类似qq的局域网聊天工具源码实例，首先是登录界面，填写用户名和密码进入聊天列表，用户之间可以相互通信聊天，包含客户端和服务端。基于tcp/udp协议的通信。-LAN chat tools qq similar source code examples, the first is the login screen, fill in the user name and password to enter the chat list, you can chat with each other to c