Java Day of getIntevalDays(String startDate, String endDate)

Description

get Inteval Days

License

Apache License

Declaration

public static long getIntevalDays(String startDate, String endDate) 

Method Source Code

//package com.java2s;
//License from project: Apache License 

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

public class Main {
    public final static String YYYY_MM_DD = "yyyy-MM-dd";

    public static long getIntevalDays(String startDate, String endDate) {
        try {/*from w w w. ja  va  2 s . co m*/
            return getIntevalDays(parse(startDate, YYYY_MM_DD), parse(endDate, YYYY_MM_DD));
        } catch (Exception ee) {
            return 0l;
        }
    }

    public static long getIntevalDays(Date startDate, Date endDate) {
        try {
            Calendar startCalendar = Calendar.getInstance();
            Calendar endCalendar = Calendar.getInstance();

            startCalendar.setTime(startDate);
            endCalendar.setTime(endDate);
            long diff = endCalendar.getTimeInMillis() - startCalendar.getTimeInMillis();

            return (diff / (1000 * 60 * 60 * 24));
        } catch (Exception ee) {
            return 0l;
        }
    }

    public static Date parse(String strDate, String pattern) throws ParseException {
        try {
            return getFormatter(pattern).parse(strDate);
        } catch (ParseException pe) {
            throw new ParseException("Method parse in Class DateUtil err: parse strDate fail.",
                    pe.getErrorOffset());
        }
    }

    private static SimpleDateFormat getFormatter(String parttern) {
        return new SimpleDateFormat(parttern);
    }
}

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