A sample web.xml (servlet 2.5)

This is a sample web.xml based on Servlet 2.5 (part of Java EE 5) that declares common elements. All top-level elements are optional, and can be in any order.

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">

 <context-param>
   <param-name>debug</param-name>
   <param-value>false</param-value>
 </context-param>

 <session-config>  <!--  10 minutes -->
   <session-timeout>10</session-timeout>
 </session-config>

 <servlet>
   <display-name>Servlet1</display-name>
   <servlet-name>Servlet1</servlet-name>
   <servlet-class>test.Servlet1</servlet-class>
   <init-param>
     <param-name>sleep-time-in-seconds</param-name>
     <param-value>10</param-value>
   </init-param>
   <load-on-startup>1</load-on-startup>
 </servlet>

 <servlet-mapping>
   <servlet-name>Servlet1</servlet-name>
   <url-pattern>/Servlet1</url-pattern>
 </servlet-mapping>

 <env-entry>
   <description>admin email</description>
   <env-entry-name>adminEmail</env-entry-name>
   <env-entry-value>admin@example.x</env-entry-value>
 </env-entry>

 <resource-ref>
   <res-ref-name>HRDS</res-ref-name>
   <res-type>javax.sql.DataSource</res-type>
   <mapped-name>jdbc/__default</mapped-name>
 </resource-ref>

 <filter>
   <display-name>Filter1</display-name>
   <filter-name>Filter1</filter-name>
   <filter-class>Filter1</filter-class>
 </filter>

 <filter-mapping>
   <filter-name>Filter1</filter-name>
   <url-pattern>/Filter1</url-pattern>
 </filter-mapping>

 <filter-mapping>
   <filter-name>Filter1</filter-name>
   <servlet-name>Servlet1</servlet-name>
   <dispatcher>REQUEST</dispatcher>
   <dispatcher>FORWARD</dispatcher>
   <dispatcher>INCLUDE</dispatcher>
   <dispatcher>ERROR</dispatcher>
 </filter-mapping>

 <listener>
   <listener-class>Listener1</listener-class>
 </listener>

 <welcome-file-list>
   <welcome-file>index.html</welcome-file>
   <welcome-file>index.htm</welcome-file>
   <welcome-file>index.jsp</welcome-file>
   <welcome-file>default.html</welcome-file>
   <welcome-file>default.htm</welcome-file>
   <welcome-file>default.jsp</welcome-file>
 </welcome-file-list>

</web-app>