Java Month Get getIntervalMonths(String startDate, String endDate)

Description

get Interval Months

License

Open Source License

Declaration

public static int getIntervalMonths(String startDate, String endDate) 

Method Source Code

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

import java.text.SimpleDateFormat;

import java.util.Date;

public class Main {

    public static int getIntervalMonths(String startDate, String endDate) {
        startDate = startDate.replaceAll("-", "");
        StringBuffer sb = new StringBuffer(startDate);
        sb.insert(4, "-");
        startDate = startDate.length() == 6 ? sb.append("-01").toString() : sb.insert(7, "-").toString();
        endDate = endDate.replaceAll("-", "");
        StringBuffer sb1 = new StringBuffer(endDate);
        sb1.insert(4, "-");
        endDate = endDate.length() == 6 ? sb1.append("-01").toString() : sb1.insert(7, "-").toString();

        Date st = parseStringToUtilDate(startDate);
        Date et = parseStringToUtilDate(endDate);

        String sy = getYear(st);//from ww  w  .  j av  a 2  s .c o  m
        String ey = getYear(et);

        int MonthByYear = 0;
        int reVal = Integer.valueOf(getMonth(et)).intValue() - Integer.valueOf(getMonth(st)).intValue();

        if (!sy.equals("ey")) {
            MonthByYear = (Integer.valueOf(ey).intValue() - Integer.valueOf(sy).intValue()) * 12;
        }
        return MonthByYear + reVal;
    }

    public static java.util.Date parseStringToUtilDate(String strDate) {

        java.util.Date date = null;
        try {
            SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd");
            date = df.parse(strDate);
        } catch (Exception ex) {
            ex.printStackTrace();
        }
        return date;
    }

    public static String getYear(Date date) {
        if (null == date) {
            return null;
        }
        SimpleDateFormat yearFormat = new SimpleDateFormat("yyyy");
        return yearFormat.format(date);
    }

    public static String getMonth(Date date) {
        if (null == date) {
            return null;
        }
        SimpleDateFormat yearFormat = new SimpleDateFormat("MM");
        return yearFormat.format(date);
    }
}

Related

1. getBeforeOrAfterDate(String strDate, int months)
2. getCurMonth2Long()
3. getCurrMonthLastDay()
4. getEndDateOfMonth(String yyyymmdd)
5. getEngMonth()
6. getIntevalMonth(String strDate1, String strDate2)
7. getMonth()
8. getMonth()
9. getMonth()