";
+	        	}
+	        	else {
+	        		if(position==null)
+	        			sql = "SELECT * FROM accountT WHERE Password=" + "\'" + password + "\'";
+	        		else
+	        			sql = "SELECT * FROM account WHERE Password= " + "\'" + password + "\'" + " AND Position=" + "\'" + position + "\'";
+	        	}
+	        }
+	        else {
+	        	if(password==null) {
+	        		if(position==null)
+	        			sql = "SELECT * FROM account WHERE Account=" + "\'" + account + "\'";
+	        		else
+	        			sql = "SELECT * FROM account WHERE Position=" + "\'" + position + "\'" + " AND Account=" + "\'" + account + "\'";
+	        	}
+	        	else {
+	        		if(position==null)
+	        			sql = "SELECT * FROM account WHERE Password=" + "\'" + password + "\'" + " AND Account=" + "\'" + account + "\'";
+	        		else
+	        			sql = "SELECT * FROM account WHERE Password= " + "\'" + password + "\'" + " AND Position=" + "\'" + position + "\'" + " AND Account=" + "\'" + account + "\'";
+	        	}
+	        }
+	        
+	        Connection conn = null;                // 数据的连接
+	        Statement pstmt = null;                // 数据库的操作
+	        ResultSet rs = null;
+	        
+	        Class.forName(DBDRIVER);               //加载驱动程序
+	        
+        	conn = DriverManager.getConnection(DBURL,DBUSER,DBPASS);          //连接MySQL数据库时，要写上连接的用户名和密码
+	        pstmt = conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE);                                    //实例化statsment对象
+	        
+	        rs = pstmt.executeQuery(sql);               //执行数据库查询操作
+	        
+	        if(rs.next()==false)           //判断能否查询到信息
+	        	JOptionPane.showMessageDialog(null,"系统中没有该信息对应的账户密码信息！");
+	        
+	        else {
+	        	rs.beforeFirst();              //跳转到结果集第一行的前一行
+	        	int i=0;
+		        while(rs.next()){                     //将结果保存到字符串数组中
+		        	for(int j=0;j<3;j++) {
+		        		str[i*3+j] = new String();
+		        		str[i*3+j] = rs.getString(j+1);
+		        	}
+		        	i++;
+		        }
+		    }
+
+	        rs.close();                            //关闭结果集   
+	        pstmt.close();                          //关闭操作
+	        conn.close();                          //关闭数据库
+    	}
+	
+	}       
+
+    
+    //———————测试——————————
+    public static void main(String[] args) throws Exception{
+    	
+    	QueryAccount qs = new QueryAccount(null,null,"经理");       //输入框不可以全为空
+    	
+    	int x=0;
+    	String[] str = qs.getstr();             //接收查询结果字符串
+    	
+    	while(str[x]!=null) x=x+3;
+    	
+    	//循环输出结果集中内容
+    	for(int i=0;i<x/3;i++) {
+    		String account = str[i*3+0];
+    		System.out.print("账号："+account+"\t");
+    		String password = str[i*3+1];
+    		System.out.print("密码："+password+"\t");
+    		String position = str[i*3+2];
+    		System.out.println("权限："+position+"\t");
+    	}
+    	
+    }
+    
+}
\ No newline at end of file
diff --git a/surpermarket/QueryCargo.java b/surpermarket/QueryCargo.java
new file mode 100644
index 0000000000000000000000000000000000000000..620eba33b57770652338d593abf06d6dffc74ac8
--- /dev/null
+++ b/surpermarket/QueryCargo.java
@@ -0,0 +1,454 @@
+package surpermarket;
+
+/***
+ * 该类用于查询货物信息信息
+
+ * 具体使用方法请参考下方主函数
+ */
+
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.Statement;
+import java.sql.ResultSet;
+import javax.swing.JOptionPane;
+
+
+public class QueryCargo{
+	
+	// 加载数据库驱动  com.mysql.jdbc.Driver
+    public static final String DBDRIVER = "com.mysql.cj.jdbc.Driver";
+    
+    // 获取mysql连接地址      
+    public static final String DBURL = "jdbc:mysql://localhost:3306/supermarket?&useSSL=false&allowPublicKeyRetrieval=true&serverTimezone=UTC";
+    
+    // 数据名称
+    public static final String DBUSER = "root";
+    
+    // 数据库密码
+    public static final String DBPASS = "00000000";
+
+    
+    
+    private String stb = new String();             //货物大类编号
+    private String[] stm = new String[120];       //查询货物小类数据库保存结果
+    private String[] str = new String[1200];       //查询货物数据库保存结果
+    
+    public String getstb() {                          //向前端传递查询结果信息
+    	return this.stb;
+    }
+    public String[] getstm() {                          //向前端传递查询结果信息
+    	return this.stm;
+    }
+    public String[] getstr() {                          //向前端传递查询结果信息
+    	return this.str;
+    }
+    
+
+    public QueryCargo(String cbname,String csname,String cname) throws Exception
+	{
+    	
+    	//判断查询条件
+    	if(cbname==null&&csname==null&&cname==null) {
+    		JOptionPane.showMessageDialog(null,"未填入相关查询信息，无法为您服务！");
+    	}
+    	else { 
+    		
+    		Connection conn = null;                // 数据的连接
