struts-2基本架包

代码说明：

说明：  Struts2是一个基于MVC设计模式的Web应用框架，它本质上相当于一个servlet，在MVC设计模式中，Struts2作为控制器(Controller)来建立模型与视图的数据交互。(A standard and universal tag library for Java Web developers, Struts2, is a web application framework based on MVC design pattern, which is essentially equivalent to a servlet. In MVC design pattern, Struts2 is used as a controller to establish data interaction between model and view.)