Study On Web Application Based On J2EE And MVC

With the development of Internet and Web technology, use on Internet of Web application system is more and more extensive. Web is it has static behavior release simple function of message only again to use, but also demanded to have real-time dynamic ability to deal with mutual information, this requires still in the constant change and improves.In Web technology of developing, SUN J2EE technology that Company put out it proves to be successful, it possess Java consistent platform independence, distributed handling capacity strong and getting safe advantage not merely, and has already formed the standard system structure in the development of Web application system, transplanting and compatibility is very strong, the most important thing is, it is totally target-oriented, use the design philosophy of procedure facing target to carry on the design and programming, the ones that will improve the procedure greatly will be intelligible, the maintainability of the procedure after will strengthen.But, because J2EE technological complexity of itself lead to the fact at present while using J2EE technological development multi-layer Web to use for a lot of question, for example the interface shows, the procedure is controlled and the logic code of business mixes and causes performance, maintainability, expansibility and reusable decline, etc. each other. MVC mode rely on its model and is it separate, carry on controller procedure person who control advantage to show, have accorded with the basic demand of application system development of present Web.Combining the characteristics of MVC mode and J2EE, this text provides E _ MVC model, explained that develops the solution that Web uses on the basis of EMVC model. This model regards Web browser as the customer end, with Web server, EJB server finishes the affairs logic that enterprises calculate for the intermediate level, the data layer is traditional large-scale enterprise layer database servers.This model can solve the problem that traditional Web exists when developed, and systematic procedure and system function are divided clearly, expansibility, the advantage such as being strong of the maintainability. The controller is a key to EMVC model, and the tie of contacting view and model, have probed into the controller design method emphatically in thesis. At the same time to business layers of design and is it go on detailed comments to realize of EJB. This text has developed the system of an online bookstore actually according to EMVC model. This system has reflected the design philosophy of E_MVC model, has realized the basic function of the online bookstore.