+	        Statement pstmt = null;                // 数据库的操作
+	        ResultSet rs = null;
+
+	        Class.forName(DBDRIVER);               //加载驱动程序
+	        
+        	conn = DriverManager.getConnection(DBURL,DBUSER,DBPASS);          //连接MySQL数据库时，要写上连接的用户名和密码
+	        pstmt = conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE);
+	        
+	        String sql = null;                 //定义sql查询语句
+	        
+	        if(cbname==null) {
+	        	if(csname==null) {
+	        		
+	        		if(cname!=null) {              //只填入货物名
+	        			sql = "SELECT * FROM CARGO WHERE Cname=" + "\'" + cname + "\'";
+	        			
+	        			rs = pstmt.executeQuery(sql);               //执行数据库查询操作
+	        			
+	        			if(rs.next()==false) {               //判断该货物是否存在
+	        				JOptionPane.showMessageDialog(null,"系统中无此货物信息！");
+	        			}
+	        			else {                //保存货物数据库查询结果
+	        				rs.beforeFirst();                //跳转到结果集第一行的前一行
+	        	        	int i=0;
+	        		        while(rs.next()){                     //将结果保存到字符串数组中
+	        		        	for(int j=0;j<5;j++) {
+	        		        		str[i*5+j] = new String();
+	        		        		str[i*5+j] = rs.getString(j+1);
+	        		        	}
+	        		        	i++;
+	        		        }
+	        			}
+	        			//rs.close();                            //关闭结果集   
+	        	        pstmt.close();                          //关闭操作
+	        	        conn.close();                          //关闭数据库
+	        		}
+	        		
+	        	}
+	        	
+	        	else {        //填入小类名
+	        		
+        		    if(cname==null) {               //只填入小类名
+	        			
+        		    	sql = "SELECT * FROM CARGOSAMLLTYPE WHERE Csname=" + "\'" + csname + "\'";
+            			
+            			rs = pstmt.executeQuery(sql);               //执行数据库查询操作
+            			
+            			if(rs.next()==false) {         //判断是否存在该小类
+            				JOptionPane.showMessageDialog(null,"系统中没有该小类信息，请先进行添加该小类！");
+            				//rs.close();                            //关闭结果集   
+		        	        pstmt.close();                          //关闭操作
+		        	        conn.close();                          //关闭数据库
+            			}
+            			else {                 //保存小类数据库查询结果
+            				rs.beforeFirst();                //跳转到结果集第一行的前一行
+            	        	int i=0;
+            		        while(rs.next()){                     //将结果保存到字符串数组中
+            		        	for(int j=0;j<3;j++) {
+            		        		stm[i*3+j] = new String();
+            		        		stm[i*3+j] = rs.getString(j+1);
+            		        	}
+            		        	i++;
+            		        }
+            		        //rs.close();                            //关闭结果集
+        		    	
+	        		        ResultSet rd = null;
+	        		        
+	        		        sql = "SELECT * FROM CARGO WHERE Csno=" + "\'" + stm[0] + "\'";
+	        		        
+	        		        rd = pstmt.executeQuery(sql);               //执行数据库查询操作
+	        		        
+	        		        if(rd.next()==false) {         //判断是否存在该小类对应的商品
+		        				JOptionPane.showMessageDialog(null,"尚未为该小类添加货物信息！没有该小类货物。");
+		        			}
+		        			else {                 //保存货物数据库查询结果
+		        				rd.beforeFirst();                //跳转到结果集第一行的前一行
+		        	        	i=0;
+		        		        while(rd.next()){                     //将结果保存到字符串数组中
+		        		        	for(int j=0;j<5;j++) {
+		        		        		str[i*5+j] = new String();
+		        		        		str[i*5+j] = rd.getString(j+1);
+		        		        	}
+		        		        	i++;
+		        		        }
+		        			}
+	        		        rd.close();                            //关闭结果集   
+		        	        pstmt.close();                          //关闭操作
+		        	        conn.close();                          //关闭数据库
+	        			}
+        		    }
+        		    
+	        		else {                //输入小类名和商品名
+	        			
+	        			sql = "SELECT * FROM CARGOSAMLLTYPE WHERE Csname=" + "\'" + csname + "\'";
+            			
+            			rs = pstmt.executeQuery(sql);               //执行数据库查询操作
+            			
+            			if(rs.next()==false) {         //判断是否存在该小类
+            				JOptionPane.showMessageDialog(null,"系统中没有该小类信息，请先进行添加该小类！");
+            				rs.close();                            //关闭结果集   
+		        	        pstmt.close();                          //关闭操作
+		        	        conn.close();                          //关闭数据库
+            			}
+            			else {
+            				sql = "SELECT * FROM CARGO WHERE Cname= " + "\'" + cname + "\'" + " AND Csno=" + "\'" + rs.getString(1) + "\'";
