Based J2ee Guangzhou Guaranteeing The Oa System

The lowest living ensure job is the most important job of civil administration department. The civil administration department of guanzhou city makes up to build the office automation system of guangzhou lowest living ensure based on the sprirt of country and guanzhou city. The office automation system of guangzhou lowest living ensure is mainly used to deal with the registeration, approval and management of the lowest living ensure operation through the internet, so dynamic and decision-making anaysis will be realized in the whole and part city. This paper introduces the architecture of the Web application system based on J2EE four-tiers structure, and discusses in detail the system analysis , design and key-technology of the office automation system of guangzhou lowest living ensure.J2EE is an architecture which is used to simplify the complications ofDevelopment, deployment and management of enterprise solutions.J2EE architecture supplies middle-tier integrated framework to satisfy the requirement which needs a little cost but high availabity, high reliability and extensiblity.The system employs J2EE four-tiers based structure. Browser provides visual graphic interface;Web Server responds to the requests of the clients. Application Server processes application, computation and data operation;DB Server stores and administrates information. The implementation of multi-tier structure enables the system to have distinguished quality of flexibility, currency and compatibility.The system uses UML method to analyze, and then create the object model, function model and approval workflow model. The system is composed of system management, common module and business system, the function of the whole system is performed by them and the data interchange assistant moudule.This system involves all types of data imformation of approval andmanagement business, the data information is abundant and tight-associated. So the paper thoroughly discusses the design and optimization of DBMS system, integrality and consistence of the data and data redundancy. With the introduction of the mechanism of data visiting security, which maintains the security and the stability of the system. This paper offer some optimization scheme of performance, such as finitely view patern, message proxy patern and entity engine etc. The entity engine optimization scheme is already realized in the process of system optimization.