The Research Of The Web Services And Relevant Technologies In Digital Campus Construction

The paper presents the present situation and the problem that lies in the development of digital campus system. The author uses Web services technology to develop digital campus system in order to achieve the purpose of conformity and optimize campus information resource.The paper have Web services technology as its main part, firstly, the author introduces the character and the architecture of Web services technology, giving out the merits of this technology; secondly, the author introduces the core technology which Web services will use, such as XML, SOAP, WSDL, UDDI etc. Thirdly, The author chooses J2EE and Oracle as the implementation platform of Web services, introducing the development method of Web services on J2EE platform, and the distribution process of web services on Oracle AS 10g platform. In the last, the author sets up a private UDDI registration center based on Oracle UDDI registration center that provide the deploying and finding platform of web services.On the basis of all these technologies introduced in the previous part, the author put emphasis in introducing a concrete application that is a part of digital campus system—the development of management system of graduate student. Firstly, the author analyses the requirement of the system using UML to modeling the system. Secondly, according to the educational information management criteria, and using Oracle lOg as its core database, the author implements the database design. The development of whole system is as following: The implementation of the application tier is by EJB in which the entity bean is used to implement the system data tier, and session bean to implement logical tier. The author set part of the application as web services and deploys it to the SOAP server, and registry the web services in private UDDI registration center, so other users can call these web services.In the process of the development, the author mainly uses three technologies: UML modeling, Component develop based on EJB, and web services. In detail, UML is used to modeling whole system and implement part of the code; EJB technology is used to implement the concrete businessof digital campus system; and web services is used to deploy the application tier business to web services in order to let client to call. Because of web services, the author resolves the problem of "Information Island" in the construction digital campus system, each system can communicate with others conveniently. This kind of develop pattern, provide a whole new pattern in the development of digital campus system.