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¡¡¡¡MSSQLÖÐÌṩÁ˸ödatediffº¯ÊýÓÃÀ´¶ÔÁ½¸öʱ¼ä½øÐмõ·¨²Ù×÷£¬µ«ÔÚJavaÖÐȴûÓУ¬Èç¹ûÎÒÃÇÏëÖªµÀÁ½¸öÈÕÆÚ¼äÏà¸ôÁ˶àÉÙÌ죬»òÊÇÏà¸ôÁ˶àÉÙ¸öСʱÔòÒªÊÖ¹¤¼ÆËã¡£ÏÂÃæ´úÂëÄ£·ÂMSSQLµÄdatediffº¯ÊýÌṩÁËʹÓò»Í¬Ê±¼ä¼ä¸ôÀ´¼ÆËãÁ½¸öʱ¼äÏà²îµÄʱ¼ä¼ä¸ôµÄÊýÄ¿£¬±ÈÈçtimeIntervalΪdayÔò·µ»ØÏà²îµÄÌìÊý£¬ÎªmonthÔò·µ»ØÏà²îµÄÔÂÊý¡£×ܹ²Ö§³Öyear,quarter,month,week,day,hour,minute,secondÕ⼸ÖÖʱ¼ä¼ä¸ô£¬date1ºÍdate2ΪҪ¼ÆËãµÄÁ½¸öʱ¼ä£¬½á¹ûΪdate1¼õÈ¥date2ºóµÄÖµ¡£
 /**
  * °´Ö¸¶¨ÈÕÆÚµ¥Î»¼ÆËãÁ½¸öÈÕÆÚ¼äµÄ¼ä¸ô
  *
  * @param timeInterval
  * @param date1
  * @param date2
  * @return
  */
 public static long dateDiff(String timeInterval, Date date1, Date date2) {
  if (timeInterval.equals("year")) {
   Calendar calendar = Calendar.getInstance();
   calendar.setTime(date1);
   int time = calendar.get(Calendar.YEAR);
   calendar.setTime(date2);
   return time - calendar.get(Calendar.YEAR);
  }
  if (timeInterval.equals("quarter")) {
   Calendar calendar = Calendar.getInstance();
   calendar.setTime(date1);
   int time = calendar.get(Calendar.YEAR) * 4;
   calendar.setTime(date2);
   time -= calendar.get(Calendar.YEAR) * 4;
   calendar.setTime(date1);
   time += calendar.get(Calendar.MONTH) / 4;
   calendar.setTime(date2);
   return time - calendar.get(Calendar.MONTH) / 4;
  }
  if (timeInterval.equals("month")) {
   Calendar calendar = Calendar.getInstance();
   calendar.setTime(date1);
   int time = calendar.get(Calendar.YEAR) * 12;
   calendar.setTime(date2);
   time -= calendar.get(Calendar.YEAR) * 12;
   calendar.setTime(date1);
   time += calendar.get(Calendar.MONT


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