字符串转十六进制字符函数

  private byte[] getHexBytes(String message) {
        int len = message.length() / 2;
        char[] chars = message.toCharArray();
        String[] hexStr = new String[len];
        byte[] bytes = new byte[len];
        for (int i = 0, j = 0; j < len; i += 2, j++) {
            hexStr[j] = "" + chars[i] + chars[i + 1];
            bytes[j] = (byte) Integer.parseInt(hexStr[j], 16);
        }
        return bytes;
    }

http://blog.youkuaiyun.com/phenixyf/article/details/51697887