Research And Realization Of Official Document Transition System Based On Workflow

Workflow technology, as a new research field, has being widely applied in the fields of manufacturing, office automation, concurrent engineering, electronic government and so on. It is the key technology to realize modeling, optimizing, managing and integrating of enterprises' business process and also the automation of business process. The workflow technology has become an important method to smooth the business process and improve the competitiveness of enterprises.Petri Nets System is an advanced tool to describe asynchronies computing model, since that time it has been studied in depth, and possess stability theory basis and analyses technology. A workflow model based on Petri Net can be frankly examined and powerful supported a model of workflow process, so it can be provided distinct and correct.This paper researches the application of Workflow technology in Official Document System, according to the actual conditions, Petri-net was chosen as a tool for Workflow modeling, and its route structure and trigger mechanism of Workflow were introduced to the modeling course. Moreover, three key elements of Petri-net were described in the form of object, and the whole procedure was expressed by three lists, which can be recognized by program language, therefore makes it possible for procedure self defining.In order to increase practicability and security of the Official Document System, two parts are considered: the first is Petri Net, HLPN(High-Level Petri Net) was injected, Time Petri Net and Colored Petri Net. Time Petri Net can solve restriction of time of running process, via adding a time restriction model. After using Colored Petri Net, the system can distinguish different kinds of instance. The second is Java security machine, it can encrypt electronic files and provide digital signature, with the support of this technology, the system achieves its confidentiality, integrity, privacy, and non-repudiation. The archetype system achieved typical functions of a workflow management system, as well as implement of security on activities' execution.Then, we introduce the B/S designing mode based on the Web technologies of Java, The JSP handles the presentation layer, the Javabean realizes the complicatedfunction of some modules and the Servlet controls the collaboration between the presentation layer and the logical layer. The aim for developing this system is to realize the common functions of the OA system and further it attempts to realize the information security scheme that will have a mixed security policy, which can provide external CA security service and the role based access control function within this system.