快速入门

在模块下新建lib文件夹，将mysql的jar包粘贴进去并右键选择添加为库，范围选择模块库

package jdbc;

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

        //2.获取连接
        String url = "jdbc:mysql://127.0.0.1:3306/test";//固定写法 3306后面是要连接的数据库名
        String username = "root";
        String password = "123456";
        Connection connection = DriverManager.getConnection(url, username, password);

        //3.定义sql
        String sql = "update student set name = \"Ben\" where id = 1";

        //4.获取执行sql语句的对象
        Statement statement = connection.createStatement();

        //5.执行sql
        int i = statement.executeUpdate(sql);//返回受影响的行数
        System.out.println(i);

        //6.释放资源
        statement.close();
        connection.close();
    }
}