升级Tomcat版本 apache-tomcat-7.0.77
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+<html><head><META http-equiv="Content-Type" content="text/html; charset=iso-8859-1"><title>Apache Tomcat 7 Configuration Reference (7.0.77) - The Jar Scanner Component</title><style type="text/css" media="print">
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+</style></head><body bgcolor="#ffffff" text="#000000" link="#525D76" alink="#525D76" vlink="#525D76"><table border="0" width="100%" cellspacing="0"><!--PAGE HEADER--><tr><td><!--PROJECT LOGO--><a href="http://tomcat.apache.org/"><img src="../images/tomcat.gif" align="right" alt="
+ The Apache Tomcat Servlet/JSP Container
+ " border="0"></a></td><td><h1><font face="arial,helvetica,sanserif">Apache Tomcat 7</font></h1><font face="arial,helvetica,sanserif">Version 7.0.77, Mar 28 2017</font></td><td><!--APACHE LOGO--><a href="http://www.apache.org/"><img src="../images/asf-logo.svg" align="right" alt="Apache Logo" border="0" style="width: 266px;height: 83px;"></a></td></tr></table><table border="0" width="100%" cellspacing="4"><!--HEADER SEPARATOR--><tr><td colspan="2"><hr noshade size="1"></td></tr><tr><!--LEFT SIDE NAVIGATION--><td width="20%" valign="top" nowrap class="noPrint"><p><strong>Links</strong></p><ul><li><a href="../index.html">Docs Home</a></li><li><a href="index.html">Config Ref. Home</a></li><li><a href="http://wiki.apache.org/tomcat/FAQ">FAQ</a></li><li><a href="#comments_section">User Comments</a></li></ul><p><strong>Top Level Elements</strong></p><ul><li><a href="server.html">Server</a></li><li><a href="service.html">Service</a></li></ul><p><strong>Executors</strong></p><ul><li><a href="executor.html">Executor</a></li></ul><p><strong>Connectors</strong></p><ul><li><a href="http.html">HTTP</a></li><li><a href="ajp.html">AJP</a></li></ul><p><strong>Containers</strong></p><ul><li><a href="context.html">Context</a></li><li><a href="engine.html">Engine</a></li><li><a href="host.html">Host</a></li><li><a href="cluster.html">Cluster</a></li></ul><p><strong>Nested Components</strong></p><ul><li><a href="globalresources.html">Global Resources</a></li><li><a href="jar-scanner.html">JarScanner</a></li><li><a href="listeners.html">Listeners</a></li><li><a href="loader.html">Loader</a></li><li><a href="manager.html">Manager</a></li><li><a href="realm.html">Realm</a></li><li><a href="resources.html">Resources</a></li><li><a href="sessionidgenerator.html">SessionIdGenerator</a></li><li><a href="valve.html">Valve</a></li></ul><p><strong>Cluster Elements</strong></p><ul><li><a href="cluster.html">Cluster</a></li><li><a href="cluster-manager.html">Manager</a></li><li><a href="cluster-channel.html">Channel</a></li><li><a href="cluster-membership.html">Channel/Membership</a></li><li><a href="cluster-sender.html">Channel/Sender</a></li><li><a href="cluster-receiver.html">Channel/Receiver</a></li><li><a href="cluster-interceptor.html">Channel/Interceptor</a></li><li><a href="cluster-valve.html">Valve</a></li><li><a href="cluster-deployer.html">Deployer</a></li><li><a href="cluster-listener.html">ClusterListener</a></li></ul><p><strong>web.xml</strong></p><ul><li><a href="filter.html">Filter</a></li></ul><p><strong>Other</strong></p><ul><li><a href="systemprops.html">System properties</a></li></ul></td><!--RIGHT SIDE MAIN BODY--><td width="80%" valign="top" align="left" id="mainBody"><h1>The Jar Scanner Component</h1><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Table of Contents"><!--()--></a><a name="Table_of_Contents"><strong>Table of Contents</strong></a></font></td></tr><tr><td><blockquote>
+<ul><li><a href="#Introduction">Introduction</a></li><li><a href="#Attributes">Attributes</a><ol><li><a href="#Common_Attributes">Common Attributes</a></li><li><a href="#Standard_Implementation">Standard Implementation</a></li></ol></li><li><a href="#Nested_Components">Nested Components</a></li><li><a href="#Special_Features">Special Features</a></li></ul>
+</blockquote></td></tr></table><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Introduction"><strong>Introduction</strong></a></font></td></tr><tr><td><blockquote>
+
+ <p>The <strong>Jar Scanner</strong> element represents the component that is
+ used to scan the web application for JAR files. It is typically used during
+ web application start to identify configuration files such as TLDs or
+ web-fragment.xml files that must be processed as part of the web application
+ initialisation.</p>
+
+ <p>A Jar Scanner element MAY be nested inside a
+ <a href="context.html">Context</a> component. If it is not included,
+ a default Jar Scanner configuration will be created automatically, which
+ is sufficient for most requirements.</p>
+
+</blockquote></td></tr></table><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Attributes"><strong>Attributes</strong></a></font></td></tr><tr><td><blockquote>
+
+ <table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#828DA6"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Common Attributes"><!--()--></a><a name="Common_Attributes"><strong>Common Attributes</strong></a></font></td></tr><tr><td><blockquote>
+
+ <p>All implementations of <strong>Jar Scanner</strong>
+ support the following attributes:</p>
+
+ <table border="1" cellpadding="5"><tr><th width="15%" bgcolor="#023264"><font color="#ffffff">Attribute</font></th><th width="85%" bgcolor="#023264"><font color="#ffffff">Description</font></th></tr><tr><td align="left" valign="center"><code class="attributeName">className</code></td><td align="left" valign="center">
+ <p>Java class name of the implementation to use. This class must
+ implement the <code>org.apache.tomcat.JarScanner</code> interface.
