用java语言实现的ftp的上传和下载功能，测试非常正确，绝度有帮助！-Ftp using java language of the upload and download capabilities, testing is very accurate, never would have helped!

用java编写的简单的FTP功能与实现 注释详细 初学者建议-Using java to write a simple FTP functionality and implementation comments beginners recommended