使用socket编程实现聊天室和文件传输的功能，命令需要遵循一定的格式，在！help里面可以得到帮助。可以实现群聊，一对一聊天，以及一对一文件传输。-Socket programming using chat rooms and file transfer capabilities, the command to follow a certain format, in! help which can be helped. Can group chat, one on one chat, file transfer, and one to one.