/**     * 将二进制转换成16进制     *      * @param buf     * @return     */    public static String parseByte2HexStr(byte buf[]) {        StringBuffer sb = new StringBuffer();        for (int i = 0; i < buf.length; i++) {            String hex = Integer.toHexString(buf[i] & 0xFF);            if (hex.length() == 1) {                hex = '0' + hex;            }            sb.append(hex.toUpperCase());        }        return sb.toString();    }    /**     * 将16进制转换为二进制     *      * @param hexStr     * @return     */    public static byte[] parseHexStr2Byte(String hexStr) {        if (hexStr.length() < 1)            return null;        byte[] result = new byte[hexStr.length() / 2];        for (int i = 0; i < hexStr.length() / 2; i++) {            int high = Integer.parseInt(hexStr.substring(i * 2, i * 2 + 1), 16);            int low = Integer.parseInt(hexStr.substring(i * 2 + 1, i * 2 + 2), 16);            result[i] = (byte) (high * 16 + low);        }        return result;    }