| J2EE,which is presented and established by SUN Microsystem company, is the specification of a computing platform for distributed components based on Java technology. Based on this platform, an application system with multiple tiered structure can be developed and deployed rapidly. It also is the system architecture of complicated problem that a kind of development, management,implementation of making use of Java 2 platform to simplify the enterprise solution. It has be in order to put up good rules for building the elastic,flexible,easy maintained business systems . JBoss is that J2EE of a opening source code uses the server, utilizes JBoss to dispose the low-priced application system. This text regards UML as the modeling language, utilize J2EE and XML technology, analyze and design an enterprise and a grade of applications system of project management on Jboss platform.Having explained the background of developing,the purpose and meaning in chapter one at first, then we introduce the specialized term and institutional framework of this text .We introduce the tool that will be adopted to the system in chapter two, and technological platform has be carried on the detailed explanation.Has gone on detailed analysis to the system in chapter three, the system structure architecture will be adopted has been explained correctly at first, and we give out and build up the charts. Then we analyze the system requirement, including: Key function subsystems use case, user management subsystems use case, news subsystem use case, Then we explain separately the design of class picture,the design of order picture and the design of cooperation picture, Class design has been introduced partly in a kind of pictures: Customer end and Web Layer of class picture,business of class picture ; and the order and cooperation picture has been introduced partly in pictures: analysis and design of making project subsystem,adding users subsystem and news subsystem.Then we discuss the realization systematically emphatically partly and key function subsystem,user subsystem and news subsystem. We use the MVC to build up and implement the EPMS system at first, then we have discussed how to realize the function supporting for multi-type customer end and report form print, recommend at last how to realize that the data are maintained.The conversation status management and form submitting problems are the focus of the implementation of the system, we have analyzed respectively in keeping the conversation information on the server end and customer end, having summarized out the pluses and minuses, and a systematic solution has appeared. We return the question of a form on the detailed exposition, including: what kind token rules that we will use,how to initialize the tokens,how to compare and kill the tokensones,how to make the new tokens.Java and J2EE in permitting developers to set up systematic respect - of N is very successful. But it has led to the fact while hiding the course of complexity that developers are easy to fall into the serious systematic performance trap. Especially say systematically to large-and-middle-scale Java application, performance and elasticity question are an important problem that must consider. This text has explained especially in this respect, summarize out several factors which influence the systematic one at first: Show /Web layers performance,Business layers performance,the performance of mutual Show /Webs layers and business layers ,database performance,the performance of mutual application server and database, And has proved separately. Probe into and use server collect groups of tactics emphatically then, load balanced layout strategy and how realize ordinary EJB cluster among JBoss. Then we introduce the test that a systematic performance tests with the example and test environment and operational approaches that are used and disposing, through running and test we can carry on detailed for analysis and explanation. We make the expandability of EPMS a simple intr...
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