升级Tomcat版本 apache-tomcat-7.0.77
diff --git a/tomcat-uid/webapps/docs/class-loader-howto.html b/tomcat-uid/webapps/docs/class-loader-howto.html
index e010551..2a92f5b 100644
--- a/tomcat-uid/webapps/docs/class-loader-howto.html
+++ b/tomcat-uid/webapps/docs/class-loader-howto.html
@@ -1,9 +1,84 @@
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+<html><head><META http-equiv="Content-Type" content="text/html; charset=iso-8859-1"><title>Apache Tomcat 7 (7.0.77) - Class Loader HOW-TO</title><meta name="author" content="Craig R. McClanahan"><meta name="author" content="Yoav Shapira"><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 6.0</font></h1><font face="arial,helvetica,sanserif">Version 6.0.41, May 19 2014</font></td><td><!--APACHE LOGO--><a href="http://www.apache.org/"><img src="./images/asf-logo.gif" align="right" alt="Apache Logo" border="0"></a></td></tr></table><table border="0" width="100%" cellspacing="4"><!--HEADER SEPARATOR--><tr><td colspan="2"><hr noshade="noshade" size="1"></td></tr><tr><!--LEFT SIDE NAVIGATION--><td width="20%" valign="top" nowrap="nowrap" class="noPrint"><p><strong>Links</strong></p><ul><li><a href="index.html">Docs Home</a></li><li><a href="http://wiki.apache.org/tomcat/FAQ">FAQ</a></li></ul><p><strong>User Guide</strong></p><ul><li><a href="introduction.html">1) Introduction</a></li><li><a href="setup.html">2) Setup</a></li><li><a href="appdev/index.html">3) First webapp</a></li><li><a href="deployer-howto.html">4) Deployer</a></li><li><a href="manager-howto.html">5) Manager</a></li><li><a href="realm-howto.html">6) Realms and AAA</a></li><li><a href="security-manager-howto.html">7) Security Manager</a></li><li><a href="jndi-resources-howto.html">8) JNDI Resources</a></li><li><a href="jndi-datasource-examples-howto.html">9) JDBC DataSources</a></li><li><a href="class-loader-howto.html">10) Classloading</a></li><li><a href="jasper-howto.html">11) JSPs</a></li><li><a href="ssl-howto.html">12) SSL</a></li><li><a href="ssi-howto.html">13) SSI</a></li><li><a href="cgi-howto.html">14) CGI</a></li><li><a href="proxy-howto.html">15) Proxy Support</a></li><li><a href="mbeans-descriptor-howto.html">16) MBean Descriptor</a></li><li><a href="default-servlet.html">17) Default Servlet</a></li><li><a href="cluster-howto.html">18) Clustering</a></li><li><a href="balancer-howto.html">19) Load Balancer</a></li><li><a href="connectors.html">20) Connectors</a></li><li><a href="monitoring.html">21) Monitoring and Management</a></li><li><a href="logging.html">22) Logging</a></li><li><a href="apr.html">23) APR/Native</a></li><li><a href="virtual-hosting-howto.html">24) Virtual Hosting</a></li><li><a href="aio.html">25) Advanced IO</a></li><li><a href="extras.html">26) Additional Components</a></li><li><a href="maven-jars.html">27) Mavenized</a></li></ul><p><strong>Reference</strong></p><ul><li><a href="RELEASE-NOTES.txt">Release Notes</a></li><li><a href="config/index.html">Configuration</a></li><li><a href="api/index.html">Javadocs</a></li><li><a href="http://tomcat.apache.org/connectors-doc/">JK 1.2 Documentation</a></li></ul><p><strong>Apache Tomcat Development</strong></p><ul><li><a href="building.html">Building</a></li><li><a href="changelog.html">Changelog</a></li><li><a href="http://wiki.apache.org/tomcat/TomcatVersions">Status</a></li><li><a href="developers.html">Developers</a></li><li><a href="architecture/index.html">Architecture</a></li><li><a href="funcspecs/index.html">Functional Specs.</a></li></ul></td><!--RIGHT SIDE MAIN BODY--><td width="80%" valign="top" align="left" id="mainBody"><h1>Apache Tomcat 6.0</h1><h2>Class Loader HOW-TO</h2><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>

