用于通过ftps连接alfresco的Java代码

嗨，我正在尝试通过FTP连接我们的户外，但我得到了未知错误hostexception

我的代码如下

public void FTPTest()throws SocketException, IOException
{

    FTPClient ftp = new FTPClient();
    System.out.println("1");
      ftp.connect("172.17.178.144:2121"); // or "localhost" in your case
      System.out.println("2");
      System.out.println("login: "+ftp.login("admin", "admin"));
      System.out.println("3");
      ftp.changeWorkingDirectory("folder/subfolder/");
      // list the files of the current directory
      FTPFile[] files = ftp.listFiles();  
      System.out.println("Listed "+files.length+" files.");
      for(FTPFile file : files) {
       System.out.println(file.getName());
      }
       // lets pretend there is a JPEG image in the present folder that we want to copy to the desktop (on a windows machine)
      ftp.setFileType(FTPClient.BINARY_FILE_TYPE); // don't forget to change to binary mode! or you will have a scrambled image!
            FileOutputStream br = new FileOutputStream("C:\\Documents and Settings\\casonkl\\Desktop\\my_downloaded_image_new_name.jpg");

      ftp.retrieveFile("name_of_image_on_server.jpg", br);
      ftp.disconnect();

     }

我有以下错误

java.net.UnknownHostException:172.17.178.144:2121

---

您应该这样尝试，将端口设置为单独的参数

FTPClient ftp = new FTPClient();
ftp.connect("172.17.178.144","2121");
ftpClient.connect(server, port);

---

你能打172.17.178.144吗？FTP客户来自哪里？您确定不应该将端口作为第二个参数吗？谢谢您的回复，现在我可以将whwn passing ip和port作为两个参数连接起来，如ftp.connect172.17.178.1442121；但我无法通过它的发送登录，发送2220 FTP服务器就绪登录：false 3列出了0个文件。