web.xml deployment descriptor examples
The web.xml
is a configuration file to describe how a web application should be deployed. Here’re 5 web.xml
examples, just for self-reference.
1. Servlet 3.1 deployment descriptor
Java EE 7 XML schema, namespace is http://xmlns.jcp.org/xml/ns/javaee/
web.xml
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
version="3.1">
</web-app>
2. Servlet 3.0 deployment descriptor
Java EE 6 XML schema, namespace is http://java.sun.com/xml/ns/javaee
web.xml
<web-app 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_3_0.xsd"
version="3.0">
</web-app>
3. Servlet 2.5 deployment descriptor
Java EE 5 XML schema, namespace is http://java.sun.com/xml/ns/javaee
web.xml
<web-app 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"
version="2.5">
</web-app>
4. Servlet 2.4 deployment descriptor
J2EE 1.4 XML schema, namespace is http://java.sun.com/xml/ns/j2ee
web.xml
<web-app xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"
version="2.4">
<display-name>Servlet 2.4 Web Application</display-name>
</web-app>
5. Servlet 2.3 deployment descriptor
J2EE 1.3 DTDs schema. This web.xml
file is too old, highly recommend you to upgrade it.
web.xml
<!DOCTYPE web-app PUBLIC
"-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd" >
<web-app>
<display-name>Servlet 2.3 Web Application</display-name>
</web-app>
Java Servlet important changes
Visit this Servlet wiki for the summary of important changes from Servlet 2.3 to 3.0
Visit this Servlet wiki for the summary of important changes from Servlet 2.3 to 3.0
Where is servlet 4 version and 4.0.1 ???
Servlet 4.0 deployment descriptor
<?xml version=”1.0″ encoding=”UTF-8″?>
<web-app xmlns:xsi=”http://www.w3.org/2001/XMLSchema-instance”
xmlns=”http://xmlns.jcp.org/xml/ns/javaee”
xsi:schemaLocation=”http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd”
id=”WebApp_ID” version=”4.0″>
</web-app>
Very useful infomation, thanks!
I am facing an issue with the deployment descriptor.
So far the url java.sun.com with version 3.1 was working on my servers.
But on the latest tomcat server that I ordered, this doesn’t work.
I had to change url to xmlns.jcp.org to for it to work.
Kindly help with pointers as to where I should check to fix this.
P.S. the old tomcat servers are still working with java.sun.com urls
Thanks!
Thanks, very nice tips
Thank you so much ..!!
You have one of the treasured site on the internet..!!
Dude, these are all wrong..
web-app is repeated for 2.4, 2.5 and 3.0
Thanks, just a note though, you’ve duplicated the web-app opening tags.
Thanks, article is updated.
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