时间转换：秒转String

/**     * s2string     * @param cnt 秒     * @return     */    private String getStringTime(long cnt) {        long hour = cnt / 3600;        long min = cnt % 3600 / 60;        long second = cnt % 60;        return String.format(Locale.CHINA, "%02d:%02d:%02d", hour, min, second);    }