[数据结构与算法]Java根据出生日期计算星座

Java根据出生日期计算星座：

/**
	 * Java通过生日计算星座
	 * 
	 * @param birthday 2021-09-02
	 * @return
	 */
	public static String getConstellation(Date birthday) {

		Calendar calendar = Calendar.getInstance();
		calendar.setTime(birthday);
		int month = calendar.get(Calendar.MONTH) + 1;
		int day = calendar.get(Calendar.DAY_OF_MONTH);		
		int[] dayArr = new int[] { 20, 19, 21, 20, 21, 22, 23, 23, 23, 24, 23, 22 };
		String[] constellationArr = new String[] { "摩羯座", "水瓶座", "双鱼座", "白羊座", "金牛座", "双子座", "巨蟹座", "狮子座", "处女座", "天秤座",
				"天蝎座", "射手座", "摩羯座" };
		return day < dayArr[month - 1] ? constellationArr[month - 1] : constellationArr[month];
	}