Using The J2ee Framework For Building Web Services Application Integration

With the rapid development of computer science and the Internet, network applications more and more demand a platform-independent and language-independent framework which enables seamless web-based integrations. In order to enable anyone to access to business services anytime and anywhere, enterprise applications should provide on-line and platform-independent accessibility.Web Services are methods to share data and functions on the Internet. Its interfaces and envelopments can be defined, described and discovered in XML language. It supports direct exchange with other softwares by sending XML messages among network protocols. Web Services technology is a distributed application framework based on XML, SOAP, WSDL and UDDI. The goal of Web Services is to achieve dynamic integrations of applications. Java 2 Enterprise Edition (J2EE) provides a set of component-based design, development, envelopment and deployment-tools and procedures of enterprise applications. J2EE can be regarded as an enterprise-level middle-ware architecture or plateform, which combines various resources distributed on defferent network, and provides a runtime environment to develop scalable businesses applications.Firstly, this paper analyses Web Services and related technologies, such as SOAP, WSDL, UDDI and so on. Secondly, on the basis of analyzing traditional distributed computing technologies and their limitations in Web environment, this paper carrys out a SOAP-based Web Services invocation framework which is more adaptable to the web. The framework provides a solution to integrate applications, which could eventually ignore the differences between systems of different component models, different operating systems or different programming languages. Thirdly, based on this framework, the paper introduces a design and implementation of a Web Services system. We developed a SOAP server with all needed functions. We integrated a UDDI registry into our SOAP server, which improves the system's extensibility. Lastly, the paper makes a conclusion on our studys and points out some future works, and proposes some possible ways to improve our SOAP server.