Detailed explanation of setting Context Path in Web application

URL: http://hostname.com/contextPath/servletPath/pathInfo

Jetty

If contextPath is not specified, the root context is used by default, and the path of the root context is "/".

warName.war

Without XML IoC file:

• If the WAR file name is myapp.war, then the context path is: /myapp;
• If the WAR file name is ROOT.war, then the context path is: /;
• If the WAR file name is ROOT-foobar.war, then the context path is / and the virtual host is foobar.

WEB-INF/jetty-web.xml

<Configureclass="org.eclipse.jetty.webapp.WebAppContext">
  <Setname="contextPath">/test</Set>
  ...
</Configure>

Tomcat

Individual <context> elements can be defined in a number of ways:

• Defined in the /META-INF/context.xml file of the web application. When the copyXML attribute of the Host is true, the context.xml file will be copied to the $CATALINA_BASE/conf/[enginename]/[hostname] directory and renamed. The naming convention refers to the description of the /META-INF/context.xml section.
• Place an XML file directly in the $CATALINA_BASE/conf/[enginename]/[hostname] directory. The file name specification and content refer to the description of the META-INF/context.xml section. This file has a higher priority than /META-INF/context.xml.
• Define a <Context> element in the <Host> element of the Tomcat server's conf/server.xml file.

META-INF/context.xml

There is a close relationship between context name, context path, context version and base file name:

• If there is no contextversion, then the context name and context path are the same;
• If contextpath is an empty string, base name is ROOT;
• If contextpath is not an empty string, base name = context path, where the first / character has been removed and the / character has been replaced with the # character.

For example:

Server.xml

It is not recommended to add the <context> element in the conf/server.xml file, because this file can only be reloaded by restarting Tomcat, which affects the normal use of other WebAPPs.

Default context.xml

Tomcat has a default context element, which applies to all applications, but its priority is also the lowest, and all configurations can be overwritten by the application.

There are two default context.xml files:

• One is $CATALINA_BASE/conf/context.xml. The information in this context element will be loaded by all applications.
• One is $CATELINA_BASE/conf/[enginename]/[hostname]/context.xml.default. The information in this <context> element will be loaded by all applications in this virtual host.

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