Java/Network Protocol/MIME

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A convenience class which handles conversions between MIME charset names and Java encoding names.

 

import java.util.*;
/**
 * MIME2Java is a convenience class which handles conversions between MIME charset names
 * and Java encoding names.
 * <p>The supported XML encodings are the intersection of XML-supported code sets and those
 * supported in JDK 1.1.
 * <p>MIME charset names are used on <var>xmlEncoding</var> parameters to methods such
 * as <code>TXDocument#setEncoding</code> and <code>DTD#setEncoding</code>.
 * <p>Java encoding names are used on <var>encoding</var> parameters to
 * methods such as <code>TXDocument#printWithFormat</code> and <code>DTD#printExternal</code>.
 * <P>
 * <TABLE BORDER="0" WIDTH="100%">
 *  <TR>
 *      <TD WIDTH="33%">
 *          <P ALIGN="CENTER"><B>Common Name</B>
 *      </TD>
 *      <TD WIDTH="15%">
 *          <P ALIGN="CENTER"><B>Use this name in XML files</B>
 *      </TD>
 *      <TD WIDTH="12%">
 *          <P ALIGN="CENTER"><B>Name Type</B>
 *      </TD>
 *      <TD WIDTH="31%">
 *          <P ALIGN="CENTER"><B>Xerces converts to this Java Encoder Name</B>
 *      </TD>
 *  </TR>
 *  <TR>
 *      <TD WIDTH="33%">8 bit Unicode</TD>
 *      <TD WIDTH="15%">
 *          <P ALIGN="CENTER">UTF-8
 *      </TD>
 *      <TD WIDTH="12%">
 *          <P ALIGN="CENTER">IANA
 *      </TD>
 *      <TD WIDTH="31%">
 *          <P ALIGN="CENTER">UTF8
 *      </TD>
 *  </TR>
 *  <TR>
 *      <TD WIDTH="33%">ISO Latin 1</TD>
 *      <TD WIDTH="15%">
 *          <P ALIGN="CENTER">ISO-8859-1
 *      </TD>
 *      <TD WIDTH="12%">
 *          <P ALIGN="CENTER">MIME
 *      </TD>
 *      <TD WIDTH="31%">
 *          <P ALIGN="CENTER">ISO-8859-1
 *      </TD>
 *  </TR>
 *  <TR>
 *      <TD WIDTH="33%">ISO Latin 2</TD>
 *      <TD WIDTH="15%">
 *          <P ALIGN="CENTER">ISO-8859-2
 *      </TD>
 *      <TD WIDTH="12%">
 *          <P ALIGN="CENTER">MIME
 *      </TD>
 *      <TD WIDTH="31%">
 *          <P ALIGN="CENTER">ISO-8859-2
 *      </TD>
 *  </TR>
 *  <TR>
 *      <TD WIDTH="33%">ISO Latin 3</TD>
 *      <TD WIDTH="15%">
 *          <P ALIGN="CENTER">ISO-8859-3
 *      </TD>
 *      <TD WIDTH="12%">
 *          <P ALIGN="CENTER">MIME
 *      </TD>
 *      <TD WIDTH="31%">
 *          <P ALIGN="CENTER">ISO-8859-3
 *      </TD>
 *  </TR>
 *  <TR>
 *      <TD WIDTH="33%">ISO Latin 4</TD>
 *      <TD WIDTH="15%">
 *          <P ALIGN="CENTER">ISO-8859-4
 *      </TD>
 *      <TD WIDTH="12%">
 *          <P ALIGN="CENTER">MIME
 *      </TD>
 *      <TD WIDTH="31%">
 *          <P ALIGN="CENTER">ISO-8859-4
 *      </TD>
 *  </TR>
 *  <TR>
 *      <TD WIDTH="33%">ISO Latin Cyrillic</TD>
 *      <TD WIDTH="15%">
 *          <P ALIGN="CENTER">ISO-8859-5
 *      </TD>
 *      <TD WIDTH="12%">
 *          <P ALIGN="CENTER">MIME
 *      </TD>
 *      <TD WIDTH="31%">
 *          <P ALIGN="CENTER">ISO-8859-5
 *      </TD>
 *  </TR>
 *  <TR>
 *      <TD WIDTH="33%">ISO Latin Arabic</TD>
 *      <TD WIDTH="15%">
 *          <P ALIGN="CENTER">ISO-8859-6
 *      </TD>
 *      <TD WIDTH="12%">
 *          <P ALIGN="CENTER">MIME
 *      </TD>
 *      <TD WIDTH="31%">
 *          <P ALIGN="CENTER">ISO-8859-6
 *      </TD>
 *  </TR>
 *  <TR>
 *      <TD WIDTH="33%">ISO Latin Greek</TD>
 *      <TD WIDTH="15%">
 *          <P ALIGN="CENTER">ISO-8859-7
 *      </TD>
 *      <TD WIDTH="12%">
 *          <P ALIGN="CENTER">MIME
 *      </TD>
 *      <TD WIDTH="31%">
 *          <P ALIGN="CENTER">ISO-8859-7
 *      </TD>
 *  </TR>
 *  <TR>
 *      <TD WIDTH="33%">ISO Latin Hebrew</TD>
 *      <TD WIDTH="15%">
 *          <P ALIGN="CENTER">ISO-8859-8
 *      </TD>
 *      <TD WIDTH="12%">
 *          <P ALIGN="CENTER">MIME
 *      </TD>
 *      <TD WIDTH="31%">
 *          <P ALIGN="CENTER">ISO-8859-8
 *      </TD>
 *  </TR>
 *  <TR>
 *      <TD WIDTH="33%">ISO Latin 5</TD>
 *      <TD WIDTH="15%">
 *          <P ALIGN="CENTER">ISO-8859-9
 *      </TD>
 *      <TD WIDTH="12%">
 *          <P ALIGN="CENTER">MIME
 *      </TD>
 *      <TD WIDTH="31%">
 *          <P ALIGN="CENTER">ISO-8859-9
 *      </TD>
 *  </TR>
 *  <TR>
 *      <TD WIDTH="33%">EBCDIC: US</TD>
 *      <TD WIDTH="15%">
 *          <P ALIGN="CENTER">ebcdic-cp-us
 *      </TD>
 *      <TD WIDTH="12%">
 *          <P ALIGN="CENTER">IANA
 *      </TD>
 *      <TD WIDTH="31%">
 *          <P ALIGN="CENTER">cp037
 *      </TD>
 *  </TR>
 *  <TR>
 *      <TD WIDTH="33%">EBCDIC: Canada</TD>
 *      <TD WIDTH="15%">
 *          <P ALIGN="CENTER">ebcdic-cp-ca
 *      </TD>
 *      <TD WIDTH="12%">
 *          <P ALIGN="CENTER">IANA
 *      </TD>
 *      <TD WIDTH="31%">
 *          <P ALIGN="CENTER">cp037
 *      </TD>
 *  </TR>
 *  <TR>
 *      <TD WIDTH="33%">EBCDIC: Netherlands</TD>
 *      <TD WIDTH="15%">
 *          <P ALIGN="CENTER">ebcdic-cp-nl
 *      </TD>
 *      <TD WIDTH="12%">
 *          <P ALIGN="CENTER">IANA
 *      </TD>
 *      <TD WIDTH="31%">
 *          <P ALIGN="CENTER">cp037
 *      </TD>
 *  </TR>
 *  <TR>
 *      <TD WIDTH="33%">EBCDIC: Denmark</TD>
 *      <TD WIDTH="15%">
 *          <P ALIGN="CENTER">ebcdic-cp-dk
 *      </TD>
 *      <TD WIDTH="12%">
 *          <P ALIGN="CENTER">IANA
 *      </TD>
 *      <TD WIDTH="31%">
 *          <P ALIGN="CENTER">cp277
 *      </TD>
 *  </TR>
 *  <TR>
 *      <TD WIDTH="33%">EBCDIC: Norway</TD>
 *      <TD WIDTH="15%">
 *          <P ALIGN="CENTER">ebcdic-cp-no
 *      </TD>
 *      <TD WIDTH="12%">
 *          <P ALIGN="CENTER">IANA
 *      </TD>
 *      <TD WIDTH="31%">
 *          <P ALIGN="CENTER">cp277
 *      </TD>
 *  </TR>
 *  <TR>
 *      <TD WIDTH="33%">EBCDIC: Finland</TD>
 *      <TD WIDTH="15%">
 *          <P ALIGN="CENTER">ebcdic-cp-fi
 *      </TD>
 *      <TD WIDTH="12%">
 *          <P ALIGN="CENTER">IANA
 *      </TD>
 *      <TD WIDTH="31%">
 *          <P ALIGN="CENTER">cp278
 *      </TD>
 *  </TR>
 *  <TR>
 *      <TD WIDTH="33%">EBCDIC: Sweden</TD>
 *      <TD WIDTH="15%">
 *          <P ALIGN="CENTER">ebcdic-cp-se
 *      </TD>
 *      <TD WIDTH="12%">
 *          <P ALIGN="CENTER">IANA
 *      </TD>
 *      <TD WIDTH="31%">
 *          <P ALIGN="CENTER">cp278
 *      </TD>
 *  </TR>
 *  <TR>
 *      <TD WIDTH="33%">EBCDIC: Italy</TD>
 *      <TD WIDTH="15%">
 *          <P ALIGN="CENTER">ebcdic-cp-it
 *      </TD>
 *      <TD WIDTH="12%">
 *          <P ALIGN="CENTER">IANA
 *      </TD>
 *      <TD WIDTH="31%">
 *          <P ALIGN="CENTER">cp280
 *      </TD>
 *  </TR>
 *  <TR>
 *      <TD WIDTH="33%">EBCDIC: Spain, Latin America</TD>
 *      <TD WIDTH="15%">
 *          <P ALIGN="CENTER">ebcdic-cp-es
 *      </TD>
 *      <TD WIDTH="12%">
 *          <P ALIGN="CENTER">IANA
 *      </TD>
 *      <TD WIDTH="31%">
 *          <P ALIGN="CENTER">cp284
 *      </TD>
 *  </TR>
 *  <TR>
 *      <TD WIDTH="33%">EBCDIC: Great Britain</TD>
 *      <TD WIDTH="15%">
 *          <P ALIGN="CENTER">ebcdic-cp-gb
 *      </TD>
 *      <TD WIDTH="12%">
 *          <P ALIGN="CENTER">IANA
 *      </TD>
 *      <TD WIDTH="31%">
 *          <P ALIGN="CENTER">cp285
 *      </TD>
 *  </TR>
 *  <TR>
 *      <TD WIDTH="33%">EBCDIC: France</TD>
 *      <TD WIDTH="15%">
 *          <P ALIGN="CENTER">ebcdic-cp-fr
 *      </TD>
 *      <TD WIDTH="12%">
 *          <P ALIGN="CENTER">IANA
 *      </TD>
 *      <TD WIDTH="31%">
 *          <P ALIGN="CENTER">cp297
 *      </TD>
 *  </TR>
 *  <TR>
 *      <TD WIDTH="33%">EBCDIC: Arabic</TD>
 *      <TD WIDTH="15%">
 *          <P ALIGN="CENTER">ebcdic-cp-ar1
 *      </TD>
 *      <TD WIDTH="12%">
 *          <P ALIGN="CENTER">IANA
 *      </TD>
 *      <TD WIDTH="31%">
 *          <P ALIGN="CENTER">cp420
 *      </TD>
 *  </TR>
 *  <TR>
 *      <TD WIDTH="33%">EBCDIC: Hebrew</TD>
 *      <TD WIDTH="15%">
 *          <P ALIGN="CENTER">ebcdic-cp-he
 *      </TD>
 *      <TD WIDTH="12%">
 *          <P ALIGN="CENTER">IANA
 *      </TD>
 *      <TD WIDTH="31%">
 *          <P ALIGN="CENTER">cp424
 *      </TD>
 *  </TR>
 *  <TR>
 *      <TD WIDTH="33%">EBCDIC: Switzerland</TD>
 *      <TD WIDTH="15%">
 *          <P ALIGN="CENTER">ebcdic-cp-ch
 *      </TD>
 *      <TD WIDTH="12%">
 *          <P ALIGN="CENTER">IANA
 *      </TD>
 *      <TD WIDTH="31%">
 *          <P ALIGN="CENTER">cp500
 *      </TD>
 *  </TR>
 *  <TR>
 *      <TD WIDTH="33%">EBCDIC: Roece</TD>
 *      <TD WIDTH="15%">
 *          <P ALIGN="CENTER">ebcdic-cp-roece
 *      </TD>
 *      <TD WIDTH="12%">
 *          <P ALIGN="CENTER">IANA
 *      </TD>
 *      <TD WIDTH="31%">
 *          <P ALIGN="CENTER">cp870
 *      </TD>
 *  </TR>
 *  <TR>
 *      <TD WIDTH="33%">EBCDIC: Yogoslavia</TD>
 *      <TD WIDTH="15%">
 *          <P ALIGN="CENTER">ebcdic-cp-yu
 *      </TD>
 *      <TD WIDTH="12%">
 *          <P ALIGN="CENTER">IANA
 *      </TD>
 *      <TD WIDTH="31%">
 *          <P ALIGN="CENTER">cp870
 *      </TD>
 *  </TR>
 *  <TR>
 *      <TD WIDTH="33%">EBCDIC: Iceland</TD>
 *      <TD WIDTH="15%">
 *          <P ALIGN="CENTER">ebcdic-cp-is
 *      </TD>
 *      <TD WIDTH="12%">
 *          <P ALIGN="CENTER">IANA
