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2024-12-13 12:57本頁(yè)面
【正文】 ate can resolve the difficulties ing from using traditional CMP, JDBC and Data Access Object(DAO) in a technological development. For reducing the coupling of code and raising systematic development efficiency, this paper suggests J2EE application development tactics based on Struts and Hibernate. The Struts design shows the MVC framework sufficiently, which all control flows need a configuration file () to manage, and which is convenient to maintain. The integration of Struts and Hibernate is that Hibernate solves the model layer of Struts, which makes developers operate Java objects instead of database. The integration shows the objectoriented thought sufficiently and solves some problems of the database operation in traditional J2EE well. Flow of Framework The flow of integration framework based on Struts and Hibernate is shown in Figure 3. At first, users send Http requests by Browser, then Http requests are accepted by ActionServlet of the control ponent in business layer, then gave to RequestProcessor which gets corresponding Action from ActionMapping by request URL[3]. Besides, ActionForm packs JSP pages, which can make a checking to data of datasheet if it is needed, send back ActionErrors to visual pages if there are mistakes and transfer the data of pages to Action if it passes validation. Request Processor transfers the “execute” method of Action and the method transfers the business logic module. Hibernate acplishes interaction of databases and JavaBean. The operation of processing business logic interacts with database by data permanence layer and field object layer. The “execute” method of Action will return ActionForward objects that are accepted by ActionServlet after executing. Systematic Structure of the Integration Framework The EIS layer of the multilayer J2EE systematic structure can be partitioned into the data permanence layer and the data resource layer. It means a system can be divided into five layers as a whole. Client Layer: This layer runs in the Browser of users’ machines and handles interaction with users, transmits and shows messages to users. J2EE platform supports different type users including HTML users, Java Applets, Java application, etc. Presentation Layer: This layer works in J2EE Web container, produces the systematic representation logic, handles users’ requests and makes the responses. The entire Web is built on Struts framework, in which the View ponent is posed of JSP/HTML pages whose data is expressed by ActionForm Bean,
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