根据当前日期转换成周几

日期转换成周几

	public static String getWeek(String day) {
		String week = "";
		try {
			DateTimeFormatter formatter = DateTimeFormatter.ofPattern( "yyyy-MM-dd" );
			LocalDate dayTime = LocalDate.parse(day,formatter);
			int weekDay = dayTime.getDayOfWeek().getValue();
			if(weekDay == 1) {
				week = "一";
			}else if(weekDay == 2) {
				week = "二";
			}else if(weekDay == 3) {
				week = "三";
			}else if(weekDay == 4) {
				week = "四";
			}else if(weekDay == 5) {
				week = "五";
			}else if(weekDay == 6) {
				week = "六";
			}else if(weekDay == 7) {
				week = "日";
			}
		} catch (Exception e) {
			e.printStackTrace();
			System.out.println("转换日期获取周几失败：" + e);
		}
		return week;
	}

PS:获取X年X月的天数

	public static int getDaysByMonth(int year, int month) {
		int days = 0;
		try {
			days = LocalDate.now().withYear(year).withMonth(month).lengthOfMonth();
		} catch (Exception e) {
			System.out.println("获取当月天数异常：" + e);
		}
		return days;
	}