+ If not specified, the standard value (defined below) will be used.</p>
+ </td></tr></table>
+
+ </blockquote></td></tr></table>
+
+
+ <table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#828DA6"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Standard Implementation"><!--()--></a><a name="Standard_Implementation"><strong>Standard Implementation</strong></a></font></td></tr><tr><td><blockquote>
+
+ <p>The standard implementation of <strong>Jar Scanner</strong> is
+ <strong>org.apache.tomcat.util.scan.StandardJarScanner</strong>.
+ Additional attributes that it supports (in addition to the common attributes
+ listed above) are listed in the table.</p>
+
+ <p>There are several
+ <a href="systemprops.html#JAR_Scanning">system properties</a>
+ that control what JAR files are skipped by JarScanner.
+ Those properties are lists of file name pattern. The
+ patterns are separated by comma (','). The leading and trailing whitespace
+ characters in a pattern are ignored. The patterns are matched
+ case-sensitively. The following two special characters are supported:</p>
+
+ <ul>
+ <li>'*' — means zero or more characters,</li>
+ <li>'?' — means one and only one character.</li>
+ </ul>
+
+ <table border="1" cellpadding="5"><tr><th width="15%" bgcolor="#023264"><font color="#ffffff">Attribute</font></th><th width="85%" bgcolor="#023264"><font color="#ffffff">Description</font></th></tr><tr><td align="left" valign="center"><code class="attributeName">scanAllDirectories</code></td><td align="left" valign="center">
+ <p>If <code>true</code>, any directories found on the classpath will be
+ checked to see if they are expanded JAR files.
+ The default is <code>false</code>.</p>
+ <p>Tomcat determines if a directory is an expanded JAR file by looking
+ for a META-INF sub-directory. Only if the META-INF sub-directory exists,
+ the directory is assumed to be an expanded JAR file.</p>
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">scanAllFiles</code></td><td align="left" valign="center">
+ <p>If <code>true</code>, any files found on the classpath will be checked
+ to see if they are Jar files rather than relying on the file extension
+ being <code>.jar</code>. The default is <code>false</code>.</p>
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">scanClassPath</code></td><td align="left" valign="center">
+ <p>If <code>true</code>, the full web application classpath, including
+ the shared and common classloaders and the system classpath (but not the
+ bootstrap classpath) will be scanned for Jar files in addition to the web
+ application. The default is <code>true</code>. </p>
+ </td></tr><tr><td align="left" valign="center"><code class="attributeName">scanBootstrapClassPath</code></td><td align="left" valign="center">
+ <p>If <strong>scanClassPath</strong> is <code>true</code> and this is
+ <code>true</code> the bootstrap classpath will also be scanned for Jar
+ files. The default is <code>false</code>.</p>
+ </td></tr></table>
+
+ </blockquote></td></tr></table>
+
+
+</blockquote></td></tr></table><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Nested Components"><!--()--></a><a name="Nested_Components"><strong>Nested Components</strong></a></font></td></tr><tr><td><blockquote>
+ <p>No components may be nested inside a <strong>Jar Scanner</strong> element.
+ </p>
+</blockquote></td></tr></table><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Special Features"><!--()--></a><a name="Special_Features"><strong>Special Features</strong></a></font></td></tr><tr><td><blockquote>
+ <p>No special features are associated with a <strong>Jar Scanner</strong>
+ element.</p>
+</blockquote></td></tr></table></td></tr><tr class="noPrint"><td width="20%" valign="top" nowrap class="noPrint"></td><td width="80%" valign="top" align="left"><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="comments_section" id="comments_section"><strong>Comments</strong></a></font></td></tr><tr><td><blockquote><p class="notice"><strong>Notice: </strong>This comments section collects your suggestions
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