JDBC

1.需要jar包mysql-connector-java-8.0.13.jar

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;

public class Test {

    public static void main(String[] args) throws Exception {
//        System.out.println("Hello World!");
//        1.注册驱动
        DriverManager.registerDriver(new com.mysql.jdbc.Driver());
//        2.获取连接
        Connection conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/student?useUnicode=true&characterEncoding=utf8&serverTimezone=GMT", "root", "mysql");
//        3.获取操作数据库的预处理对象
        PreparedStatement pstm = conn.prepareStatement("select * from student_info");
//        4.执行sql语句并夺取返回结果
        ResultSet rs = pstm.executeQuery();
//        5.封装结果集
        while (rs.next()){
            System.out.println(rs.getString("name"));
        }
        //6.释放资源
        rs.close();
        pstm.close();
        conn.close();
    }
}

2.数据库

3.运行如下