code: public static boolean isBetweenDate(Date startDate, Date endDate, Date specificDate) {
          long startTm = getDateCeil(startDate).getTimeInMillis();
          long endTm = getDateCeil(endDate).getTimeInMillis();
          long specificTm = getDateCeil(specificDate).getTimeInMillis();
  
          if (startTm <= specificTm && endTm >= specificTm) {
              return true;
          }
          return false;
      }
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 specificDate
  
  @return
  
  @author kanghongwei