String dataString = "The quick brown fox jumps over the lazy dog";

byte[] compressed = Snappy.compress(dataString.getBytes("UTF-8"));

byte[] uncompressed = Snappy.uncompress(compressed);

String result = new String(uncompressed, "UTF-8");

System.out.println(result);

    /**

     * 输出如下：

     * Snappy.compress  压缩结果：2b a8 54 68 65 20 71 75 69 63 6b 20 62 72 6f 77 6e 20 66 6f 78 20 6a 75 6d 70 73 20 6f 76 65 72 20 74 68 65 20 6c 61 7a 79 20 64 6f 67

     * SnappyInputStream压缩结果：82 53 4e 41 50 50 59 00 00 00 00 01 00 00 00 01 00 00 00 2d 2b a8 54 68 65 20 71 75 69 63 6b 20 62 72 6f 77 6e 20 66 6f 78 20 6a 75 6d 70 73 20 6f 76 65 72 20 74 68 65 20 6c 61 7a 79 20 64 6f 67

     *                         |---------------------magic header(16bytes)-----|size(4bytes)|----compressed data-----

     */

    @Test

    public void testSnappyCompress() throws Exception {

        String dataString = "The quick brown fox jumps over the lazy dog";

​

        byte[] compressedData = Snappy.compress(dataString.getBytes());

        System.out.println("Snappy.compress  压缩结果：" + bytes2hex(compressedData));

​

        byte[] compressedData2 = compressSnappy(dataString.getBytes());

        System.out.println("SnappyInputStream压缩结果：" + bytes2hex(compressedData2));

    }

    /**

     * 将byte数组按16进制的方式输出

     */

    public static String bytes2hex(byte[] bytes) {

        StringBuilder sb = new StringBuilder();

        String tmp = null;

        for (byte b : bytes) {

            // 将每个字节与0xFF进行与运算，然后转化为10进制，然后借助于Integer再转化为16进制

            tmp = Integer.toHexString(0xFF & b);

            if (tmp.length() == 1) {

                tmp = "0" + tmp;

            }

            sb.append(tmp).append(" ");

        }

        return sb.toString();

    }