 *      </TD>
 *      <TD WIDTH="31%">
 *          <P ALIGN="CENTER">cp871
 *      </TD>
 *  </TR>
 *  <TR>
 *      <TD WIDTH="33%">EBCDIC: Urdu</TD>
 *      <TD WIDTH="15%">
 *          <P ALIGN="CENTER">ebcdic-cp-ar2
 *      </TD>
 *      <TD WIDTH="12%">
 *          <P ALIGN="CENTER">IANA
 *      </TD>
 *      <TD WIDTH="31%">
 *          <P ALIGN="CENTER">cp918
 *      </TD>
 *  </TR>
 *  <TR>
 *      <TD WIDTH="33%">Chinese for PRC, mixed 1/2 byte</TD>
 *      <TD WIDTH="15%">
 *          <P ALIGN="CENTER">gb2312
 *      </TD>
 *      <TD WIDTH="12%">
 *          <P ALIGN="CENTER">MIME
 *      </TD>
 *      <TD WIDTH="31%">
 *          <P ALIGN="CENTER">GB2312
 *      </TD>
 *  </TR>
 *  <TR>
 *      <TD WIDTH="33%">Extended Unix Code, packed for Japanese</TD>
 *      <TD WIDTH="15%">
 *          <P ALIGN="CENTER">euc-jp
 *      </TD>
 *      <TD WIDTH="12%">
 *          <P ALIGN="CENTER">MIME
 *      </TD>
 *      <TD WIDTH="31%">
 *          <P ALIGN="CENTER">eucjis
 *      </TD>
 *  </TR>
 *  <TR>
 *      <TD WIDTH="33%">Japanese: iso-2022-jp</TD>
 *      <TD WIDTH="15%">
 *          <P ALIGN="CENTER">iso-2020-jp
 *      </TD>
 *      <TD WIDTH="12%">
 *          <P ALIGN="CENTER">MIME
 *      </TD>
 *      <TD WIDTH="31%">
 *          <P ALIGN="CENTER">JIS
 *      </TD>
 *  </TR>
 *  <TR>
 *      <TD WIDTH="33%">Japanese: Shift JIS</TD>
 *      <TD WIDTH="15%">
 *          <P ALIGN="CENTER">Shift_JIS
 *      </TD>
 *      <TD WIDTH="12%">
 *          <P ALIGN="CENTER">MIME
 *      </TD>
 *      <TD WIDTH="31%">
 *          <P ALIGN="CENTER">SJIS
 *      </TD>
 *  </TR>
 *  <TR>
 *      <TD WIDTH="33%">Chinese: Big5</TD>
 *      <TD WIDTH="15%">
 *          <P ALIGN="CENTER">Big5
 *      </TD>
 *      <TD WIDTH="12%">
 *          <P ALIGN="CENTER">MIME
 *      </TD>
 *      <TD WIDTH="31%">
 *          <P ALIGN="CENTER">Big5
 *      </TD>
 *  </TR>
 *  <TR>
 *      <TD WIDTH="33%">Extended Unix Code, packed for Korean</TD>
 *      <TD WIDTH="15%">
 *          <P ALIGN="CENTER">euc-kr
 *      </TD>
 *      <TD WIDTH="12%">
 *          <P ALIGN="CENTER">MIME
 *      </TD>
 *      <TD WIDTH="31%">
 *          <P ALIGN="CENTER">iso2022kr
 *      </TD>
 *  </TR>
 *  <TR>
 *      <TD WIDTH="33%">Cyrillic</TD>
 *      <TD WIDTH="15%">
 *          <P ALIGN="CENTER">koi8-r
 *      </TD>
 *      <TD WIDTH="12%">
 *          <P ALIGN="CENTER">MIME
 *      </TD>
 *      <TD WIDTH="31%">
 *          <P ALIGN="CENTER">koi8-r
 *      </TD>
 *  </TR>
 * </TABLE>
 *
 * @version $Revision: 515 $ $Date: 2008-03-17 22:02:23 +0100 (Mon, 17 Mar 2008) $
 * @author TAMURA Kent &lt;kent@trl.ibm.co.jp&gt;
 */
public class MIME2Java {
    static private Hashtable s_enchash;
    static private Hashtable s_revhash;
    static {
        s_enchash = new Hashtable();
        //    <preferred MIME name>, <Java encoding name>
        s_enchash.put("UTF-8", "UTF8");
        s_enchash.put("US-ASCII",        "8859_1");    // ?
        s_enchash.put("ISO-8859-1",      "8859_1");
        s_enchash.put("ISO-8859-2",      "8859_2");
        s_enchash.put("ISO-8859-3",      "8859_3");
        s_enchash.put("ISO-8859-4",      "8859_4");
        s_enchash.put("ISO-8859-5",      "8859_5");
        s_enchash.put("ISO-8859-6",      "8859_6");
        s_enchash.put("ISO-8859-7",      "8859_7");
        s_enchash.put("ISO-8859-8",      "8859_8");
        s_enchash.put("ISO-8859-9",      "8859_9");
        s_enchash.put("ISO-2022-JP",     "JIS");
        s_enchash.put("SHIFT_JIS",       "SJIS");
        s_enchash.put("EUC-JP",          "EUCJIS");
        s_enchash.put("GB2312",          "GB2312");
        s_enchash.put("BIG5",            "Big5");
        s_enchash.put("EUC-KR",          "KSC5601");
        s_enchash.put("ISO-2022-KR",     "ISO2022KR");
        s_enchash.put("KOI8-R",          "KOI8_R");
        s_enchash.put("EBCDIC-CP-US",    "CP037");
        s_enchash.put("EBCDIC-CP-CA",    "CP037");
        s_enchash.put("EBCDIC-CP-NL",    "CP037");
        s_enchash.put("EBCDIC-CP-DK",    "CP277");
        s_enchash.put("EBCDIC-CP-NO",    "CP277");
        s_enchash.put("EBCDIC-CP-FI",    "CP278");
        s_enchash.put("EBCDIC-CP-SE",    "CP278");
        s_enchash.put("EBCDIC-CP-IT",    "CP280");
        s_enchash.put("EBCDIC-CP-ES",    "CP284");
        s_enchash.put("EBCDIC-CP-GB",    "CP285");
        s_enchash.put("EBCDIC-CP-FR",    "CP297");
        s_enchash.put("EBCDIC-CP-AR1",   "CP420");
        s_enchash.put("EBCDIC-CP-HE",    "CP424");
        s_enchash.put("EBCDIC-CP-CH",    "CP500");
        s_enchash.put("EBCDIC-CP-ROECE", "CP870");
        s_enchash.put("EBCDIC-CP-YU",    "CP870");
        s_enchash.put("EBCDIC-CP-IS",    "CP871");
        s_enchash.put("EBCDIC-CP-AR2",   "CP918");
                                                // j:CNS11643 -> EUC-TW?
                                                // ISO-2022-CN? ISO-2022-CN-EXT?
        s_revhash = new Hashtable();
        //    <Java encoding name>, <preferred MIME name>
        s_revhash.put("UTF8", "UTF-8");
        //s_revhash.put("8859_1", "US-ASCII");    // ?
        s_revhash.put("8859_1", "ISO-8859-1");
        s_revhash.put("8859_2", "ISO-8859-2");
        s_revhash.put("8859_3", "ISO-8859-3");
        s_revhash.put("8859_4", "ISO-8859-4");
        s_revhash.put("8859_5", "ISO-8859-5");
        s_revhash.put("8859_6", "ISO-8859-6");
        s_revhash.put("8859_7", "ISO-8859-7");
        s_revhash.put("8859_8", "ISO-8859-8");
        s_revhash.put("8859_9", "ISO-8859-9");
        s_revhash.put("JIS", "ISO-2022-JP");
        s_revhash.put("SJIS", "Shift_JIS");
        s_revhash.put("EUCJIS", "EUC-JP");
        s_revhash.put("GB2312", "GB2312");
        s_revhash.put("BIG5", "Big5");
        s_revhash.put("KSC5601", "EUC-KR");
        s_revhash.put("ISO2022KR", "ISO-2022-KR");
        s_revhash.put("KOI8_R", "KOI8-R");
        s_revhash.put("CP037", "EBCDIC-CP-US");
        s_revhash.put("CP037", "EBCDIC-CP-CA");
        s_revhash.put("CP037", "EBCDIC-CP-NL");
        s_revhash.put("CP277", "EBCDIC-CP-DK");
        s_revhash.put("CP277", "EBCDIC-CP-NO");
        s_revhash.put("CP278", "EBCDIC-CP-FI");
        s_revhash.put("CP278", "EBCDIC-CP-SE");
        s_revhash.put("CP280", "EBCDIC-CP-IT");
        s_revhash.put("CP284", "EBCDIC-CP-ES");
        s_revhash.put("CP285", "EBCDIC-CP-GB");
        s_revhash.put("CP297", "EBCDIC-CP-FR");
        s_revhash.put("CP420", "EBCDIC-CP-AR1");
        s_revhash.put("CP424", "EBCDIC-CP-HE");
        s_revhash.put("CP500", "EBCDIC-CP-CH");
        s_revhash.put("CP870", "EBCDIC-CP-ROECE");
        s_revhash.put("CP870", "EBCDIC-CP-YU");
        s_revhash.put("CP871", "EBCDIC-CP-IS");
        s_revhash.put("CP918", "EBCDIC-CP-AR2");
    }
    private MIME2Java() {
    }
    /**
     * Convert a MIME charset name, also known as an XML encoding name, to a Java encoding name.
     * @param   mimeCharsetName Case insensitive MIME charset name: <code>UTF-8, US-ASCII, ISO-8859-1,
     *                          ISO-8859-2, ISO-8859-3, ISO-8859-4, ISO-8859-5, ISO-8859-6,
     *                          ISO-8859-7, ISO-8859-8, ISO-8859-9, ISO-2022-JP, Shift_JIS,
     *                          EUC-JP, GB2312, Big5, EUC-KR, ISO-2022-KR, KOI8-R,
     *                          EBCDIC-CP-US, EBCDIC-CP-CA, EBCDIC-CP-NL, EBCDIC-CP-DK,
     *                          EBCDIC-CP-NO, EBCDIC-CP-FI, EBCDIC-CP-SE, EBCDIC-CP-IT,
     *                          EBCDIC-CP-ES, EBCDIC-CP-GB, EBCDIC-CP-FR, EBCDIC-CP-AR1,
     *                          EBCDIC-CP-HE, EBCDIC-CP-CH, EBCDIC-CP-ROECE, EBCDIC-CP-YU,
     *                          EBCDIC-CP-IS and EBCDIC-CP-AR2</code>.
     * @return                  Java encoding name, or <var>null</var> if <var>mimeCharsetName</var>
     *                          is unknown.
     * @see #reverse
     */
    public static String convert(String mimeCharsetName) {
        return (String)s_enchash.get(mimeCharsetName.toUpperCase());
    }
    /**
     * Convert a Java encoding name to MIME charset name.
     * Available values of <i>encoding</i> are "UTF8", "8859_1", "8859_2", "8859_3", "8859_4",
     * "8859_5", "8859_6", "8859_7", "8859_8", "8859_9", "JIS", "SJIS", "EUCJIS",
     * "GB2312", "BIG5", "KSC5601", "ISO2022KR",  "KOI8_R", "CP037", "CP277", "CP278",
     * "CP280", "CP284", "CP285", "CP297", "CP420", "CP424", "CP500", "CP870", "CP871" and "CP918".
     * @param   encoding    Case insensitive Java encoding name: <code>UTF8, 8859_1, 8859_2, 8859_3,
     *                      8859_4, 8859_5, 8859_6, 8859_7, 8859_8, 8859_9, JIS, SJIS, EUCJIS,
     *                      GB2312, BIG5, KSC5601, ISO2022KR, KOI8_R, CP037, CP277, CP278,
     *                      CP280, CP284, CP285, CP297, CP420, CP424, CP500, CP870, CP871
     *                      and CP918</code>.
     * @return              MIME charset name, or <var>null</var> if <var>encoding</var> is unknown.
     * @see #convert
     */
    public static String reverse(String encoding) {
        return (String)s_revhash.get(encoding.toUpperCase());
    }
}





