技術標籤：後端

1.方法

	/**
	 * 獲取上(下)週週幾的日期
	 * 值範圍 {'SUNDAY': '星期日','MONDAY':'星期一','TUESDAY':'星期二','WEDNESDAY':'星期三','THURSDAY':'星期四','FRIDAY':'星期五','SATURDAY':'星期六'}
	 * @param weekOffset  周偏移，上週為-1，本週為0，下週為1，以此類推
	 */
	public static Date getDayOfWeek(int dayOfWeek, int weekOffset){
		Calendar date = Calendar.
 
getInstance(Locale.CHINA);
		//週數減一，即上週
		date.add(Calendar.WEEK_OF_MONTH,weekOffset);
		//日子設為周幾
		date.set(Calendar.DAY_OF_WEEK, dayOfWeek);
		//時分秒全部置0
		date.set(Calendar.HOUR_OF_DAY, 0);
		date.set(Calendar.MINUTE, 0);
		date.set(Calendar.SECOND, 0);
		date.set(Calendar.MILLISECOND, 0);
		return date.getTime
 
();
	}

2.測試

	@Test
	public void getDayOfWeekTest(){
		Date dayOfWeek = DateUtil.getDayOfWeek(Calendar.SATURDAY, -1);
		log.info("響應: "+dayOfWeek);
	}