【摘要】 从体系结构的角度,分析了传统C/S结构、B/S结构和三层C/S结构的特点及优缺点,进一步阐述了利用三层C/S结构进行城市地质信息系统开发的必要性和优越性.详细介绍了三层C/S结构的3个层次:数据层、业务逻辑层和用户界面层及其各自不同的职责和通讯机制,并以义乌市城市地质环境信息系统为例介绍了三层C/S结构与面向对象技术、组件式技术相结合共同构建城市地质环境信息系统的实现方法.从分析、建模、设计、编码等不同角度证明了三层C/S结构应用于地质环境信息系统的可行性.更多还原

【Abstract】 This paper discusses the character,strongpoint and shortcoming of traditional C/S structure,B/S structure and three-tiered C/S structure,and describes the essential and the advantage of using three-tiered C/S structure in City-Geology Information System.In the paper,the three layers of three-tiered C/S structure is introduced,including: Data Access Layer,Business Layer and User Interface Layer,and each layer’s responsibility and the communication theory is listed,too.Yiwu City-Geology Information Environment System is taken for example and the implementing method combining three-tiered C/S structure,object-oriented technology with component technology is shown.From different views of analysis,modeling,design and coding prove the feasibility of three-tiered C/S structure application in City-Geology Environment Information System.更多还原