The Implementation Of Web Book-Choosing System Based On J2EE

Recently, designing the electronic commerce system based on J2EE standard has been one of the best popular technologies in IT field. The technology can easily divide the application system into three layers, view layer, logic layer and database layer. The view layer provides the web pages showed on the client explorer. The database layer is a database retaining the data such as Oracle, Access. The logic layer is responsible for the data processing, and it locates between view layer and database layer providing the data for the view layer. The J2EE standard can enhance expansibility of the application system and efficiency of the application server, and it also can make developing easier.In the paper I will design an online book-choosing system, very similar with the common online bookstore. The system can be called an online bookstore's functional module, because there is much similarity in system realization. And the online bookstore is a typical application of electronic commerce, so my destination is to discuss the architecture of electronic commerce based on J2EE. There were many applications designed and developed based on C/S or B/S, with the development of the Internet, the traditional application systems have been more and more replaced by distributing application systems.The system developed by J2EE standard has the virtues the general J2EE applications have, such as independence of platform, high security and easy expansibility. In the process of developing, many key technologies of J2EE are involved, including EJB, Jsp, Servlet, JDBC, JNDI and XML. Some design patterns are also used to improve the developing efficiency and system capability, such as MVC, Session Facade and Value Object. The analysis of system requirements is completed by UML.No IDE (integrated development environment) tools such as Eclipse is used in the whole developing process. The codes and XML files are edited with text editor, and the EJB server's configuration and deployment of application are finished by original means. Although the way is more difficult and troublesome than using IDE, itis more helpful to understand the structure and principle of the J2EE standard.