501 port not allow after EPSV ALL, active mode off错误

501 port not allow after EPSV ALL, active mode off错误

用sun的ftp包连接IBM aix服务器抛如下错误：
501 port not allow after EPSV ALL, active mode off

原因：
ftp要改为被动passtive模式.

解决方法：
使用第三方包edtftpj-1.5.1.jar连接服务器，在连接前设置模式为passtive

Demo

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

package app4;

/**
 * <p>Title: </p>
 *
 * <p>Description: </p>
 *
 * <p>Copyright: Copyright (c) 2006</p>
 *
 * <p>Company: </p>
 *
 * @author not attributable
 * @version 1.0
 */
import com.enterprisedt.net.ftp.FTPClient;
import com.enterprisedt.net.ftp.FTPMessageCollector;
import com.enterprisedt.net.ftp.FTPTransferType;
import com.enterprisedt.net.ftp.FTPConnectMode;
import com.enterprisedt.util.debug.Level;
import com.enterprisedt.util.debug.Logger;
import java.util.Date;
import java.io.File;

public class Demo {
    /**
     *  Log stream
     */
    private static Logger log = Logger.getLogger(Demo.class);

    public static void main(String[] args) {

        // we want remote host, user name and password
//        if (args.length < 3) {
//            usage();
//            System.exit(1);
//        }

        // assign args to make it clear
        String host = "localhost";//args[0];
        String user = "lijun2";//args[1];
        String password = "836301";//args[2];

        Logger.setLevel(Level.ALL);

        FTPClient ftp = null;

        try {
            // set up client
            log.info("Connecting");

            ftp = new FTPClient(host);
            FTPMessageCollector listener = new FTPMessageCollector();
            ftp.setMessageListener(listener);

            // login
            log.info("Logging in");
            ftp.login(user, password);

            // set up passive ASCII transfers
            log.debug("Setting up passive, ASCII transfers");
            ftp.setConnectMode(FTPConnectMode.PASV);
            ftp.setType(FTPTransferType.BINARY);

            // get directory and print it to console           
            log.debug("Directory before put:");
            String[] files = ftp.dir(".", true);
            for (int i = 0; i < files.length; i++)
                log.debug(files[i]);

            // copy file to server
            System.out.println(new Date());
            log.info("Putting file");
            File loadfile = new File("a.ISO");
           
            ftp.put("a.ISO", "a.ISO");
           
            System.out.println(new Date());
            // get directory and print it to console           
            log.debug("Directory after put");
            files = ftp.dir(".", true);
            for (int i = 0; i < files.length; i++)
                log.debug(files[i]);

            // copy file from server
           // log.info("Getting file");
           // ftp.get("2005.doc" + ".copy", "2005.doc");

            // delete file from server
            //log.info("Deleting file");
           // ftp.delete("test.txt");

            // get directory and print it to console           
           // log.debug("Directory after delete");
            files = ftp.dir("", true);
            for (int i = 0; i < files.length; i++)
                log.debug(files[i]);

            // Shut down client               
            log.info("Quitting client");
            ftp.quit();

            String messages = listener.getLog();
            log.debug("Listener log:");
            log.debug(messages);

            log.info("Test complete");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public static void usage() {

        System.out.println("Usage: Demo remotehost user password");
    }

}