public static  void copy(InputStream input,
    OutputStream output) throws IOException 
{
  //--------------------------------------------------------------------------
  //   Protected Variables:
  //--------------------------------------------------------------------------
  //--------------------------------------------------------------------------
  //   Private Variables:
  //--------------------------------------------------------------------------
  //--------------------------------------------------------------------------
  //   Constructors:
  //--------------------------------------------------------------------------
  //--------------------------------------------------------------------------
  //   Public Methods:
  //--------------------------------------------------------------------------
    copy(input, output, DEFAULT_BUFFER_SIZE);
}

Copies information from the input stream to the output stream using a default buffer size of 2048 bytes.

 public static  void copy(InputStream input,
    OutputStream output,
    int bufferSize) throws IOException 
{
    byte[] buf = new byte[bufferSize];
    int bytesRead = input.read(buf);
    while (bytesRead != -1) {
      output.write(buf, 0, bytesRead);
      bytesRead = input.read(buf);
    }
    output.flush();
}

Copies information from the input stream to the output stream using the specified buffer size

 public static  void copyThenClose(InputStream input,
    OutputStream output) throws IOException 
{
    copy(input, output);
    input.close();
    output.close();
}

Copies information between specified streams and then closes both of the streams.

 public static byte[] getBytes(InputStream input) throws IOException 
{
    ByteArrayOutputStream result = new ByteArrayOutputStream();
    copy(input, result);
    result.close();
    return result.toByteArray();
}