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(Java) FTP Download with Progress Event Callbacks

FTP download with progress event callbacks.

Chilkat Java Downloads

Java Libs for Windows, Linux, Alpine Linux,
MAC OS X, Solaris, FreeBSD, OpenBSD,
Raspberry Pi and other single board computers

Java Libs for Android

import com.chilkatsoft.*;

public class ftpProgress extends CkFtp2Progress
  {

  public boolean PercentDone(int percentDone)
    {
    boolean abort = false;
    System.out.println("Percent Done: " + percentDone);
    // Return true to abort, false to continue.
    return abort;
    }

  public void ProgressInfo(String name, String value)
    {
    System.out.println(name + ": " + value);
    return;
    }

};

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    CkFtp2 ftp = new CkFtp2();
    ftpProgress ftp_progress = new ftpProgress();
    ftp.put_EventCallbackObject(ftp_progress);

    //  Any string unlocks the component for the 1st 30-days.
    boolean success = ftp.UnlockComponent("Anything for 30-day trial");
    if (success != true) {
        System.out.println(ftp.lastErrorText());
        return;
        }

    ftp.put_Hostname("ftp.someFtpServer.com");
    ftp.put_Username("myLogin");
    ftp.put_Password("myPassword");

    //  Connect and login to the FTP server.
    success = ftp.ConnectOnly();
    if (success != true) {
        System.out.println(ftp.lastErrorText());
        return;
        }

    success = ftp.LoginAfterConnectOnly();
    if (success != true) {
        System.out.println(ftp.lastErrorText());
        return;
        }

    //  Change to the remote directory where the file is located.
    //  This step is only necessary if the file is not in the home directory
    //  of the FTP account.
    success = ftp.ChangeRemoteDir("junk");
    if (success != true) {
        System.out.println(ftp.lastErrorText());
        return;
        }

    String localFilename = "c:/temp/hamlet.xml";
    String remoteFilename = "hamlet.xml";

    //  Ensure that we get PercentDone callbacks.
    ftp.put_AutoGetSizeForProgress(true);

    //  Download the file.
    success = ftp.GetFile(remoteFilename,localFilename);
    if (success != true) {
        System.out.println(ftp.lastErrorText());
        return;
        }

    success = ftp.Disconnect();

    System.out.println("File Downloaded!");
  }
}

 

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