Java：
package com.imooc.jdbc.demo1;

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

import org.junit.Test;

public class LianXi_2_11 {
	@Test
	public void demo() {		
		Connection conn=null;
		Statement stmt=null;
		ResultSet rs=null;
		try {
			Class.forName("com.mysql.cj.jdbc.Driver");
			conn=DriverManager.getConnection("jdbc:mysql://localhost:3306/jdbctest1?serverTimezone=CST", "root", "123456");
			String sql="select * from goods where price<3500";
			stmt=conn.createStatement();
			rs=stmt.executeQuery(sql);
			while(rs.next()) {
				int id=rs.getInt("id");
				String name=rs.getString("name");
				String price=rs.getString("price");
				String desp=rs.getString("desp");
				System.out.println(id+" "+name+" "+price+" "+name);
			}
			rs.close();
			stmt.close();
			conn.close();
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
		
	}

}

mysql：

create database jdbctest1;

use jdbctest1;

create table goods(

  id int unsigned key auto_increment,

  name varchar(20) not null,

  price float not null,

  desp varchar(30) not null

);

insert goods(name,price,desp) values('手机',2000.0,'黑色，存储容量32G'),

  ('冰箱',1500.0,'银色，对开门'),

  ('洗衣机',3000.0,'滚筒'),

  ('空调',4000,'变频空调');

  select * from goods;