idea连接MySQL

发布于:2022-10-23 ⋅ 阅读:(370) ⋅ 点赞:(0)



https://dev.mysql.com/downloads/j/
下载

选择 (注:select Operating System这里一定要修改!!!)

 解压后将jar包复制 

 

在idea新建包lib,粘贴jar包,将新建包lib设为库

实现代码
public class demo1  {
    public static void main(String[] args) throws ClassNotFoundException, SQLException {
        //一方式
        DataSource dataSource = new MysqlDataSource();
        ((MysqlDataSource) dataSource).setUrl("jdbc:mysql://localhost:3306/db2?characterEncoding=utf8&useSSL=false");//注册驱动
        ((MysqlDataSource) dataSource).setUser("root");//用户名
        ((MysqlDataSource) dataSource).setPassword("290015");//密码
        String sql = "update dept set  loc='江西1' where id=10";//mysql语句
        Connection connection1 = ((MysqlDataSource) dataSource).getConnection();//获得连接对象
        PreparedStatement statement1 = connection1.prepareStatement(sql);//执行对象
        statement1.close();//关闭资源
        connection1.close();//关闭资源
        //二方式
        Class.forName("com.mysql.cj.jdbc.Driver");//注册驱动
       Connection  connection = DriverManager.getConnection(
       "jdbc:mysql://localhost:3306/db2", "root", "******");
        String sql1 = "update dept set  loc='江西1' where id=10";//mysql语句
        PreparedStatement statement = connection.prepareStatement(sql1);//执行对象
        statement.execute(sql1);
        statement.close();//关闭资源
        connection.close();//关闭资源
    }
}

 

 注意若你出现红色警告,

将Class.forName("com.mysql.jdbc.Driver");改为

Class.forName("com.mysql.cj.jdbc.Driver");