J2EE-Based Multi-Tiers Design Method And Its Application

With the enhancing of informatization within enterprise, the traditional enterprise development platform is now facing flinty challenges. Because of the frequent change of internal logic, rigorous security demand and massive controlled data, modern enterprise information system demand that development platform should provide enough flexibility to adapt the demand of development of modern enterprise application system. In the system construction of the development model. It has developed from client/server model to the B/S model until now of multi-tiers B/S model; to adapt to the development of situation, the Web Application System of multi-tiers application architecture came into being. How to develop network application system fast and exactly on J2EE platform according to customer's needs is an important problem in front of all researchers.Premising basically with multi-tiers B/S frame based on J2EE, this thesis introduces enterprise application whose center is business logic tier and web service tier, and makes a point of investigating business logic tier and web service tier technology in the multi-tiers B/S enterprise application model based on J2EE. Firstly, we lucubrate multi-tiers B/S frame and J2EE technology and summarize their advantages and characters. By detailed analysis and research, we propose that multi-tiers B/S enterprise application based on J2EE is the advanced solution to the construction of modern enterprise system. Secondly, we introduce the multi-tiers B/S enterprise application model based on J2EE and make a point of the core tier--business logic tier and web service tier--in the J2EE multi-tiers model. In the web service tier, we realize unified identity service by using single sign on technology, in the business logic tier we design the workflow problem and permission control problem in detail by using design pattern. Then combining with practical project, have a try on how to apply the method of multi-tiers B/S frame and J2EE principle and technology to the construction of high quality and practicable distributed enterprise application. Finally, we propose some problems under further exploratory research on the basis of summarizing the whole thesis.