Research And Design And Implementation Of J2EE-Based Distributed On-Line Shopping System

The selection of subjects of this paper is from engineering practice—the development of On-Line Shopping System。We designed a multi-level distributed application based on J2EE framework, and used this framework to develop and deploy a distributed On-Line Shopping System with high-maintainability,high-reliability and high-performance。At first , this paper has introduced the architecture of J2EE, explained the core technology of J2EE platform in details, and simply introduced the concept and use of design patterns。After learned adequate theoretical knowledge, we discussed presentation layer,business layer and lasting layer, etc, in-depth: used JPF technology to create a practical and viable presentation layer framework; analysed the problem that often appeared when designing the business layer, and made solution strategy, expounded design patterns and application guidelines of business layer in application。In business infrastructure, designed and implemented a tiered structure of the business layer: operational control layer,business facade layer,business processing layer and business object layer; Analysed the general technical means to achieve lasting layer, and put forward some suggestions against the problems that often appear while designing lasting layer, and used DAO design pattern to encapsulate the visite of the data source of O/R mapping framework----Hibernate , designed and implemented a lasting framework with high-stability。Final, the paper discussed the performance of the system。In experimental basis, analysed the permance test results of the system, and give a positive vista to the system's development。...