如何在Java中比较两个日期？

您可以像这样逐个比较价值

d1.getDate().equals(d2.getDate()) &&d1.getYear().equals(d2.getYear()) &&d1.getMonth().equals(d2.getMonth())

要么

Date date1 = new Date(d1.getYear(), d1.getMonth(), d1.getDate());Date date2 = new Date(d2.getYear(), d2.getMonth(), d2.getDate());date1.compareTo(date2);

如果您使用Date类，请考虑改用Calendar类这是最优雅的解决方案，为此使用Calendar和Comparator

public class CalendarDateWithoutTimeComparator implements Comparator<Calendar> {    public int compare(Calendar cal1, Calendar cal2) {        if(cal1.get(Calendar.YEAR) != cal2.get(Calendar.YEAR)) { return cal1.get(Calendar.YEAR) - cal2.get(Calendar.YEAR);        } else if (cal1.get(Calendar.MONTH) != cal2.get(Calendar.MONTH)) { return cal1.get(Calendar.MONTH) - cal2.get(Calendar.MONTH);        }        return cal1.get(Calendar.DAY_OF_MONTH) - cal2.get(Calendar.DAY_OF_MONTH);    }}

用法：

Calendar c1 = Calendar.getInstance();Calendar c2 = Calendar.getInstance();// these calendars are equalCalendarDateWithoutTimeComparator comparator = new CalendarDateWithoutTimeComparator();System.out.println(comparator.compare(c1, c2));List<Calendar> list = new ArrayList<Calendar>();list.add(c1);list.add(c2);Collections.sort(list, comparator);