通过生日计算星座和年龄

/**
     * 计算星座
     */public static String getConstellation(String birthday) {

        String[] constellationArr = {"水瓶座", "双鱼座", "牡羊座", "金牛座", "双子座", "巨蟹座", "狮子座", "处女座", "天秤座",
                "天蝎座", "射手座", "魔羯座"};
        int[] constellationEdgeDay = {20, 19, 21, 21, 21, 22, 23, 23, 23, 23, 22, 22};
        SimpleDateFormat formatDate = new SimpleDateFormat("yyyy-MM-dd");
        try {
            Date birthDay = formatDate.parse(birthday);
            int month = birthDay.getMonth();
            int day = birthDay.getDay();
            if (day < constellationEdgeDay[month]) {
                month = month - 1;
            }
            if (month >= 0) {
                return constellationArr[month];
            }
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return constellationArr[11];
    }

    /**
     * 计算年龄
     */
    public static int getAgeByBirth(Date birthday) {
        int age = 0;
        try {
            Calendar now = Calendar.getInstance();
            now.setTime(new Date());// 当前时间

            Calendar birth = Calendar.getInstance();
            birth.setTime(birthday);

            if (birth.after(now)) {//如果传入的时间，在当前时间的后面，返回0岁
                age = 0;
            } else {
                age = now.get(Calendar.YEAR) - birth.get(Calendar.YEAR);
                if (now.get(Calendar.DAY_OF_YEAR) > birth.get(Calendar.DAY_OF_YEAR)) {
                    age += 1;
                }
            }
            return age;
        } catch (Exception e) {//兼容性更强,异常后返回数据
            return 0;
        }
    }