+    " 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="http://wiki.apache.org/tomcat/FAQ">FAQ</a></li><li><a href="#comments_section">User Comments</a></li></ul><p><strong>User Guide</strong></p><ul><li><a href="introduction.html">1) Introduction</a></li><li><a href="setup.html">2) Setup</a></li><li><a href="appdev/index.html">3) First webapp</a></li><li><a href="deployer-howto.html">4) Deployer</a></li><li><a href="manager-howto.html">5) Manager</a></li><li><a href="realm-howto.html">6) Realms and AAA</a></li><li><a href="security-manager-howto.html">7) Security Manager</a></li><li><a href="jndi-resources-howto.html">8) JNDI Resources</a></li><li><a href="jndi-datasource-examples-howto.html">9) JDBC DataSources</a></li><li><a href="class-loader-howto.html">10) Classloading</a></li><li><a href="jasper-howto.html">11) JSPs</a></li><li><a href="ssl-howto.html">12) SSL/TLS</a></li><li><a href="ssi-howto.html">13) SSI</a></li><li><a href="cgi-howto.html">14) CGI</a></li><li><a href="proxy-howto.html">15) Proxy Support</a></li><li><a href="mbeans-descriptors-howto.html">16) MBeans Descriptors</a></li><li><a href="default-servlet.html">17) Default Servlet</a></li><li><a href="cluster-howto.html">18) Clustering</a></li><li><a href="balancer-howto.html">19) Load Balancer</a></li><li><a href="connectors.html">20) Connectors</a></li><li><a href="monitoring.html">21) Monitoring and Management</a></li><li><a href="logging.html">22) Logging</a></li><li><a href="apr.html">23) APR/Native</a></li><li><a href="virtual-hosting-howto.html">24) Virtual Hosting</a></li><li><a href="aio.html">25) Advanced IO</a></li><li><a href="extras.html">26) Additional Components</a></li><li><a href="maven-jars.html">27) Mavenized</a></li><li><a href="security-howto.html">28) Security Considerations</a></li><li><a href="windows-service-howto.html">29) Windows Service</a></li><li><a href="windows-auth-howto.html">30) Windows Authentication</a></li><li><a href="jdbc-pool.html">31) Tomcat's JDBC Pool</a></li><li><a href="web-socket-howto.html">32) WebSocket</a></li></ul><p><strong>Reference</strong></p><ul><li><a href="RELEASE-NOTES.txt">Release Notes</a></li><li><a href="config/index.html">Configuration</a></li><li><a href="api/index.html">Tomcat Javadocs</a></li><li><a href="servletapi/index.html">Servlet Javadocs</a></li><li><a href="jspapi/index.html">JSP 2.2 Javadocs</a></li><li><a href="elapi/index.html">EL 2.2 Javadocs</a></li><li><a href="websocketapi/index.html">WebSocket 1.1 Javadocs</a></li><li><a href="http://tomcat.apache.org/connectors-doc/">JK 1.2 Documentation</a></li></ul><p><strong>Apache Tomcat Development</strong></p><ul><li><a href="building.html">Building</a></li><li><a href="changelog.html">Changelog</a></li><li><a href="http://wiki.apache.org/tomcat/TomcatVersions">Status</a></li><li><a href="developers.html">Developers</a></li><li><a href="architecture/index.html">Architecture</a></li><li><a href="funcspecs/index.html">Functional Specs.</a></li><li><a href="tribes/introduction.html">Tribes</a></li></ul></td><!--RIGHT SIDE MAIN BODY--><td width="80%" valign="top" align="left" id="mainBody"><h1>Class Loader HOW-TO</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="#Overview">Overview</a></li><li><a href="#Class_Loader_Definitions">Class Loader Definitions</a></li><li><a href="#XML_Parsers_and_Java">XML Parsers and Java</a></li><li><a href="#Running_under_a_security_manager">Running under a security manager</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="Overview"><strong>Overview</strong></a></font></td></tr><tr><td><blockquote>

 

@@ -27,15 +102,13 @@
 organized into the following parent-child relationships, where the parent

 class loader is above the child class loader:</p>

 

-<div align="left"><table cellspacing="4" cellpadding="0" border="0"><tr><td bgcolor="#023264" width="1" height="1"><img src="./images/void.gif" alt="" width="1" height="1" vspace="0" hspace="0" border="0"></td><td bgcolor="#023264" height="1"><img src="./images/void.gif" alt="" width="1" height="1" vspace="0" hspace="0" border="0"></td><td bgcolor="#023264" width="1" height="1"><img src="./images/void.gif" alt="" width="1" height="1" vspace="0" hspace="0" border="0"></td></tr><tr><td bgcolor="#023264" width="1"><img src="./images/void.gif" alt="" width="1" height="1" vspace="0" hspace="0" border="0"></td><td bgcolor="#ffffff" height="1"><pre>

-      Bootstrap

+<div class="codeBox"><pre><code>      Bootstrap

           |

        System

           |

        Common

        /     \

-  Webapp1   Webapp2 ... 

