Java Parse Date parseDateTime(String s)

Description

Parses the date/time stamp from a given input parameter using one of the following formats

• mm/dd/yyyy
• mm/dd/yyyy hh:mm:ss
• EEE MMM dd HH:mm:ss zzz yyyy - this is the standard output from the unix date command
• EEE mm/dd/yyyy HH:mm:ss.ms - this is the standard output from the windows command echo %date% %time%
• yyyy-MM-ddThh:mm:ss.zzzzzzz
• Epoch time (ms)
• PnYnMnDTnHnMnS - XML lexical representation

License

Mozilla Public License

Parameter

Parameter	Description
s	the input string

Exception

Parameter	Description
Exception	if the date cannot be parsed

Return

a non-null instance of Calendar matching the interpreted date.

Declaration

public static Calendar parseDateTime(String s) throws Exception 

Method Source Code

//package com.java2s;
/**/*from  www.  j  a va2 s . c  om*/
 * This Source Code Form is subject to the terms of the Mozilla Public License,
 * v. 2.0. If a copy of the MPL was not distributed with this file, You can
 * obtain one at http://mozilla.org/MPL/2.0/.
 *
 * If it is not possible or desirable to put the notice in a particular file,
 * then You may include the notice in a location (such as a LICENSE file in a
 * relevant directory) where a recipient would be likely to look for such a
 * notice.
 *
 * 
 */

import java.text.ParsePosition;
import java.text.SimpleDateFormat;

import java.util.Date;
import java.util.GregorianCalendar;

import java.util.Calendar;

public class Main {
    /**
     * Parses the date/time stamp from a given input parameter using one of the
     * following formats<br> <ul> <li>mm/dd/yyyy</li> <li>mm/dd/yyyy
     * hh:mm:ss</li> <li>EEE MMM dd HH:mm:ss zzz yyyy - this is the standard
     * output from the unix date command</li> <li>EEE mm/dd/yyyy HH:mm:ss.ms -
     * this is the standard output from the windows command echo %date%
     * %time%</li> <li>yyyy-MM-ddThh:mm:ss.zzzzzzz</li> <li>Epoch time (ms)</li>
     * <li>PnYnMnDTnHnMnS - XML lexical representation</li> </ul>
     *
     * @param s the input string
     * @return a non-null instance of Calendar matching the interpreted date.
     * @throws Exception if the date cannot be parsed
     */
    public static Calendar parseDateTime(String s) throws Exception {
        //this is what the calendar widget gives us
        SimpleDateFormat f1 = new SimpleDateFormat("MM/dd/yyyy");
        SimpleDateFormat f2 = new SimpleDateFormat("MM/dd/yyyy HH:mm:ss");
        //std unix date format
        SimpleDateFormat f3 = new SimpleDateFormat(
                "EEE MMM dd HH:mm:ss zzz yyyy");
        //std windows  date format
        SimpleDateFormat f4 = new SimpleDateFormat(
                "EEE MM/dd/yyyy HH:mm:ss.ms");
        SimpleDateFormat f5 = new SimpleDateFormat(
                "yyyy-MM-dd HH:mm:ss.zzzzzzz");
        Date d = null;

        try {
            d = f1.parse(s, new ParsePosition(0));
        } catch (Exception ex) {
        }
        if (d == null) {
            try {
                d = f2.parse(s, new ParsePosition(0));
            } catch (Exception ex) {
            }
        }
        if (d == null) {
            try {
                d = f3.parse(s, new ParsePosition(0));
            } catch (Exception ex) {
            }
        }
        if (d == null) {
            try {
                d = f4.parse(s, new ParsePosition(0));
            } catch (Exception ex) {
            }
        }
        if (d == null) {
            try {
                d = f5.parse(s, new ParsePosition(0));
            } catch (Exception ex) {
            }
        }
        if (d != null) {
            GregorianCalendar gcal = new GregorianCalendar();
            gcal.setTime(d);
            return (gcal);
        }
        try {
            long timestamp = Long.parseLong(s);
            GregorianCalendar gcal = new GregorianCalendar();
            gcal.setTimeInMillis(timestamp);
            return (gcal);
        } catch (Exception x) {
        }
        throw new Exception(
                "Unable to parse the date, see documentation for correct usage");
    }
}

Related

1. parseDateTime(String dateTimeString, String[] validFormats, String outputFormat)
2. parseDateTime(String format, String dateStr)
3. parseDateTime(String fullDateParam, String unixDateParam, Map request)
4. parseDateTime(String s)
5. parseDateTime(String s)
6. parseDateTime(String s)
7. parseDatetime(String value)
8. parseDateTimeFromString(String datetime)
9. parseDateTimeHuman(String dateString)