How to use Java to download a mp3 file online?

Question

I used the following method to download an mp3 file at : http://online1.tingclass.com/lesson/shi0529/43/32.mp3

But I got the following error :

java.io.FileNotFou

Answer 1

Using old-school Java IO, but you can map this to the NIO method you are using. Key thing is use of URLConnection.

    URLConnection conn = new URL("http://online1.tingclass.com/lesson/shi0529/43/32.mp3").openConnection();
    InputStream is = conn.getInputStream();

    OutputStream outstream = new FileOutputStream(new File("/tmp/file.mp3"));
    byte[] buffer = new byte[4096];
    int len;
    while ((len = is.read(buffer)) > 0) {
        outstream.write(buffer, 0, len);
    }
    outstream.close();

Answer 2

FileInputStream is used to access local files only. If you want to access the content of an URL you can setup an URLConnection or use something like this:

URL myUrl = new URL("http://online1.tingclass.com/lesson/shi0529/43/32.mp3");
InputStream myUrlStream = myUrl.openStream();
ReadableByteChannel myUrlChannel = Channels.newChannel(myUrlStream);

FileChannel destinationChannel=new FileOutputStream(To_File).getChannel();
destinationChannel.transferFrom(myUrlChannel, 0, sizeOf32MP3);

Or more simply just make a BufferedInputStream from myUrlStream and cycle the read/write operation until EOF is found on myUrlStream.

Cheers, Andrea

Answer 3

When you create a FileInputStream, you always access your local filesystem. Instead, you should use a URLConnection for accessing files over HTTP.

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