Online Test Database System Design Based On The J2ee Architecture And Realization

With the development of Internet and Information Technology, Online Education becomes more and more popular. Online Education has many advantages : such as large volume of information, informative, lively; Teaching and learning rescuing from the time, geographical restrictions and so on. Online Examinations are an important part of Online Education. The design of Online Praxis Storehouses and forming papers is the base of Online Examinations.This paper introduces the architecture and the realization of the Online Praxis Storehouses system based on J2EE. The system achieve the database management of standardlized praxis rescouces and achieve the sharement and the quick dispense of praxis rescouces. More over, it offers forming papers in manual or automatic way, and enable users testing online.The system employs J2EE four-tier based structure. Browser provides visual graphic interface; Web Server responds to the requests of the clients. Application Server processes application, computation and data operation; DB Server stores and administrates information. The implementation of multi-tier structure enables the system to have distinguished quality of flexibility, currency and compatibility.This paper dissertates the process of the development of the Online Praxis Storehouse system which is divided into 3 phases according to the software engineering ideology :In needs analysis phase, I established the Functions Model and the Objects Model using the UML system to determine the structure and behaviour; In the system design phase I discussed the network structure of the system, the structure of the system and the database system designing, solving some important problems such as the establishment of knowledge and the storage of proxis. And then I established the design model for some major function module. In the...