离线SaaS应用可以工作在时断时续的网络连接环境下,是一种环境可感知的智能SaaS软件.目前支持离线访问Web应用的研究成果较少,且其没有考虑到SaaS的特性,更没有形成构件化框架.为了解决上述问题,提出了离线SaaS框架OSF(Offline SaaS Framework),并给出了支持离线访问的面向操作的构件框架的结构和运行机制.通过案例描述验证了该构件框架的功能和性能.理论和实验表明,离线SaaS应用框架极大地改善了用户体验,保证了SaaS服务的可用性,扩大了SaaS的应用范围,同时还提高了系统开发效率.%Offline SaaS application is environment-appreciable smart software which can work with discontinuity connection. Currently there are a few research works about the offline Web application. They can't meet the requirements of SaaS,and can't take componentized framework into account. To solve the problems above,OSF (Offline SaaS Framework) was proposed. Firstly, the structures and mechanisms of operation-oriented component-based offline SaaS framework were proposed. And then a case study was introduced to verify the proposed framework. Theories and practices show that offline SaaS application framework promotes the users' experience, enforces the usability of SaaS service,and enhances the applied area of SaaS applications.
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