/**
	 * @param start 開始時間 格式yyyymmdd
	 * @param end 結束時間 格式yyyymmdd
	 * @return list<string>期間的所有日期
	 */
	public static List<String> compeleteDate(String start,String end) {
		ArrayList<String> aList = new ArrayList<String>();
	    SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd");
	    int num = 0;
	    Calendar c1 = Calendar.getInstance();
	    Calendar c2 = Calendar.getInstance();
	    try {
			Date date1=sdf.parse(start);
			Date date2 = sdf.parse(end);
			c1.setTime(date1);
			c2.setTime(date2);
			num = c2.get(Calendar.DAY_OF_YEAR)-c1.get(Calendar.DAY_OF_YEAR);
		} catch (ParseException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	    
	    if (num == 0) {
	    	return null;
		}
	    for ( int i = 0 ; i <= num;i++) {
	    	aList.add(sdf.format(c1.getTime()));
	    	c1.add(Calendar.DAY_OF_YEAR, 1 );
			
		}
	    
		return aList;
	
	}