Java Parse Date Pattern YYYY parse(String text)

Description

Parses a ISO8601-compliant date/time string.

License

Apache License

Parameter

Parameter	Description
text	the date/time string to be parsed

Return

a Calendar, or null if the input could not be parsed

Declaration

public static Calendar parse(String text) 

Method Source Code

//package com.java2s;
/**/*from   w  w  w  . j av a 2 s . co  m*/
 * Copyright 2015 Marco Scavuzzo
 * Contact: Marco Scavuzzo <marco.scavuzzo@polimi.it>
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import java.text.ParsePosition;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.TimeZone;

public class Main {
    /**
     * specific ISO8601-compliant format string (without time zone information)
     */
    private static String ISO_FORMAT = "yyyy-MM-dd'T'HH:mm:ss.SSS";

    /**
     * Parses a ISO8601-compliant date/time string.
     * @param text the date/time string to be parsed
     * @return a <code>Calendar</code>, or <code>null</code>
     * if the input could not be parsed
     */
    public static Calendar parse(String text) {
        // parse time zone designator (Z or +00:00 or -00:00)
        // and build time zone id (GMT or GMT+00:00 or GMT-00:00)
        String tzID = "GMT"; // Zulu, i.e. UTC/GMT (default)
        int tzPos = text.indexOf('Z');
        if (tzPos == -1) {
            // not Zulu, try +
            tzPos = text.indexOf('+');
            if (tzPos == -1) {
                // not +, try -, but remember it might be used within first
                // 8 charaters for separating year, month and day, yyyy-mm-dd
                tzPos = text.indexOf('-', 8);
            }
            if (tzPos == -1) {
                // no time zone specified, assume Zulu
            } else {
                // offset to UTC specified in the format +00:00/-00:00
                tzID += text.substring(tzPos);
                text = text.substring(0, tzPos);
            }
        } else {
            // Zulu, i.e. UTC/GMT
            text = text.substring(0, tzPos);
        }

        TimeZone tz = TimeZone.getTimeZone(tzID);
        SimpleDateFormat format = new SimpleDateFormat(ISO_FORMAT);
        format.setLenient(false);
        format.setTimeZone(tz);
        Date date = format.parse(text, new ParsePosition(0));
        if (date == null) {
            return null;
        }
        Calendar cal = Calendar.getInstance(tz);
        cal.setTime(date);
        return cal;
    }
}

Related

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2. parse(String strDate)
3. parse(String string)
4. parse(String string)
5. parse(String stringData)
6. parse(String text)
7. parse(String time)
8. parse(String time, String df)
9. parse1(String DateString, String dateTimeSeparator)