A utility class, which provides some MIME related application logic.

 
/****************************************************************
 * 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.                                           *
 ****************************************************************/

import java.text.DateFormat;
import java.text.FieldPosition;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.HashMap;
import java.util.Locale;
import java.util.Map;
import java.util.Random;
import java.util.TimeZone;

/**
 * A utility class, which provides some MIME related application logic.
 */
public final class MimeUtil {
    
    /**
     * The <code>quoted-printable</code> encoding.
     */
    public static final String ENC_QUOTED_PRINTABLE = "quoted-printable";
    /**
     * The <code>binary</code> encoding.
     */
    public static final String ENC_BINARY = "binary";
    /**
     * The <code>base64</code> encoding.
     */
    public static final String ENC_BASE64 = "base64";
    /**
     * The <code>8bit</code> encoding.
     */
    public static final String ENC_8BIT = "8bit";
    /**
     * The <code>7bit</code> encoding.
     */
    public static final String ENC_7BIT = "7bit";
    /** <code>MIME-Version</code> header name (lowercase) */
    public static final String MIME_HEADER_MIME_VERSION = "mime-version";
    /** <code>Content-ID</code> header name (lowercase) */
    public static final String MIME_HEADER_CONTENT_ID = "content-id";
    /** <code>Content-Description</code> header name (lowercase) */
    public static final String MIME_HEADER_CONTENT_DESCRIPTION = "content-description";
    /** 
     * <code>Content-Disposition</code> header name (lowercase). 
     * See  section 2). If the string contains non-whitespace sequences
     * longer than 76 characters a line break is inserted at the whitespace
     * character following the sequence resulting in a line longer than 76
     * characters.
     * 
     * @param s
     *            string to split.
     * @param usedCharacters
     *            number of characters already used up. Usually the number of
     *            characters for header field name plus colon and one space.
     * @return a multiple-line representation of the given string.
     */
    public static String fold(String s, int usedCharacters) {
        final int maxCharacters = 76;
        final int length = s.length();
        if (usedCharacters + length <= maxCharacters)
            return s;
        StringBuilder sb = new StringBuilder();
        int lastLineBreak = -usedCharacters;
        int wspIdx = indexOfWsp(s, 0);
        while (true) {
            if (wspIdx == length) {
                sb.append(s.substring(Math.max(0, lastLineBreak)));
                return sb.toString();
            }
            int nextWspIdx = indexOfWsp(s, wspIdx + 1);
            if (nextWspIdx - lastLineBreak > maxCharacters) {
                sb.append(s.substring(Math.max(0, lastLineBreak), wspIdx));
                sb.append("\r\n");
                lastLineBreak = wspIdx;
            }
            wspIdx = nextWspIdx;
        }
    }
    /**
     * Unfold a multiple-line representation into a single line.
     * 
     * @param s
     *            string to unfold.
     * @return unfolded string.
     */
    public static String unfold(String s) {
        final int length = s.length();
        for (int idx = 0; idx < length; idx++) {
            char c = s.charAt(idx);
            if (c == "\r" || c == "\n") {
                return unfold0(s, idx);
            }
        }
        return s;
    }
    private static String unfold0(String s, int crlfIdx) {
        final int length = s.length();
        StringBuilder sb = new StringBuilder(length);
        if (crlfIdx > 0) {
            sb.append(s.substring(0, crlfIdx));
        }
        for (int idx = crlfIdx + 1; idx < length; idx++) {
            char c = s.charAt(idx);
            if (c != "\r" && c != "\n") {
                sb.append(c);
            }
        }
        return sb.toString();
    }
    private static int indexOfWsp(String s, int fromIndex) {
        final int len = s.length();
        for (int index = fromIndex; index < len; index++) {
            char c = s.charAt(index);
            if (c == " " || c == "\t")
                return index;
        }
        return len;
    }
    private static synchronized int nextCounterValue() {
        return counter++;
    }
    private static final ThreadLocal<DateFormat> RFC822_DATE_FORMAT = new ThreadLocal<DateFormat>() {
        @Override
        protected DateFormat initialValue() {
            return new Rfc822DateFormat();
        }
    };
    private static final class Rfc822DateFormat extends SimpleDateFormat {
        private static final long serialVersionUID = 1L;
        public Rfc822DateFormat() {
            super("EEE, d MMM yyyy HH:mm:ss ", Locale.US);
        }
        @Override
        public StringBuffer format(Date date, StringBuffer toAppendTo,
                FieldPosition pos) {
            StringBuffer sb = super.format(date, toAppendTo, pos);
            int zoneMillis = calendar.get(GregorianCalendar.ZONE_OFFSET);
            int dstMillis = calendar.get(GregorianCalendar.DST_OFFSET);
            int minutes = (zoneMillis + dstMillis) / 1000 / 60;
            if (minutes < 0) {
                sb.append("-");
                minutes = -minutes;
            } else {
                sb.append("+");
            }
            sb.append(String.format("%02d%02d", minutes / 60, minutes % 60));
            return sb;
        }
    }
}





