docs: public int getSeconds() {
  		// TODO ahai 如果当月时间未到呢？
  		Calendar cld = Calendar.getInstance();
  		cld.add(Calendar.MONTH, 1);
  		cld.set(Calendar.DAY_OF_MONTH, day);
  		cld.set(Calendar.HOUR_OF_DAY, this.hour);
  		cld.set(Calendar.MINUTE, this.minute);
  		cld.set(Calendar.SECOND, this.second);
  		long time = cld.getTimeInMillis();
  		long diff = time - System.currentTimeMillis();
  		if (diff <= 0) {// 一定要小于等于0
  			// 本周的时间已过，下周再执行
  			diff += 7 * 24 * 60 * 60 * 1000L;
  		}
  		int seconds = (int) (diff / 1000);
  		return seconds;
  	}