计算Java中日期的差异

import java.time.LocalDate;
import java.time.Period;

public class DateDifference {
    public static void main(String[] args) {
        LocalDate date1 = LocalDate.of(2021, 1, 1);
        LocalDate date2 = LocalDate.of(2021, 12, 31);

        Period period = Period.between(date1, date2);

        System.out.println("年份差异：" + period.getYears());
        System.out.println("月份差异：" + period.getMonths());
        System.out.println("天数差异：" + period.getDays());
    }
}

年份差异：0
月份差异：11
天数差异：30