Declaring MIME types to use for various requests and provide utility manipulation methods

 
/*
 * 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.
 */

/**
 *
 * <p>Utility class for declaring MIME types to use for various requests and provide
 * utility manipulation methods.</p>
 * <p>Added Content-Encoding capability, with defaults
 *
 * @author 
 * @version $Id: MimeType.java 516448 2007-03-09 16:25:47Z ate $
 */
public class MimeType
{
    
    public static final MimeType HTML  = new MimeType("text/html", "UTF-8"); //FIXME: test
    public static final MimeType XHTML = new MimeType("text/xhtml");
    public static final MimeType WML   = new MimeType("text/vnd.wap.wml");
    public static final MimeType XML   = new MimeType("text/xml");
    public static final MimeType VXML  = new MimeType("text/vxml");
    
    /**
     * Standard ContentType String, with no encoding appended.
     */
    private String mimeType = "";
    /**
     * null value means default encoding.
     * Otherwise, charset to be used.
     */
    private String charSet = null;
    
    public MimeType(String mimeType)
    {
        if (mimeType == null)
        {
            throw new NullPointerException();
        }
        this.mimeType = mimeType;
    }
    
    /**
     *
     */
    public MimeType(String mimeType, String charSet)
    {
        if (mimeType == null)
        {
            throw new NullPointerException();
        }
        this.mimeType = mimeType;
        this.charSet = charSet;
    }
    
    /** Extracts from this MimeType a user-friendly identifying code
     * ie "html" for "text/html" or "wml" for "text/vnd.wap.wml"
     *
     * @return the simplified type
     */
    public String getCode()
    {
        String type = this.mimeType;
        // get everything after "/"
        type = type.substring(type.indexOf("/") + 1);
        // remove any dot in the name
        int idx = type.lastIndexOf(".");
        if (idx >= 0)
        {
            type = type.substring(idx + 1);
        }
        //remove anything before a "-"
        idx = type.lastIndexOf("-");
        if (idx >= 0)
        {
            type = type.substring(idx + 1);
        }
        
        return type.toLowerCase();
    }
    
    /**
     * Return the media type associated
     */
    public String getContentType()
    {
        return this.mimeType;
    }
    
    /**
     * Return the character encoding associated, if any
     */
    public String getCharSet()
    {
        return this.charSet;
    }
    
    /**
     * Convert this MimeType to its external String representation
     */
    public String toString()
    {
        if (null == this.charSet)
        {
            return this.mimeType;
        }
        return this.mimeType + "; charset=" + this.charSet;
    }
    
    /**
     * Compare one MimeType to another
     */
    public boolean equals(Object obj)
    {
        if (this == obj)
        {
            return true;
        }
        
        if (obj instanceof MimeType)
        {
            MimeType comp = (MimeType) obj;
            return this.toString().equals(comp.toString());
        }
        else
        {
            return false;
        }
    }
    
}





Frequently used MIME types

 
/*
 * 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.
 */
/* $Id: MimeConstants.java 606580 2007-12-23 17:45:02Z jeremias $ */

/**
 * Frequently used MIME types for various file formats used by the XML Graphics project.
 */
public interface MimeConstants {
    /** Portable Document Format */
    String MIME_PDF             = "application/pdf";
    
    /** PostScript */
    String MIME_POSTSCRIPT      = "application/postscript";
    /** Encapsulated PostScript (same MIME type as PostScript) */
    String MIME_EPS             = MIME_POSTSCRIPT;
    
    /** HP"s PCL */
    String MIME_PCL             = "application/x-pcl";
    /** HP"s PCL (alternative MIME type) */
    String MIME_PCL_ALT         = "application/vnd.hp-PCL";
    
    /** IBM"s AFP */
    String MIME_AFP             = "application/x-afp";
    /** IBM"s AFP (alternative MIME type) */
    String MIME_AFP_ALT         = "application/vnd.ibm.modcap";
    
    /** Plain text */
    String MIME_PLAIN_TEXT      = "text/plain";
    
    /** Rich text format */
    String MIME_RTF             = "application/rtf";
    /** Rich text format (alternative 1) */
    String MIME_RTF_ALT1        = "text/richtext";
    /** Rich text format (alternative 2) */
    String MIME_RTF_ALT2        = "text/rtf";
    
    /** FrameMaker"s MIF */
    String MIME_MIF             = "application/mif";
    
    /** Structured Vector Graphics */
    String MIME_SVG             = "image/svg+xml";
    
    /** GIF images */
    String MIME_GIF             = "image/gif";
    /** PNG images */
    String MIME_PNG             = "image/png";
    /** JPEG images */
    String MIME_JPEG            = "image/jpeg";
    /** TIFF images */
    String MIME_TIFF            = "image/tiff";
       
    /** Proposed but non-registered MIME type for XSL-FO */
    String MIME_XSL_FO          = "text/xsl";
    
}





HTTP MIME Response

 
//Revised from jcommon web;

import java.io.*;
import java.net.*;
import java.util.*;

public class HTTPResponse {
  public static final HashMap<String,String> MIME_TYPES = new HashMap<String,String>();
  static {
    MIME_TYPES.put("gif", "image/gif");
    MIME_TYPES.put("jpeg", "image/jpeg");
    MIME_TYPES.put("jpg", "image/jpeg");
    MIME_TYPES.put("jpe", "image/jpeg");
    MIME_TYPES.put("bmp", "image/bmp");
    MIME_TYPES.put("png", "image/png");
    MIME_TYPES.put("tif", "image/tiff");
    MIME_TYPES.put("tiff", "image/tiff");
    MIME_TYPES.put("jnlp", "application/x-java-jnlp-file");
    MIME_TYPES.put("js", "application/x-javascript");
    MIME_TYPES.put("doc", "application/msword");
    MIME_TYPES.put("bin", "application/octet-stream");
    MIME_TYPES.put("exe", "application/octet-stream");
    MIME_TYPES.put("pdf", "application/pdf");
    MIME_TYPES.put("ai", "application/postscript");
    MIME_TYPES.put("eps", "application/postscript");
    MIME_TYPES.put("ps", "application/postscript");
    MIME_TYPES.put("rtf", "application/rtf");
    MIME_TYPES.put("class", "application/x-java-vm");
    MIME_TYPES.put("ser", "application/x-java-serialized-object");
    MIME_TYPES.put("jar", "application/x-java-archive");
    MIME_TYPES.put("sh", "application/x-sh");
    MIME_TYPES.put("tar", "application/x-tar");
    MIME_TYPES.put("zip", "application/zip");
    MIME_TYPES.put("ua", "audio/basic");
    MIME_TYPES.put("wav", "audio/x-wav");
    MIME_TYPES.put("mid", "audio/x-midi");
    MIME_TYPES.put("htm", "text/html");
    MIME_TYPES.put("html", "text/html");
    MIME_TYPES.put("css", "text/css");
    MIME_TYPES.put("txt", "text/plain");
    MIME_TYPES.put("mpeg", "video/mpeg");
    MIME_TYPES.put("mpg", "video/mpeg");
    MIME_TYPES.put("mpe", "video/mpeg");
    MIME_TYPES.put("qt", "video/quicktime");
    MIME_TYPES.put("mov", "video/quicktime");
    MIME_TYPES.put("avi", "video/avi");
    MIME_TYPES.put("movie", "video/x-sgi-movie");
  }
  
  public static String SERVER = "JavaWebServer/1.0";
  
  public static final int OK = 200;
  
  private Socket s;
  private int mode;
  private HashMap<String,String> headers;
  private HashSet<String> keys;
  
  public HTTPResponse(Socket s, int mode) throws IOException {
    this.s = s;
    this.mode = mode;
    
    headers = new HashMap<String,String>();
    keys = new HashSet<String>();
  }
  
  public void addHeader(String header, String value) {
    keys.add(header.toLowerCase());
    headers.put(header, value);
  }
  
  private void writeHeaders() throws IOException {
    if (mode == OK) {
      writeLine("HTTP/1.1 200 OK");
    }
    if (!keys.contains("server")) {
      headers.put("Server", SERVER);
    }
    if (!keys.contains("date")) {
      headers.put("Date", String.format("%EEE%, %d% %MMM% %yyyy% %HH%:%mm%:%ss% %Z%",new GregorianCalendar()));
    }
    
    Iterator<String> iterator = headers.keySet().iterator();
    String key;
    String value;
    while (iterator.hasNext()) {
      key = iterator.next();
      value = headers.get(key);
      writeLine(key + ": " + value);
    }
    
    writeLine("");
  }
  
  private void writeLine(String string) throws IOException {
    s.getOutputStream().write((string + "\r\n").getBytes());
  }
  
  public void writeFile(File f) throws IOException {
    if ((!keys.contains("content-type")) && (f.getName().indexOf(".") > -1)) {
      String ext = f.getName().substring(f.getName().lastIndexOf(".") + 1).toLowerCase();
      if (MIME_TYPES.containsKey(ext)) {
        headers.put("Content-Type", MIME_TYPES.get(ext));
      }
    }
    if (!keys.contains("content-length")) {
      headers.put("Content-Length", String.valueOf(f.length()));
    }
    writeHeaders();
    
