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    private static final String STR = "0123456789abcdef";    

    /**
     * 16进制转字符
     * @param hexStr （“010000000000”）
     * @return
     */
    private static String hexStr2Str(String hexStr) {
        char[] hexs = hexStr.toCharArray();
        byte[] bytes = new byte[hexStr.length() / 2];
        int n;
        for (int i = 0; i < bytes.length; i++) {
            n = STR.indexOf(hexs[2 * i]) * 16;
            n += STR.indexOf(hexs[2 * i + 1]);
            bytes[i] = (byte) (n & 0xff);
        }
        return new String(bytes);
    }