socket客户端和服务器，具有聊天，文件上传，下载的功能，文件上传、下载带有实时的进度条-socket client and server, chat, file upload and download function, file upload, download with real-time progress bar

一个程序为服务端，建立UDP服务端套接字 另外一个程序为客户端，建立UDP客户端套接字 这两个新程序可以互联，完成一个基于TCP/IP网络的文本聊天程序.-A procedure for the server, a UDP server socket another program for the client, UDP client socket the two new program can be interconnected, complete a chat program of TC

一个程序为服务端，建立UDP服务端套接字。 另外一个程序为客户端，建立UDP客户端套接字。 这两个新程序可以互联，完成一个基于TCP/IP网络的文本聊天程序。-A procedure for the server, a UDP server socket.Another program for the client, UDP client socket.The two new program can be interconnected, complete a chat program t