This paper presents an analysis of several popularly used peer discovery methods and puts forward a new peer discovery method based on IP multicast technology. Using JXTA technology,the system framework is realized on Java TM 2platform.

• 该文分析了几种目前广泛使用的对等点定位方法的优势和不足,提出了基于IP多播技术的对等点定位方法,并运用JXTA技术在JavaTM2平台上予以实现。