说明：  精通Struts技术,为了更深刻的理解Struts框架，你必须先理解MVC设计模式，Struts技术的就是基于MVC设计模式的
(Struts technical proficiency, in order to more profound understanding of Struts framework, you must first understand the MVC design pattern, Struts technology is based on the MVC design pattern)