Design And Implementation Of Remote Education Platform Based On J2EE

With the technology of Internet and digital satellite communication as the support, modern distance education boasts great freedom in time and space, rich shared resources, open system and convenient cooperation. Because of these advantages, the modern distance education with Internet as the major means becomes inevitable. Thereby, to turn the traditional teaching activities onto the network and to make lifetime education possible by using modern information technology are urgent and significant.In order to implement a more flexible, usable and robust distant education platform according to online assignment, quiz and practice requirements, this thesis has chiefly conducted the research of the following aspects:1) Research and application of J2EE component technology and design pattern. The system implemented by J2EE framework is more reusable. Combined withthe practical application in the development of the online assignment, quiz and practice platform, this thesis has studied and analyzed the J2EE component technology and several design patterns of J2EE.2) Design of online assignment, quiz and practice platform's framework based on the multi-layer of J2EE architecture.According to the application of online assignment, quiz and practice platform, and after analyzing the design patterns of J2EE, this thesis puts forward one system framework which is based on the J2EE multi-layer architecture. The author uses UML's sequence diagram to describe this framework clearly,.3) Web design and implementation based on AjaxUsing the asynchronous communication with Server implemented by Ajax, aMVC fabric design plan is proposed based on Ajax. Combined with the employing framework, this thesis provides the realization of this scheme through an embodiment, and realizes the most abundant and friendship user interface in the webpage, bringing to users no broken vision experience.4) Research and application of RBAC technologyThis thesis realizes dynamic access control module based on an extended and detailed RBAC model, to improve the flexibility and security of RBAC model.5) Research and application of strategy of organizing test paperThis thesis discusses the key point of organizing test paper automatically related to the online assignment, test and practice platform, and analyzes parameters of organizing test paper, particularly gives the concrete designs and realization steps, and realizes setting papers with problems chosen at random.