For WebApplicationContexts, additional MIME type mappings can be added in the web.xml file:
<mime-mapping>
<extension>wml</extension>
<mime-type>text/vnd.wap.wml</mime-type>
</mime-mapping>
To configure the MIME mapping from a jetty.xml file:
<Call name="addContext">
...
<Call name="setMimeMapping >
<Arg>ext</Arg>
<Arg>your/type</Arg>
</Call>
...