Research On Establishing Information System Based On Webservices

Current idea to develope information system is making the enterprises' whole business flows emplemented under a close coupling information systems, even if it will be realized step by step, systems' developing is also divided it to several modules according to its different function. As soon as the system is completed, it was hard to be extended or updated, and even impossible to share data with other completed systems. Oberviously, inflexible, unchangeable systems are not suitable for enterprises' rapid renovation.Web service exists based on the standard of abroad acceptance, it is a close coupling structure among different Web services. So, the information system which is based on Web service and for service will be more suitable to those enterprises under rapid developing. To realize the web service-based management information systems, the most important thing is to break down each function from the system to make a kind of granularity modules with a certain small function, each module will be realized by one Web service. After all of such Web service are availible, submit them to UDDI, then according to user's requests on interface and function, realize intergration via using related Web-services, thereby, establish a close coupling management information systems which can meet with enterprises' all kinds of requests. Information system based on Web-services has the speciality of flexibility, extension and re-construction. With above stated situation, this thesis will investigate more about how to construct webservice-based managment information systems as flowing:After analyzing and summarizing the popular methods in information system establishment, the author pointed out their deficiencies and put forward a general way to establish information system based on web services. On the basis of deepresearch of web services theories, this thesis carefully described the status quo and development of web services, web services architecture and web services application values.Studied the relationship between web services granularity, business values and re-use capacity, the author found several key factors that affecting web services granularity, such as quality and scale, transaction and status, business adaptability.Analyzed web services-based information system integration architecture, the author lucubrated web services-based multi-enterprises information system integration model from following aspects: integration mechanism, model frame, web services citation manager and web services citation computing process.Simply analyzed fundamental web services security technologies, the author worked on solutions to ensure web services connection security, signal security, identification validation and authorization. According to organizational requirement of various security levels, the author posed three web services security levels as open, simply encryption, complex encryption, and lucubrated the mechanism for inter-organizational web services information system establishment.Final, with a case of office's collaborative systems, do a demonstration reserch on how to construct webservice-based management infromation systems.