3.获取某天的最大时间和最小时间，使用Calendar

 if (taxTraySummaryListDTO.getStartDate() != null) {
             Calendar cal = Calendar.getInstance();
             cal.setTime(taxTraySummaryListDTO.getStartDate());
             cal.set(Calendar.HOUR_OF_DAY, 0);
             cal.set(Calendar.MINUTE, 0);
             cal.set(Calendar.SECOND, 0);
             cal.set(Calendar.MILLISECOND, 0);
             taxTraySummaryListDTO.setStartDate(cal.getTime());
         }
         if (taxTraySummaryListDTO.getEndDate() != null) {
             Calendar cal = Calendar.getInstance();
             cal.setTime(taxTraySummaryListDTO.getEndDate());
             cal.set(Calendar.HOUR_OF_DAY, 23);
             cal.set(Calendar.MINUTE, 59);
             cal.set(Calendar.SECOND, 59);
             taxTraySummaryListDTO.setEndDate(cal.getTime());
         }