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   <title>webdefault.xml</title><link rel="stylesheet" type="text/css" href="css/docbook.css"><meta name="generator" content="DocBook XSL Stylesheets V1.79.1"><meta name="keywords" content="jetty, servlet, servlet-api, cometd, http, websocket, eclipse, maven, java, server, software"><link rel="home" href="index.html" title="Jetty"><link rel="up" href="reference-section.html" title="Chapter&nbsp;32.&nbsp;Jetty XML Reference"><link rel="prev" href="jetty-env-xml.html" title="jetty-env.xml"><link rel="next" href="override-web-xml.html" title="Jetty override-web.xml"><link xmlns:jfetch="java:org.eclipse.jetty.xslt.tools.JavaSourceFetchExtension" xmlns:fetch="java:org.eclipse.jetty.xslt.tools.SourceFetchExtension" xmlns:d="http://docbook.org/ns/docbook" xmlns:l="http://docbook.sourceforge.net/xmlns/l10n/1.0" xmlns:xslthl="http://xslthl.sf.net" xmlns:gcse="http://www.google.com" xmlns:date="http://exslt.org/dates-and-times" rel="shortcut icon" href="images/favicon.ico"><link rel="stylesheet" href="css/highlighter/foundation.css"><script src="js/highlight.pack.js"></script><script>
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            Version: 9.3.28.v20191105</span></td><td style="width: 50%"></td></tr></table><div xmlns:jfetch="java:org.eclipse.jetty.xslt.tools.JavaSourceFetchExtension" xmlns:fetch="java:org.eclipse.jetty.xslt.tools.SourceFetchExtension" xmlns:d="http://docbook.org/ns/docbook" xmlns:l="http://docbook.sourceforge.net/xmlns/l10n/1.0" xmlns:xslthl="http://xslthl.sf.net" xmlns:gcse="http://www.google.com" xmlns:date="http://exslt.org/dates-and-times" class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><code class="literal">webdefault.xml</code></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="jetty-env-xml.html"><i class="fa fa-chevron-left" aria-hidden="true"></i> Previous</a>&nbsp;</td><th width="60%" align="center">Chapter&nbsp;32.&nbsp;Jetty XML Reference<br><a accesskey="p" href="index.html"><i class="fa fa-home" aria-hidden="true"></i> Home</a></th><td width="20%" align="right">&nbsp;<a accesskey="n" href="override-web-xml.html">Next <i class="fa fa-chevron-right" aria-hidden="true"></i></a></td></tr></table><hr></div><div xmlns:jfetch="java:org.eclipse.jetty.xslt.tools.JavaSourceFetchExtension" xmlns:fetch="java:org.eclipse.jetty.xslt.tools.SourceFetchExtension" xmlns:d="http://docbook.org/ns/docbook" xmlns:l="http://docbook.sourceforge.net/xmlns/l10n/1.0" xmlns:xslthl="http://xslthl.sf.net" xmlns:gcse="http://www.google.com" xmlns:date="http://exslt.org/dates-and-times" class="jetty-callout"><h5 class="callout"><a href="http://www.webtide.com/">Contact the core Jetty developers at
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      </p></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="webdefault-xml"></a><code class="literal">webdefault.xml</code></h2></div></div></div><div class="toc"><dl class="toc"><dt><span class="section"><a href="webdefault-xml.html#using-webdefault-xml">Using <code class="literal">webdefault.xml</code></a></span></dt></dl></div><p>The <code class="literal">webdefault.xml</code> file saves web applications from having to define a lot of house-keeping and container-specific elements in their own <code class="literal">web.xml</code> files.
For example, you can use it to set up mime-type mappings and JSP servlet-mappings.
Jetty applies <code class="literal">webdefault.xml</code> to a web application <span class="emphasis"><em>before</em></span> the application&#8217;s own <code class="literal">WEB-INF/web.xml</code>, which means that it cannot override values inside the webapp&#8217;s <code class="literal">web.xml</code>.
It uses the <a class="xref" href="jetty-xml-config.html" title="jetty.xml"><code class="literal">jetty.xml</code></a> syntax.
Generally, it is convenient for all webapps in a Jetty instance to share the same <code class="literal">webdefault.xml</code> file.
However, it is certainly possible to provide differentiated ` webdefault.xml` files for individual web applications.</p><p>The <code class="literal">webdefault.xml</code> file is located in <code class="literal">$(jetty.home)/etc/webdefault.xml</code>.</p><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="using-webdefault-xml"></a>Using <code class="literal">webdefault.xml</code></h3></div></div></div><p>You can specify a custom configuration file to use for specific webapps, or for all webapps. If you do not specify an alternate defaults descriptor, the $JETTY-HOME/etc/jetty-deploy.xml file will configure jetty to automatically use $JETTY_HOME/etc/<code class="literal">webdefault.xml</code>.</p><div class="section"><div class="titlepage"><div><div><h4 class="title"><a name="creating-custom-webdefault-xml-one-webapp"></a>Creating a Custom <code class="literal">webdefault.xml</code> for One WebApp</h4></div></div></div><p>You can specify a custom <code class="literal">webdefault.xml</code> for an individual web application in that webapp&#8217;s <a class="xref" href="jetty-xml-config.html" title="jetty.xml"><code class="literal">jetty.xml</code></a> as follows:</p><pre xmlns:jfetch="java:org.eclipse.jetty.xslt.tools.JavaSourceFetchExtension" xmlns:fetch="java:org.eclipse.jetty.xslt.tools.SourceFetchExtension" xmlns:d="http://docbook.org/ns/docbook" xmlns:l="http://docbook.sourceforge.net/xmlns/l10n/1.0" xmlns:xslthl="http://xslthl.sf.net" xmlns:gcse="http://www.google.com" xmlns:date="http://exslt.org/dates-and-times"><code>&lt;Configure class="org.eclipse.jetty.webapp.WebAppContext"&gt;
  ...
