Java Month Get getMonthRange(String strBeginDate, String strEndDate, String pattern)

Description

get Month Range

License

Open Source License

Declaration

public static List<String> getMonthRange(String strBeginDate, String strEndDate, String pattern) 

Method Source Code

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

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.List;

public class Main {
    /**/*from w  w w.  ja v  a  2 s . c o m*/
     * default date format pattern
     */
    public final static String DATE_FORMAT = "yyyy-MM-dd";

    @SuppressWarnings("deprecation")
    public static List<String> getMonthRange(int year, int month) {
        Calendar calendar = getDefaultCalendar();
        calendar.set(Calendar.YEAR, year);
        calendar.set(Calendar.MONTH, month - 1);
        calendar.set(Calendar.DAY_OF_MONTH, 1);
        List<String> result = new ArrayList<String>();
        Date date = calendar.getTime();
        while (date.getMonth() == calendar.get(Calendar.MONTH)) {
            result.add(formatDate(date));
            date = addDate(date, 1);
        }
        return result;
    }

    public static List<String> getMonthRange(String strBeginDate, String strEndDate, String pattern) {
        List<String> ret = new ArrayList<String>();
        Date beginDate = parseDate(strBeginDate);
        Date endDate = parseDate(strEndDate);

        String beginFormat = formatDate(beginDate, pattern);
        String endFormat = formatDate(endDate, pattern);
        ret.add(beginFormat);

        while (!beginFormat.equals(endFormat)) {
            beginDate = addMonth(beginDate, 1);
            beginFormat = formatDate(beginDate, pattern);
            ret.add(beginFormat);
        }
        return ret;
    }

    /**
     * get the default calendar
     *
     * @return the calendar instance
     */
    public static Calendar getDefaultCalendar() {
        Calendar calendar = Calendar.getInstance();
        calendar.setFirstDayOfWeek(Calendar.MONDAY);
        return calendar;
    }

    public static int getMonth(Date date) {
        Calendar calendar = getCalendarFromDate(date);
        return calendar.get(Calendar.MONTH) + 1;
    }

    /**
     * format date with the default pattern
     *
     * @param date the date that want to format to string
     * @return the formated date
     */
    public static String formatDate(Date date) {
        SimpleDateFormat format = new SimpleDateFormat(DATE_FORMAT);
        return format.format(date);
    }

    /**
     * format date with the given pattern
     *
     * @param date the date that want to format to string
     * @param pattern the formated pattern
     * @return the formated date
     */
    public static String formatDate(Date date, String pattern) {
        if (date == null) {
            return null;
        }
        SimpleDateFormat format = new SimpleDateFormat(pattern);
        return format.format(date);
    }

    /**
     * add day to the date
     *
     * @param date the added date
     * @param number the number to add to the date
     * @return the added date
     */
    public static Date addDate(Date date, int number) {
        Calendar calendar = getDefaultCalendar();
        calendar.setTime(date);
        calendar.add(Calendar.DATE, number);
        return calendar.getTime();
    }

    /**
     * parse date with the default pattern
     *
     * @param date string date
     * @return the parsed date
     */
    public static Date parseDate(String date) {
        SimpleDateFormat format = new SimpleDateFormat(DATE_FORMAT);
        try {
            return format.parse(date);
        } catch (ParseException e) {
            return new Date();
        }
    }

    public static Date parseDate(String date, String pattern) {
        SimpleDateFormat format = new SimpleDateFormat(pattern);
        try {
            return format.parse(date);
        } catch (ParseException e) {
            return new Date();
        }
    }

    public static Date addMonth(Date date, int number) {
        Calendar calendar = getDefaultCalendar();
        calendar.setTime(date);
        calendar.add(Calendar.MONTH, number);
        return calendar.getTime();
    }

    /**
     * get calendar from date
     *
     * @param date the passing date
     * @return the calendar instance
     */
    public static Calendar getCalendarFromDate(Date date) {
        Calendar calendar = getDefaultCalendar();
        calendar.setTime(date);
        return calendar;
    }
}

Related

1. getMonthLength(String countDate)
2. getMonthNo(Date date)
3. getMonthNumber()
4. getMonthOfSeason(Date date, boolean firstOrLast)
5. getMonthPath(Date date)
6. getMonths()
7. getMonths(DateFormatSymbols symbols)
8. getMonthSpace(Date date)
9. getMonthStartTime(int year, int month)