java 连接MySQL数据库
- package com.hu.demo;
- import java.sql.ResultSet;
- import java.sql.SQLException;
- public class Demo {
- static String sql = null;
- static DBHelper db1 = null;
- static ResultSet ret = null;
- public static void main(String[] args) {
- sql = "select *from stuinfo";//SQL语句
- db1 = new DBHelper(sql);//创建DBHelper对象
- try {
- ret = db1.pst.executeQuery();//执行语句,得到结果集
- while (ret.next()) {
- String uid = ret.getString(1);
- String ufname = ret.getString(2);
- String ulname = ret.getString(3);
- String udate = ret.getString(4);
- System.out.println(uid + "\t" + ufname + "\t" + ulname + "\t" + udate );
- }//显示数据
- ret.close();
- db1.close();//关闭连接
- } catch (SQLException e) {
- e.printStackTrace();
- }
- }
- }