Java擷取輸入日期是星期幾

1.根據日期擷取星期

/**
	 * @name: getWeekOfDate()
	 * @param: date
	 * @return: week
	 */
	public String getWeekOfDate(Date date){
		String[] arrayWeek={"Sun","Mon","Tues","Wed","Thur","Fir","Sat"};
		Calendar cal = Calendar.getInstance();
		cal.setTime(date);
		int w = cal.get(Calendar.DAY_OF_WEEK);
	    return arrayWeek[w-1];
	}
           

 2.将字元類型格式化為規定格式的日期類型

/**
	 * @name: formatDate()
	 * @param: dateStr
	 * @return: date
	 */
	public Date formatDate(String dateStr) throws ParseException{
		SimpleDateFormat df =new SimpleDateFormat("yyyy-MM-dd");
		Date date = df.parse(dateStr);
		return date;
	}
           

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原文連結：https://blog.csdn.net/weixin_33755554/article/details/92609153