Android Date String Parse parseDate(String dateValue)

Description

Parses a date value.

License

Apache License

Parameter

Parameter	Description
dateValue	the date value to parse

Exception

Parameter	Description
DateParseException	if the value could not be parsed using any of thesupported date formats

Return

the parsed date

Declaration

public static Date parseDate(String dateValue)
        throws DateParseException 

Method Source Code

/*//from ww w.  j  av a  2s.c o  m
 * ====================================================================
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 *
 */

import java.lang.ref.SoftReference;
import java.text.DateFormat;
import java.text.ParsePosition;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.HashMap;
import java.util.Locale;
import java.util.Map;
import java.util.TimeZone;
import org.apache.http2.annotation.Immutable;

public class Main{
    private static final String[] DEFAULT_PATTERNS = new String[] {
            PATTERN_RFC1123, PATTERN_RFC1036, PATTERN_ASCTIME };
    private static final Date DEFAULT_TWO_DIGIT_YEAR_START;
    /**
     * Parses a date value.  The formats used for parsing the date value are retrieved from
     * the default http params.
     *
     * @param dateValue the date value to parse
     *
     * @return the parsed date
     *
     * @throws DateParseException if the value could not be parsed using any of the
     * supported date formats
     */
    public static Date parseDate(String dateValue)
            throws DateParseException {
        return parseDate(dateValue, null, null);
    }
    /**
     * Parses the date value using the given date formats.
     *
     * @param dateValue the date value to parse
     * @param dateFormats the date formats to use
     *
     * @return the parsed date
     *
     * @throws DateParseException if none of the dataFormats could parse the dateValue
     */
    public static Date parseDate(final String dateValue,
            String[] dateFormats) throws DateParseException {
        return parseDate(dateValue, dateFormats, null);
    }
    /**
     * Parses the date value using the given date formats.
     *
     * @param dateValue the date value to parse
     * @param dateFormats the date formats to use
     * @param startDate During parsing, two digit years will be placed in the range
     * <code>startDate</code> to <code>startDate + 100 years</code>. This value may
     * be <code>null</code>. When <code>null</code> is given as a parameter, year
     * <code>2000</code> will be used.
     *
     * @return the parsed date
     *
     * @throws DateParseException if none of the dataFormats could parse the dateValue
     */
    public static Date parseDate(String dateValue, String[] dateFormats,
            Date startDate) throws DateParseException {

        if (dateValue == null) {
            throw new IllegalArgumentException("dateValue is null");
        }
        if (dateFormats == null) {
            dateFormats = DEFAULT_PATTERNS;
        }
        if (startDate == null) {
            startDate = DEFAULT_TWO_DIGIT_YEAR_START;
        }
        // trim single quotes around date if present
        // see issue #5279
        if (dateValue.length() > 1 && dateValue.startsWith("'")
                && dateValue.endsWith("'")) {
            dateValue = dateValue.substring(1, dateValue.length() - 1);
        }

        for (String dateFormat : dateFormats) {
            SimpleDateFormat dateParser = DateFormatHolder
                    .formatFor(dateFormat);
            dateParser.set2DigitYearStart(startDate);
            ParsePosition pos = new ParsePosition(0);
            Date result = dateParser.parse(dateValue, pos);
            if (pos.getIndex() != 0)
                return result;
        }

        // we were unable to parse the date
        throw new DateParseException("Unable to parse the date "
                + dateValue);
    }
}

Related

1. parseDate(String date, String format)
2. parseDate(String date, String pattern)
3. parseDate(String date, String pattern)
4. parseDate(String date, String pattern, TimeZone zone)
5. parseDate(String dateValue)
6. parseDate(String dateValue, String[] dateFormats, Date startDate)
7. parseDate(String dateValue, String[] dateFormats, Date startDate)
8. parseDate(String str)
9. parseDate(String str, String parsePattern)