+            				
+            				ResultSet rd = pstmt.executeQuery(sql);               //执行数据库查询操作
+            				
+            				if(rd.next()==false) {
+            					JOptionPane.showMessageDialog(null,"此小类不包含该商品该商品，请先将该商品添加到此小类中！");
+            				}
+            				else {
+            					rd.beforeFirst();                //跳转到结果集第一行的前一行
+		        	        	int i=0;
+		        		        while(rd.next()){                     //将结果保存到字符串数组中
+		        		        	for(int j=0;j<5;j++) {
+		        		        		str[i*5+j] = new String();
+		        		        		str[i*5+j] = rd.getString(j+1);
+		        		        	}
+		        		        	i++;
+		        		        }
+            				}
+            				//rs.close();                            //关闭结果集
+        					rd.close();
+		        	        pstmt.close();                          //关闭操作
+		        	        conn.close();
+            			}  
+        			}
+	        	}
+	        }
+	        else {               //输入大类名
+	        	if(csname==null) {
+	        		if(cname==null) {          //仅仅输入大类名
+	        			
+	        			sql = "SELECT * FROM CARGOBIGTYPE WHERE Cbname="  + "\'" + cbname + "\'";
+	        			
+	        			rs = pstmt.executeQuery(sql);               //执行数据库查询操作
+	        			
+	        			if(rs.next()==false) {          //判断是否存在该大类
+	        				JOptionPane.showMessageDialog(null,"无此大类信息！");
+	        				
+	        			}
+	        			else {
+	        				stb = rs.getString(1);
+	        				
+	        				sql = "SELECT * FROM CARGOSAMLLTYPE WHERE Cbno="  + "\'" + stb + "\'";
+	        				
+	        				rs.close();
+	        				ResultSet rd = pstmt.executeQuery(sql);               //执行数据库查询操作
+	        				
+	        				if(rd.next()==false) {       //判断该大类是否存在小类
+	        					JOptionPane.showMessageDialog(null,"此大类中无小类信息，请先向该大类中添加小类！");
+	        				}
+	        				else {
+	        					
+	        					rd.beforeFirst();                //跳转到结果集第一行的前一行
+		        	        	int i=0;
+		        		        while(rd.next()){                     //将结果保存到字符串数组中
+		        		        	for(int j=0;j<3;j++) {
+		        		        		stm[i*3+j] = new String();
+		        		        		stm[i*3+j] = rd.getString(j+1);
+		        		        	}
+		        		        	i++;
+		        		        }
+		        		        
+		        		        int x = 0;
+		        		        sql = "SELECT * FROM CARGO WHERE Csno IN (" + "\'" + stm[x] + "\'";
+		        		        x = x + 3;
+		        		        while(stm[x]!=null) {
+		        		        	sql = sql + "," + "\'" + stm[x] + "\'";
+		        		        	x = x + 3;
+		        		        }
+		        		        sql = sql + ")";
+		        		        
+		        		        ResultSet rf = pstmt.executeQuery(sql);               //执行数据库查询操作
+		        		        
+		        		        if(rf.next()==false) {    //判断是否含有货物信息
+		        		        	JOptionPane.showMessageDialog(null,"此大类所含小类均未含有货物信息，请先向该大类中的小类添加货物信息！");
+		        		        }
+		        		        else {
+		        		        	rf.beforeFirst();                //跳转到结果集第一行的前一行
+			        	        	int a=0;
+			        		        while(rf.next()){                     //将结果保存到字符串数组中
+			        		        	for(int j=0;j<5;j++) {
+			        		        		str[a*5+j] = new String();
+			        		        		str[a*5+j] = rf.getString(j+1);
+			        		        	}
+			        		        	a++;
+			        		        }
+		        		        }
+		        		        rf.close();
+	        				}
+	        				rd.close();
+	        			}
+	        		}
+	        		else {             //输入大类名和货物名
+	        			
+	        			sql = "SELECT * FROM CARGOBIGTYPE WHERE Cbname=" + "\'" + cbname + "\'";
+	        			
+	        			rs = pstmt.executeQuery(sql);               //执行数据库查询操作
+	        			
+	        			if(rs.next()==false) {
+	        				JOptionPane.showMessageDialog(null,"该大类不存在！");
+	        			}
+	        		
+	        			else {
+	        				String sq = rs.getString(1);
+	        				sql = "SELECT * FROM CARGO WHERE Cname=" + "\'" + cname + "\'";
+		        			
+		        			ResultSet rd = pstmt.executeQuery(sql);               //执行数据库查询操作
+		        			
+		        			if(rd.next()==false) {          //判断是否存在该小类
+		        				JOptionPane.showMessageDialog(null,"该货物不存在！");
+		        			}
+		        			else {
+		        				
+		        				rd.beforeFirst();                //跳转到结果集第一行的前一行
+				        	        int a=0;
+				        		    while(rd.next()){                     //将结果保存到字符串数组中
+				        		        for(int j=0;j<5;j++) {
+				        		        	str[a*5+j] = new String();
