中文摘要：

对等计算P2P因其潜在的技术优势和广阔的应用前景，近年来引起工业界和学术界的广泛关注。在重点研究P2P环境下文本共享与检索技术的基础上，实现了一个基于P2P的文本共享和检索系统。该系统通过灵活的节点加入策略、高效的索引机制、有效的路由策略，提供了基于元数据和内容等多种检索功能和友好的人机界面。应用部署证明系统具有很高的检索效率和跨平台数据的交换能力。

英文摘要：

Peer-to-peer （P2P） ,which has potential advantages in technology and can be applied to lots of systems,has attracted broad attentions in academia and industry. After comprehensively researching on text sharing and retrieval technology in P2P environment, in this paper a P2P based text sharing and retrieval system is realized. By means of flexible peer join policy ,effective indexing mechanism and routing policy, the system provides the retrieval functions which support various kinds of queries, such as metadata-based queries, content-based queries, etc, and has the friendly GUI. The applied deployment in many universities and institutions proves that our system is of high efficiency in retrieval and has the ability of data exchanging across different platforms.