java - 如何计算两个日期之间的总工作时间？

我有两个日期，2013年11月19日招聘和2014年1月10日结束招聘，都转换为总工时，不考虑周末，但他们有不同的年份，正因为如此，输出显示：总工时为-1200：

private int calculateTimeInternship(Vacancy peoplevacancy){
    int hourWorked = 0;
    Calendar date1 = Calendar.getInstance();
    Calendar date2 = Calendar.getInstance();

    date1.setTime(peoplevacancy.getDthiring());
    date2.setTime(peoplevacancy.getDtendhiring());

    int initiation = date1.get(Calendar.DAY_OF_YEAR);
    int end = date2.get(Calendar.DAY_OF_YEAR);

    int amountDay = (initiation - end) + 1;

    for (; initiation <= end; inicio++){
        if (date1.get(Calendar.DAY_OF_WEEK) == 1   || date1.get(Calendar.DAY_OF_WEEK) == 7)
        amountDay--;

        date1.add(Calendar.DATE, 1);
    }

    hourWorked = amountDay * 4 //4 hour per day;
    return hourWorked ;
}

最佳答案

Joda可以帮到你，但因为它的许可证，我永远无法使用它。
如果像我一样，乔达不适合你，你可以解决这个问题如下：

initialize endDate object
initialize startDate object
initialize weeksBetween as
    milliseconds between end&start/milliseconds per day, divided by seven (integer floor).
    //may need to normalize dates and set them to be both midnight or noon or some common time
initialize daysBetween = weeksBetween*5 // in any continuous 7 days, 5 are weekdays.
initialize curDay=startDate + weeksBetween*7 days

while(curDay is not endDate)
   add a day to curDay
   if(curDay is not weekend)
      daysBetween++
output daysBetween* 4

您可以通过将日历转换为Date来获得它们之间的毫秒数（Calendar有这样一个方法可以做到这一点）