基于JXTA编写的p2p程序，实现了基本的聊天功能，对等组的建立，加入对等组，对等点发现以及文件共享等功能。-JXTA-based p2p program prepared to achieve the basic chat functions, the establishment of peer-to-peer group, by adding peer-to-peer groups, peer discovery and file sharing functions.