The Design And Implementation Of Information System For The Construction Enterprise Based On J2EE Architecture

With the continuous development of computers and network technology, many enterprises have developed enterprise information system for themselves. However, with the expansion of their business, the traditional enterprise information system based on C/S model is unable to meet the requirements of the business expansion on Internet. And this research is aimed to establish a multi-tier distributing Web information system which is based on J2EE architecture.This thesis begins with the brief introduction of J2EE architecture and design pattern, which emphasizes in discussion of the system structure of J2EE and the concepts of MVC pattern. Through discussion, we have found a multi-tier architecture based on J2EE and MVC pattern which provides a good mechanism for a telescopic, flexible and easy maintaining business system. Regarding the practical technology, Web tier is constructed with currently popular Struts frame technology. And in EJB tier, the business objects are constructed to realize the systemic core business logics. In consideration of the technical limitation of the entity Bean, the model system uses a new Object-Relational Mapping frame of Hibernate to realize the Persistence Layer. After detailed research of Struts and Hibernate frame, we have come to the conclusion that integrating both the frames of Struts and Hibernate is favourable to achieve the design pattern of MVC.Subsequently, this thesis provides detailed analyzes of the systemic functions in all the business models of the NCJG-QYGL project, and then the total design scheme is finalized. Through systemic functional analysis, we have found that the management of the flow in works is the core content of enterprise management. Therefore, in the 5th and 6th chapter, the emphasis is given to analyze the work-flow management module. And by the usage of Struts and Hibernate frame, the realization of this module is given.