输入相爱日期即可打印出两个人相爱的天数
package cn.jason.service;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.Scanner;
public class TestLove {
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");
}
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)
{
int timeDistance = 0 ;
for(int i = year1 ; i < year2 ; i ++)
{
if(i%4==0 && i%100!=0 || i%400==0)
{
timeDistance += 366;
}
else
{
timeDistance += 365;
}
}
return timeDistance + (day2-day1) ;
}
else
{
return day2-day1;
}
}
}