用java 实现的 即时通信系统 功能还可以 挺值得学习的-Real-time communication with the java implementation of system functions can also be very worthwhile to learn

聊天软件，简单的聊天工具，类似于qq聊天，简单方便，简单实用(liao tian ruanjian jian dan shi yong jian dan fang bian jian dan de liao tian gong ju)