FTP退回到根目录

    ftpclient 退回到根目录 
//client.uploadfile("ftp/", filein, "test.jpg");<br><span style="background-color: #888888;"> //client.changeworkingdirectory("/home/neusoft/");<br></span>//client.uploadfile("ftp2/",filein, "test2.jpg");
如果知道层次可以 <span style="background-color: #888888;"> //client.changeworkingdirectory("../");</span>