IDEA使用JDBC链接MySql（java编程）

1、在Maven的pom.xml文件中引入MySql的驱动

<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>8.0.27</version>
</dependency>

2、idea（版本:2021.2.2）JDBC链接MySql数据库

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3、编写JDBC代码 ：

​
package com.hong.test;

import java.sql.*;

public class TestJDBC {
    public static void main(String[] args) throws ClassNotFoundException, SQLException {
        String url = "jdbc:mysql://localhost:3306/JDBC?useUnicode=true&characterEncoding=utf-8";
        String user = "root";
        String password = "root";

        //加载数据库驱动
        Class.forName("com.mysql.jdbc.Driver");

        //创建数据库链接对象
        Connection connection = DriverManager.getConnection(url, user, password);

        //插入数据的sql语句
        String sql = "insert into admin(username, password, email, birthday) VALUES (?,?,?,?)";

        //操作数据库 PreparedStatement
        PreparedStatement statement = connection.prepareStatement(sql);

        //插入数据
        statement.setString(1,"李四");
        statement.setString(2,"123456");
        statement.setString(3,"ls@qq.com");
        statement.setDate(4, new Date(new java.util.Date().getTime()));

        //i : 返回受影响的行数
        int i = statement.executeUpdate();
        if(i>0){
            System.out.println("插入成功@");
        }else{
            System.err.println("插入失败@");
        }
    }
}

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