用java写的一个基于局域网内的一个聊天系统，希望能够对大家有所帮助。-Use Java written by one of the local area network based on a chat system, the hope can be helpful to you.

实现P2P指定文件夹下的动态同步功能，支持新加入文件同步，不支持删除文件同步-when a peer establish a TCP connection with another peer, both of them will compare the lists of files they possess(assume that these shared files are stored in a designated folder in each peer), and proceed to