Java獲取兩個日期之間的所有日期集合

1.返回Date的list

private List<Date> getBetweenDates(Date start, Date end) {
    List<Date> result = new ArrayList<Date>();
    Calendar tempStart = Calendar.getInstance();
    tempStart.setTime(start);
    tempStart.add(Calendar.DAY_OF_YEAR, 1);
    
    Calendar tempEnd = Calendar.getInstance();
    tempEnd.setTime(end);
    while (tempStart.before(tempEnd)) {
        result.add(tempStart.getTime());
        tempStart.add(Calendar.DAY_OF_YEAR, 1);
    }
    return result;
}

2.返回yyyy-MM-dd的list

public static List<String> getDays(String startTime, String endTime) {

        // 返回的日期集合
        List<String> days = new ArrayList<String>();

        DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
        try {
            Date start = dateFormat.parse(startTime);
            Date end = dateFormat.parse(endTime);

            Calendar tempStart = Calendar.getInstance();
            tempStart.setTime(start);

            Calendar tempEnd = Calendar.getInstance();
            tempEnd.setTime(end);
            tempEnd.add(Calendar.DATE, +1);// 日期加1(包含結束)
            while (tempStart.before(tempEnd)) {
                days.add(dateFormat.format(tempStart.getTime()));
                tempStart.add(Calendar.DAY_OF_YEAR, 1);
            }

        } catch (ParseException e) {
            e.printStackTrace();
        }

        return days;
    }

 3.獲取指定時間的 00:00:00 23:59:59

// 獲得某天最大時間 2017-10-15 23:59:59
public static Date getEndOfDay(Date date) {
	LocalDateTime localDateTime = LocalDateTime.ofInstant(Instant.ofEpochMilli(date.getTime()), ZoneId.systemDefault());;
	LocalDateTime endOfDay = localDateTime.with(LocalTime.MAX);
	return Date.from(endOfDay.atZone(ZoneId.systemDefault()).toInstant());
}

// 獲得某天最小時間 2017-10-15 00:00:00
public static Date getStartOfDay(Date date) {
	LocalDateTime localDateTime = LocalDateTime.ofInstant(Instant.ofEpochMilli(date.getTime()), ZoneId.systemDefault());
	LocalDateTime startOfDay = localDateTime.with(LocalTime.MIN);
	return Date.from(startOfDay.atZone(ZoneId.systemDefault()).toInstant());
}

本文部分轉載自：https://www.cnblogs.com/heqiyoujing/p/9992429.html