Count the number of days two people have been in love

Enter the love date to print out the number of days that two people have been in love

package cn.jason.service;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.Scanner;

/**
 * @author Jason
 * @date 2020年2月17日09:27:38
 * @deprecated 计算两个人相爱天数
 */
public class TestLove {
    
    

	/**
     * 运行主方法
     * @param args
     * @throws ParseException
     */
    public static void main(String[] args) throws ParseException {
    
    

        System.out.print("请输入开始时间(例如：2019-12-21)：");
        Scanner scanner = new Scanner(System.in);
        String in = scanner.next();
        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd");
        Date startDate = simpleDateFormat.parse(in);
        Date nowDate = new Date(System.currentTimeMillis());
        System.out.println("相爱：" + differentDays(startDate,nowDate) + "天");

    }

    /**
     * 计算传入的两个时间相差的天数
     * @param date1
     * @param date2
     * @return
     */
    public static int differentDays(Date date1,Date date2)
    {
    
    
        Calendar cal1 = Calendar.getInstance();
        cal1.setTime(date1);

        Calendar cal2 = Calendar.getInstance();
        cal2.setTime(date2);
        int day1= cal1.get(Calendar.DAY_OF_YEAR);
        int day2 = cal2.get(Calendar.DAY_OF_YEAR);

        int year1 = cal1.get(Calendar.YEAR);
        int year2 = cal2.get(Calendar.YEAR);
        if(year1 != year2)   //不同一年
        {
    
    
            int timeDistance = 0 ;
            for(int i = year1 ; i < year2 ; i ++)
            {
    
    
                if(i%4==0 && i%100!=0 || i%400==0)    //闰年
                {
    
    
                    timeDistance += 366;
                }
                else    //不是闰年
                {
    
    
                    timeDistance += 365;
                }
            }

            return timeDistance + (day2-day1) ;
        }
        else    //同一年
        {
    
    
            return day2-day1;
        }
    }

}