File download with java - Files corrupted

Question

Here is my code.i write this to download mp3 flies,video files & images. i used FileOutputStream for handling files.. All files are downloading well.. mp3 files are working..but images and videos are corrupted

private void download(String fileURL, String destinationDirectory,String name) throws IOException {

        // File name that is being downloaded
        String downloadedFileName = name;
        // Open connection to the file
        URL url = new URL(fileURL);

        InputStream is = url.openStream();
        // Stream to the destionation file
        FileOutputStream fos = new FileOutputStream(destinationDirectory + "/" + downloadedFileName);

        // Read bytes from URL to the local file
        byte[] buffer = new byte[4096];
        int bytesRead = 0;

        System.out.println("Downloading " + downloadedFileName);
        while ((bytesRead = is.read(buffer)) != -1) {
            fos.write(buffer, 0, bytesRead);
        }

        // Close destination stream
        fos.close();
        // Close URL stream
        is.close();
    }

Answer 1

Take a look at such libraries as Apache IO . It has many helper methods such as redirecting streams .

Answer 2

I tried your routine. Works fine for me.

I used the URL

" http://www.stephaniequinn.com/Music/Allegro%20from%20Duet%20in%20C%20Major.mp3 "

and got a playable MP3 file of exactly 1,430,174 bytes.

Next I tried JPEG:

" http://weknowyourdreams.com/images/beautiful/beautiful-01.jpg "

works fine.

I suspect what happened is that you used URL of a web page instead of the audio/video/pic file by mistake. For example, if you used the URL

" http://weknowyourdreams.com/image.php?pic=/images/beautiful/beautiful-01.jpg "

instead of the one above, you will not get a proper JPG. You'll have to use "View Image" or "Copy Image Location" in your browser.

Answer 3

You can try this code,

URLConnection con = new URL(fileURL).openConnection();
    InputStream is = con.getInputStream();
    OutputStream fos = new FileOutputStream(new File(destinationDirectory + "/" + name));
    byte[] buffer = new byte[4096];
    int bytesRead;
    while ((bytesRead = is.read(buffer)) > 0) {
        fos.write(buffer, 0, bytesRead);
    }
    fos.close();

Answer 4

you need to use BufferedOutputStream.

BufferedOutputStream bos = new BufferedOutputStream(fos );

like this :

private void download(String fileURL, String destinationDirectory,String name) throws IOException {

        // File name that is being downloaded
        String downloadedFileName = name;
        // Open connection to the file
        URL url = new URL(fileURL);

        InputStream is = url.openStream();
        // Stream to the destionation file
        FileOutputStream fos = new FileOutputStream(destinationDirectory + "/" + downloadedFileName);
        BufferedOutputStream bos = new BufferedOutputStream(fos );

        // Read bytes from URL to the local file
        byte[] buffer = new byte[4096];
        int bytesRead = 0;

        System.out.println("Downloading " + downloadedFileName);
        while ((bytesRead = is.read(buffer)) != -1) {
            bos.write(buffer, 0, bytesRead);
        }

        bos.flush();
        // Close destination stream
        bos.close();
        // Close URL stream
        is.close();
    }