jdbc-处理查询结果集

package com.cqust;

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

//处理查询结果集
public class JDBCTest04 {
public static void main(String[] args) throws Exception {
String url = "jdbc:mysql://localhost:3306/cqust_db";
String user = "root";
String password = "****";
//1.注册驱动
//这里会调用静态代码快执行驱动注册
Class.forName("com.mysql.jdbc.Driver");

    //2.获取连接
    Connection connection = DriverManager.getConnection(url,user,password);


    //3.获取数据库操作对象

    Statement statement = connection.createStatement();

    //4.执行sql
    String sql = "select id,user2_name from t_user2 where id = 1";
    
    ResultSet resultSet = statement.executeQuery(sql);

    //5.处理查询结果集(针对select语句，如果不是则不需要这一步)

    
    while (resultSet.next()){
        int id = resultSet.getInt("id");
        String name = resultSet.getString("user2_name");
        System.out.println(id+"| "+name);
    }


    //6.关闭资源
    if (resultSet !=null){
        resultSet.close();

    }
    if (statement !=null){
        statement.close();

    }
    if (connection !=null){
        connection.close();

    }




}

}