Research And Design Of The College Entrance Examination System Based On SOA

SOA (Service-Oriented Architecture) is an advanced thinking of using service element to build a enterprise IT structure. With the development of network technology, a series of system is developed. But these systems become different "information island" that communicate hardly with each other. SOA possesses the sound features such as being loosened coupling, rough grain-size and retro-operative etc. Through the means of the design scheme adoping the SOA framework, the coupling among systems and modules can be reduced to the maximum extent and the software reusing can be improved, therefore the remaining system can achieve a better integration to upgrade its flexibility and expandability.This research has studied SOA-based WebServices technology, designed a SOA-based application system, and implemented the key technology of SOA framework In system prototype with the College Entrance Examination System as a case. To explicitly model interactions between independent chunks of software as services, amd makes use of SOA to design the service system. Integrate the Web Services technology to enable the user gain the business logic through the citation of standardized Web Services interface; besides it helps the business logic of the system to be completely realized through either the service from third-party or service combination, strengthen the encapsulation of the common function and become basic service to offer interface to be called by other services. The fluctuant functional flow should be forming service oneself, so that it can reduce the load for the latter system modification and enhance the reusing of the system, all this has big significance.This dissertation first introduces the concept, feature, structure model and realization technology and goes deep into the discussion on the relationship of SOA and Web Services technology. Secondary the requirements of the College Entrance Examination System are analyzed. Based on the business process and the principle of design for service, SOA approach is used to build the service-oriented architecture. In the design, combine Web Services and the Servlet technology of J2EE, import the XML technology to encapsulate data message and combine the validation of encrypted so that it ensures the validity of system user authority control. Aiming at the application trait, designing the business model service with mutil-layers service model: Service Interface Layer, Business Layer, Data Layer and presentation layer, it carries out the rough grain-size Web Services. The layers in clear division can support a simple model for the latter development. Finally, having a detailed analysis of the business logic for the Entrance Business Process module, using top-down decomposition method business with the principle of service portfolio design, in order to design the corresponding service model and the corresponding service interface. It provides a detailed reference model for the complete design of the system.