多线程Ftp测试网络速度，自己编写的一个小程序,要求测试机开通Ftp服务端口21，测试帐号有写权限，ftp根目录下有temp目录，Linux用的较多-multithreading Ftp test network speeds and prepare themselves in a small procedure that requires testing services Ftp opened 21 ports, a test account write access, ftp root di