DateUtils.java

package storm.applications.util.data;

import java.util.Calendar;
import java.util.Date;

public class DateUtils {
    public static long getMinuteForTime(Date time) {
        Calendar c = Calendar.getInstance();
        c.setTime(time);
        c.set(Calendar.SECOND,0);
        c.set(Calendar.MILLISECOND, 0);
        return c.getTimeInMillis();
    }
    
    public static int getWorkingDaysBetweenTwoDates(Date startDate, Date endDate) {
        Calendar startCal;
        Calendar endCal;
        startCal = Calendar.getInstance();
        startCal.setTime(startDate);
        endCal = Calendar.getInstance();
        endCal.setTime(endDate);
        int workDays = 0;

        //Return 0 if start and end are the same
        if (startCal.getTimeInMillis() == endCal.getTimeInMillis()) {
            return 0;
        }

        if (startCal.getTimeInMillis() > endCal.getTimeInMillis()) {
            startCal.setTime(endDate);
            endCal.setTime(startDate);
        }

        do {
            startCal.add(Calendar.DAY_OF_MONTH, 1);
            if (startCal.get(Calendar.DAY_OF_WEEK) != Calendar.SATURDAY && startCal.get(Calendar.DAY_OF_WEEK) != Calendar.SUNDAY) {
                ++workDays;
            }
        } while (startCal.getTimeInMillis() < endCal.getTimeInMillis());

        return workDays;
    }
}