FTP apache commons progress bar in java

Question

I'm working on a little program, which can upload a file to my FTP Server and do some other stuff with it. Now... It all works, i'm using the org.apache.commons.net.ftp FTPClient class for uploading.

ftp = new FTPClient();
ftp.connect(hostname);
ftp.login(username, password);

ftp.setFileType(FTP.BINARY_FILE_TYPE);
ftp.changeWorkingDirectory("/shares/public");
int reply = ftp.getReplyCode();

if (FTPReply.isPositiveCompletion(reply)) {
    addLog("Uploading...");
} else {
    addLog("Failed connection to the server!");
}

File f1 = new File(location);
in = new FileInputStream(

ftp.storeFile(jTextField1.getText(), in);

addLog("Done");

ftp.logout();
ftp.disconnect();

The file which should uploaded, is named in hTextField1. Now... How do i add a progress bar? I mean, there is no stream in ftp.storeFile... How do i handle this?

Thanks for any help! :)

Greetings

Stanley

Answer 1

You can do it using the CopyStreamListener, that according to Apache commons docs is the listener to be used when performing store/retrieve operations.

CopyStreamAdapter streamListener = new CopyStreamAdapter() {

    @Override
    public void bytesTransferred(long totalBytesTransferred, int bytesTransferred, long streamSize) {
       //this method will be called everytime some bytes are transferred

       int percent = (int)(totalBytesTransferred*100/yourFile.length());
       // update your progress bar with this percentage
    }

 });
ftp.setCopyStreamListener(streamListener);

Hope this helps

Eolith

Oh, thank you so much, that works! But now i got another problem... If i press on the button which uploads the file, the program freezes, and if the upload is done the full progressbar is full... – Stanley

That's because you do the upload in the GUI thread, so the GUI freezes, and waits for your upload to be done, a way to avoid that is using Threads, there is an example: Thread Example – Eolith

After hours of searching, finally found a solution that worked for me. +1! Thanks @BackSlash! – Vonnie