十六进制字符串转二进制字符串

/**
     * 十六进制字符串转二进制字符串
     * @param hexStr 十六进制字符串
     * @return 二进制字符串
     */
    public static String hexToBin(String hexStr) {
        String hexToBinStr = "";
        try {
            hexToBinStr = Long.toBinaryString(Long.valueOf(hexStr, 16));
        } catch (NumberFormatException e) {
            e.printStackTrace();
        }
        return hexToBinStr;
    }