| The concept of workflow originates from OA.It is aim to the activity with fixed procedure in the daily life. The purpose is to depart the work into some tasks,roles,carry on and control these roles to increase efficiency,lower the cost,increase management level and competition ability. Along with the development of web technique ,more and more application is based on web, the B/ S( Browser/ Server) structure system has become current trend of application software system. The B/ S( Browser/ Server) mode has many advantages compare with C/S, The B/S needn't any software on client and works only on browser. You needn't save any information on client, your work is only to maintenance the server, it's suitable for distributed platform. With the emergence of web, the company has a cheap and simple client, he can concentrates on his business, so the cost is small. Today, many enterprises demand distributed,event and enterprise class application program, at the same time the speed,safty and reliability are required. J2EE platform provides a multilayer and distributive mode of application, enabling the ability of reusage. It integrates the funtion of data switch based on XML, which offers a uniform safe mode and flexible control of transactions. The arise of J2EE techniques brings the new idea of software development. The component of J2EE can be deemed as an encapsulated unit of software. The combination of many component forms the J2EE application system, in which every component could communicate with each other. The logic of commercial is also encapsulated in the reusable EJB, so that the J2EE server could provides the baisc service to all components in form of a container. It relieves the developer from worrying about the basic services, so they can concentrate on the solving of commercial problems. Through the... |
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