+				        		        	str[a*5+j] = rd.getString(j+1);
+				        		        }
+				        		        a++;
+				        		    }
+		        				
+		        				sql = "SELECT * FROM CARGOSAMLLTYPE WHERE Cbno=" + "\'" + sq + "\'" + " AND Csno=" + "\'" + str[4] + "\'";
+		        				
+		        				ResultSet rf = pstmt.executeQuery(sql);               //执行数据库查询操作
+		        				
+		        				if(rf.next()==false) {
+		        					JOptionPane.showMessageDialog(null,"该货物不属于该大类！");
+		        					this.str=null;
+		        				}
+		        				
+		        				rf.close();
+		        			}
+		        			rd.close();
+	        			}
+	        			
+	        		}
+	        	}
+	        	else {            //输入大类名和小类名
+	        		if(cname==null) {
+	        			sql = "SELECT * FROM CARGOBIGTYPE WHERE Cbname=" + "\'" + cbname + "\'";
+	        			
+	        			rs = pstmt.executeQuery(sql);               //执行数据库查询操作
+	        			
+	        			if(rs.next()==false) {          //判断是否存在该大类
+	        				JOptionPane.showMessageDialog(null,"无此大类信息！");
+	        			}
+	        			else {
+	        				
+	        				sql = "SELECT * FROM CARGOSAMLLTYPE WHERE Csname=" + "\'" + csname + "\'" + " AND Cbno=" + "\'" + rs.getString(1) + "\'"; 
+	        				
+	        				ResultSet rd = pstmt.executeQuery(sql);               //执行数据库查询操作
+	        				
+	        				if(rd.next()==false) {
+	        					JOptionPane.showMessageDialog(null,"该大类中无此小类信息，请先向该大类中添加此小类！");
+	        				}
+	        				else {
+	        					rd.beforeFirst();                //跳转到结果集第一行的前一行
+		        	        	int i=0;
+		        		        while(rd.next()){                     //将结果保存到字符串数组中
+		        		        	for(int j=0;j<3;j++) {
+		        		        		stm[i*3+j] = new String();
+		        		        		stm[i*3+j] = rd.getString(j+1);
+		        		        	}
+		        		        	i++;
+		        		        }
+		        		       
+		        		        sql = "SELECT * FROM CARGO WHERE Csno =" + "\'" + stm[0] + "\'";
+		        		        
+		        		        ResultSet rf = pstmt.executeQuery(sql);               //执行数据库查询操作
+		        		        
+		        		        if(rf.next()==false) {    //判断是否含有货物信息
+		        		        	JOptionPane.showMessageDialog(null,"该大类所含的此小类未含有货物信息，请先向此小类添加货物信息！");
+		        		        }
+		        		        else {
+		        		        	rf.beforeFirst();                //跳转到结果集第一行的前一行
+			        	        	int a=0;
+			        		        while(rf.next()){                     //将结果保存到字符串数组中
+			        		        	for(int j=0;j<5;j++) {
+			        		        		str[a*5+j] = new String();
+			        		        		str[a*5+j] = rf.getString(j+1);
+			        		        	}
+			        		        	a++;
+			        		        }
+		        		        }
+		        		        rd.close();
+		        		        rf.close();
+	        				}
+	        			}
+	        		}
+	        		else {                //输入大类名，小类名和商品名
+	        			
+	        			sql = "SELECT * FROM CARGOBIGTYPE WHERE Cbname= " + "\'" + cbname + "\'";
+	        			
+	        			rs = pstmt.executeQuery(sql);               //执行数据库查询操作
+	        			
+	        			if(rs.next()==false) {
+	        				JOptionPane.showMessageDialog(null,"无此大类信息！");
+	        			}
+	        			else {
+	        				sql = "SELECT * FROM CARGOSAMLLTYPE WHERE Csname=" + "\'" + csname + "\'" + " AND Cbno=" + "\'" + rs.getString(1) + "\'"; 
+	        				
+	        				ResultSet rd = pstmt.executeQuery(sql);               //执行数据库查询操作
+	        				
+	        				if(rd.next()==false) {
+	        					JOptionPane.showMessageDialog(null,"该大类中无此小类信息，请先向该大类中添加此小类！");
+	        				}
+	        				else {
+	        					sql = "SELECT * FROM CARGO WHERE Cname =" + "\'" + cname + "\'" + " AND Csno=" + "\'" + rd.getString(1) + "\'";
+		        		        
+		        		        ResultSet rf = pstmt.executeQuery(sql);               //执行数据库查询操作
+		        		        
+		        		        if(rf.next()==false) {    //判断是否含有货物信息
+		        		        	JOptionPane.showMessageDialog(null,"该大类所包含的该小类没有此货物信息，请先添加该货物到此小类！");
+		        		        }
+		        		        else {
+		        		        	rf.beforeFirst();                //跳转到结果集第一行的前一行
+			        	        	int a=0;
+			        		        while(rf.next()){                     //将结果保存到字符串数组中
+			        		        	for(int j=0;j<5;j++) {
+			        		        		str[a*5+j] = new String();
+			        		        		str[a*5+j] = rf.getString(j+1);
+			        		        	}
+			        		        	a++;
+			        		        }
+		        		        }
+		        		        rf.close();
+	        				}
+	        				rd.close();
+	        			}
+	        		}
+	        	}
+	        }
