Get minutes between two working days in Java

问题

I am trying to calculate the minutes between two Joda DateTimes or Calendars in Java. Ofcourse this would be simple if I could use the Minutes.minutesBetween function, but I can only count the minutes between working days and 8:00 AM - 6:00 PM.

E.g.:

Startdate: 03-11-2015 16:00
Enddate: 03-11-2015 17:00

This would be simple, as it would be exactly 60 minutes. Because it's a workday and between the given work hours.

Now what I am trying to calculate is:

Startdate: 03-11-2015 17:00
Enddate: 03-12-2015 09:00

This should return 120 minutes even though there's a lot more minutes in between, because there's only two working hours between the two dates.

Sometimes there's also a weekend between two dates, those minutes should not be added either.

I have been trying tirelessly to implement this, but I have not found a solution.

Any ideas?

Thanks in advance.

EDIT: Thanks to Davis Broda's pseudocode I have found a solution:

private static int BEGINWORKHOUR = 8;
private static int ENDWORKHOUR = 16;

public int getWorkedMinutes(){
    Calendar start = (Calendar) this.startTime.clone();
    Calendar end = (Calendar) this.endTime.clone();

    if(start.get(Calendar.HOUR_OF_DAY) < BEGINWORKHOUR){
        start.set(Calendar.HOUR_OF_DAY, BEGINWORKHOUR);
        start.set(Calendar.MINUTE, 0);
    }

    if(end.get(Calendar.HOUR_OF_DAY) >= ENDWORKHOUR){
        end.set(Calendar.HOUR_OF_DAY, ENDWORKHOUR);
        end.set(Calendar.MINUTE, 0);
    }

    int workedMins = 0;
    while(!sameDay(start, end)){
        workedMins += workedMinsDay(start);
        start.add(Calendar.DAY_OF_MONTH, 1);
        start.set(Calendar.HOUR_OF_DAY, BEGINWORKHOUR);
        start.set(Calendar.MINUTE, 0);
    }
    workedMins += (end.get(Calendar.MINUTE) - start.get(Calendar.MINUTE)) + ((end.get(Calendar.HOUR_OF_DAY) - start.get(Calendar.HOUR_OF_DAY))*60);
    return workedMins;
}

private int workedMinsDay(Calendar start){
    if((start.get(Calendar.DAY_OF_WEEK) == 1) || (start.get(Calendar.DAY_OF_WEEK) == 6))    return 0;
    else return (60 - start.get(Calendar.MINUTE)) + ((ENDWORKHOUR - start.get(Calendar.HOUR_OF_DAY) - 1)*60);
}

private boolean sameDay(Calendar start, Calendar end){
    if(start.get(Calendar.YEAR) == end.get(Calendar.YEAR) && start.get(Calendar.MONTH) == end.get(Calendar.MONTH) &&
            start.get(Calendar.DAY_OF_MONTH) == end.get(Calendar.DAY_OF_MONTH)) return true;
    else return false;
}

回答1:

a pseudocode solution might look something like the below.

onSameWorkDay?

    if yes
        simple date comparison
    if no
        days = find number of whole work days between the two dates
        dayToMin = days * 8 * 60
        minDay1 = find minutes between specified start time and end of day1
        minDay2 = find minutes between start of final day and specified end time
        totalTime = dayToMin + minDay1 + minDay2

来源：https://stackoverflow.com/questions/28995301/get-minutes-between-two-working-days-in-java

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java

datetime

jodatime