Java Day of getWorkingDay(Calendar d1, Calendar d2)

Description

get Working Day

License

Open Source License

Declaration

private static int getWorkingDay(Calendar d1, Calendar d2) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.text.ParseException;
import java.text.SimpleDateFormat;

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

public class Main {
    private static int getWorkingDay(Calendar d1, Calendar d2) {
        int result = -1;
        if (d1.after(d2)) { // swap dates so that d1 is start and d2 is end
            Calendar swap = d1;//from www. j  a  v a 2s . c o  m
            d1 = d2;
            d2 = swap;
        }
        int charge_start_date = 0;
        int charge_end_date = 0;

        int stmp;
        int etmp;
        stmp = 7 - d1.get(Calendar.DAY_OF_WEEK);
        etmp = 7 - d2.get(Calendar.DAY_OF_WEEK);
        if (stmp != 0 && stmp != 6) {
            charge_start_date = stmp - 1;
        }
        if (etmp != 0 && etmp != 6) {
            charge_end_date = etmp - 1;
        }
        result = (getDaysBetween(getNextMonday(d1), getNextMonday(d2)) / 7) * 5 + charge_start_date
                - charge_end_date;
        return result;
    }

    public static int getDaysBetween(Calendar d1, Calendar d2) {
        if (d1.after(d2)) { // swap dates so that d1 is start and d2 is end
            Calendar swap = d1;
            d1 = d2;
            d2 = swap;
        }
        int days = d2.get(Calendar.DAY_OF_YEAR) - d1.get(Calendar.DAY_OF_YEAR);
        int y2 = d2.get(Calendar.YEAR);
        if (d1.get(Calendar.YEAR) != y2) {
            d1 = (Calendar) d1.clone();
            do {
                days += d1.getActualMaximum(Calendar.DAY_OF_YEAR);
                d1.add(Calendar.YEAR, 1);
            } while (d1.get(Calendar.YEAR) != y2);
        }
        return days;
    }

    public static int getDaysBetween(String beginDate, String endDate) {
        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
        Date bDate = null;
        Date eDate = null;
        try {
            bDate = format.parse(beginDate);
            eDate = format.parse(endDate);
        } catch (ParseException e) {
            return -1;
        }
        Calendar d1 = new GregorianCalendar();
        d1.setTime(bDate);
        Calendar d2 = new GregorianCalendar();
        d2.setTime(eDate);
        int days = d2.get(6) - d1.get(6);
        int y2 = d2.get(1);
        if (d1.get(1) != y2) {
            d1 = (Calendar) d1.clone();
            do {
                days += d1.getActualMaximum(6);
                d1.add(1, 1);
            } while (d1.get(1) != y2);
        }
        return days;
    }

    private static Calendar getNextMonday(Calendar date) {
        Calendar result = null;
        result = date;
        do {
            result = (Calendar) result.clone();
            result.add(Calendar.DATE, 1);
        } while (result.get(Calendar.DAY_OF_WEEK) != 2);
        return result;
    }
}

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