    FileInputStream fis = new FileInputStream(f);
    byte[] b = new byte[512];
    int len;
    while ((len = fis.read(b)) > -1) {
      s.getOutputStream().write(b, 0, len);
    }
    s.getOutputStream().flush();
    s.close();
  }
}





Known mime types

 
/*
 * Copyright (c) 2003 - 2007 OpenSubsystems s.r.o. Slovak Republic. All rights reserved.
 * 
 * Project: OpenSubsystems
 * 
 * $Id: MimeTypeConstants.java,v 1.6 2007/01/07 06:14:01 bastafidli Exp $
 * 
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2 of the License. 
 * 
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
 */

import java.util.HashMap;
import java.util.Map;
/**
 * Known mime types.
 * Originally copied from HandlerContext.java taken from Jetty 3.0.4 
 * now updated from mime.properties from Jetty 5.1.10.
 * 
 * @version $Id: MimeTypeConstants.java,v 1.6 2007/01/07 06:14:01 bastafidli Exp $
 * @author Julo Legeny
 * @code.reviewer Miro Halas
 * @code.reviewed 1.4 2005/07/29 07:36:24 bastafidli
 */
public final class MimeTypeConstants 
{
   // Attributes ///////////////////////////////////////////////////////////////
   
   /**
    * Default Mime type
    */
   protected static String s_strDefaultMimeType = "text/html";
   /**
    * Hash map that will be stored types in
    */
   protected static Map s_mapMimeTypes = null;
   
   // Constructors /////////////////////////////////////////////////////////////
   
   /**
    * Static initializer;
    */
   static 
   {
      s_mapMimeTypes = new HashMap(161);
      s_mapMimeTypes.put("ai", "application/postscript");
      s_mapMimeTypes.put("aif", "audio/x-aiff");
      s_mapMimeTypes.put("aifc", "audio/x-aiff");
      s_mapMimeTypes.put("aiff", "audio/x-aiff");
      s_mapMimeTypes.put("asc", "text/plain");
      s_mapMimeTypes.put("asf", "video/x.ms.asf");
      s_mapMimeTypes.put("asx", "video/x.ms.asx");
      s_mapMimeTypes.put("au", "audio/basic");
      s_mapMimeTypes.put("avi", "video/x-msvideo");
      s_mapMimeTypes.put("bcpio", "application/x-bcpio");
      s_mapMimeTypes.put("bin", "application/octet-stream");
      s_mapMimeTypes.put("cab", "application/x-cabinet");
      s_mapMimeTypes.put("cdf", "application/x-netcdf");
      s_mapMimeTypes.put("class", "application/java-vm");
      s_mapMimeTypes.put("cpio", "application/x-cpio");
      s_mapMimeTypes.put("cpt", "application/mac-compactpro");
      s_mapMimeTypes.put("crt", "application/x-x509-ca-cert");
      s_mapMimeTypes.put("csh", "application/x-csh");
      s_mapMimeTypes.put("css", "text/css");
      s_mapMimeTypes.put("csv", "text/comma-separated-values");
      s_mapMimeTypes.put("dcr", "application/x-director");
      s_mapMimeTypes.put("dir", "application/x-director");
      s_mapMimeTypes.put("dll", "application/x-msdownload");
      s_mapMimeTypes.put("dms", "application/octet-stream");
      s_mapMimeTypes.put("doc", "application/msword");
      s_mapMimeTypes.put("dtd", "application/xml-dtd");
      s_mapMimeTypes.put("dvi", "application/x-dvi");
      s_mapMimeTypes.put("dxr", "application/x-director");
      s_mapMimeTypes.put("eps", "application/postscript");
      s_mapMimeTypes.put("etx", "text/x-setext");
      s_mapMimeTypes.put("exe", "application/octet-stream");
      s_mapMimeTypes.put("ez", "application/andrew-inset");
      s_mapMimeTypes.put("gif", "image/gif");
      s_mapMimeTypes.put("gtar", "application/x-gtar");
      s_mapMimeTypes.put("gz", "application/gzip");
      s_mapMimeTypes.put("gzip", "application/gzip");
      s_mapMimeTypes.put("hdf", "application/x-hdf");
      s_mapMimeTypes.put("htc", "text/x-component");
      s_mapMimeTypes.put("hqx", "application/mac-binhex40");
      s_mapMimeTypes.put("html", "text/html");
      s_mapMimeTypes.put("htm", "text/html");
      s_mapMimeTypes.put("ice", "x-conference/x-cooltalk");
      s_mapMimeTypes.put("ief", "image/ief");
      s_mapMimeTypes.put("iges", "model/iges");
      s_mapMimeTypes.put("igs", "model/iges");
      s_mapMimeTypes.put("jar", "application/java-archive");
      s_mapMimeTypes.put("java", "text/plain");
      s_mapMimeTypes.put("jnlp", "application/x-java-jnlp-file");
      s_mapMimeTypes.put("jpeg", "image/jpeg");
      s_mapMimeTypes.put("jpe", "image/jpeg");
      s_mapMimeTypes.put("jpg", "image/jpeg");
      s_mapMimeTypes.put("js", "application/x-javascript");
      s_mapMimeTypes.put("jsp", "text/plain");
      s_mapMimeTypes.put("kar", "audio/midi");
      s_mapMimeTypes.put("latex", "application/x-latex");
      s_mapMimeTypes.put("lha", "application/octet-stream");
      s_mapMimeTypes.put("lzh", "application/octet-stream");
      s_mapMimeTypes.put("man", "application/x-troff-man");
      s_mapMimeTypes.put("mathml", "application/mathml+xml");
      s_mapMimeTypes.put("me", "application/x-troff-me");
      s_mapMimeTypes.put("mesh", "model/mesh");
      s_mapMimeTypes.put("mid", "audio/midi");
      s_mapMimeTypes.put("midi", "audio/midi");
      s_mapMimeTypes.put("mif", "application/vnd.mif");
      s_mapMimeTypes.put("mol", "chemical/x-mdl-molfile");
      s_mapMimeTypes.put("movie", "video/x-sgi-movie");
      s_mapMimeTypes.put("mov", "video/quicktime");
      s_mapMimeTypes.put("mp2", "audio/mpeg");
      s_mapMimeTypes.put("mp3", "audio/mpeg");
      s_mapMimeTypes.put("mpeg", "video/mpeg");
      s_mapMimeTypes.put("mpe", "video/mpeg");
      s_mapMimeTypes.put("mpga", "audio/mpeg");
      s_mapMimeTypes.put("mpg", "video/mpeg");
      s_mapMimeTypes.put("ms", "application/x-troff-ms");
      s_mapMimeTypes.put("msh", "model/mesh");
      s_mapMimeTypes.put("msi", "application/octet-stream");
      s_mapMimeTypes.put("nc", "application/x-netcdf");
      s_mapMimeTypes.put("oda", "application/oda");
      s_mapMimeTypes.put("ogg", "application/ogg");
      s_mapMimeTypes.put("pbm", "image/x-portable-bitmap");
      s_mapMimeTypes.put("pdb", "chemical/x-pdb");
      s_mapMimeTypes.put("pdf", "application/pdf");
      s_mapMimeTypes.put("pgm", "image/x-portable-graymap");
      s_mapMimeTypes.put("pgn", "application/x-chess-pgn");
      s_mapMimeTypes.put("png", "image/png");
      s_mapMimeTypes.put("pnm", "image/x-portable-anymap");
      s_mapMimeTypes.put("ppm", "image/x-portable-pixmap");
      s_mapMimeTypes.put("ppt", "application/vnd.ms-powerpoint");
      s_mapMimeTypes.put("ps", "application/postscript");
      s_mapMimeTypes.put("qt", "video/quicktime");
      s_mapMimeTypes.put("ra", "audio/x-pn-realaudio");
      s_mapMimeTypes.put("ra", "audio/x-realaudio");
      s_mapMimeTypes.put("ram", "audio/x-pn-realaudio");
      s_mapMimeTypes.put("ras", "image/x-cmu-raster");
      s_mapMimeTypes.put("rdf", "application/rdf+xml");
      s_mapMimeTypes.put("rgb", "image/x-rgb");
      s_mapMimeTypes.put("rm", "audio/x-pn-realaudio");
      s_mapMimeTypes.put("roff", "application/x-troff");
      s_mapMimeTypes.put("rpm", "application/x-rpm");
      s_mapMimeTypes.put("rpm", "audio/x-pn-realaudio");
      s_mapMimeTypes.put("rtf", "application/rtf");
      s_mapMimeTypes.put("rtx", "text/richtext");
      s_mapMimeTypes.put("ser", "application/java-serialized-object");
      s_mapMimeTypes.put("sgml", "text/sgml");
      s_mapMimeTypes.put("sgm", "text/sgml");
      s_mapMimeTypes.put("sh", "application/x-sh");
      s_mapMimeTypes.put("shar", "application/x-shar");
      s_mapMimeTypes.put("silo", "model/mesh");
      s_mapMimeTypes.put("sit", "application/x-stuffit");
      s_mapMimeTypes.put("skd", "application/x-koan");
      s_mapMimeTypes.put("skm", "application/x-koan");
      s_mapMimeTypes.put("skp", "application/x-koan");
      s_mapMimeTypes.put("skt", "application/x-koan");
      s_mapMimeTypes.put("smi", "application/smil");
      s_mapMimeTypes.put("smil", "application/smil");
      s_mapMimeTypes.put("snd", "audio/basic");
      s_mapMimeTypes.put("spl", "application/x-futuresplash");
      s_mapMimeTypes.put("src", "application/x-wais-source");
      s_mapMimeTypes.put("sv4cpio", "application/x-sv4cpio");
      s_mapMimeTypes.put("sv4crc", "application/x-sv4crc");
      s_mapMimeTypes.put("svg", "image/svg+xml");
      s_mapMimeTypes.put("swf", "application/x-shockwave-flash");
      s_mapMimeTypes.put("t", "application/x-troff");
      s_mapMimeTypes.put("tar", "application/x-tar");
      s_mapMimeTypes.put("tar.gz", "application/x-gtar");
      s_mapMimeTypes.put("tcl", "application/x-tcl");
      s_mapMimeTypes.put("tex", "application/x-tex");
      s_mapMimeTypes.put("texi", "application/x-texinfo");
      s_mapMimeTypes.put("texinfo", "application/x-texinfo");
      s_mapMimeTypes.put("tgz", "application/x-gtar");
      s_mapMimeTypes.put("tiff", "image/tiff");
      s_mapMimeTypes.put("tif", "image/tiff");
      s_mapMimeTypes.put("tr", "application/x-troff");
      s_mapMimeTypes.put("tsv", "text/tab-separated-values");
      s_mapMimeTypes.put("txt", "text/plain");
      s_mapMimeTypes.put("ustar", "application/x-ustar");
      s_mapMimeTypes.put("vcd", "application/x-cdlink");
      s_mapMimeTypes.put("vrml", "model/vrml");
      s_mapMimeTypes.put("vxml", "application/voicexml+xml");
      s_mapMimeTypes.put("wav", "audio/x-wav");
      s_mapMimeTypes.put("wbmp", "image/vnd.wap.wbmp");
      s_mapMimeTypes.put("wmlc", "application/vnd.wap.wmlc");
      s_mapMimeTypes.put("wmlsc", "application/vnd.wap.wmlscriptc");
      s_mapMimeTypes.put("wmls", "text/vnd.wap.wmlscript");
      s_mapMimeTypes.put("wml", "text/vnd.wap.wml");
      s_mapMimeTypes.put("wrl", "model/vrml");
      s_mapMimeTypes.put("wtls-ca-certificate", "application/vnd.wap.wtls-ca-certificate");
      s_mapMimeTypes.put("xbm", "image/x-xbitmap");
      s_mapMimeTypes.put("xht", "application/xhtml+xml");
      s_mapMimeTypes.put("xhtml", "application/xhtml+xml");
      s_mapMimeTypes.put("xls", "application/vnd.ms-excel");
      s_mapMimeTypes.put("xml", "application/xml");
      s_mapMimeTypes.put("xpm", "image/x-xpixmap");
      s_mapMimeTypes.put("xpm", "image/x-xpixmap");
      s_mapMimeTypes.put("xsl", "application/xml");
      s_mapMimeTypes.put("xslt", "application/xslt+xml");
      s_mapMimeTypes.put("xul", "application/vnd.mozilla.xul+xml");
      s_mapMimeTypes.put("xwd", "image/x-xwindowdump");
      s_mapMimeTypes.put("xyz", "chemical/x-xyz");
      s_mapMimeTypes.put("z", "application/compress");
      s_mapMimeTypes.put("zip", "application/zip");
   }
   