-</pre></td><td bgcolor="#023264" width="1"><img src="./images/void.gif" alt="" width="1" height="1" vspace="0" hspace="0" border="0"></td></tr><tr><td bgcolor="#023264" width="1" height="1"><img src="./images/void.gif" alt="" width="1" height="1" vspace="0" hspace="0" border="0"></td><td bgcolor="#023264" height="1"><img src="./images/void.gif" alt="" width="1" height="1" vspace="0" hspace="0" border="0"></td><td bgcolor="#023264" width="1" height="1"><img src="./images/void.gif" alt="" width="1" height="1" vspace="0" hspace="0" border="0"></td></tr></table></div>

+  Webapp1   Webapp2 ...</code></pre></div>

 

 <p>The characteristics of each of these class loaders, including the source

 of classes and resources that they make visible, are discussed in detail in

@@ -43,7 +116,7 @@
 

 </blockquote></td></tr></table><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Class Loader Definitions"><!--()--></a><a name="Class_Loader_Definitions"><strong>Class Loader Definitions</strong></a></font></td></tr><tr><td><blockquote>

 

-<p>As indicated in the diagram above, Tomcat 6 creates the following class

+<p>As indicated in the diagram above, Tomcat creates the following class

 loaders as it is initialized:</p>

 <ul>

 <li><p><strong>Bootstrap</strong> &mdash; This class loader contains the basic

@@ -65,34 +138,26 @@
     <li><p><em>$CATALINA_HOME/bin/bootstrap.jar</em> &mdash; Contains the

         main() method that is used to initialize the Tomcat server, and the

         class loader implementation classes it depends on.</p></li>

-    <li><p><em>$CATALINA_BASE/bin/tomcat-juli.jar</em> and

+    <li><p><em>$CATALINA_BASE/bin/tomcat-juli.jar</em> or

         <em>$CATALINA_HOME/bin/tomcat-juli.jar</em> &mdash; Logging

         implementation classes. These include enhancement classes to

         <code>java.util.logging</code> API, known as Tomcat JULI,

         and a package-renamed copy of Apache Commons Logging library

         used internally by Tomcat.

         See <a href="logging.html">logging documentation</a> for more

-        details.</p></li>

+        details.</p>

+        <p>If <code>tomcat-juli.jar</code> is present in

+        <em>$CATALINA_BASE/bin</em>, it is used instead of the one in

+        <em>$CATALINA_HOME/bin</em>. It is useful in certain logging

+        configurations</p></li>

     <li><p><em>$CATALINA_HOME/bin/commons-daemon.jar</em> &mdash; The classes

         from <a href="http://commons.apache.org/daemon/">Apache Commons

-        Daemon</a> project.</p></li>

+        Daemon</a> project.

+        This JAR file is not present in the <code>CLASSPATH</code> built by

+        <code>catalina.bat</code>|<code>.sh</code> scripts, but is referenced

+        from the manifest file of <em>bootstrap.jar</em>.</p></li>

     </ul>

-    <p>The <em>tomcat-juli.jar</em> and <em>commons-daemon.jar</em> JARs in

-    <em>$CATALINA_HOME/bin</em> are not present in the <code>CLASSPATH</code>

-    built by <code>catalina.bat</code>|<code>.sh</code> scripts, but are

-    referenced from the manifest file of <em>bootstrap.jar</em>.

-    </p>

-    <p>If <em>$CATALINA_BASE</em> and <em>$CATALINA_HOME</em> do differ and

-    <em>$CATALINA_BASE/bin/tomcat-juli.jar</em> does exist, the startup scripts

-    will add it to <code>CLASSPATH</code> before <em>bootstrap.jar</em>, so

-    that Java will look into <em>$CATALINA_BASE/bin/tomcat-juli.jar</em> for

-    classes before it will look into <em>$CATALINA_HOME/bin/tomcat-juli.jar</em>

-    referenced by <em>bootstrap.jar</em>. It should work in most cases but,

-    if you are using such configuration, it might be recommended to remove

-    <em>tomcat-juli.jar</em> from <em>$CATALINA_HOME/bin</em> so that only

-    one copy of the file is present on the classpath. The next version of

-    Tomcat, Tomcat 7, takes different approach here.

-    </p></li>

+    </li>

 <li><p><strong>Common</strong> &mdash; This class loader contains additional

     classes that are made visible to both Tomcat internal classes and to all

     web applications.</p>

@@ -116,19 +181,27 @@
     <li><em>catalina-ha.jar</em> &mdash; High availability package.</li>

     <li><em>catalina-tribes.jar</em> &mdash; Group communication package.</li>

     <li><em>ecj-*.jar</em> &mdash; Eclipse JDT Java compiler.</li>

-    <li><em>el-api.jar</em> &mdash; EL 2.1 API.</li>

+    <li><em>el-api.jar</em> &mdash; EL 2.2 API.</li>

     <li><em>jasper.jar</em> &mdash; Tomcat Jasper JSP Compiler and Runtime.</li>

     <li><em>jasper-el.jar</em> &mdash; Tomcat Jasper EL implementation.</li>

-    <li><em>jsp-api.jar</em> &mdash; JSP 2.1 API.</li>

-    <li><em>servlet-api.jar</em> &mdash; Servlet 2.5 API.</li>

+    <li><em>jsp-api.jar</em> &mdash; JSP 2.2 API.</li>

+    <li><em>servlet-api.jar</em> &mdash; Servlet 3.0 API.</li>

+    <li><em>tomcat-api.jar</em> &mdash; Several interfaces defined by Tomcat.</li>

