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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="https://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 7.0.103, Mar 16 2020</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="https://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="host-manager-howto.html">6) Host Manager</a></li><li><a href="realm-howto.html">7) Realms and AAA</a></li><li><a href="security-manager-howto.html">8) Security Manager</a></li><li><a href="jndi-resources-howto.html">9) JNDI Resources</a></li><li><a href="jndi-datasource-examples-howto.html">10) JDBC DataSources</a></li><li><a href="class-loader-howto.html">11) Classloading</a></li><li><a href="jasper-howto.html">12) JSPs</a></li><li><a href="ssl-howto.html">13) SSL/TLS</a></li><li><a href="ssi-howto.html">14) SSI</a></li><li><a href="cgi-howto.html">15) CGI</a></li><li><a href="proxy-howto.html">16) Proxy Support</a></li><li><a href="mbeans-descriptors-howto.html">17) MBeans Descriptors</a></li><li><a href="default-servlet.html">18) Default Servlet</a></li><li><a href="cluster-howto.html">19) Clustering</a></li><li><a href="balancer-howto.html">20) Load Balancer</a></li><li><a href="connectors.html">21) Connectors</a></li><li><a href="monitoring.html">22) Monitoring and Management</a></li><li><a href="logging.html">23) Logging</a></li><li><a href="apr.html">24) APR/Native</a></li><li><a href="virtual-hosting-howto.html">25) Virtual Hosting</a></li><li><a href="aio.html">26) Advanced IO</a></li><li><a href="extras.html">27) Additional Components</a></li><li><a href="maven-jars.html">28) Mavenized</a></li><li><a href="security-howto.html">29) Security Considerations</a></li><li><a href="windows-service-howto.html">30) Windows Service</a></li><li><a href="windows-auth-howto.html">31) Windows Authentication</a></li><li><a href="jdbc-pool.html">32) Tomcat's JDBC Pool</a></li><li><a href="web-socket-howto.html">33) 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="annotationapi/index.html">Common Annotations 1.1 Javadocs</a></li><li><a href="https://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="https://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>Building Tomcat</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="#Download_Java_Development_Kit_(JDK)_versions_6_and_7">Download Java Development Kit (JDK) versions 6 and 7</a></li><li><a href="#Install_Apache_Ant_1.8.2_or_later">Install Apache Ant 1.8.2 or later</a></li><li><a href="#Checkout_or_obtain_the_source_code_for_Tomcat_7.0">Checkout or obtain the source code for Tomcat 7.0</a></li><li><a href="#Configure_download_area">Configure download area</a></li><li><a href="#Building_Tomcat">Building Tomcat</a></li><li><a href="#Building_with_Eclipse">Building with Eclipse</a></li><li><a href="#Building_with_other_IDEs">Building with other IDEs</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>
Building Apache Tomcat from source is very easy, and is the first step to
contributing to Tomcat. The complete and comprehensive instructions are
provided in the file <a href="BUILDING.txt">BUILDING.txt</a>.
The following is a quick step by step guide.
</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="Download Java Development Kit (JDK) versions 6 and 7"><!--()--></a><a name="Download_Java_Development_Kit_(JDK)_versions_6_and_7"><strong>Download Java Development Kit (JDK) versions 6 and 7</strong></a></font></td></tr><tr><td><blockquote>
<p>
Building Apache Tomcat requires a Java 6 JDK to be installed and optionally
a Java 7 JDK installed in parallel with Java 6 one. The Java 7 JDK is only
required if you wish to build Tomcat with JSR-356 (Java WebSocket 1.1)
support.
</p>
<p>
You can download JDKs from Oracle<br>
<a href="http://www.oracle.com/technetwork/java/javase/downloads/index.html">http://www.oracle.com/technetwork/java/javase/downloads/index.html</a><br>
or from another JDK vendor.
</p>
<p>
<b>IMPORTANT</b>: Set an environment variable JAVA_HOME to the pathname of
the directory into which you installed the Java 6 JDK. The path to Java 7
JDK is configured in <code>build.properties</code> file (see below).
</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="Install Apache Ant 1.8.2 or later"><!--()--></a><a name="Install_Apache_Ant_1.8.2_or_later"><strong>Install Apache Ant 1.8.2 or later</strong></a></font></td></tr><tr><td><blockquote>
<p>
Download a binary distribution of Ant 1.8.2 or later from
<a href="https://ant.apache.org/bindownload.cgi">here</a>.
