Building Web Application With UML And Struts

With the development of Internet technology ,more and more Web Applications are required ,the fields that it involved in are becoming broader, and the higher complexity of Web Application System are incurred. To adapt to the development of situation, the Web Application System of multi-tier application architecture came into being, which has been one of the fastest computer application systems since the Internet technology was employed and has gradually been the main model of computer application systems. Now there are two main technology architecture of multi-tier application architecture based on component: Sun Microsystem's J2EE and Microsoft's .NET.J2EE has had a rapid development because of its open specification, independence of platform, better translation, and extension, and strong support from many companies in software industry. The Servlet and JSP technology are very effective web view component in J2EE platform. But most of developers often ignore the web system's maintenance and extension when they build the web application. This paper's research focuses on the design pattern, framework and UML modeling technology in J2EE web application. MVC Design Pattern is one of the important design patterns. Model is the relative data which is the internal property of Object;View is external presentation form of Model, one Model can correspond to one or more View, View also possesses the function of alternating with environment;Controller is the relating ligament of Model and View, Controller picks up the external information transmitting from View and transfers to corresponding event and the update the Model. Then this paper discusses the J2EE architecture based the MVC design pattern, including the components of J2EE,the principle of J2EE platform, J2EE component technology and standard service, J2EE multi-tier application architecture as well as development method of Web Application System based on J2EE. Then paper describes the concept of Design Pattern, emphasizes the framework of MVC and UML and provides a new development method based on MVC and J2EE, and develops a Web application using the method. At last, we make a conclusion of the work that has done in this paper, bring forward some insufficiency in the research and envision of the research in the future.