Java Date Format Guess getDateFormat(String date)

Description

Get the date pattern

License

Open Source License

Parameter

Parameter	Description
date	the date to get the format

Return

String the pattern

Declaration

public static String getDateFormat(String date) 

Method Source Code

//package com.java2s;
/*//from  w  w w .j a va2  s.  c o  m
 * Funambol is a mobile platform developed by Funambol, Inc.
 * Copyright (C) 2005 - 2007 Funambol, Inc.
 *
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Affero General Public License version 3 as published by
 * the Free Software Foundation with the addition of the following permission
 * added to Section 15 as permitted in Section 7(a): FOR ANY PART OF THE COVERED
 * WORK IN WHICH THE COPYRIGHT IS OWNED BY FUNAMBOL, FUNAMBOL DISCLAIMS THE
 * WARRANTY OF NON INFRINGEMENT  OF THIRD PARTY RIGHTS.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program; if not, see http://www.gnu.org/licenses or write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 * MA 02110-1301 USA.
 *
 * You can contact Funambol, Inc. headquarters at 643 Bair Island Road, Suite
 * 305, Redwood City, CA 94063, USA, or at email address info@funambol.com.
 *
 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU Affero General Public License version 3.
 *
 * In accordance with Section 7(b) of the GNU Affero General Public License
 * version 3, these Appropriate Legal Notices must retain the display of the
 * "Powered by Funambol" logo. If the display of the logo is not reasonably
 * feasible for technical reasons, the Appropriate Legal Notices must display
 * the words "Powered by Funambol".
 */

import java.text.ParseException;
import java.text.SimpleDateFormat;

import java.util.Date;

public class Main {
    public final static String PATTERN_YYYYMMDD = "yyyyMMdd";
    public final static int PATTERN_YYYYMMDD_LENGTH = 8;
    public final static String PATTERN_YYYY_MM_DD = "yyyy-MM-dd";
    public final static int PATTERN_YYYY_MM_DD_LENGTH = 10;
    public final static String PATTERN_UTC = "yyyyMMdd'T'HHmmss'Z'";
    public final static int PATTERN_UTC_LENGTH = 16;
    public final static String PATTERN_UTC_WOZ = "yyyyMMdd'T'HHmmss";
    public final static int PATTERN_UTC_WOZ_LENGTH = 15;
    public final static String PATTERN_UTC_WSEP = "yyyy-MM-dd'T'HH:mm:ss'Z'";
    public final static int PATTERN_UTC_WSEP_LENGTH = 20;
    public final static String PATTERN_LOCALTIME = "dd/MM/yyyy HH:mm:ss";
    public final static int PATTERN_LOCALTIME_LENGTH = 19;
    public final static String PATTERN_LOCALTIME_WOT = "dd/MM/yyyy";
    public final static int PATTERN_LOCALTIME_WOT_LENGTH = 10;
    public final static String PATTERN_YYYY_MM_DD_HH_MM_SS = "yyyy-MM-dd HH:mm:ss";
    public final static int PATTERN_YYYY_MM_DD_HH_MM_SS_LENGTH = 19;

    /**
     * Get the date pattern
     *
     * @param date the date to get the format
     * @return String the pattern
     */
    public static String getDateFormat(String date) {

        if (date == null || date.equals("")) {
            return null;
        }

        SimpleDateFormat dateFormat = new SimpleDateFormat();
        String[] patterns = new String[] { PATTERN_UTC, PATTERN_UTC_WOZ, PATTERN_UTC_WSEP, PATTERN_YYYY_MM_DD,
                PATTERN_YYYYMMDD, PATTERN_LOCALTIME, PATTERN_LOCALTIME_WOT, PATTERN_YYYY_MM_DD_HH_MM_SS };

        int[] patternsLength = new int[] { PATTERN_UTC_LENGTH, PATTERN_UTC_WOZ_LENGTH, PATTERN_UTC_WSEP_LENGTH,
                PATTERN_YYYY_MM_DD_LENGTH, PATTERN_YYYYMMDD_LENGTH, PATTERN_LOCALTIME_LENGTH,
                PATTERN_LOCALTIME_WOT_LENGTH, PATTERN_YYYY_MM_DD_HH_MM_SS_LENGTH };

        int s = patterns.length; // and also patternsLength.length
        Date d = null;
        for (int i = 0; i < s; i++) {
            try {
                dateFormat.applyPattern(patterns[i]);
                dateFormat.setLenient(true);
                d = dateFormat.parse(date);

                if (date.length() == patternsLength[i]) {
                    return patterns[i];
                }

            } catch (ParseException e) {
                continue;
            }
        }
        return null;
    }
}

Related

1. determineDateFormat(String dateString)
2. determineDateFormat(String dateString)
3. determineDateFormat(String dateString)
4. getDateFormat(Date date)
5. getDateFormat(Date date, String format)
6. getDateFormat(String date)
7. getDateFormat(String date)
8. getDateFormat(String dateStr)
9. getDateFormatted(Date date)