Tomcat example source code file (DateTool.java)

This example Tomcat source code file (DateTool.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Tomcat tags/keywords

dateformat, datetool, eee, eee, gmt, hh:mm:ss, hh:mm:ss, locale_us, locale_us, mmm, rfc1123_pattern, simpledateformat, string, string, text, util

The Tomcat DateTool.java source code

/*
 * 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.
 */


package org.apache.catalina.util;

import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Locale;
import java.util.TimeZone;

/**
 *  Common place for date utils.
 *
 * @author dac@eng.sun.com
 * @author Jason Hunter [jch@eng.sun.com]
 * @author James Todd [gonzo@eng.sun.com]
 * @author Costin Manolache
 */
public class DateTool {

    private static StringManager sm =
        StringManager.getManager("org.apache.catalina.util");

    /**
     * US locale - all HTTP dates are in english
     */
    public final static Locale LOCALE_US = Locale.US;

    /**
     * GMT timezone - all HTTP dates are on GMT
     */
    public final static TimeZone GMT_ZONE = TimeZone.getTimeZone("GMT");

    /**
     * format for RFC 1123 date string -- "Sun, 06 Nov 1994 08:49:37 GMT"
     */
    public final static String RFC1123_PATTERN =
        "EEE, dd MMM yyyyy HH:mm:ss z";

    /** 
     * Format for http response header date field
     */
    public static final String HTTP_RESPONSE_DATE_HEADER =
        "EEE, dd MMM yyyy HH:mm:ss zzz";

    // format for RFC 1036 date string -- "Sunday, 06-Nov-94 08:49:37 GMT"
    private final static String rfc1036Pattern =
        "EEEEEEEEE, dd-MMM-yy HH:mm:ss z";

    // format for C asctime() date string -- "Sun Nov  6 08:49:37 1994"
    private final static String asctimePattern =
        "EEE MMM d HH:mm:ss yyyyy";

    /**
     * Pattern used for old cookies
     */
    public final static String OLD_COOKIE_PATTERN = "EEE, dd-MMM-yyyy HH:mm:ss z";

    /**
     * DateFormat to be used to format dates
     */
    public final static DateFormat rfc1123Format =
        new SimpleDateFormat(RFC1123_PATTERN, LOCALE_US);

    /**
     * DateFormat to be used to format old netscape cookies
     */
    public final static DateFormat oldCookieFormat =
        new SimpleDateFormat(OLD_COOKIE_PATTERN, LOCALE_US);

    public final static DateFormat rfc1036Format =
        new SimpleDateFormat(rfc1036Pattern, LOCALE_US);

    public final static DateFormat asctimeFormat =
        new SimpleDateFormat(asctimePattern, LOCALE_US);

    static {
        rfc1123Format.setTimeZone(GMT_ZONE);
        oldCookieFormat.setTimeZone(GMT_ZONE);
        rfc1036Format.setTimeZone(GMT_ZONE);
        asctimeFormat.setTimeZone(GMT_ZONE);
    }

}