  &lt;!-- Set up the absolute path to the custom webdefault.xml --&gt;
  &lt;Set name="defaultsDescriptor"&gt;/my/path/to/webdefault.xml&lt;/Set&gt;
  ...
&lt;/Configure&gt;</code></pre><p>The equivalent in code is:</p><pre xmlns:jfetch="java:org.eclipse.jetty.xslt.tools.JavaSourceFetchExtension" xmlns:fetch="java:org.eclipse.jetty.xslt.tools.SourceFetchExtension" xmlns:d="http://docbook.org/ns/docbook" xmlns:l="http://docbook.sourceforge.net/xmlns/l10n/1.0" xmlns:xslthl="http://xslthl.sf.net" xmlns:gcse="http://www.google.com" xmlns:date="http://exslt.org/dates-and-times"><code>import org.eclipse.jetty.webapp.WebAppContext;

    ...

    WebAppContext wac = new WebAppContext();
    ...
    //Set up the absolute path to the custom webdefault.xml.
    wac.setDefaultsDescriptor("/my/path/to/webdefault.xml");
    ...</code></pre><p>Alternatively, you can use a <a class="xref" href="jetty-classloading.html" title="Jetty Classloading">Jetty Classloading</a> to find the resource representing your custom <code class="literal">webdefault.xml</code>.</p></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a name="creating-custom-webdefault-xml-multiple-webapps"></a>Creating a Custom <code class="literal">webdefault.xml</code> for Multiple WebApps</h4></div></div></div><p>If you want to apply the same custom <code class="literal">webdefault.xml</code> to a number of webapps, provide the path to the file in <a class="xref" href="jetty-xml-config.html" title="jetty.xml"><code class="literal">jetty.xml</code></a> in the $JETTY_HOME/etc/jetty-deploy.xml file:</p><pre xmlns:jfetch="java:org.eclipse.jetty.xslt.tools.JavaSourceFetchExtension" xmlns:fetch="java:org.eclipse.jetty.xslt.tools.SourceFetchExtension" xmlns:d="http://docbook.org/ns/docbook" xmlns:l="http://docbook.sourceforge.net/xmlns/l10n/1.0" xmlns:xslthl="http://xslthl.sf.net" xmlns:gcse="http://www.google.com" xmlns:date="http://exslt.org/dates-and-times"><code>   &lt;Set name="defaultsDescriptor"&gt;&lt;Property name="jetty.home" default="." /&gt;/other/path/to/another/webdefault.xml&lt;/Set&gt;</code></pre></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a name="webdefault-xml-using-jetty-maven-plugin"></a>Using the Jetty Maven Plugin</h4></div></div></div><p>Similarly, when using the <a class="link" href="jetty-maven-plugin.html" title="Configuring the Jetty Maven Plugin">Jetty Maven Plugin</a> you provide a customized <code class="literal">webdefault.xml</code> file for your webapp as follows:</p><pre xmlns:jfetch="java:org.eclipse.jetty.xslt.tools.JavaSourceFetchExtension" xmlns:fetch="java:org.eclipse.jetty.xslt.tools.SourceFetchExtension" xmlns:d="http://docbook.org/ns/docbook" xmlns:l="http://docbook.sourceforge.net/xmlns/l10n/1.0" xmlns:xslthl="http://xslthl.sf.net" xmlns:gcse="http://www.google.com" xmlns:date="http://exslt.org/dates-and-times"><code>&lt;project&gt;
    ...
    &lt;plugins&gt;
        &lt;plugin&gt;
            ...
            &lt;artifactId&gt;jetty-maven-plugin&lt;/artifactId&gt;
            &lt;configuration&gt;
                &lt;webApp&gt;
                  ...
                  &lt;defaultsDescriptor&gt;/my/path/to/webdefault.xml&lt;/defaultsDescriptor&gt;
                &lt;/webApp&gt;
            &lt;/configuration&gt;
        &lt;/plugin&gt;
        ...
    &lt;/plugins&gt;
    ...
&lt;/project&gt;</code></pre></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a name="webdefault-xml-additional-resources"></a>Additional Resources</h4></div></div></div><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><a class="xref" href="jetty-web-xml-config.html" title="jetty-web.xml"><code class="literal">jetty-web.xml</code></a> &#8211;Reference for <code class="literal">web.xml</code> files</li><li class="listitem"><a class="xref" href="override-web-xml.html" title="Jetty override-web.xml">Jetty <code class="literal">override-web.xml</code></a> &#8211;Information for this <code class="literal">web.xml</code> -formatted file, applied after the webapp&#8217;s <code class="literal">web.xml</code> webapp.</li><li class="listitem"><a class="xref" href="jetty-xml-config.html" title="jetty.xml"><code class="literal">jetty.xml</code></a> &#8211;Reference for <code class="literal">jetty.xml</code> files</li></ul></div></div></div></div><script type="text/javascript">
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