Calculator

说明：  基于Java的仓库信息管理系统。本系统主要完成对超市仓库的库存管理，包括商品入库、出库、库存，供应商信息以及密码管理等六个方面。系统可以完成对各类信息的浏览、查询、添加、删除、修改等功能。系统采用SQL server 2000作为数据库(Java-based warehouse information management system. The system consists mainly of completion of the supermarket warehouse inventory management, including commodity storage, a library, inventory, suppliers and other information, as well as password management six. System can be completed on all types of information browsing, query, add, delete, modify functions. SQL server 2000 system as a database)

借助JavaBean实现在页面上显示指定目录下的文件。(With JavaBean to display the files in the specified directory page)

主要用于登录和注册,是以java的基础喂核心的(Mainly used to login and registered,On the basis of the core of Java feed )

java常连接通信,java基于web聊天系统(java often connected communication)

客户端的聊天内容通过json格式封装(包含聊天内容、发送人信息)之后，HTTP请求百度服务器，即请求把该消息发送到指定id的用户，请求成功之后，百度服务器就把我们的信息转发给指定的用户，对应用户再解析json格式的信息，就可以知道该消息来自何处，以及消息内容。(Chat client via json format package (includes chat, sender information), after, HTTP requests Baidu server, which sends the message to the requesting user specified id, after the request is successful, Baidu server took our information forwarded to the designated users, the corresponding user information and then parse json format, you can know that the message came from, and message content.)

A Java calculator that uses a recursive descent parser converted directly from C++ code.

基于信誉的无线传感器网络模型。用java编写的(Trust and Reputation Models Simulator for Wireless Sensor Networks。the program is implemented by java)

1. 分别使用Vector、Hashtable、Stack，ArrayList、LinkedList和HashSet作为容器类，实现以下要求： (1) 向容器中添加1,000,000个随机整数。 (2) 遍历容器中的所有元素。 (3) 随机产生100,000个整数，在容器中查找这些整数。 (4) 随机产生100个整数，从容器中删除这些整数。 (5) 统计完成以上各个操作需要的时间。 比较一下不同操作在不同数据结构下的性能差异。程序文件命名为Exe5_1.java。 (51 respectively using Vector, Hashtable, Stack, ArrayList, LinkedList and HashSet as the container class, to achieve the following requirements: ( 1) are added to the container 1000000 random integers. ( 2) to traverse all the elements in the container. ( 3) 100000 randomly generated integer, in the container to find these integers. ( 4) random produces 100 integers, is removed from the container of these integers. ( 5) complete the statistics above each operation requires time. Compare the different operating at different data structure performance differences. Program file named Exe5_1.java )

java实现vpn连接，有测试例子，调用dll(Java to achieve VPN connection, there are test examples, call DLL)

基于springboot2+ shiro+jwt的真正rest api资源无状态认证权限管理框架,开发人员无需关注权限问题,后端开发完api,前端页面配置即可(Based on the real rest API resource stateless authentication permission management framework of spring boot 2 + Shiro + jwt, developers do not need to pay attention to permission issues. after the API is developed, the front-end page configuration can be completed.)