Gas Management System Based On J2ee Web Technology Architecture Design And Implementation

It is a very important subject to the management of information of nature gas, the installation of the equipment for charging and inquires about the gas. This subject reflects the consumers and the companies directly on their benefits and efficiency. Compare with other domain. the domain in this article is still state in a laggard position due to its special character. The goal of this question for discussion is to speed up the progress of the management of information of nature gas.As a new mature distributed computing technology, J2EE was used in the mostly fields. An application system is developed can free choice and achieved whit it's collapsible and extended frame. The technology of java is widely favor for its frame is clearness and lucidity and it can run at dissimilitude operating system .For these reasons and the goal of this system, he java technology is adopted to implement this system of the question for discussion .This article briefly introduce the present state in China of this subject and research the social meaning and economic meaning brought about this system.The author describes the base module included in this system, and introduces the function of each module; analyze the case graph about the module. Define the classes involved in the module.The contents described below are involved in the article: the designation of the infrastructure about this project; the realization of the module about common data operation and the affection in this project; the proposal about the method invocation of EJB; the design pattern of MVC; the application of Struts architecture in web layer; the superior of the design patterns named "Session Facade" and "EJBHOME Factory"; introduction about the data transfer mode using DTO; subscription about the privilege distribute using JAAS in Jboss; the realization and configuration of https protocol in this system. The presence layer is realized by Tiles technology of Struts.Based on the analysis of the characters about every sub-module, the author promotes the infrastructure of the system and the technology adopted. The target of this project is: the technology adopted is feasible; the architecture of each layer is...