+	      
+	        rs.close();                            //关闭结果集   
+	        pstmt.close();                          //关闭操作
+	        conn.close();                          //关闭数据库
+    	}
+	
+	}       
+
+    
+    //———————测试——————————
+    public static void main(String[] args) throws Exception{
+    	
+    	QueryCargo qs = new QueryCargo(null,"饮料类",null);       //输入框不可以全为空
+    	
+    	int x=0;
+    	
+    	String stb = qs.getstb();             //接收大类编号
+    	String[] stm = qs.getstm();           //接收商品小类数据库查询结果
+    	String[] str = qs.getstr();           //接收商品数据库查询结果
+    	
+    	
+    	System.out.println("货物大类编号：" + stb);
+    	System.out.println("-------------------------------");
+    	
+    	
+    	while(stm[x]!=null) x=x+3;
+    	
+    	//循环输出结果集中内容
+    	System.out.println("货物小类信息：");
+    	for(int i=0;i<x/3;i++) {
+    		String account = stm[i*3+0];
+    		System.out.print("小类编号："+account+"\t");
+    		String password = stm[i*3+1];
+    		System.out.print("小类名字："+password+"\t");
+    		String position = stm[i*3+2];
+    		System.out.println("大类编号："+position+"\t");
+    	}
+    	System.out.println("-------------------------------");
+    	
+    	x=0;
+    	while(str[x]!=null) x=x+5;
+    	
+    	//循环输出结果集中内容
+    	System.out.println("货物信息：");
+    	for(int i=0;i<x/5;i++) {
+    		String account = str[i*5+0];
+    		System.out.print("货物编号："+account+"\t");
+    		String password = str[i*5+1];
+    		System.out.print("货物名："+password+"\t");
+    		String position = str[i*5+2];
+    		System.out.print("货物价格："+position+"\t");
+    		String account1 = str[i*5+3];
+    		System.out.print("货物数量："+account1+"\t");
+    		String account2 = str[i*5+4];
+    		System.out.println("小类编号："+account2+"\t");
+    	}
+    	System.out.println("-------------------------------");
+    	
+    }
+    
+}
\ No newline at end of file
diff --git a/surpermarket/QueryStaff.java b/surpermarket/QueryStaff.java
new file mode 100644
index 0000000000000000000000000000000000000000..8adc4411c9f54ec951499698f4d8426b1fc816a3
--- /dev/null
+++ b/surpermarket/QueryStaff.java
@@ -0,0 +1,178 @@
+package surpermarket;
+
+/***
+ * 该类用于查询部分职工信息
+
+ * 具体使用方法请参考下方主函数
+ */
+
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.Statement;
+import java.sql.ResultSet;
+import javax.swing.JOptionPane;
+
+
+public class QueryStaff
+{
+	
+	// 加载数据库驱动  com.mysql.jdbc.Driver
+    public static final String DBDRIVER = "com.mysql.cj.jdbc.Driver";
+    
+    // 获取mysql连接地址      
+    public static final String DBURL = "jdbc:mysql://localhost:3306/supermarket?&useSSL=false&allowPublicKeyRetrieval=true&serverTimezone=UTC";
+    
+    // 数据名称
+    public static final String DBUSER = "root";
+    
+    // 数据库密码
+    public static final String DBPASS = "00000000";
+
+    
+    
+    private String[] str = new String[40];             //查询结果集保存于此字符串数组
+    
+    public String[] getstr() {               //向前端传递查询结果信息
+    	return this.str;
+    }
+    
+    
+    
+    public QueryStaff(String sno,String sname,String sposition,String sphone) throws Exception
+	{
+    	//判断查询条件
+    	if(sno==null&&sname==null&&sposition==null&&sphone==null) {
+    		JOptionPane.showMessageDialog(null,"未填入相关查询信息，无法为您服务！");
+    	}
+    	else { 
+    		
+	        String sql = null;
+	        
+	        if(sno==null) {
+	        	if(sname==null) {
+	        		if(sposition==null) {
+	        			if(sphone!=null) sql = "SELECT * FROM STAFF WHERE Sphone=" + "\'" + sphone + "\'";
+	        		}
+	        		else {
+	        			if(sphone==null) {
+	        				sql = "SELECT * FROM STAFF WHERE Sposition= " + "\'" + sposition + "\'";
+	        			}
+	        			else {
+	        				sql = "SELECT * FROM STAFF WHERE Sposition=" + "\'" + sposition+ "\'" + " AND Sphone=" + "\'" + sphone + "\'";
+	        			}
+	        		}
+	        	}
+	        	else {
+	        		if(sposition==null) {
+	        			if(sphone==null) sql = "SELECT * FROM STAFF WHERE Sname=" + "\'" + sname + "\'";
+	        			else {
+	        				sql = "SELECT * FROM STAFF WHERE Sname=" + "\'" + sname + "\'" + " AND Sphone=" + "\'" + sphone + "\'";
+	        			}
+	        		}
+	        		else {
+	        			if(sphone==null) {
+	        				sql = "SELECT * FROM STAFF WHERE Sname= " + "\'" + sname + "\'" + " AND Sposition=" + "\'" + sposition + "\'";
+	        			}
+	        			else {
+	        				sql = "SELECT * FROM STAFF WHERE Sname= " + "\'" + sname + "\'" + " AND Sposition=" + "\'" + sposition + "\'" + " AND Sphone=" + "\'" + sphone + "\'";
+	        			}
+	        		}
+	        	}
+	        }
+	        else {
+	        	if(sname==null) {
+	        		if(sposition==null) {
