Research On Implementation Of Enterprise Application Integration Based On Multi-tier System Of J2EE

Enterprise application integration can implement the seamless integrating between two enterprise application systems or more by combining operation flow, internet application, hardware and many kinds of criterion so that the enterprise application systems can handle business and share information as they belong to the same system. In the traditional application system, enterprise need integrate the application systems within business or between businesses according to business model, which can implement the integrated commerce flow within business and support the business operation between businesses. But it can not meet a requirement of enterprise and leads to high cost and low efficiency. Enterprise application integration often needs to be modified and to be more agile and flexible as the business model changes from time to time. The appearance of J2EE system answers the question of traditional application system step by step.J2EE system is the industry standard for development of enterprise application system with Java technique and the outcome of the procedure which acclimatizes Java to enterprise application and promotes it.J2EE system is the Multi-tier model which is provided for the rigid requirement for enterprise information system and the applications based on internet. However, J2EE also has many problems which need to be solved as soon as possible because of the development of business model.The dissertation's main content is the applying of J2EE for enterprise application integration and the improvement project for the problems of enterprise application integration. Firstly, thinking enterprise application integration as a center, the dissertation introduces the basic meaning, background, development and effect of enterprise application integration. Also, the dissertation presents J2EE system and its developing model after presenting the popular systems for the development of current enterprise application integration. With present applying of enterprise application integration, the dissertation analyses the problems in the field of enterprise application integration, including: 1) coupling and coding quality of different integration arrangement;2) asynchronism operation of integration system;3) providing service and security of integration system;4) the balance between performance and flexibility of O/R mapping of integration system;5) unfunctionality factor in the running environment. Secondly, in allusion to the important problems which enterprise application integration facescurrently, the dissertation use the principle of design pattern and the technique of distributive application server based on message middleware and web service based on SOA thinking to provide the reasonable solution solving the problems of enterprise application integration. Finally, the dissertation presents the developing model which has four tiers and two controllers and applies the solutions which are presented by this dissertation practically, combining the practical distributive application of carrying trade industry. After the running of the system, it is explained that the solutions presented by this dissertation are operable.