JDBC操作Mysql示例

一、mysql驱动下载：

地址：https://cdn.mysql.com//Downloads/Connector-J/mysql-connector-java-8.0.29.zip

二、项目引用

1  创建项目，模块

2 把 mysql-connector-java-8.0.29.jar 复制到项目中

3 引入的mysql包添加项目引用

三、示例代码

import com.mysql.jdbc.Driver;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.Statement;

public class JDBCDemo {
    public static void main(String[] args) throws Exception {
        //1 注册驱动
        Class.forName("com.mysql.cj.jdbc.Driver");

        //2 获取连接
        String url = "jdbc:mysql://10.1.1.1:3306/db_test";
        String username = "qingyuning";
        String password = "[email protected]~2022";
        Connection conn = DriverManager.getConnection(url, username, password);
        
        //3 sql 语句
        String sql = "update account set age=18 where id=1";

        //4 获取执行sql的对象
        Statement stmt = conn.createStatement();

        //5 执行sql
        int count = stmt.executeUpdate(sql);

        //6 打印处理结果
        System.out.println(count);

        //7 释放资源
        stmt.close();
        conn.close();
    }
}