+	        			if(sphone==null) {
+	        				sql = "SELECT * FROM STAFF WHERE Sno=" + "\'" + sno + "\'";
+	        			}
+	        			else {
+	        				sql = "SELECT * FROM STAFF WHERE Sphone=" + "\'" + sphone + "\'" + " AND Sno=" + "\'" + sno + "\'";
+	        			}
+	        		}
+	        		else {
+	        			if(sphone==null) {
+	        				sql = "SELECT * FROM STAFF WHERE Sposition= " + "\'" + sposition + "\'" + " AND Sno=" + "\'" + sno + "\'";
+	        			}
+	        			else {
+	        				sql = "SELECT * FROM STAFF WHERE Sposition=" + "\'" + sposition+ "\'" + " AND Sphone=" + "\'" + sphone + "\'" + " AND Sno=" + "\'" + sno + "\'";
+	        			}
+	        		}
+	        	}
+	        	else {
+	        		if(sposition==null) {
+	        			if(sphone==null) sql = "SELECT * FROM STAFF WHERE Sname=" + "\'" + sname + "\'" + " AND Sno=" + "\'" + sno + "\'";
+	        			else {
+	        				sql = "SELECT * FROM STAFF WHERE Sname=" + "\'" + sname + "\'" + " AND Sphone=" + "\'" + sphone + "\'" + " AND Sno=" + "\'" + sno + "\'";
+	        			}
+	        		}
+	        		else {
+	        			if(sphone==null) {
+	        				sql = "SELECT * FROM STAFF WHERE Sname= " + "\'" + sname + "\'" + " AND Sposition=" + "\'" + sposition + "\'" + " AND Sno=" + "\'" + sno + "\'";
+	        			}
+	        			else {
+	        				sql = "SELECT * FROM STAFF WHERE Sname= " + "\'" + sname + "\'" + " AND Sposition=" + "\'" + sposition + "\'" + " AND Sphone=" + "\'" + sphone + "\'" + " AND Sno=" + "\'" + sno + "\'";
+	        			}
+	        		}
+	        	}
+	        }
+	        
+	        Connection conn = null;                // 数据的连接
+	        Statement pstmt = null;                // 数据库的操作
+	        ResultSet rs = null;
+	        
+	        Class.forName(DBDRIVER);               //加载驱动程序
+	        
+        	conn = DriverManager.getConnection(DBURL,DBUSER,DBPASS);          //连接MySQL数据库时，要写上连接的用户名和密码
+	        pstmt = conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE);                                    //实例化statsment对象
+	        
+	        rs = pstmt.executeQuery(sql);               //执行数据库查询操作
+	        
+	        if(rs.next()==false) {            //判断是否查询到所需信息
+	        	
+	        	JOptionPane.showMessageDialog(null,"系统中没有该信息对应的员工信息！");
+	        }
+	        else {
+	        	rs.beforeFirst();
+	        	int i=0;
+		        while(rs.next()){                      //将查询结果保存在字符串数组中
+		        	for(int j=0;j<4;j++) {
+		        		str[i*4+j] = new String();
+		        		str[i*4+j] = rs.getString(j+1);
+		        	}
+		        	i++;
+		        }
+		    }
+
+	        rs.close();                            //关闭结果集   
+	        pstmt.close();                          //关闭操作
+	        conn.close();                          //关闭数据库
+    	}
+	
+	}       
+
+    
+    //———————测试——————————
+    public static void main(String[] args) throws Exception{
+    	
+    	QueryStaff qs = new QueryStaff(null,null,"售货员",null);     //输入框信息不可以全为空
+    	
+    	int x=0;
+    	String[] str = qs.getstr();            //接收查询结果
+    	
+    	while(str[x]!=null) x=x+4;
+    	
+    	//循环输出结果集中内容
+    	for(int i=0;i<x/4;i++) {
+    		String sno = str[i*4+0];
+    		System.out.print("编号："+sno+"\t");
+    		String sname = str[i*4+1];
+    		System.out.print("姓名："+sname+"\t");
+    		String sposition = str[i*4+2];
+    		System.out.print("权限："+sposition+"\t");
+    		String sphone = str[i*4+3];
+    		System.out.println("电话："+sphone+"\t");
+    	}
+    	
+    }
+    
+}
\ No newline at end of file
diff --git a/surpermarket/Query_Enter_Exit_Cargo.java b/surpermarket/Query_Enter_Exit_Cargo.java
new file mode 100644
index 0000000000000000000000000000000000000000..a662b8448b43725129839510fa7cb12d430c116d
--- /dev/null
+++ b/surpermarket/Query_Enter_Exit_Cargo.java
@@ -0,0 +1,176 @@
+package surpermarket;
+
+import java.sql.Connection;
+
+import java.sql.DriverManager;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.sql.Statement;
+import java.text.ParseException;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import javax.swing.JOptionPane;
+
+public class Query_Enter_Exit_Cargo {
+
+	private String[] str = new String[100]; // 保存查询结果
+
+	public String[] getstr() { // 向前端传递查询结果信息
+		return this.str;
+	}
+
+	public Query_Enter_Exit_Cargo(String cargo_Name, String start_Time, String end_Time) {
+		// TODO Auto-generated constructor stub
+		if (cargo_Name == null || start_Time == null || end_Time == null) {
+			JOptionPane.showMessageDialog(null, "查询信息未填写完整，无法为您服务！");
+			return;
+		}
+
+		SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
+		Date date1 = new Date_Change().tryParse(start_Time);
