Simple stream copy function

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2015-04-21 Simple stream copy function

Simple function to copy a stream to another.

CopyStream.java

public static void copyStream(InputStream is, OutputStream os) throws IOException {
        try (
                ReadableByteChannel input = Channels.newChannel(is);
                WritableByteChannel output = Channels.newChannel(os)
        ) {
            final ByteBuffer buffer = ByteBuffer.allocateDirect(65536);
            while (input.read(buffer) != -1) {
                buffer.flip();
                output.write(buffer);
                buffer.compact();
            }
            buffer.flip();
            while (buffer.hasRemaining())
                output.write(buffer);
        }
    }