Design And Realization Of Graduate Employment System Based On J2EE Framework And Mixed Model

With the development of network, the development of web application system, especially the enterprise web application system, has become an important field of software developments. The enterprise web application system always requires an excellent architecture, more accumulation of the technology and the experience, more rigorous management of the project. But the traditional development modes of web application system do not commendably meet those requirements. So some developers bring forward a new development mode of web application system that is based on the web application framework, and developed some characteristic web application framework. This paper brings forward a new web application framework aiming at the enterprise web application, which can resolve many problems in the development of the enterprise web application.Firstly, this paper designs and implements a web application framework based on J2EE platform with the ideas about software architecture, framework, design pattern, and object-oriented. The framework adopts the idea of MVC pattern and Model 2 architecture. With the framework, the development of web application system will get many advantages, including clear software architecture modularize configure, uniform accessing mode of application model, many processing mode of view, excel expansibility and maintenance, and sustain separation of roles of developer, etc.Secondly, this paper introduces the emergence, architecture and properties of EJB as well as lucubrate the EJB in persistence best practices and EJB best practices and performance optimizations and component restriction. The result of research set up some strategies and regulation. The paper combined the EJB and the development technology of electronic business application. Based on the upper architecture, the system of Graduate Employment is successfully implemented, and many problems in the development are resolved.At last, Research of database connection pools technology in web application is done in this paper. Both client-managing and self-managing classes of database connection pools are implemented to optimize the performance of the system. Based on the research of request/response model of HTTP protocol, session tracking and processing technology is used to implement access only to authorized users, and policy of resource access control and form-based authentication are combined to implement the security manager module in the system.