+		Date date2 = new Date_Change().tryParse(end_Time);
+		if (date1 == null || date2 == null) {
+			JOptionPane.showMessageDialog(null, "输入日期格式错误！");
+			return;
+		}
+
+		if (date2.getTime() < date1.getTime()) { // 比较开始日期和结束日期
+			JOptionPane.showMessageDialog(null, "日期输入错误！");
+			return;
+		}
+		start_Time = sdf.format(date1);
+		end_Time = sdf.format(date2);
+
+		{
+
+			try {
+				Class.forName("com.mysql.cj.jdbc.Driver");
+			} catch (ClassNotFoundException e) {
+				e.printStackTrace();
+			}
+
+			try (Connection c = DriverManager.getConnection( // 连接数据库
+					"jdbc:mysql://localhost:3306/supermarket?&useSSL=false&serverTimezone=UTC&serverTimezone=GMT%2B8", "root",
+					"00000000");
+					Statement s = c.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE);
+					Statement s1 = c.createStatement();
+
+			) {
+				String name = null; // 存储对应的码
+				String sql = String.format("select Cbno from Cargobigtype where cbname='%s' ", cargo_Name); // 在大类中查询
+				ResultSet rs = s.executeQuery(sql);
+				if (rs.next()) {
+					name = rs.getString(1);
+					rs.close();
+				} else {
+					String sql1 = String.format("select Csno from Cargosamlltype where csname='%s' ", cargo_Name);// 在小类中查询
+					ResultSet rs1 = s.executeQuery(sql1);
+					if (rs1.next()) // 不匹配
+					{
+						name = rs1.getString(1);
+						rs.close();
+						rs1.close();
+					} else {
+						String sql2 = String.format("select Cno from cargo where Cname='%s' ", cargo_Name); // 在货物数据库中查询
+						ResultSet rs2 = s.executeQuery(sql2);
+						if (rs2.next()) {
+							name = rs2.getString(1);
+							rs.close();
+							rs1.close();
+							rs2.close();
+						}
+
+						else {
+							JOptionPane.showMessageDialog(null, "未找到该商品");
+                            return;
+						}
+					}
+				}
+
+				String sql3 = String.format(
+						"select Soldno,Cno,Soldnum,Cprice,Sdate FROM CARGOSOLD where Cno like '%s%%' and Sdate between '%s' and '%s' order by Cno, Sdate",
+						name, start_Time, end_Time); // 查询货物出售数据库字符串，Cno用模糊匹配查询，结果按货物，日期升序
+//		System.out.println(sql3);
+				int i = 0;
+				ResultSet rs3 = s.executeQuery(sql3); // 存放货物出售查询结果
+				if (rs3.next() == false) { // 判断是否查询到所需信息
+
+					JOptionPane.showMessageDialog(null, "无出售记录!!");
+				} else {
+
+					rs3.beforeFirst();
+					while (rs3.next()) {
+						String soldno = rs3.getString(1);
+						String cno = rs3.getString(2);
+						int soldnum = rs3.getInt(3);
+						float cprice = rs3.getFloat(4);
+						Date dt1 = rs3.getDate(5);
+						String sql11 = String.format("select Cname from CARGO where cno='%s'", cno);
+						ResultSet rs4 = s1.executeQuery(sql11);
+						if (rs4.next()) {
+							String cname = rs4.getString(1);
+							str[i] = "出售订单号：" + soldno + ", 货物名称：" + cname + ", 货物编号：" + cno + ", 出售数量：" + soldnum
+									+ ", 出售单价：" + cprice + "元, 出售时间:" + dt1;
+						}
+
+						i++;
+					}
+				}
+
+				str[i] = "------------------------------------------------------------------------------------------------------------------"; // 将出售结果和进货结果分割开
+				i++;
+
+				String sql4 = String.format(
+						"select Cno,Buynum,Price,Bdate FROM CARGOBUY where Cno like '%s%%' and Bdate between '%s' and '%s' order by Cno,Bdate",
+						name, start_Time, end_Time); // 查询货物买进数据库字符串
+//			    System.out.println(sql4); 
+				ResultSet rs4 = s.executeQuery(sql4); // 查询结果
+				if (rs4.next() == false) { // 判断是否查询到所需信息
+
+					JOptionPane.showMessageDialog(null, "无进货记录!!");
+				} else {
+
+					rs4.beforeFirst();
+					while (rs4.next()) {
+						String bno = rs4.getString(1);
+						String cno = rs4.getString(2);
+						int buynum = rs4.getInt(3);
+						float price = rs4.getFloat(4);
+						Date dt2 = rs4.getDate(5);
+						String sql12 = String.format("select Cname from CARGO where cno='%s'", cno);
+						ResultSet rs5 = s1.executeQuery(sql12);
+						if (rs5.next()) {
+							String cname = rs5.getString(1);
+							str[i] = "进货订单号：" + bno + ", 货物名称：" + cname + ", 货物编号：" + cno + ", 进货数量：" + buynum
+									+ ", 进货单价：" + price + "元, 进货时间:" + dt2;
+						}
+						i++;
+					}
+				}
+
+			} catch (SQLException e) {
+				// TODO Auto-generated catch block
+				e.printStackTrace();
+			} finally {
+			}
+
+		}
+	}
+
+	public static void main(String[] args) {
+
+		Query_Enter_Exit_Cargo s = new Query_Enter_Exit_Cargo("可口可乐", "2020.6.1", "2020-6-5"); // 时间支持"年/月/日"，"年-月-日"，"年.月.日"格式输入
+																								
+
+		String[] ss = s.getstr();
+		int i = 0;
+		while (ss[i] != null)
+			i++;
+		for (int j = 0; j < i; j++) {
+			System.out.println(ss[j]);
+
+		}
+
+	}
+
+}
\ No newline at end of file
diff --git a/surpermarket/Query_turnover.java b/surpermarket/Query_turnover.java
