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网吧计费系统: 会员卡信息管理（注册、充值、注销、修改密码） 会员持卡上机（上机、验证、结算打印清单）(Internet Billing System: membership card information management (registration, recharge, write-off, Change Password) membership card on the machine (the machine, verify, print the list of settlement))

本文先简要地介绍正则表达式的入门知识，然后以Jakarta-ORO API为例介绍如何使用正则表达式。(This article first briefly describes introductory knowledge of regular expressions, and then to Jakarta-ORO API example describes how to use regular expressions.)

模拟当当网的电子商务系统，包括用户注册登录、商品浏览、详细信息、购物车、订单管理、收货信息等，采用MVC架构，mysql数据库，功能齐全，代码简介易懂。(Analog Dangdang' s e-commerce system, including user registration Login goods browse detailed information, shopping cart, order management, receiving information, the use of the MVC architecture, mysql database, fully functional code Introduction understandable.)

主要是获取到天气信息后的中文字符处理，返回字符串的全拼,是汉字转化为全拼,其它字符不进行转换。(Get weather information to the Chinese character processing, returns a string Quanpin, Chinese characters into Quanpin, the other characters are not converted.)

说明：  根据获取到的数据导出到Excel表格中，列名固定，项目名称动态循环输出(According to the data obtained, it is exported to Excel table with fixed column name and dynamic circular output of project name.)

用于生成gexf格式的数据文件，为后续的可视化开发服务(Used to generate data files in gexf format, serving for subsequent visualization development)

根据获取到的数据导出到Excel表格中，列名固定，项目名称动态循环输出(According to the data obtained, it is exported to Excel table with fixed column name and dynamic circular output of project name.)

一个显示当前时间的数字和图形的时钟,比较简易，适合初学者学习(A clock)

用户管理系统，可以从文件中读取，也可以从数组中读取。DB的读取方式没写全(User management system that can read from the document can also be read from the array. DB did not write the way of reading the entire)

说明：  Java development related books