From 5637ae910b282eb0a3161a4d399f7f6c9cfbc362 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E7=A8=8B=E5=B8=85=E7=BF=94?= <3371439772@qq.com>
Date: Mon, 22 May 2023 11:30:40 +0800
Subject: [PATCH] =?UTF-8?q?5=E6=9C=8821=E6=97=A5=E4=BD=9C=E4=B8=9A?=
MIME-Version: 1.0
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---
 ...21\346\227\245\344\275\234\344\270\232.md" | 174 ++++++++++++++++++
 1 file changed, 174 insertions(+)
 create mode 100644 "52\347\250\213\345\270\205\347\277\224/5\346\234\21021\346\227\245\344\275\234\344\270\232.md"

diff --git "a/52\347\250\213\345\270\205\347\277\224/5\346\234\21021\346\227\245\344\275\234\344\270\232.md" "b/52\347\250\213\345\270\205\347\277\224/5\346\234\21021\346\227\245\344\275\234\344\270\232.md"
new file mode 100644
index 0000000..375affe
--- /dev/null
+++ "b/52\347\250\213\345\270\205\347\277\224/5\346\234\21021\346\227\245\344\275\234\344\270\232.md"
@@ -0,0 +1,174 @@
+## Stu
+
+```
+public class Stu {
+    private int id;
+    private String name;
+    private String sex;
+
+    public Stu() {
+    }
+
+    public Stu(int id, String name, String sex) {
+        this.id = id;
+        this.name = name;
+        this.sex = sex;
+    }
+
+    public int getId() {
+        return id;
+    }
+
+    public void setId(int id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getSex() {
+        return sex;
+    }
+
+    public void setSex(String sex) {
+        this.sex = sex;
+    }
+
+    @Override
+    public String toString() {
+        return "Stu{" +
+                "id=" + id +
+                ", name='" + name + '\'' +
+                ", sex='" + sex + '\'' +
+                '}';
+    }
+}
+```
+
+## 增删改查
+
+```
+public static Connection conget(){
+    Connection con = null;
+    try {
+        con = DriverManager.getConnection(url, username, password);
+    } catch (SQLException e) {
+        System.out.println("连接异常");
+    }
+    return con;
+}
+public static ResultSet qure(String sql,String...keys) {//查询
+
+    PreparedStatement pre = null;
+    ResultSet res = null;
+    try {
+        Connection con = conget();
+        pre = con.prepareStatement(sql);
+        for (int i = 0; i < keys.length; i++) {
+            pre.setString((i + 1), keys[i]);
+        }
+        res = pre.executeQuery();
+
+    } catch (SQLException e) {
+        throw new RuntimeException(e);
+    }
+    return res;
+}
+public static int insert(String sql,String...keys) {//添加
+    int num = 0;
+    PreparedStatement pre = null;
+    try {
+        pre = null;
+        Connection con = conget();
+        pre = con.prepareStatement(sql);
+        for (int i = 0; i < keys.length; i++) {
+            pre.setString((i + 1), keys[i]);
+        }
+        num = pre.executeUpdate();
+
+    } catch (SQLException e) {
+        throw new RuntimeException(e);
+    } finally {
+        try {
+            pre.close();
+            conget().close();
+        } catch (SQLException e) {
+            throw new RuntimeException(e);
+        }
+    }
+    return num;
+}
+public static int update(String sql,String...keys) {//修改
+    int num = 0;
+    PreparedStatement pre = null;
+    try {
+        Connection con = conget();
+        pre = con.prepareStatement(sql);
+        for (int i = 0; i < keys.length; i++) {
+            pre.setString((i + 1), keys[i]);
+        }
+        num = pre.executeUpdate();
+        pre.close();
+        conget().close();
+    } catch (SQLException e) {
+        throw new RuntimeException(e);
+    } finally {
+        try {
+            pre.close();
+            conget().close();
+        } catch (SQLException e) {
+            throw new RuntimeException(e);
+        }
+    }
+    return num;
+}
+public static int delete(String sql,String...keys) {//删除
+    int num = 0;
+    PreparedStatement pre = null;
+    try {
+        Connection con = conget();
+        pre = con.prepareStatement(sql);
+        for (int i = 0; i < keys.length; i++) {
+            pre.setString((i + 1), keys[i]);
+        }
+        num = pre.executeUpdate();
+
+    } catch (SQLException e) {
+        throw new RuntimeException(e);
+    } finally {
+        try {
+            pre.close();
+            conget().close();
+        } catch (SQLException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    return num;
+}
+```
+
+## Test
+
+```
+import java.sql.ResultSet;
+
+public class Test {
+    public static void main(String[] args) {
+       String sql="select * from studnet";
+       ResultSet qure = Text.qure(sql);//查询
+//       String sql1="insert into Studnet value(6,'马达','女'),(7,'佳炜','男'),(8,'俊伟','男'),(9,'帅翔','男'),(10,'帅翔','男'); ";
+//       int insert = Text.insert(sql1);//增添
+//        String sql2="update Studnet set sex='男' where id=6";//修改
+//        int update = Text.update(sql2);
+//        String sql3="delete from Studnet where id=10";//删除
+//        int delete = Text.delete(sql3);
+//    }
+}
+}
+```
\ No newline at end of file
-- 
Gitee