package com.utils;

import java.text.ParseException;

import java.text.SimpleDateFormat;

import java.util.Calendar;

import java.util.Date;

public class BirthdayUtils {

    public static Date parse(String strDate) throws ParseException {

        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");

        return sdf.parse(strDate);

    }

    //由出生日期获得年龄

    public static int getAge(Date birthDay) throws Exception {

        Calendar cal = Calendar.getInstance();

        if (cal.before(birthDay)) {

            throw new IllegalArgumentException(

                    "The birthDay is before Now.It's unbelievable!");

        }

        int yearNow = cal.get(Calendar.YEAR);

        int monthNow = cal.get(Calendar.MONTH);

        int dayOfMonthNow = cal.get(Calendar.DAY_OF_MONTH);

        cal.setTime(birthDay);

        int yearBirth = cal.get(Calendar.YEAR);

        int monthBirth = cal.get(Calendar.MONTH);

        int dayOfMonthBirth = cal.get(Calendar.DAY_OF_MONTH);

        int age = yearNow - yearBirth;

        if (monthNow <= monthBirth) {

            if (monthNow == monthBirth) {

                if (dayOfMonthNow < dayOfMonthBirth) age--;

            } else {

                age--;

            }

        }

        return age;

    }

    public static void main(String args[]) {

        try {

            Long time = 89974800000l;

            Date date = new Date(time);

            int  age = BirthdayUtils.getAge(date);

            System.out.println("age=="+age);

        } catch (ParseException e) {

            e.printStackTrace();

        } catch (Exception e) {

            e.printStackTrace();

        }

    }

}