【作者】 张炤峰；

【导师】 杨大全；

【作者基本信息】 沈阳工业大学 ， 计算机技术， 2007， 硕士

【摘要】 Peer-to-peer(P2P)技术的一个优势便是开发出强大的搜索工具。P2P技术使用户能够深度搜索文档，而且这种搜索无需通过Web服务器，也可以不受信息文档格式和宿主设备的限制，可达到传统目录式搜索资源无可比拟的深度。P2P网络使节点以更自由、更主动的方式加入和离开网络，共享信息资源。如何方便快捷地定位、搜索这些资源，从而合理有效的利用它们，成为人们所关注的焦点问题。本论文首先对P2P技术进行了概述，包括P2P的定义、P2P模式与C／S模式的比较、P2P的特点以及P2P技术在搜索方面的应用及优势；其次对P2P搜索算法进行了分类探讨，重点研究和分析了几种P2P搜索算法，并指出它们的优缺点。最后在JXTA架构基础上，设计并实现了共享资源搜索网络系统，实现了在对等网络中资源的共享、搜索和下载，并指出了系统在设计中的不足，并对以后的工作提出了展望。通过实验证明了与传统的搜索引擎相比较，P2P模式下的共享资源搜索系统的优势在于：(1)信息搜索的实时性。搜索到的信息都是各对等点上的实时信息而非过时的信息。(2)信息搜索的深度。通过使用XML格式对元数据进行描述，可以共享任何格式的文件。只要各对等点同意共享发布的文件都可以搜索到。搜索的深度是传统的搜索技术无法相比的。更多还原

【Abstract】 The advantage of the P2P technology is to develop the strong search tool. The P2P technology makes the users search document deeply, and this kind of search needn’t through the Web Server, it also isn’t limited by information document format and host device, so the much more deep than the traditional directory search resource can be reached. In peer-to-peer network nodes can join and leave freely and actively. It is a focus issue how to locate or lookup the resources so that we can make use of them.Firstly, in this paper, the P2P technology was summarized, includes the definition of P2P, the difference between P2P mode and C/S mode, the characteristic of P2P, the applications and advantages using P2P technology in search.Secondly, the P2P search arithmetics were probed into class, there are some kind of P2P search arithmetics were researched and analyzed, then points out their advantage and disadvantage. At last, base on the JXTA architecture, designs and realizes share resource search network, realizes the share, search and download in P2P network, and points out the shortage in the system designing, and points out the prospect of the subject for the future.Proved through an experiment, the searching engine of the share resources system under the p2p mode has the advantage to compare the traditional mode to lie in:(1) Real-time information searches. The informations is real time for searching are all each peers, rather than dated information.(2)The depth that the information searches.Pass usage XML a format to carry on a description to the Metada based, it can share any files of format. As long as each peer approval share releases of the files all can be searched. The depth of searching searches what technique kick the beam traditionally.更多还原