   // Constructors /////////////////////////////////////////////////////////////
   
   /** 
    * Private constructor since this class cannot be instantiated
    */
   private MimeTypeConstants(
   )
   {
      // Do nothing
   }
   
   // Public methods ///////////////////////////////////////////////////////////
   
   /**
    * Method getting particular Mime type for the extension (key)
    * 
    * @param strKey - key value for returning Mime type
    * @return String
    */
   public static String getMimeType(
      String strKey
   )
   {
      String strMimeType = null;
      // get value for particular key
      strMimeType = s_mapMimeTypes.get(strKey).toString();
      if ((strMimeType == null) || (strMimeType.trim().length() == 0))
      {
         strMimeType = s_strDefaultMimeType;
      }
      
      return strMimeType;
   }
}





Map file extensions to MIME types. Based on the Apache mime.types file

 
// Copyright (c) 2003-2009, Jodd Team (jodd.org). All Rights Reserved.

import java.util.HashMap;
/**
 * Map file extensions to MIME types. Based on the Apache mime.types file.
 * http://www.iana.org/assignments/media-types/
 */
public class MimeTypes {
  public static final String MIME_APPLICATION_ANDREW_INSET  = "application/andrew-inset";
  public static final String MIME_APPLICATION_JSON      = "application/json";
  public static final String MIME_APPLICATION_ZIP       = "application/zip";
  public static final String MIME_APPLICATION_X_GZIP      = "application/x-gzip";
  public static final String MIME_APPLICATION_TGZ       = "application/tgz";
  public static final String MIME_APPLICATION_MSWORD      = "application/msword";
  public static final String MIME_APPLICATION_POSTSCRIPT    = "application/postscript";
  public static final String MIME_APPLICATION_PDF       = "application/pdf";
  public static final String MIME_APPLICATION_JNLP      = "application/jnlp";
  public static final String MIME_APPLICATION_MAC_BINHEX40  = "application/mac-binhex40";
  public static final String MIME_APPLICATION_MAC_COMPACTPRO  = "application/mac-compactpro";
  public static final String MIME_APPLICATION_MATHML_XML    = "application/mathml+xml";
  public static final String MIME_APPLICATION_OCTET_STREAM  = "application/octet-stream";
  public static final String MIME_APPLICATION_ODA       = "application/oda";
  public static final String MIME_APPLICATION_RDF_XML     = "application/rdf+xml";
  public static final String MIME_APPLICATION_JAVA_ARCHIVE  = "application/java-archive";
  public static final String MIME_APPLICATION_RDF_SMIL    = "application/smil";
  public static final String MIME_APPLICATION_SRGS      = "application/srgs";
  public static final String MIME_APPLICATION_SRGS_XML    = "application/srgs+xml";
  public static final String MIME_APPLICATION_VND_MIF     = "application/vnd.mif";
  public static final String MIME_APPLICATION_VND_MSEXCEL   = "application/vnd.ms-excel";
  public static final String MIME_APPLICATION_VND_MSPOWERPOINT= "application/vnd.ms-powerpoint";
  public static final String MIME_APPLICATION_VND_RNREALMEDIA = "application/vnd.rn-realmedia";
  public static final String MIME_APPLICATION_X_BCPIO     = "application/x-bcpio";
  public static final String MIME_APPLICATION_X_CDLINK    = "application/x-cdlink";
  public static final String MIME_APPLICATION_X_CHESS_PGN   = "application/x-chess-pgn";
  public static final String MIME_APPLICATION_X_CPIO      = "application/x-cpio";
  public static final String MIME_APPLICATION_X_CSH     = "application/x-csh";
  public static final String MIME_APPLICATION_X_DIRECTOR    = "application/x-director";
  public static final String MIME_APPLICATION_X_DVI     = "application/x-dvi";
  public static final String MIME_APPLICATION_X_FUTURESPLASH  = "application/x-futuresplash";
  public static final String MIME_APPLICATION_X_GTAR      = "application/x-gtar";
  public static final String MIME_APPLICATION_X_HDF     = "application/x-hdf";
  public static final String MIME_APPLICATION_X_JAVASCRIPT  = "application/x-javascript";
  public static final String MIME_APPLICATION_X_KOAN      = "application/x-koan";
  public static final String MIME_APPLICATION_X_LATEX     = "application/x-latex";
  public static final String MIME_APPLICATION_X_NETCDF    = "application/x-netcdf";
  public static final String MIME_APPLICATION_X_OGG     = "application/x-ogg";
  public static final String MIME_APPLICATION_X_SH      = "application/x-sh";
  public static final String MIME_APPLICATION_X_SHAR      = "application/x-shar";
  public static final String MIME_APPLICATION_X_SHOCKWAVE_FLASH = "application/x-shockwave-flash";
  public static final String MIME_APPLICATION_X_STUFFIT     = "application/x-stuffit";
  public static final String MIME_APPLICATION_X_SV4CPIO     = "application/x-sv4cpio";
  public static final String MIME_APPLICATION_X_SV4CRC    = "application/x-sv4crc";
  public static final String MIME_APPLICATION_X_TAR       = "application/x-tar";
  public static final String MIME_APPLICATION_X_RAR_COMPRESSED= "application/x-rar-compressed";
  public static final String MIME_APPLICATION_X_TCL       = "application/x-tcl";
  public static final String MIME_APPLICATION_X_TEX       = "application/x-tex";
  public static final String MIME_APPLICATION_X_TEXINFO   = "application/x-texinfo";
  public static final String MIME_APPLICATION_X_TROFF     = "application/x-troff";
  public static final String MIME_APPLICATION_X_TROFF_MAN   = "application/x-troff-man";
  public static final String MIME_APPLICATION_X_TROFF_ME    = "application/x-troff-me";
  public static final String MIME_APPLICATION_X_TROFF_MS    = "application/x-troff-ms";
  public static final String MIME_APPLICATION_X_USTAR     = "application/x-ustar";
  public static final String MIME_APPLICATION_X_WAIS_SOURCE = "application/x-wais-source";
  public static final String MIME_APPLICATION_VND_MOZZILLA_XUL_XML = "application/vnd.mozilla.xul+xml";
  public static final String MIME_APPLICATION_XHTML_XML     = "application/xhtml+xml";
  public static final String MIME_APPLICATION_XSLT_XML    = "application/xslt+xml";
  public static final String MIME_APPLICATION_XML       = "application/xml";
  public static final String MIME_APPLICATION_XML_DTD     = "application/xml-dtd";
  public static final String MIME_IMAGE_BMP         = "image/bmp";
  public static final String MIME_IMAGE_CGM         = "image/cgm";
  public static final String MIME_IMAGE_GIF         = "image/gif";
  public static final String MIME_IMAGE_IEF         = "image/ief";
  public static final String MIME_IMAGE_JPEG          = "image/jpeg";
  public static final String MIME_IMAGE_TIFF          = "image/tiff";
  public static final String MIME_IMAGE_PNG         = "image/png";
  public static final String MIME_IMAGE_SVG_XML       = "image/svg+xml";
  public static final String MIME_IMAGE_VND_DJVU        = "image/vnd.djvu";
  public static final String MIME_IMAGE_WAP_WBMP        = "image/vnd.wap.wbmp";
  public static final String MIME_IMAGE_X_CMU_RASTER      = "image/x-cmu-raster";
  public static final String MIME_IMAGE_X_ICON        = "image/x-icon";
  public static final String MIME_IMAGE_X_PORTABLE_ANYMAP   = "image/x-portable-anymap";
  public static final String MIME_IMAGE_X_PORTABLE_BITMAP   = "image/x-portable-bitmap";
  public static final String MIME_IMAGE_X_PORTABLE_GRAYMAP  = "image/x-portable-graymap";
  public static final String MIME_IMAGE_X_PORTABLE_PIXMAP   = "image/x-portable-pixmap";
  public static final String MIME_IMAGE_X_RGB         = "image/x-rgb";
  public static final String MIME_AUDIO_BASIC         = "audio/basic";
  public static final String MIME_AUDIO_MIDI          = "audio/midi";
  public static final String MIME_AUDIO_MPEG          = "audio/mpeg";
  public static final String MIME_AUDIO_X_AIFF        = "audio/x-aiff";
  public static final String MIME_AUDIO_X_MPEGURL       = "audio/x-mpegurl";
  public static final String MIME_AUDIO_X_PN_REALAUDIO    = "audio/x-pn-realaudio";
  public static final String MIME_AUDIO_X_WAV         = "audio/x-wav";
  public static final String MIME_CHEMICAL_X_PDB        = "chemical/x-pdb";
  public static final String MIME_CHEMICAL_X_XYZ        = "chemical/x-xyz";
  public static final String MIME_MODEL_IGES          = "model/iges";
  public static final String MIME_MODEL_MESH          = "model/mesh";
  public static final String MIME_MODEL_VRLM          = "model/vrml";
  public static final String MIME_TEXT_PLAIN          = "text/plain";
  public static final String MIME_TEXT_RICHTEXT       = "text/richtext";
  public static final String MIME_TEXT_RTF          = "text/rtf";
  public static final String MIME_TEXT_HTML         = "text/html";
  public static final String MIME_TEXT_CALENDAR       = "text/calendar";
  public static final String MIME_TEXT_CSS          = "text/css";
  public static final String MIME_TEXT_SGML         = "text/sgml";
  public static final String MIME_TEXT_TAB_SEPARATED_VALUES = "text/tab-separated-values";
  public static final String MIME_TEXT_VND_WAP_XML      = "text/vnd.wap.wml";
