一个基于MVC的注册功能的程序。视图层：reg.jsp（位于根目录WebRoot下）控制层：RegAction（其mapping url为：/user/reg.action）模型层：UserService 的regUser()方法后台数据表：myuser-A program based on MVC. View layer: reg.jsp (located in the root directory WebRoot) control layer: RegAction (URL mapping: