| SOA is a kind of new framework theroy to build up web application. It considers every web application on Internet as a Web Service. Users can construct their web applications by jointing up several Web Services according to their conditions in a certain scope. Web Service has many advantages. It releases one API for other services and hides the detailed realization. It uses some standard technologies, such as UDDI, WSDL, HTTP, SOAP and XML etc in its realization. Then we can develop web services that have nothing to do with platforms and program languages to utilize the resources we have. E-learning is a popular teaching way now. Teachers and students can have communication on network in real time. E-learning system, J2EE platform and Web Service technology are introduced firstly in this paper. The system is divided into several function modules based on the characteristics of E-learning. And MVC model is adoptted to the system architecture designing. Then the database and table structure are designed. After this, entity beans and session beans are designed and given an example of its realization in the real-time teach part, basic teach part and study course part. Next, Web Service technology is applied to the E-learning system. Web services of the systematic function modules are designed according to related standards and architecture. The file architecture and simple realization of authentication module are given in the end. |
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