  public static final String MIME_TEXT_VND_WAP_WMLSCRIPT    = "text/vnd.wap.wmlscript";
  public static final String MIME_TEXT_X_SETEXT       = "text/x-setext";
  public static final String MIME_TEXT_X_COMPONENT      = "text/x-component";
  public static final String MIME_VIDEO_QUICKTIME       = "video/quicktime";
  public static final String MIME_VIDEO_MPEG          = "video/mpeg";
  public static final String MIME_VIDEO_VND_MPEGURL     = "video/vnd.mpegurl";
  public static final String MIME_VIDEO_X_MSVIDEO       = "video/x-msvideo";
  public static final String MIME_VIDEO_X_MS_WMV        = "video/x-ms-wmv";
  public static final String MIME_VIDEO_X_SGI_MOVIE     = "video/x-sgi-movie";
  public static final String MIME_X_CONFERENCE_X_COOLTALK   = "x-conference/x-cooltalk";
  private static HashMap<String, String> mimeTypeMapping;
  static {
    mimeTypeMapping = new HashMap<String, String>(200) {
      private void put1(String key, String value) {
        if (put(key, value) != null) {
          throw new IllegalArgumentException("Duplicated extension: " + key);
        }
      }
      {
      put1("xul", MIME_APPLICATION_VND_MOZZILLA_XUL_XML);
      put1("json", MIME_APPLICATION_JSON);
      put1("ice", MIME_X_CONFERENCE_X_COOLTALK);
      put1("movie", MIME_VIDEO_X_SGI_MOVIE);
      put1("avi", MIME_VIDEO_X_MSVIDEO);
      put1("wmv", MIME_VIDEO_X_MS_WMV);
      put1("m4u", MIME_VIDEO_VND_MPEGURL);
      put1("mxu", MIME_VIDEO_VND_MPEGURL);
      put1("htc", MIME_TEXT_X_COMPONENT);
      put1("etx", MIME_TEXT_X_SETEXT);
      put1("wmls", MIME_TEXT_VND_WAP_WMLSCRIPT);
      put1("wml", MIME_TEXT_VND_WAP_XML);
      put1("tsv", MIME_TEXT_TAB_SEPARATED_VALUES);
      put1("sgm", MIME_TEXT_SGML);
      put1("sgml", MIME_TEXT_SGML);
      put1("css", MIME_TEXT_CSS);
      put1("ifb", MIME_TEXT_CALENDAR);
      put1("ics", MIME_TEXT_CALENDAR);
      put1("wrl", MIME_MODEL_VRLM);
      put1("vrlm", MIME_MODEL_VRLM);
      put1("silo", MIME_MODEL_MESH);
      put1("mesh", MIME_MODEL_MESH);
      put1("msh", MIME_MODEL_MESH);
      put1("iges", MIME_MODEL_IGES);
      put1("igs", MIME_MODEL_IGES);
      put1("rgb", MIME_IMAGE_X_RGB);
      put1("ppm", MIME_IMAGE_X_PORTABLE_PIXMAP);
      put1("pgm", MIME_IMAGE_X_PORTABLE_GRAYMAP);
      put1("pbm", MIME_IMAGE_X_PORTABLE_BITMAP);
      put1("pnm", MIME_IMAGE_X_PORTABLE_ANYMAP);
      put1("ico", MIME_IMAGE_X_ICON);
      put1("ras", MIME_IMAGE_X_CMU_RASTER);
      put1("wbmp", MIME_IMAGE_WAP_WBMP);
      put1("djv", MIME_IMAGE_VND_DJVU);
      put1("djvu", MIME_IMAGE_VND_DJVU);
      put1("svg", MIME_IMAGE_SVG_XML);
      put1("ief", MIME_IMAGE_IEF);
      put1("cgm", MIME_IMAGE_CGM);
      put1("bmp", MIME_IMAGE_BMP);
      put1("xyz", MIME_CHEMICAL_X_XYZ);
      put1("pdb", MIME_CHEMICAL_X_PDB);
      put1("ra", MIME_AUDIO_X_PN_REALAUDIO);
      put1("ram", MIME_AUDIO_X_PN_REALAUDIO);
      put1("m3u", MIME_AUDIO_X_MPEGURL);
      put1("aifc", MIME_AUDIO_X_AIFF);
      put1("aif", MIME_AUDIO_X_AIFF);
      put1("aiff", MIME_AUDIO_X_AIFF);
      put1("mp3", MIME_AUDIO_MPEG);
      put1("mp2", MIME_AUDIO_MPEG);
      put1("mp1", MIME_AUDIO_MPEG);
      put1("mpga", MIME_AUDIO_MPEG);
      put1("kar", MIME_AUDIO_MIDI);
      put1("mid", MIME_AUDIO_MIDI);
      put1("midi", MIME_AUDIO_MIDI);
      put1("dtd", MIME_APPLICATION_XML_DTD);
      put1("xsl", MIME_APPLICATION_XML);
      put1("xml", MIME_APPLICATION_XML);
      put1("xslt", MIME_APPLICATION_XSLT_XML);
      put1("xht", MIME_APPLICATION_XHTML_XML);
      put1("xhtml", MIME_APPLICATION_XHTML_XML);
      put1("src", MIME_APPLICATION_X_WAIS_SOURCE);
      put1("ustar", MIME_APPLICATION_X_USTAR);
      put1("ms", MIME_APPLICATION_X_TROFF_MS);
      put1("me", MIME_APPLICATION_X_TROFF_ME);
      put1("man", MIME_APPLICATION_X_TROFF_MAN);
      put1("roff", MIME_APPLICATION_X_TROFF);
      put1("tr", MIME_APPLICATION_X_TROFF);
      put1("t", MIME_APPLICATION_X_TROFF);
      put1("texi", MIME_APPLICATION_X_TEXINFO);
      put1("texinfo", MIME_APPLICATION_X_TEXINFO);
      put1("tex", MIME_APPLICATION_X_TEX);
      put1("tcl", MIME_APPLICATION_X_TCL);
      put1("sv4crc", MIME_APPLICATION_X_SV4CRC);
      put1("sv4cpio", MIME_APPLICATION_X_SV4CPIO);
      put1("sit", MIME_APPLICATION_X_STUFFIT);
      put1("swf", MIME_APPLICATION_X_SHOCKWAVE_FLASH);
      put1("shar", MIME_APPLICATION_X_SHAR);
      put1("sh", MIME_APPLICATION_X_SH);
      put1("cdf", MIME_APPLICATION_X_NETCDF);
      put1("nc", MIME_APPLICATION_X_NETCDF);
      put1("latex", MIME_APPLICATION_X_LATEX);
      put1("skm", MIME_APPLICATION_X_KOAN);
      put1("skt", MIME_APPLICATION_X_KOAN);
      put1("skd", MIME_APPLICATION_X_KOAN);
      put1("skp", MIME_APPLICATION_X_KOAN);
      put1("js", MIME_APPLICATION_X_JAVASCRIPT);
      put1("hdf", MIME_APPLICATION_X_HDF);
      put1("gtar", MIME_APPLICATION_X_GTAR);
      put1("spl", MIME_APPLICATION_X_FUTURESPLASH);
      put1("dvi", MIME_APPLICATION_X_DVI);
      put1("dxr", MIME_APPLICATION_X_DIRECTOR);
      put1("dir", MIME_APPLICATION_X_DIRECTOR);
      put1("dcr", MIME_APPLICATION_X_DIRECTOR);
      put1("csh", MIME_APPLICATION_X_CSH);
      put1("cpio", MIME_APPLICATION_X_CPIO);
      put1("pgn", MIME_APPLICATION_X_CHESS_PGN);
      put1("vcd", MIME_APPLICATION_X_CDLINK);
      put1("bcpio", MIME_APPLICATION_X_BCPIO);
      put1("rm", MIME_APPLICATION_VND_RNREALMEDIA);
      put1("ppt", MIME_APPLICATION_VND_MSPOWERPOINT);
      put1("mif", MIME_APPLICATION_VND_MIF);
      put1("grxml", MIME_APPLICATION_SRGS_XML);
      put1("gram", MIME_APPLICATION_SRGS);
      put1("smil", MIME_APPLICATION_RDF_SMIL);
      put1("smi", MIME_APPLICATION_RDF_SMIL);
      put1("rdf", MIME_APPLICATION_RDF_XML);
      put1("ogg", MIME_APPLICATION_X_OGG);
      put1("oda", MIME_APPLICATION_ODA);
      put1("dmg", MIME_APPLICATION_OCTET_STREAM);
      put1("lzh", MIME_APPLICATION_OCTET_STREAM);
      put1("so", MIME_APPLICATION_OCTET_STREAM);
      put1("lha", MIME_APPLICATION_OCTET_STREAM);
      put1("dms", MIME_APPLICATION_OCTET_STREAM);
      put1("bin", MIME_APPLICATION_OCTET_STREAM);
      put1("mathml", MIME_APPLICATION_MATHML_XML);
      put1("cpt", MIME_APPLICATION_MAC_COMPACTPRO);
      put1("hqx", MIME_APPLICATION_MAC_BINHEX40);
      put1("jnlp", MIME_APPLICATION_JNLP);
      put1("ez", MIME_APPLICATION_ANDREW_INSET);
      put1("txt", MIME_TEXT_PLAIN);
      put1("ini", MIME_TEXT_PLAIN);
      put1("c", MIME_TEXT_PLAIN);
      put1("h", MIME_TEXT_PLAIN);
      put1("cpp", MIME_TEXT_PLAIN);
      put1("cxx", MIME_TEXT_PLAIN);
      put1("cc", MIME_TEXT_PLAIN);
      put1("chh", MIME_TEXT_PLAIN);
      put1("java", MIME_TEXT_PLAIN);
      put1("csv", MIME_TEXT_PLAIN);
      put1("bat", MIME_TEXT_PLAIN);
      put1("cmd", MIME_TEXT_PLAIN);
      put1("asc", MIME_TEXT_PLAIN);
      put1("rtf", MIME_TEXT_RTF);
      put1("rtx", MIME_TEXT_RICHTEXT);
      put1("html", MIME_TEXT_HTML);
      put1("htm", MIME_TEXT_HTML);
      put1("zip", MIME_APPLICATION_ZIP);
      put1("rar", MIME_APPLICATION_X_RAR_COMPRESSED);
      put1("gzip", MIME_APPLICATION_X_GZIP);
      put1("gz", MIME_APPLICATION_X_GZIP);
      put1("tgz", MIME_APPLICATION_TGZ);
      put1("tar", MIME_APPLICATION_X_TAR);
      put1("gif", MIME_IMAGE_GIF);
      put1("jpeg", MIME_IMAGE_JPEG);
      put1("jpg", MIME_IMAGE_JPEG);
      put1("jpe", MIME_IMAGE_JPEG);
      put1("tiff", MIME_IMAGE_TIFF);
      put1("tif", MIME_IMAGE_TIFF);
      put1("png", MIME_IMAGE_PNG);
      put1("au", MIME_AUDIO_BASIC);
      put1("snd", MIME_AUDIO_BASIC);
      put1("wav", MIME_AUDIO_X_WAV);
      put1("mov", MIME_VIDEO_QUICKTIME);
      put1("qt", MIME_VIDEO_QUICKTIME);
      put1("mpeg", MIME_VIDEO_MPEG);
      put1("mpg", MIME_VIDEO_MPEG);
      put1("mpe", MIME_VIDEO_MPEG);
      put1("abs", MIME_VIDEO_MPEG);
      put1("doc", MIME_APPLICATION_MSWORD);
      put1("xls", MIME_APPLICATION_VND_MSEXCEL);
      put1("eps", MIME_APPLICATION_POSTSCRIPT);
      put1("ai", MIME_APPLICATION_POSTSCRIPT);
      put1("ps", MIME_APPLICATION_POSTSCRIPT);
      put1("pdf", MIME_APPLICATION_PDF);
      put1("exe", MIME_APPLICATION_OCTET_STREAM);
      put1("dll", MIME_APPLICATION_OCTET_STREAM);
      put1("class", MIME_APPLICATION_OCTET_STREAM);
      put1("jar", MIME_APPLICATION_JAVA_ARCHIVE);
    }};
  }
  public static void main(String[] args) {
    System.out.println(mimeTypeMapping.size());
  }
  /**
   * Registers MIME type for provided extension. Existing extension type will be overriden.
   */
  public static void registerMimeType(String ext, String mimeType) {
    mimeTypeMapping.put(ext, mimeType);
  }
  /**
   * Returns the corresponding MIME type to the given extension.
   * If no MIME type was found it returns "application/octet-stream" type.
   */
  public static String getMimeType(String ext) {
    String mimeType = lookupMimeType(ext);
    if (mimeType == null) {
      mimeType = MIME_APPLICATION_OCTET_STREAM;
    }
    return mimeType;
  }
  /**
   * Simply returns MIME type or <code>null</code> if no type is found.
   */
  public static String lookupMimeType(String ext) {
    return mimeTypeMapping.get(ext.toLowerCase());
  }
}





