code: public static String getDateTimeDisp(String datetime) {
  		if ((datetime == null) || (datetime.equals("")))
  			return "";
  
  		DateFormat formatter = DateFormat.getDateTimeInstance(DateFormat.MEDIUM, DateFormat.MEDIUM);
  		long datel = Long.parseLong(datetime);
  		return formatter.format(new Date(datel));
  
  	}
docs: datetime is the String of System.currentTimeMillis() 返回标准中国（缺省）的时间显示格式