code: public static boolean isBetweenDate(String startDate, String endDate, Format format, String specificDate) {
          boolean result = false;
          List<String> dateList = getDayListBetween2Day(startDate, endDate, format);
          for (String date : dateList) {
              if (date.equalsIgnoreCase(specificDate)) {
                  return true;
              }
          }
          return result;
      }
docs: 判定一个日期specificDate是否在指定的起止日期startDate，endDate之间
  
  @param startDate
  @param endDate
  @param format
  @param specificDate
  
  @return
  
  @author kanghongwei