3

我尝试使用以下方法查找天数，

public static int findNoOfDays(int year, int month, int day) {
        Calendar calendar = Calendar.getInstance();
        calendar.set(year, month - 1, day);
        int days = calendar.getActualMaximum(Calendar.DAY_OF_MONTH);
        return days;
    }

同样，我想通过给出开始日期和结束日期来获取天数并获取天数excluding Saturday and Sunday。

4

5 回答 5

6

这是一种计算两个日期之间的天数的方法：

private int calculateNumberOfDaysBetween(Date startDate, Date endDate) {
    if (startDate.after(endDate)) {
        throw new IllegalArgumentException("End date should be grater or equals to start date");
    }

    long startDateTime = startDate.getTime();
    long endDateTime = endDate.getTime();
    long milPerDay = 1000*60*60*24; 

    int numOfDays = (int) ((endDateTime - startDateTime) / milPerDay); // calculate vacation duration in days

    return ( numOfDays + 1); // add one day to include start date in interval
}

下面是一种计算指定时间段内的周天数的方法：

private static int calculateNumberOfWeekendsInRange(Date startDate, Date endDate) {
    Calendar calendar = Calendar.getInstance();
    calendar.setTime(startDate);

    int counter = 0;
    while(!calendar.getTime().after(endDate)) {
        int dayOfWeek = calendar.get(Calendar.DAY_OF_WEEK);
        if (dayOfWeek==1 || dayOfWeek==7) {
            counter++;
        }
        calendar.add(Calendar.DAY_OF_MONTH, 1);
    }

    return counter;
}

编辑：

我改变了最后一种方法，现在它计算不包括周末天数的天数：

private int calculateNumberOfDaysExcludeWeekends(Date startDate, Date endDate) {
    if (startDate.after(endDate)) {
        throw new IllegalArgumentException("End date should be grater or equals to start date");
    }

    Calendar calendar = Calendar.getInstance();
    calendar.setTime(startDate);

    int numOfDays = 0;
    while(!calendar.getTime().after(endDate)) {
        int dayOfWeek = calendar.get(Calendar.DAY_OF_WEEK);
        if ( (dayOfWeek>1) && (dayOfWeek<7) ) {
            numOfDays++;
        }
        calendar.add(Calendar.DAY_OF_MONTH, 1);
    }

    return numOfDays;
}
于 2012-08-03T11:22:52.230 回答
1

http://blog1.vorburger.ch/2006/06/number-of-days-between-two-dates-java.html

于 2012-08-03T11:20:21.930 回答
1

如果您想获取不包括周六和周日的天数，您可以计算两个日期之间的周数，我们称之为 num_of_weeks，这也将是两个日期之间的周末数。然后从两个日期之间的天数中减去 (num_of_weeks * 2)。

于 2012-08-03T11:29:04.230 回答
1
于 2018-03-05T00:58:25.227 回答
0 
get every day except weekend or Saturday or Sunday between two dates.

解决方案 ：

使用乔达时间

public static void main(String[] args) {
    final LocalDate start = LocalDate.now();
    final LocalDate end = new LocalDate(2012, 1, 14);

    LocalDate weekday = start;

    if (start.getDayOfWeek() == DateTimeConstants.SATURDAY ||
            start.getDayOfWeek() == DateTimeConstants.SUNDAY) {
        weekday = weekday.plusWeeks(1).withDayOfWeek(DateTimeConstants.MONDAY);
    }

    while (weekday.isBefore(end)) {
        System.out.println(weekday);

        if (weekday.getDayOfWeek() == DateTimeConstants.FRIDAY)
            weekday = weekday.plusDays(3);
        else
            weekday = weekday.plusDays(1);
    }
}
于 2012-08-03T11:26:21.857 回答