Java Parse Date Pattern YYYY parse(String s)

Description

Return a date object from a given string.

License

Apache License

Parameter

Parameter	Description
s	the date in string format

Return

the date

Declaration

public static Date parse(String s) 

Method Source Code

//package com.java2s;
/*//from   w ww. j av a  2 s . com
 * Copyright 2015 Adaptris Ltd.
 * 
 * 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.DateFormat;
import java.text.ParseException;
import java.text.ParsePosition;
import java.text.SimpleDateFormat;
import java.util.Date;

public class Main {
    private static final String[] DATE_FORMATS = { "yyyy-MM-dd'T'HH:mm:ssZ", "yyyyMMdd HH:mm:ss zzz",
            "yyyyMMdd HH:mm:ss", "yyyyMMdd", "yyyy-MM-dd HH:mm:ss zzz", "yyyy-MM-dd HH:mm:ss", "yyyy-MM-dd",
            "dd.MM.yyyy HH:mm:ss zzz", "dd.MM.yyyy HH:mm:ss", "dd.MM.yyyy", "dd/MM/yyyy HH:mm:ss zzz",
            "dd/MM/yyyy HH:mm:ss", "dd/MM/yyyy HH:mm:ss", "dd/MM/yyyy", };

    /**
     * Return a date object from a given string. If the date could not be parsed,
     * the current time is used.
     *
     * @param s the date in string format
     * @return the date
     */
    public static Date parse(String s) {
        if (s == null) {
            return new Date();
        }
        Date date = useDefaultFormatter(s);
        int i = 0;
        while (date == null && i < DATE_FORMATS.length) {
            date = getDate(s, DATE_FORMATS[i++]);
        }
        return date == null ? new Date() : date;
    }

    private static Date useDefaultFormatter(String s) {

        DateFormat df = DateFormat.getDateTimeInstance();
        return df.parse(s, new ParsePosition(0));
    }

    private static Date getDate(String s, String format) {
        Date d = null;

        SimpleDateFormat sdf = new SimpleDateFormat(format);
        try {
            d = sdf.parse(s);
        } catch (ParseException e) {
            d = null;
        }
        return d;
    }
}

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