</p>
<p>
Unpack the binary distribution into a convenient location so that the
Ant release resides in its own directory (conventionally named
<code>apache-ant-1.8.x</code>). For the remainder of this guide,
the symbolic name <code>${ant.home}</code> is used to refer to the full pathname of
the Ant installation directory.
</p>
<p>
<b>IMPORTANT</b>: Create an ANT_HOME environment variable to point the directory <code>${ant.home}</code>,
and modify the PATH environment variable to include directory
<code>${ant.home}/bin</code> in its list. This makes the <code>ant</code> command line script
available, which will be used to actually perform the build.
</p>
</blockquote></td></tr></table><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Checkout or obtain the source code for Tomcat 7.0"><!--()--></a><a name="Checkout_or_obtain_the_source_code_for_Tomcat_7.0"><strong>Checkout or obtain the source code for Tomcat 7.0</strong></a></font></td></tr><tr><td><blockquote>
<p>
Tomcat 7.0 SVN repository URL:
<a href="https://svn.apache.org/repos/asf/tomcat/tc7.0.x/trunk/">https://svn.apache.org/repos/asf/tomcat/tc7.0.x/trunk/</a>
</p>
<p>
Tomcat source packages:
<a href="https://tomcat.apache.org/download-70.cgi">https://tomcat.apache.org/download-70.cgi</a>.
</p>
<p>
Checkout the source using SVN, selecting a tag for released version or
trunk for the current development code, or download and unpack a
source package. For the remainder of this guide, the symbolic name
<code>${tomcat.source}</code> is used to refer to the
location where the source has been placed.
</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="Configure download area"><!--()--></a><a name="Configure_download_area"><strong>Configure download area</strong></a></font></td></tr><tr><td><blockquote>
<p>
Building Tomcat involves downloading a number of libraries that it depends on.
It is strongly recommended to configure download area for those libraries.
</p>
<p>
By default the build is configured to download the dependencies into the
<code>${user.home}/tomcat-build-libs</code> directory. You can change this
(see below) but it must be an absolute path.
</p>
<p>
The build is controlled by creating a
<code>${tomcat.source}/build.properties</code> file. It can be used to
redefine any property that is present in <code>build.properties.default</code>
and <code>build.xml</code> files. The <code>build.properties</code> file
does not exist by default. You have to create it.
</p>
<p>
The download area is defined by property <code>base.path</code>. For example:
</p>
<div class="codeBox"><pre><code># ----- Default Base Path for Dependent Packages -----
# Replace this path with the directory path where
# dependencies binaries should be downloaded.
base.path=/home/me/some-place-to-download-to</code></pre></div>
<p>
Different versions of Tomcat are allowed to share the same download area.
</p>
<p>
Another example:
</p>
<div class="codeBox"><pre><code>base.path=${user.dir}/../libraries-tomcat7.0</code></pre></div>
<p>
Users who access the Internet through a proxy must use the properties
file to indicate to Ant the proxy configuration:
</p>
<div class="codeBox"><pre><code># ----- Proxy setup -----
proxy.host=proxy.domain
proxy.port=8080
proxy.use=on</code></pre></div>
</blockquote></td></tr></table><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Building Tomcat"><!--()--></a><a name="Building_Tomcat"><strong>Building Tomcat</strong></a></font></td></tr><tr><td><blockquote>
<p>
If you have installed a Java 7 JDK and wish to build Tomcat with JSR-356
(Java WebSocket 1.1) support, set <code>java.7.home</code> property in
file <code>${tomcat.source}/build.properties</code> to the location of
the Java 7 JDK installation.
</p>
<p>
An example, using 32-bit JDK on a 64-bit Windows system:
</p>
<div class="codeBox"><pre><code># Location of Java 7 JDK
java.7.home=C:/Program Files (x86)/Java/jdk1.7.0_72</code></pre></div>
<p>
Use the following commands to build Tomcat:
</p>
<p>
<code>cd ${tomcat.source}</code><br>
<code>ant</code>
</p>
<p>
Once the build has completed successfully, a usable Tomcat installation will have been
produced in the <code>${tomcat.source}/output/build</code> directory, and can be started
and stopped with the usual scripts.
</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="Building with Eclipse"><!--()--></a><a name="Building_with_Eclipse"><strong>Building with Eclipse</strong></a></font></td></tr><tr><td><blockquote>
<p>
<b>IMPORTANT:</b> This is not a supported means of building Tomcat; this information is
provided without warranty :-).
