java 计算日期之间的时间间隔
LocalDate localDate = LocalDate.now(); //当前时间
LocalDate birthday = LocalDate.of(2011,10,9);//要计算的时间
Period betweenDate = Period.between(birthday, localDate); //计算时间间隔
System.out.println("year:"+betweenDate.getYears());
System.out.println("months:"+betweenDate.getMonths());
System.out.println("day:"+betweenDate.getDays());
运行结果: