chang18829350947的博客

package person.example;import java.util.ArrayList;import java.util.List;/* * 基本迭代：0~100个数字相加之和 *  */public class FirstClass { static int sum = 0; public static void main(String[] args) { List<Stri...

package com.jdbc.test;import java.sql.Connection;import java.sql.DriverManager;import java.sql.SQLException;/** * 创建数据库连接 *  懒汉式：单例模式 * @author Administrator * */public  class CreatConnection { publi...