javaweb--JDBC入门

package com.avb.jdbc;

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

public class jdbcdemo {
    public static void main(String[] args) throws Exception {
        //注册驱动
        Class.forName("com.mysql.jdbc.Driver");
        //获取连接
        String url = "jdbc:mysql://127.0.0.1:3306/db1";
        String username = "root";
        String password = "root";
        Connection conn = DriverManager.getConnection(url,username,password);

        //定义sql
        String sql = "update account set money = 2000 where id = 1";

        //获取执行sql的对象Statement
        Statement stmt = conn.createStatement();
        //执行sql
        stmt.executeUpdate(sql);
        //释放资源
        stmt.close();
        conn.close();
    }
}