(Java) FTP Download with Progress Event Callbacks

FTP download with progress event callbacks.

Chilkat Java Downloads Java Libs for Windows, MacOS, Linux, Alpine Linux 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[])
  {
    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    CkFtp2 ftp = new CkFtp2();
    ftpProgress ftp_progress = new ftpProgress();
    ftp.put_EventCallbackObject(ftp_progress);

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

    // Connect and login to the FTP server.
    boolean 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!");
  }
}