Research And Implementation Of Enterprise Employee Service System Based On Web Services

With web service evolving,it is advancing software system structure to evolve into Service Oriented Architecture(SOA).Because SOA's good loosely-coupled,platform-independent and other characteristics,it can easily adapt to distributed system development and integration,also provide a better solution to the reuse of software assets and interoperability of systems based on different platforms.SOA's essence is that every everything is regarded as a web service,it links every service units which are responsible for their duty with uniform interfaces via Enterprise Service Bus(ESB) and assembles them according to business flow's requirements,so eventually can provide powerful and flexible ability to process business transactions for enterprise clients.Web service is the foundation of SOA,but only web service itself is not enough, we still need to put them together according to some certain manners and logics,at the same time take security,performance and other aspects into account.First,the paper introduces some contents about web service which involves evolvement,standards,architecture and a couple of open-source web service framework,then based on Metro which is a web service framework of Sun corporation,make a detailed introduction and analyses on business process execution,realizing mechanism and process modeling in web service composition.Because of security and reliability can not be ignored in web service, so the paper further discuss security and realizing mechanism of web service.Based on J2EE development specification and the thought of traditional layered architecture model,the thesis redesigns some functional modules of Employee Self-Service System and realizes it,at the same time puts forward solutions to ensure the security of web service.