Java Milliseconds getTimeZoneOffSetInMillisecond(String dateString)

Description

get Time Zone Off Set In Millisecond

License

Open Source License

Declaration

public static long getTimeZoneOffSetInMillisecond(String dateString) 

Method Source Code

//package com.java2s;

public class Main {
    private final static String DATE_SEPARATOR_COLON = ":";
    private final static String DATE_SEPARATOR_MINUS = "-";
    private final static String DATE_SEPARATOR_T = "T";
    private final static String DATE_SEPARATOR_PLUS = "+";
    private final static String DATE_SEPARATOR_GMT = "GMT";

    public static long getTimeZoneOffSetInMillisecond(String dateString) {
        String timeZoneOffSetInHour = getTimeZoneOffSetInHour(dateString);
        if (timeZoneOffSetInHour.length() == 5) {
            String flag = timeZoneOffSetInHour.substring(0, 1);
            Integer hour = Integer.parseInt(timeZoneOffSetInHour.substring(1, 3));
            Integer minute = Integer.parseInt(timeZoneOffSetInHour.substring(3, 5));
            if (DATE_SEPARATOR_MINUS.equals(flag)) {
                hour = -hour;/*  w  ww .  jav a2 s  .c  om*/
                minute = -minute;
            }
            return hour * 60 * 60 * 1000 + minute * 60 * 1000;
        }
        return 0;
    }

    public static String getTimeZoneOffSetInHour(String dateString) {
        if (dateString != null
                && (dateString.contains(DATE_SEPARATOR_T) || dateString.contains(DATE_SEPARATOR_GMT))) {
            String postFixLen6 = dateString.substring(dateString.length() - 6, dateString.length());
            String postFixLen5 = dateString.substring(dateString.length() - 5, dateString.length());
            String changedPostFix = changePostFixTimeZoneFormate(postFixLen6);
            if (changedPostFix.length() == 5) {
                return changedPostFix;
            } else if ((postFixLen5.contains(DATE_SEPARATOR_PLUS) || postFixLen5.contains(DATE_SEPARATOR_MINUS))
                    && !postFixLen5.contains(DATE_SEPARATOR_COLON)) {
                return postFixLen5;
            }
        }
        return "";
    }

    private static String changePostFixTimeZoneFormate(String dateString) {
        if (isEndWithTimeZoneOffSetInHourLen6(dateString)) {
            String postFix = dateString.substring(dateString.length() - 6, dateString.length());
            postFix = postFix.replace(DATE_SEPARATOR_COLON, "");
            dateString = dateString.substring(0, dateString.length() - 6) + postFix;
        }

        return dateString;
    }

    private static boolean isEndWithTimeZoneOffSetInHourLen6(String dateString) {
        String postFix = dateString.substring(dateString.length() - 6, dateString.length());
        if (postFix.length() == 6
                && (postFix.contains(DATE_SEPARATOR_PLUS) || postFix.contains(DATE_SEPARATOR_MINUS))
                && postFix.contains(DATE_SEPARATOR_COLON)) {
            return true;
        }
        return false;
    }
}

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3. getPeriodDurationInMillis(int period)
4. GetTimeInMilliseconds(Date date)
5. getTimeStringFromMilliseconds(long millis)
6. getUnitLengthMillis(String unit)
7. hasExpiredMillis(long now, long eventTime, long timeBuffer)
8. hhmmssToMillis(String text)
9. humanDateToMillisecondsWithoutException(String date)