Java Month Get getWeekOfMonth(String datetime)

Description

get Week Of Month

License

Open Source License

Declaration

public static int getWeekOfMonth(String datetime) 

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;

public class Main {
    private static final SimpleDateFormat FORMAT = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    private static final SimpleDateFormat DATE_FORMAT = new SimpleDateFormat("yyyy-MM-dd");

    public static int getWeekOfMonth(String datetime) {
        String start = datetime.substring(0, 8) + "01";
        Date day = parseDate(datetime);

        int i = 7;
        int w = 1;

        while (true) {
            if (day.getTime() < addDay(start, i).getTime()) {
                return w;
            }//from w ww  . j  ava  2s.com
            i = i + 7;
            w++;
        }
    }

    public static Date parseDate(String datetime) {
        try {
            return DATE_FORMAT.parse(datetime);
        } catch (ParseException e) {
            return new Date();
        }
    }

    public static Date addDay(String datetime, int day) {
        Calendar cal = Calendar.getInstance();
        cal.setTime(parseDate(datetime));
        cal.add(Calendar.DAY_OF_YEAR, day);
        return cal.getTime();
    }

    public static Date parse(String datetime) {
        try {
            return FORMAT.parse(datetime);
        } catch (ParseException e) {
            return new Date();
        }
    }
}

Related

1. getThisMonth()
2. getThisMonthAndCycle()
3. getThisMonthDate()
4. getThisMonthLastDate()
5. getTsOfMonth(Date date, boolean isEnd, boolean isPrevious)
6. getWorkMonthLastDay(Date date)
7. getYesterdayOnLastMonth(String yesterday)
8. getYestMonth()