Java Parse HTTP Date parseHttpDate(String _dateStr)

Description

parse Http Date

License

Open Source License

Declaration

public static java.util.Date parseHttpDate(String _dateStr) 

Method Source Code

//package com.java2s;
/* //from www . ja  v  a  2  s  . co  m
 *  Copyright (C) 2012 AW2.0 Ltd
 *
 *  org.aw20 is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  Free Software Foundation,version 3.
 *  
 *  OpenBD is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *  
 *  You should have received a copy of the GNU General Public License
 *  along with org.aw20.  If not, see http://www.gnu.org/licenses/
 *  
 *  Additional permission under GNU GPL version 3 section 7
 *  
 *  If you modify this Program, or any covered work, by linking or combining 
 *  it with any of the JARS listed in the README.txt (or a modified version of 
 *  (that library), containing parts covered by the terms of that JAR, the 
 *  licensors of this Program grant you additional permission to convey the 
 *  resulting work. 
 *  
 *  $Id: FileUtil.java 2981 2012-08-08 21:01:27Z alan $
 */

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

public class Main {
    public static java.util.Date parseHttpDate(String _dateStr) {
        if (_dateStr == null)
            return null;

        int c1 = _dateStr.lastIndexOf(" ");

        if (c1 != -1)
            _dateStr = _dateStr.substring(0, c1).trim();

        return parseDate(_dateStr, "EEE, d MMM yyyy HH:mm:ss");
    }

    public static java.util.Date parseDate(String sDate, String _datePattern) {
        sDate = (sDate != null) ? sDate.trim() : null;

        /* if the date is null or empty, no point in going forward */
        if (sDate == null || sDate.length() == 0)
            return null;

        ParsePosition pp;
        java.util.Date d = null;
        DateFormat df = new SimpleDateFormat(_datePattern);
        df.setLenient(false);

        try {
            pp = new ParsePosition(0);
            d = df.parse(sDate, pp);
            if (pp.getIndex() != sDate.length()) {
                d = null;
            }
        } catch (Exception ex1) {
            return null;
        }
        return d;
    }
}

Related

1. parseHttpDate(String dstr)
2. parseHttpDate(String ifModifiedSince)
3. parseHttpDate(String s)
4. parseHttpDate(String string)