JDBC打通数据库

 1 package com.study.db;
 2 
 3 import java.sql.Connection;
 4 import java.sql.DriverManager;
 5 import java.sql.ResultSet;
 6 import java.sql.Statement;
 7 
 8 public class DBUtil {
 9     
10     private static final String URL="jdbc:mysql://localhost:3306/demo_jdbc";
11     private static final String NAME="root";
12     private static final String PASSWORD="root";
13 
14     public static void main(String[] args) throws Exception{
15         
16         //1.加载驱动程序
17         Class.forName("com.mysql.jdbc.Driver");
18         //2.获得数据库的连接
19         Connection conn = DriverManager.getConnection(URL, NAME, PASSWORD);
20         //3.通过数据库的连接操作数据库，实现增删改查
21         Statement stmt = conn.createStatement();
22         ResultSet rs = stmt.executeQuery("select user_name,age from imooc_goddess");//选择import java.sql.ResultSet;
23         while(rs.next()){//如果对象中有数据，就会循环打印出来
24             System.out.println(rs.getString("user_name")+","+rs.getInt("age"));
25         }
26     }
27 }