【摘要】 介绍系统开发的三层架构模式。基于三层架构设计使得系统管理简单、支持异种数据库,并且有很高的可用性。目前商务逻辑层越来越受到人们的重视。商务逻辑层即服务层,一般可分为两种:轻量级服务和重量级服务。讨论了通用中间服务层存在的优点及其不足。研究了远程过程调用的相关知识。对于专用软件的开发采用RPC技术自定制服务。最后通过实例,并利用面向对象思想实现了科研管理信息系统。得到了良好的应用效果。更多还原

【Abstract】 Introduce the three-level system development model.Based on the three-level design,which make it easy for managing system and supporting heterogeneous databases.There is also high availability.Now business logic layers are attracting increasing attention.The service-level can be divided into two classes,lightweight services and heavyweight service.Discuss common services and its advantages and disadvantages.Research the content of remote procedure call.For the specifically software we use RPC technology.Finally,there is an example,which uses of object-oriented theory to achieve a study management information system(SMIS).Finally get satisfy results.更多还原