java gzip compress example

GZipTest.java

	private static void compress(byte[] in) throws IOException {
		System.out.println("before compress size: " + in.length);
		byte[] out = null;
		
		ByteArrayInputStream bi = new ByteArrayInputStream(in);
		
		ByteArrayOutputStream bo = new ByteArrayOutputStream(); 
		GZIPOutputStream go = new GZIPOutputStream(bo);
		
		byte[] bb = new byte[1024];
		while(bi.read(bb) != -1) 
			go.write(bb);
		out = bo.toByteArray();
		System.out.println("after compress size: " + out.length);
	}