程序代码：

import *;

import *;

import java.util.*;


public class JMyFtpClient {
    /*Members*/
private FTPClientDrv m_FtpClient;

    /**
     *
     */
    public JMyFtpClient() {
        super();
        // TODO Auto-generated constructor stub   
        m_FtpClient = null;
    }

    public static void main(String[] args)
        throws ClassNotFoundException, IOException {
        System.out.println("JMyFtpClient Started");

        JMyFtpClient ftp = new JMyFtpClient();

        if (false == ftp.Open("172.16.64.21", 21, "application", "application")) {
            System.out.println("OpenFail");

            return;
        }

        if (false == ftp.DownloadDirectory("/appl/Tmpww", "C:\\TmpWw\\Down")) {
            trace("download Fail");
        }

        /*      if ( false == ftp.UploadDirectory( "C:\\TmpWw" , "/appl/Tmpww") )
                    trace( "Uplaod Directpry Fail" );
                else
                    trace( "Upload Directory Success" );
        */

        /*      for ( int i=0; i < 0; i++ )
                {

                    int nByteDown = ftp.DownloadFile( "appl/3.txt" , "c:\\TmpWw\\Temp\\12" + i + ".txt" );
                    if ( nByteDown <= 0 )
                        System.out.println( "Download File Fail" );
                    else
                        trace( "Download File Success" );


                    int nByteUp = ftp.UploadFile( "C:\\TmpWw\\1.txt" , "appl/Tmp/Tmp2/1" + i + ".txt" );
                    if ( nByteUp <= 0 )
                        System.out.println( "Upload File Fail" );
                    else
                        trace( "Upload File Success" );
                }
        */
        ftp.Close();

        System.out.println("JMyFtpClient Stopped");
    }

    /*Open Connection*/
    public boolean Open(String strServIPAddr, int nServPort,
        String strUserName, String strPassword) {
        try {
            m_FtpClient = new FTPClientDrv(strServIPAddr, nServPort); //Connect to Server

            m_FtpClient.login(strUserName, strPassword);

            m_FtpClient.setType(new FTPTransferType());
        } catch (IOException e) {
            trace("Open Ftp Server Fail, IOException");
            e.printStackTrace();

            return false;
        } catch (FTPException e) {
            trace("Open Ftp server Fail, Ftp Exception");
            e.printStackTrace();

            return false;
        }

        trace("Login FTP Server Ok");

        return true;
    }