此程序是用JAVA写的FTP服务器端.在virtualroots设置FTP根目录，config设置FTP端口，users保存用户登陆帐号.-this program is written in Java FTP server. FTP virtualroots installed in the root directory, config set up FTP port, users keep users landing account.

最全面的基于TCP/IP的FTP服务器端要和我上传的客户端一起使用，还有聊天的功能，java程序代码，多线程设计，我花了将近二个月的时间-the most comprehensive TCP / IP-based FTP server to upload and my client used together, chat functions, java code, multithreaded design, I spent nearly two months of the time

所有前端后台代码封装过后十分精简易上手，出错效率低。同时支持移动客户端访问。(All front end background code is very simple and easy to use after encapsulation. Support mobile client access at the same time)