new file mode 100644
index 0000000000000000000000000000000000000000..20fd9bbfa3434c8ed3407b954baf1387f9cab79d
--- /dev/null
+++ b/surpermarket/Query_turnover.java
@@ -0,0 +1,71 @@
+package surpermarket;
+
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.sql.Statement;
+
+import javax.swing.JOptionPane;
+
+public class Query_turnover{
+
+	
+	private String str=null;
+	public String getstr() { // 向前端传递查询结果信息
+		return this.str;
+	}
+
+	
+
+		public Query_turnover(String start_Time, String end_Time) {
+			
+			if ( start_Time == null || end_Time == null) {
+				JOptionPane.showMessageDialog(null, "查询信息未填写完整，无法为您服务！");
+			} else
+				
+			{
+			try {
+				Class.forName("com.mysql.cj.jdbc.Driver");
+			} catch (ClassNotFoundException e) {
+				e.printStackTrace();
+			}
+			String sql = String.format("select sum(Cprice*Soldnum) FROM CARGOSOLD where Sdate between '%s' and '%s' ",
+					start_Time, end_Time); // 查询货物出售数据库字符串
+			try (Connection c = DriverManager.getConnection( // 连接数据库
+					"jdbc:mysql://localhost:3306/supermarket?&useSSL=false&serverTimezone=UTC&serverTimezone=GMT%2B8", "root",
+					"00000000"); Statement s = c.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE);) {
+				ResultSet rs = s.executeQuery(sql);                     //查询结果
+				
+				if (rs.next() == false) { // 判断是否查询到所需信息
+
+					JOptionPane.showMessageDialog(null, "此段时间无流水!!");
+				} else {
+
+					rs.beforeFirst();
+					if(rs.next()) {
+					int money = rs.getInt(1);
+				str="此段时间流水为"+money;  }
+				}
+
+			} catch (SQLException e) {
+				// TODO Auto-generated catch block
+				e.printStackTrace();
+			} finally {
+			}
+
+		}
+	}
+		
+		
+		
+		
+		public static void main(String[] args) {
+			
+			Query_turnover ss=new Query_turnover("2010.3.4","2020.3.5");
+			
+			String str=ss.getstr();
+			System.out.println(str);
+			
+		}
+}
diff --git a/surpermarket/UpdateAccount.java b/surpermarket/UpdateAccount.java
new file mode 100644
index 0000000000000000000000000000000000000000..d5a4b0afb0b84d0618c0abb4f13b934cae232a07
--- /dev/null
+++ b/surpermarket/UpdateAccount.java
@@ -0,0 +1,78 @@
+package surpermarket;
+
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+
+import javax.swing.JOptionPane;
+
+public class UpdateAccount
+{
+	
+	// 加载数据库驱动  com.mysql.jdbc.Driver
+    public static final String DBDRIVER = "com.mysql.cj.jdbc.Driver";
+    
+    // 获取mysql连接地址      
+    public static final String DBURL = "jdbc:mysql://localhost:3306/supermarket?&useSSL=false&allowPublicKeyRetrieval=true&serverTimezone=UTC";
+    
+    // 数据名称
+    public static final String DBUSER = "root";
+    
+    // 数据库密码
+    public static final String DBPASS = "00000000";
+
+    
+    public UpdateAccount(String account,String password,String position) throws Exception{
+	        
+    	if(account==null) {          //判断账号输入框信息是否为空
+    		
+    		JOptionPane.showMessageDialog(null,"对不起！账号不能为空，请输入你的合法账号。");
+    	}
+    	else {
+    		
+	        Connection conn = null;                // 数据的连接
+	        PreparedStatement pstmt = null;                 // 数据库的操作
+	        ResultSet rs = null;                      //查询结果集
+	        
+	        String sql = "SELECT Account,Password,Position FROM ACCOUNT WHERE Account=?";   //查询语句
+	        
+	        Class.forName(DBDRIVER);               //加载驱动程序 
+        	conn = DriverManager.getConnection(DBURL,DBUSER,DBPASS);          //连接MySQL数据库时，要写上连接的用户名和密码
+        	
+	        pstmt = conn.prepareStatement(sql,ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE);       //实例化Preparedstatsment对象
+	        
+	        pstmt.setString(1,account);                //按顺序设置?内容
+	        
+	        rs = pstmt.executeQuery();                 //执行数据库查询操作
+	        
+	        
+	        if(rs.next() == false) {                       //判断该账户是否存在
+	        	
+        		JOptionPane.showMessageDialog(null,"该账户不存在，请先添加账户信息。");
+        	}
+	        else{
+	        	rs.last();                                 //移动到结果集最后一行
+		        
+		        if(password != null)                         //设置要修改的数据
+		        	rs.updateString("Password",password);
+		        if(position != null)
+		        	rs.updateString("Position",position);   
+		        
+		        rs.updateRow();                            //执行更新数据
+		        JOptionPane.showMessageDialog(null,"账户信息修改成功！");
+	        }
+	        
+	        rs.close();       //关闭
+	        pstmt.close();
+	        conn.close();
+    	}
+	 }    
+    
+    
+    //--------测试------------------
+    public static void main(String[] args) throws Exception {
+    	new UpdateAccount("mm2b2b",null,"经理");              //账号输入框信息不能为空
+    }
+    
+}