基于J2EE平台的Web GIS的设计与实现

Design and Implementation of Web GIS Based on J2EE Platform

传统的Web GIS产品由于未能解决好客户端和服务器端的负载平衡问题,大大限制了其使用范围。基于J2EE的分布式Web GIS模式能够很好地平衡两端的负载进而更好地发挥服务器和客户端的性能。通过介绍J2EE及其组件———EJB,分析Web GIS的总体架构,结合具体的Web GIS系统进行设计与分析,探讨了系统中的XML数据流技术以及JDBC连接池技术的应用,并以读取地图为实例具体描述了J2EE分布式结构的流程与核心技术的应用。随着J2EE技术的日益成熟,Web GIS必能得到更加广泛的应用。

At present, traditional Web GIS products haven＇t solve the problem of the load balance between the client side and the server, so it restricted the area of its application. The distributed Web GIS pattern based on J2EE can solve the load balance between them perfectly, and it can exert the capability of the client side and the server much better. With the introduction of J2EE and its components——EJB, the article analyzes the general structure of Web GIS. Designing and analyzing the material Web GIS, it probes into the application of XML data stream technique and JDBC connection pool in the system.With the development of J2EE technique, Web GIS must be applied in a more extensive area.