B-S论文：基于Flex的富客户端技术研究与应用.doc

B/S论文：基于Flex的富客户端技术研究与应用 【中文摘要】随着计算机硬件和网络的高速发展,已经退出企业应用开发市场的C/S应用程序又开始被用户提起。C/S应用程序的重新提起不是客户的随性而为,而是希望使用具有C/S体验度的应用程序。下面介绍一下C/S开发模式的优点和缺点。基于C/S模式开发出来的软件具有以下特点：响应速度快、用户操作界面漂亮、能够根据用户要求进行定制、并且能实现复杂的业务流程。但是C/S模式开发出来的软件需要专门的客户端安装程序,并且分布能力弱,对于点多面广又不具备网络条件的客户群体,就难以实现快速部署安装和配置。对于不同的开发工具,具有较大的局限性,开发成本较高,需要具有一定技能的技术人员才能完成。因此就诞生了B/S开发模式。B/S模式具有分布性广的特点,不需要到处安装也能够随时运行并进行业务的处理,业务的扩展也比较简单和方便,简单网页的增加就能够增加服务器的功能,维护也简单,开发成本较低,共享性比较强。虽然B/S开发模式有着诸多优点,但是人们又开始怀念C/S模式下开发的程序,因为在B/S模式下,个性化特点明显降低,无法实现具有个性化的功能要求,以鼠标为最基本的操作方式,难以满足快速操作的要求,页面动态刷新时,响应速度明显降低,无法实现分页显示,给数据库访问造成较大的压力,功能弱化,难以实现传统模式下的特殊功能要求,客户端只能实现浏览、查询、数据输入等简单功能,绝大部分工作由服务器承担,这使得服务器需要承受很重的负担。本文要介绍的就是利用一种新的开发技术和框架开发出具有C/S特性的B/S程序。现在一个被广泛提及的概念叫做(RIA)富客户端或者是富互联网应用程序,就是用Flex作为前端开发技术,对客户端进行开发,利用Flex技术可以在客户端尽可能的开发客户要求的界面,以达到客户定制的功能。Flex开发需要和后台服务器进行通信,本文将使用J2EE服务器同Flex进行数据交互。 【英文摘要】With the rapid development of computer hardware and network, C/S application which has been out of the market of enterprise application is refered to by customer again. Refering to C/S application is not caused by customer抯 following his heart. They hope to use applications with C/S抯 experience degree. The following will introduce the advantages and disadvantages of C/S developing mode.The C/S application responses fast and has beautiful UI(user interface). The C/S application also can be customized according to customer抯 requirement and implement complex business process. C/S application needs special client setup and its ability of distributed deployment is weak. Because a large number of clients don抰 have essentials for network, it抯 hard to deploy, install and configure quickly. It has great limitations when using defferent developing tool, such as high cost of developing and can be only developed by technical staff with some skills. Then B/S developing mode came into being. It is characterized by wide distribution and can be runned anytime and easy add functions and maintenance cost low and development cost low and sharing strong.The B/S applications hava