GzipOutputStream及GzipInputStream的用法

ByteArrayOutputStream arrayOutputStream ＝new ByteArrayOutputStream();
GZIPOutputStream gop = new GZIPOutputStream(arrayOutputStream);
byte[] buffer = new byte[1024];
int len = 0;
while ((len = inputStream.read(buffer)) != -1) {
	gop.write(buffer, 0, len);
}
gop.finish(); //这个在写入arrayOutputStream时一定要有，否则不能完全写入
gop.close;

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Header encoding = method.getResponseHeader("Content-Encoding");
		if (encoding != null) {
			if (encoding.getValue().equals("gzip")) {
				bytes = GZipUtil.unzip(bytes);
			}
		}


public static byte[] unzip(InputStream in) throws IOException {
		// Open the compressed stream
		GZIPInputStream gin = new GZIPInputStream(in);

		ByteArrayOutputStream out = new ByteArrayOutputStream();

		// Transfer bytes from the compressed stream to the output stream
		byte[] buf = new byte[size];
		int len;
		while ((len = gin.read(buf)) > 0) {
			out.write(buf, 0, len);
		}

		// Close the file and stream
		gin.close();
		out.close();
		return out.toByteArray();
	}