diff --git "a/41 \347\224\230\345\260\217\345\274\272/2023-05-23_223122.png" "b/41 \347\224\230\345\260\217\345\274\272/2023-05-23_223122.png"
new file mode 100644
index 0000000000000000000000000000000000000000..488481cb0a9d943ba4f97dabf1c6dc2523132258
Binary files /dev/null and "b/41 \347\224\230\345\260\217\345\274\272/2023-05-23_223122.png" differ
diff --git "a/41 \347\224\230\345\260\217\345\274\272/20230522.md" "b/41 \347\224\230\345\260\217\345\274\272/20230522.md"
new file mode 100644
index 0000000000000000000000000000000000000000..db8fb83f8620177415be9203acabe57726b4c4df
--- /dev/null
+++ "b/41 \347\224\230\345\260\217\345\274\272/20230522.md"	
@@ -0,0 +1,102 @@
+```java
+import java.sql.*;
+
+public class DBUtil {
+    // 先创建一个数据库的工具类，可以将注册驱动，连接对象，等等都封装成对应的方法
+    private static final String url="jdbc:mysql://localhost:3306/student?useSSL=false&useUnicode=true&characterEncoding=utf8";
+    private static final String username="root";
+    private static final String pwd="123456789";
+
+    //用静态代码块注册驱动
+    static {
+        try {
+            Class.forName("com.mysql.jdbc.Driver");
+        } catch (ClassNotFoundException e) {
+            throw new RuntimeException(e);
+        }
+    }
+    //获取连接对象
+    private static Connection getConn() throws SQLException {
+        Connection conn = DriverManager.getConnection(url, username, pwd);
+        return conn;
+    }
+
+    /**
+     * 通用的查询方法
+     * @param sql 接收的SQL语句
+     * @return 将查询的结果集返回给调用者
+     * String ...keys ：...表示可变的参数，0个或是任意个数的参数都可以
+     */
+    public static ResultSet query(String sql,String ...keys) throws SQLException {
+        Connection conn = getConn();
+        PreparedStatement pst = conn.prepareStatement(sql);
+        // 设置？的值
+        // pst.setString(1,userid);
+        // pst.setString(2,username);
+        for (int i = 0; i < keys.length; i++) {
+            pst.setString((i+1),keys[i]);
+        }
+        ResultSet rst = pst.executeQuery();
+        return rst;
+
+    }
+    //通用的update
+    public static int update(String sql,String ...keys) throws SQLException {
+        Connection conn = getConn();
+        PreparedStatement pst = conn.prepareStatement(sql);
+        for (int i = 0; i < keys.length; i++) {
+            pst.setString((i+1),keys[i]);
+        }
+        int i= pst.executeUpdate();
+        return i;
+
+    }
+    //通用的释放资源的方法
+    private static void close(Connection conn,PreparedStatement pst,ResultSet rst) throws SQLException {
+        if (rst!=null){
+            rst.close();
+        }
+        if (pst!=null){
+            pst.close();
+        }
+        if (conn!=null){
+            conn.close();
+        }
+
+    }
+}
+```
+
+```java
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.util.ArrayList;
+import java.util.List;
+
+public class Test {
+    public static void main(String[] args) throws SQLException {
+        String sql = "select * from stu";
+        ResultSet rs = DBUtil.query(sql);
+//        while (rs.next()) {
+//            // 获取结果集里的内容的方法有两种：1，通过内容的位置，即（字段的个数的位置，从1开始） ，2 ，直接通过字段名获取
+//            int id1 = rs.getInt("id");
+//            String name1 = rs.getString("name");
+//            String sex1 = rs.getString("sex");
+//            System.out.println("编号：" + id1 + "," + name1 + "," + sex1);
+//        }
+        List<String> resultList = new ArrayList<>();
+//        遍历结果集并将数据存入集合
+    while (rs.next()) {
+        int id = rs.getInt("id");
+            String name = rs.getString("name");
+            String sex = rs.getString("sex");
+    resultList.add(id+name+sex);
+        } //
+//        遍历集合
+    for (String result : resultList) {
+            System.out.println(result);
+        }
+    }
+}
+```
+
diff --git "a/41 \347\224\230\345\260\217\345\274\272/20230523.md" "b/41 \347\224\230\345\260\217\345\274\272/20230523.md"
new file mode 100644
index 0000000000000000000000000000000000000000..692f03759af032eaf504eb7bea8ac14ee445874d
--- /dev/null
+++ "b/41 \347\224\230\345\260\217\345\274\272/20230523.md"	
@@ -0,0 +1,53 @@
+```java
+package com.mxdx.servlet;
+
+
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
+import java.sql.*;
+
+public class Student02 extends HttpServlet {
+    @Override
+    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
+        System.out.println("DoGet is running .......");
+
+
+        try {
+            Class.forName("com.mysql.jdbc.Driver");
+            Connection conn = DriverManager.getConnection("jdbc:mysql:///student?useSSl=false&useUnicode=true&characterEncoding=utf8", "root", "123456789");
+            String sql="select * from stu";
+            PreparedStatement pst = conn.prepareStatement(sql);
+            ResultSet rst = pst.executeQuery();
+            while (rst.next()){
+                int id = rst.getInt("id");
+                String name = rst.getString("name");
+                String sex = rst.getString("sex");
+                System.out.println(id+name+sex);
+
+            }
+        } catch (ClassNotFoundException e) {
+            e.printStackTrace();
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+
+    }
+
+    @Override
+    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
+        super.doPost(req, resp);
+    }
+}
+
+```
+
+![](D:\JSP+Sverlet网站开发\jsp_servlet\41 甘小强\2023-05-23_223122.png)
+
+### 数据库都连不上我还怎么做，:sob::sob::sob::sob::sob::sob::sob::sob::sob:::sob:，
+
+尽力了
+
+# ！
\ No newline at end of file