gzip stream

Use GZIPOutputStream ZipOutputStream packing the output
maybe it’s destination a file or a socket, it’s not the point. usually we use generic paradigm the reprecent the data source in stream and the compressed data out stream

public static void compress(InputStream is, OutputStream os)
              throws Exception {

    GZIPOutputStream gos = new GZIPOutputStream(os);

    int count;
    byte data[] = new byte[BUFFER];
    while ((count = is.read(data, 0, BUFFER)) != -1) {
        gos.write(data, 0, count);
    }

    gos.finish();
    gos.flush();
    gos.close();
}