Java Parse Date Pattern YYYY parse(String date)

Description

parse

License

Open Source License

Declaration

public static Date parse(String date) 

Method Source Code

//package com.java2s;
/**/*from ww w .  j a va 2s . c  o  m*/
 * Copyright 2013-2014 Guoqiang Chen, Shanghai, China. All rights reserved.
 *
 * Email: subchen@gmail.com
 * URL: http://subchen.github.io/
 *
 * 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.*;
import java.util.Date;

public class Main {
    private static final String[] RFC822_PATTENRS = { "EEE, dd MMM yy HH:mm:ss z", "EEE, dd MMM yy HH:mm z",
            "dd MMM yy HH:mm:ss z", "dd MMM yy HH:mm z", };
    private static final String[] W3CDATETIME_PATTERNS = { "yyyy-MM-dd'T'HH:mm:ss.SSSz",
            "yyyy-MM-dd't'HH:mm:ss.SSSz", "yyyy-MM-dd'T'HH:mm:ss.SSS'Z'", "yyyy-MM-dd't'HH:mm:ss.SSS'z'",
            "yyyy-MM-dd'T'HH:mm:ssz", "yyyy-MM-dd't'HH:mm:ssz", "yyyy-MM-dd'T'HH:mm:ss'Z'",
            "yyyy-MM-dd't'HH:mm:ss'z'", "yyyy-MM-dd'T'HH:mmz", "yyyy-MM'T'HH:mmz", "yyyy'T'HH:mmz",
            "yyyy-MM-dd't'HH:mmz", "yyyy-MM-dd'T'HH:mm'Z'", "yyyy-MM-dd't'HH:mm'z'", "yyyy-MM-dd", "yyyy-MM",
            "yyyy", };
    private static final String[] STD_PATTERNS = { "yyyy-MM-dd HH:mm:ss,SSS", "yyyy-MM-dd HH:mm:ss.SSS",
            "yyyy-MM-dd HH:mm:ss", "yyyy-MM-dd HH:mm", "yyyy-MM-dd", "yyyy/MM/dd HH:mm:ss,SSS",
            "yyyy/MM/dd HH:mm:ss.SSS", "yyyy/MM/dd HH:mm:ss", "yyyy/MM/dd HH:mm", "yyyy/MM/dd", "yyyyMMddHHmmss",
            "yyyyMMdd", "hh:mm:ss,SSS", "hh:mm:ss.SSS", "hh:mm:ss", };

    public static Date parse(String date) {
        Date d = parseUsingPatterns(date, STD_PATTERNS);
        if (d == null) {
            d = parseRFC822Date(date);
        }
        if (d == null) {
            d = parseW3CDateTime(date);
        }
        if (d == null) {
            try {
                d = DateFormat.getInstance().parse(date);
            } catch (ParseException e) {
                d = null;
            }
        }
        return d;
    }

    public static Date parseUsingPatterns(String date, String[] patterns) {
        if (date == null || date.length() == 0) {
            return null;
        }

        date = date.trim();
        for (String pattern : patterns) {
            SimpleDateFormat df = new SimpleDateFormat(pattern);
            df.setLenient(false);
            try {
                ParsePosition pp = new ParsePosition(0);
                Date d = df.parse(date, pp);
                if (d != null && pp.getIndex() == date.length()) {
                    return d;
                }
            } catch (Exception e) {
            }
        }
        return null;
    }

    public static Date parseRFC822Date(String date) {
        int ipos = date.indexOf(" UT");
        if (ipos > -1) {
            String pre = date.substring(0, ipos);
            String post = date.substring(ipos + 3);
            date = pre + " GMT" + post;
        }
        return parseUsingPatterns(date, RFC822_PATTENRS);
    }

    public static Date parseW3CDateTime(String date) {
        // if sDate has time on it, it injects 'GTM' before de TZ displacement
        // to allow the SimpleDateFormat parser to parse it properly
        int tIndex = date.indexOf("T");
        if (tIndex > -1) {
            if (date.endsWith("Z")) {
                date = date.substring(0, date.length() - 1) + "+00:00";
            }
            int tzdIndex = date.indexOf("+", tIndex);
            if (tzdIndex == -1) {
                tzdIndex = date.indexOf("-", tIndex);
            }
            if (tzdIndex > -1) {
                String pre = date.substring(0, tzdIndex);
                int secFraction = pre.indexOf(",");
                if (secFraction > -1) {
                    pre = pre.substring(0, secFraction);
                }
                String post = date.substring(tzdIndex);
                date = pre + "GMT" + post;
            }
        } else {
            date += "T00:00GMT";
        }
        return parseUsingPatterns(date, W3CDATETIME_PATTERNS);
    }
}

Related

1. parse(String date)
2. parse(String date)
3. parse(String date)
4. parse(String date)
5. parse(String date)
6. parse(String date)
7. parse(String date)
8. parse(String date)
9. parse(String date)