Study Of A Number Of Issues Of Common Reporting System

Thanks to the comprehensive application and mature of computer technology, lots of corporations are introducing computer system to fields of business, services and daily work. How to build a robust, efficient, secure, extensible enterprise application system is a hot topic IT industry is researching. In recent years, the conception of "Rich Client" is blooming. Rich Internet Application combines the responsiveness and richness of desktop software with the broad reach of web applications to deliver a more effective user experience. Adobe Flex is a relatively mature rich client technology now. Many web applications are built with Flex.This thesis gives the design rules to Generic Report Center from presentation layer, business logic layer, persistent layer based on J2EE three-tie architecture. According to these rules, based on J2EE architecture, we work out the design of presentation layer and business logic layer taking Flex and EJB technology into consideration and implement it.This thesis also analyses the issues from system performance and maintenance perspective of both frond-end and back-end and points out the root of issue. By making Flex compiler unit smaller, the thesis gives a solution for issue of time-consuming Flex SWF transmission and loading. By using "Paging" theory and cutting the large data set transmitted between front-end and back-end into small pieces for transporting, the thesis gives a solution for issue of time-consuming data transmission between front-end and back-end. By merging the EJBs with similar functionality and substituting POJO for EJB, the thesis gives a solution for improvement of back-end performance. By using object-oriented theory to re-factor the front-end Flex code the thesis gives a solution for the issue of bad system maintenance. Finally, the thesis gives the implementation of these solutions and improves the system performance and maintenance...