code: public static int[] today() {
          Calendar today = Calendar.getInstance();
          int year = today.get(Calendar.YEAR);
          int month = today.get(Calendar.MONTH) + 1;
          int date = today.get(Calendar.DATE);
          return calElement(year, month, date);
      }
docs: 获取今天的农历日期
  
  @return 今天的农历日期数组，数组第一个元素是年，第二个元素是月，第三个元素是日