Designing And Application Of J2EE Based E-Learning Framework

As a good added method to traditional education, E-Learning is received more and more attention from all over the world. It extends the time and space of the traditional education, solving the problem of teaching resource and providing abundant resources and colored teaching style.As the same as setting up a building needs a solid foundation and a good framework, designing an application with good performance needs a good structure, especially for a large one. A framework is a reusable designing. It sets the architecture of an application and gives the relying relationship between components. It also gives the flow of controlling. The key of a framework is the controlling between objects.J2EE is a widely received industry standard, provided by Sun Microsystems and other companies. EJB is the core technology of J2EE. J2EE is used to develop and deploy multi-tier architecture applications. Through providing the necessary services to the enterprise computing, it makes the application deployed on it can realize higher usability, security and extensibility.Model-View-Controller is an architectural design pattern. Model is used for business logic, View is used to provide data presentation, and controller is to dispatch requests and control flow. This separation makes the application more easily modifiable. MVC helps separate business logic and data representation. Also, it helps providers and developers with different skill sets to focus on their core skills.This paper set forth an E-Learning framework based on J2EE. First it gave a method to design a consistent user interface. Second, it developed a central controller using a servlet. And use this controller to receive the requests from user. Then call the corresponding model to process. Give users a response according to the processing results. Besides, it gives two methods to protect the resource. At last, designed a login model and a register model and use them to test this framework.