     <li><em>tomcat-coyote.jar</em> &mdash; Tomcat connectors and utility classes.</li>

     <li><em>tomcat-dbcp.jar</em> &mdash; Database connection pool

         implementation based on package-renamed copy of Apache Commons Pool

         and Apache Commons DBCP.</li>

     <li><em>tomcat-i18n-**.jar</em> &mdash; Optional JARs containing resource bundles

-        for other languages. As default bundles are also included in each 

+        for other languages. As default bundles are also included in each

         individual JAR, they can be safely removed if no internationalization

         of messages is needed.</li>

+    <li><em>tomcat-jdbc.jar</em> &mdash; An alternative database connection pool

+        implementation, known as Tomcat JDBC pool. See

+        <a href="jdbc-pool.html">documentation</a> for more details.</li>

+    <li><em>tomcat-util.jar</em> &mdash; Common classes used by various components of

+        Apache Tomcat.</li>

+    <li><em>tomcat7-websocket.jar</em> &mdash; WebSocket 1.1 implementation</li>

+    <li><em>websocket-api.jar</em> &mdash; WebSocket 1.1 API</li>

     </ul></li>

 <li><p><strong>WebappX</strong> &mdash; A class loader is created for each web

     application that is deployed in a single Tomcat instance.  All unpacked

@@ -139,30 +212,42 @@
 </ul>

 

 <p>As mentioned above, the web application class loader diverges from the

-default Java 2 delegation model (in accordance with the recommendations in the

-Servlet Specification, version 2.4, section 9.7.2 Web Application Classloader).  

+default Java delegation model (in accordance with the recommendations in the

+Servlet Specification, version 2.4, section 9.7.2 Web Application Classloader).

 When a request to load a

 class from the web application's <em>WebappX</em> class loader is processed,

 this class loader will look in the local repositories <strong>first</strong>,

 instead of delegating before looking.  There are exceptions. Classes which are

-part of the JRE base classes cannot be overriden. For some classes (such as

-the XML parser components in J2SE 1.4+), the J2SE 1.4 endorsed feature can be 

+part of the JRE base classes cannot be overridden. For some classes (such as

+the XML parser components in J2SE 1.4+), the J2SE 1.4 endorsed feature can be

 used.

 Last, any JAR file that contains Servlet API classes will be explicitly

 ignored by the classloader &mdash; Do not include such JARs in your web

 application.

-All other class loaders in Tomcat 6 follow the usual delegation pattern.</p>

+All other class loaders in Tomcat follow the usual delegation pattern.</p>

 

 <p>Therefore, from the perspective of a web application, class or resource

 loading looks in the following repositories, in this order:</p>

 <ul>

 <li>Bootstrap classes of your JVM</li>

-<li>System class loader classes (described above)</li>

 <li><em>/WEB-INF/classes</em> of your web application</li>

 <li><em>/WEB-INF/lib/*.jar</em> of your web application</li>

+<li>System class loader classes (described above)</li>

 <li>Common class loader classes (described above)</li>

 </ul>

 

+<p>If the web application class loader is

+<a href="config/loader.html">configured</a> with

+<code>&lt;Loader delegate="true"/&gt;</code>

+then the order becomes:</p>

+<ul>

+<li>Bootstrap classes of your JVM</li>

+<li>System class loader classes (described above)</li>

+<li>Common class loader classes (described above)</li>

+<li><em>/WEB-INF/classes</em> of your web application</li>

+<li><em>/WEB-INF/lib/*.jar</em> of your web application</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="XML Parsers and Java"><!--()--></a><a name="XML_Parsers_and_Java"><strong>XML Parsers and Java</strong></a></font></td></tr><tr><td><blockquote>

 

 <p>Starting with Java 1.4 a copy of JAXP APIs and an XML parser are packed

@@ -196,6 +281,31 @@
 file. See <a href="security-manager-howto.html">Security Manager HOW-TO</a>

 for further information.</p>

 

-</blockquote></td></tr></table></td></tr><!--FOOTER SEPARATOR--><tr><td colspan="2"><hr noshade="noshade" size="1"></td></tr><!--PAGE FOOTER--><tr><td colspan="2"><div align="center"><font color="#525D76" size="-1"><em>

-        Copyright &copy; 1999-2014, Apache Software Foundation

+</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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