因为许多人出去吃饭都一个人付帐，回来再平分，所以使用struts2来实现了一个午餐计费，统计，平衡钱数的功能，使用mysql数据库，tomcat服务器-Since eating out is a lot of people pay people back and then split, so the use of struts2 to achieve a lunch billing, statistics, balance the am