jakarta ee - Can you render a file without a .jsp extension as a JSP?

Question

Is it possible to tell a standard Java EE servlet container to interpret and render a file as a JSP even if it doesn't have a .jsp extension?

Say I have a file called foo.xyz in the root directory of my WAR. This file contains some jstl logic as you would expect in a .jsp file. If I request http://myserver/myapp/foo.xyz I'm going to see the literal code from that file rendered as text. Is there a way to configure the web app such that it renders the file using the JSP interpreter without changing the files extension?

Please don't ask why I'd want to do this. The constraints are complicated.

Answer 1

You can add the following configuration in your web.xml to make files ending with .xyz beeing processed as JSP:

<jsp-config>
    <jsp-property-group>
        <url-pattern>*.xyz</url-pattern>
    </jsp-property-group>
</jsp-config>

This solution is working with Tomcat and Websphere. And probably with any JEE compliant server container.