基于hibernate和struts的选课排课系统毕业设计英文文献翻译.docVIP

毕业设计说明书 英文文献及中文翻译 学生姓名： 学号： 学 院： 专 业： 指导教师： Best practices for Struts development Struts: A brief introduction Struts, an open source framework you can use to build Web applications, is based on the popular Model-View-Controller (MVC2) design paradigm. The framework is built upon standard technologies like Java Servlets, JavaBeans, ResourceBundles, and XML, and it provides flexible and extensible components. Struts implements the Controller layer in the form of?ActionServlet?and recommends building the View layer using JSP tag libraries. Struts also provides a wrapper around the Model layer throughAction?classes. Figure 1 illustrates the Struts framework based on the Model-View-Controller design.Figure 1. Struts and MVC ? Overview of Struts components First, well explain the Struts components in the context of best practices and the role each one plays in your Web application development. Action Every?Action?of your application extends Struts?org.apache.struts.action.Action. These?Action?classes provide an interface to the applications Model layer, acting as a wrapper around the business logic. Each?Action?class must provide its case-specific implementation to the?perform()?method. The?perform()?method always returns a value of type?ActionForward. ActionForm Every?ActionForm?of your application extends Struts?org.apache struts action ActionForm.?ActionForms are simple JavaBeans that encapsulate and validate request parameters. To validate your request data, your?ActionForms?validate()?method must give a case-specific implementation.?ActionForms serve as a carrier of request data to the?Action?class. A JSP object combines with a respective?ActionForm?to form your applications View layer, where almost every form field of the JSP object maps to an attribute of the corresponding?ActionForm. JSP custom tag libraries The JSP custom tag libraries are