MIME type mappings

 

text/plain  txt text
text/html   html htm
text/xml    xml
text/css    css
text/rtf    rtf
application/rtf rtf
text/vnd.wap.wml    wml
image/jpeg  jpeg jpg jpe
image/png   png
image/gif   gif
image/tiff  tiff tif
image/svg+xml   svg svgz
image/svg-xml   svg
application/pdf pdf
model/vrml  wrl
application/smil    smil
text/javascript js
application/x-javascript    js
text/vbscript   vbs
application/zip zip
video/mpeg  mpeg mpg mpe
video/quicktime mov
audio/midi  mid
audio/mpeg  mp3
text/x-vcard    vcf
text/rdf    rdf
application/octet-stream





MIME types to use for various requests

 
/*
 * 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.
 */


/**
 *
 * <p>Utility class for declaring MIME types to use for various requests and provide
 * utility manipulation methods.</p>
 * <p>Added Content-Encoding capability, with defaults
 *
 * @author 
 * @version $Id: MimeType.java 516448 2007-03-09 16:25:47Z ate $
 */
public class MimeType
{
    
    public static final MimeType HTML  = new MimeType("text/html", "UTF-8"); //FIXME: test
    public static final MimeType XHTML = new MimeType("text/xhtml");
    public static final MimeType WML   = new MimeType("text/vnd.wap.wml");
    public static final MimeType XML   = new MimeType("text/xml");
    public static final MimeType VXML  = new MimeType("text/vxml");
    
    /**
     * Standard ContentType String, with no encoding appended.
     */
    private String mimeType = "";
    /**
     * null value means default encoding.
     * Otherwise, charset to be used.
     */
    private String charSet = null;
    
    public MimeType(String mimeType)
    {
        if (mimeType == null)
        {
            throw new NullPointerException();
        }
        this.mimeType = mimeType;
    }
    
    /**
     *
     */
    public MimeType(String mimeType, String charSet)
    {
        if (mimeType == null)
        {
            throw new NullPointerException();
        }
        this.mimeType = mimeType;
        this.charSet = charSet;
    }
    
    /** Extracts from this MimeType a user-friendly identifying code
     * ie "html" for "text/html" or "wml" for "text/vnd.wap.wml"
     *
     * @return the simplified type
     */
    public String getCode()
    {
        String type = this.mimeType;
        // get everything after "/"
        type = type.substring(type.indexOf("/") + 1);
        // remove any dot in the name
        int idx = type.lastIndexOf(".");
        if (idx >= 0)
        {
            type = type.substring(idx + 1);
        }
        //remove anything before a "-"
        idx = type.lastIndexOf("-");
        if (idx >= 0)
        {
            type = type.substring(idx + 1);
        }
        
        return type.toLowerCase();
    }
    
    /**
     * Return the media type associated
     */
    public String getContentType()
    {
        return this.mimeType;
    }
    
    /**
     * Return the character encoding associated, if any
     */
    public String getCharSet()
    {
        return this.charSet;
    }
    
    /**
     * Convert this MimeType to its external String representation
     */
    public String toString()
    {
        if (null == this.charSet)
        {
            return this.mimeType;
        }
        return this.mimeType + "; charset=" + this.charSet;
    }
    
    /**
     * Compare one MimeType to another
     */
    public boolean equals(Object obj)
    {
        if (this == obj)
        {
            return true;
        }
        
        if (obj instanceof MimeType)
        {
            MimeType comp = (MimeType) obj;
            return this.toString().equals(comp.toString());
        }
        else
        {
            return false;
        }
    }
    
}





Print MIME header

 
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
public class MainClass {
  public static void main(String args[]) {
    URL u;
    URLConnection uc;
    String header;
    try {
      u = new URL("http://www.jexp.ru");
      uc = u.openConnection();
      for (int j = 1;; j++) {
        header = uc.getHeaderField(j);
        if (header == null)
          break;
        System.out.println(uc.getHeaderFieldKey(j) + " " + header);
      }
    } catch (MalformedURLException e) {
      System.err.println("not a URL I understand.");
    } catch (IOException e) {
      System.err.println(e);
    }
  }
}