The only supported means of building Tomcat is with the Ant build described above.
However, some developers like to work on Java code with a Java IDE,
and the following steps have been used by some developers.
</p>
<p>
<b>NOTE:</b> This will not let you build everything under Eclipse;
the build process requires use of Ant for the many stages that aren't
simple Java compilations.
However, it will allow you to view and edit the Java code,
get warnings, reformat code, perform refactorings, run Tomcat
under the IDE, and so on.
</p>
<p>
<b>WARNING:</b> Do not forget to create and configure
<code>${tomcat.source}/build.properties</code> file as described above
before running any Ant targets.
</p>
<p>
Sample Eclipse project files and launch targets are provided in the
<code>res/ide-support/eclipse</code> directory of the source tree.
The instructions below will automatically copy these into the required locations.
</p>
<p>
Two Ant targets are provided as a convenience. The first one, named
<em>ide-eclipse</em>, downloads all binary dependencies and configures
Eclipse project in the root of the source tree. The created Eclipse project
targets a Java 6 JDK and skips WebSocket classes that cannot be compiled with
Java 6.
</p>
<p>
The second target, named <em>ide-eclipse-websocket</em>, creates directory
<code>../tomcat-7.0.x-java7</code> and configures the second Eclipse project
there. This project targets a Java 7 JDK. This project does not have its own
source tree, but accesses a subset of the source tree of the first project,
compiling all WebSocket classes that were skipped.
</p>
<p>
<code>cd ${tomcat.source}</code><br>
<code>ant ide-eclipse</code><br>
<code>ant ide-eclipse-websocket</code>
</p>
<p>
Start Eclipse and create a new Workspace.
</p>
<p>
Open the <em>Preferences</em> dialog and then select <em>Java->Build Path->Classpath
Variables</em> to add two new <em>Classpath Variables</em>:
</p>
<table class="defaultTable">
<tr><td>TOMCAT_LIBS_BASE</td><td>The same location as the <code>base.path</code>
setting in <code>build.properties</code>, where the binary dependencies have been downloaded</td></tr>
<tr><td>ANT_HOME</td><td>the base path of Ant 1.8.2 or later</td></tr>
</table>
<p>
In the <em>Preferences</em> dialog go to <em>Java->Installed JREs</em>
and add JDK 6 and JDK 7 there. Close the dialog.
</p>
<p>
Use <em>File->Import</em> command from menu and choose <em>Existing Projects into Workspace</em>.
From there choose the root directory of the Tomcat source tree (<code>${tomcat.source}</code>)
and import the project located there. Import the second project as well,
if you have created it (<code>../tomcat-7.0.x-java7</code>).
</p>
<p>
<code>start-tomcat</code> and <code>stop-tomcat</code> launch configurations are provided in
<code>res/ide-support/eclipse</code> and will be available in the <em>Run->Run Configurations</em>
dialog. Use these to start and stop Tomcat from Eclipse.
If you want to configure these yourself (or are using a different IDE)
then use <code>org.apache.catalina.startup.Bootstrap</code> as the main class,
<code>start</code>/<code>stop</code> etc. as program arguments, and specify <code>-Dcatalina.home=...</code>
(with the name of your build directory) as VM arguments.
</p>
<p>
Tweaking a few formatting preferences will make it much easier to keep consistent with Tomcat
coding conventions (and have your contributions accepted):
</p>
<table class="defaultTable">
<tr><td>Java -> Code Style -> Formatter -> Edit...</td>
<td>Tab policy: Spaces only<br>Tab and Indentation size: 4</td></tr>
<tr><td>General -> Editors -> Text Editors</td>
<td>Displayed tab width: 2<br>Insert spaces for tabs<br>Show whitespace characters (optional)</td></tr>
<tr><td>XML -> XML Files -> Editor</td><td>Indent using spaces<br>Indentation size: 2</td></tr>
<tr><td>Ant -> Editor -> Formatter</td><td>Tab size: 2<br>Use tab character instead of spaces: unchecked</td></tr>
</table>
<p>
The recommended configuration of Compiler Warnings is documented in
<code>res/ide-support/eclipse/java-compiler-errors-warnings.txt</code> file.
</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="Building with other IDEs"><!--()--></a><a name="Building_with_other_IDEs"><strong>Building with other IDEs</strong></a></font></td></tr><tr><td><blockquote>
<p>
The same general approach should work for most IDEs; it has been reported
to work in IntelliJ IDEA, for example.
</p>
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