java.util.zip

//压缩
Deflater compressor = new Deflater();
compressor.setLevel(Deflater.BEST_COMPRESSION);
compressor.setInput(input);
compressor.finish();
ByteArrayOutputStream bos = new ByteArrayOutputStream(input.length);
byte[] buf = new byte[1024];
while (!compressor.finished()) {
	int count = compressor.deflate(buf);
	bos.write(buf, 0, count);
}
byte[] compressedData = bos.toByteArray();
//解压
bos.reset();
bos = new ByteArrayOutputStream(compressedData.length);
Inflater decompressor = new Inflater();
decompressor.setInput(compressedData);
while (!decompressor.finished()) {
	try {
		int count = decompressor.inflate(buf);
		 bos.write(buf, 0, count);
	} catch (DataFormatException e) {
	}
}
bos.close();
byte[] decompressedData = bos.toByteArray();