Research And Practice Of Application Integration Based On Web Service

Presently, the application systems based on the network lack overall planning, each of which functions separately, and the phenomenon of Information Island is ubiquitous. However, current main integrated technologies, such as CORBA, DCOM and RMI, adopt the inherent model and depends on the protocols themselves excessively, which lead to the poor interoperability and flexibility of the systems. Aimed at the problems mentioned above, by using the uniformity, loose-coupling and high integration of Web Service, this thesis studied and analyzed the design and technologies of implementing application integration patterns based on Web Service Moreover, the integrated agriculture products transaction system was developed The goal of this thesis is to achieve cross-platform, autonomous integration of application, and improvement of the system expansibility and interoperability. The application integration patterns based on J2EE and Web Service not only provides relatively complete solution for integrating network application system, but also provides a new design and development pattern for the information construction of agriculture products transaction. Main contents and conclusions are as follows:(1) This thesis discussed the technical characteristics and system architecture of Web Service. and analyzed the related key technologies and key protocols of Web Service, such as XML,SOAP,WSDL and UDDI .(2) This thesis analyzed the problems existed in traditional integrated scheme and the related technologies of J2EE and JWSDP. With the Struts architecture, this thesis proposed hierarchical integration model based on Web Service and analyzed the key problems such as design pattern, architecture, key technologies, development pattern. This model fits for the characteristics of distributed application integration, which have better universality and compatibility and can avoid Information Island effectively as well.(3) This thesis designed integrated agriculture products transaction system based on Web Service and constructed an integration platform for the agricultural products information by using the definition, publishing, finding, binding and calling of services in the integration patterns. This platform could integrate multiple data sources and application effectively, provide transparent integration interface which can realize the connection of several applications and functions of dynamic and high efficient information browse, search and automate order and etc.(4) This thesis discussed in detail the development and implement method of integrated agriculture products transaction system based on Web Service, including the defining and development of the service accessing interface, service description, service deployment, service publishing on the service provider side, and the design and realization of the discovery, binding , calling and the relative steps on service requester side.The result shows that integrated agriculture products transaction system based on Web Service verified the feasibility and practicability of application integration model constructed in this thesis, and make the round trip of information and data transmitting between remote application programs possible and system can perform loose-coupled integration, overcoming the limitation of CORBA and DCOM. Thus it can realize the business integration and solve the problem of low efficiency in the traditional electrical transaction market of agriculture products.