【作者】 张安勤；

【导师】 周晓峰；

【作者基本信息】 河海大学 ， 计算机应用技术， 2005， 硕士

【摘要】 随着Internet的迅猛发展，基于Internet的应用系统的逐渐增多，构件的交互范围已经进一步扩大并分布在整个Internet上。我们要把整个复用环境放到大的广域网甚至Internet上。现有的构件技术难以有效地适应或基本不能适应Internet环境所呈现出来的异构、开放、动态和多变性等特征。构件技术需要与其他相关技术紧密地融合，自身也需要更深一步的拓展。在这种背景下，产生了Web构件。 对构件的适当的描述有助于有效的表示、开发、理解、修改和复用构件，在构件技术中的关键是构件的描述。传统构件的描述已不能适应Internet环境下web构件的发展，为了解决这个问题，论文对Web构件的描述方面进行研究。在论文中给出了Web构件的结构，总结了Web构件的特征和功能，概括出Web构件的描述模型，最后构建了Web构件描述语言——WebCDL。 本文主要的工作如下： 首先，研究软件构件的描述以及在Internet环境下web构件的结构和web构件的独特的性质和功能； 其次，在分析传统构件的描述和Internet运作机理的基础上，抽象、概括出Web构件的描述模型； 最后，充分研究Webservices的WSDL描述并对WSDL进行扩充，构建Web构件描述语言——WebCDL。并给出了用WebCDL对水利领域web构件进行描述的实例。更多还原

【Abstract】 With the rapid development of Internet, more and more application systems based on Internet appeared and the scope of the interaction between component was extended and distributed on the whole Internet. Meanwhile, Internet has some characters such as heterogeneous, opening, dynamics and more changerable and the component technique can’t accommodate to these characters. So components need to combine with other related techniques and at the same time they themselves need profound development. On the circumstance, the concept Web component appears.The traditional component description can’t accommodate to the component development in the Internet environment. To solve this problem, this paper did some research on the web component description. We presented the structure of the web component, summarized the characters and functions of web component and generalized the description model. In the end, we designed the description language of web component - WebCDL.1 We studied the description of software component and the structure, characters and functions of web component on the circumstances of Internet.2 On the basis of study of traditional component description and operation mechanism of Internet, We abstracted and summarized the description model of web component.3 We researched fully WSDL of Webservices, then expanded WSDL and designed web component description language - WebCDL. In the end, we gave an example of the rain query web component description in the field of water conservancy.更多还原