java 1.5 服务端管理 客户端登录验证，新用户注册，收发消息，单聊，群聊-java 1.5 server management client login authentication, new user registration, send and receive messages, single chat, group chat

这是一个客户端与服务端进行通信的java小程序，使用socket通信，当从客户端输入窗口提示的通关语，则会在窗口显示从服务器端发来的通过信息。-This is a client and server-side java applets to communicate using socket communication, input from the client window when the prompt clearance language, will be displayed in the

java开发的网络聊天程序，包括客户端和服务端，支持留言和文件传输。需要注意的是在com.chat.db包中DBUtil.java配置数据库参数。-The development of Java network chat program, including client and server, support for message and file transfer. Note that in the com.chat.db package in the DBUtil.java config