core/src/main/resources/struts-portlet-default.xml

<?xml version="1.0" encoding="UTF-8" ?>

<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
    "http://struts.apache.org/dtds/struts-2.0.dtd">
    
<struts>
    <package name="struts-portlet-default" extends="struts-default">

	   <result-types>
			<result-type name="dispatcher" class="org.apache.struts2.portlet.result.PortletResult" default="true"/>
			<result-type name="freemarker" class="org.apache.struts2.views.freemarker.PortletFreemarkerResult"/>
			<result-type name="velocity" class="org.apache.struts2.portlet.result.PortletVelocityResult"/>
	   </result-types>
       
       <interceptors>
        <interceptor name="portlet-preferences" class="org.apache.struts2.portlet.interceptor.PortletPreferencesInterceptor"/>
        <interceptor-stack name="portletDefaultStack">
            <interceptor-ref name="defaultStack"/>
            <interceptor-ref name="portlet-preferences" />
        </interceptor-stack>
        
       </interceptors>
       
       <default-interceptor-ref name="portletDefaultStack"/>
       
	   <action name="renderDirect" class="org.apache.struts2.portlet.dispatcher.DirectRenderFromEventAction">
	   		<result name="success">${location}</result>
	   </action>
	   <action name="freemarkerDirect" class="org.apache.struts2.portlet.dispatcher.DirectRenderFromEventAction">
	   		<result type="freemarker" name="success">${location}</result>
	   </action>
	   <action name="velocityDirect" class="org.apache.struts2.portlet.dispatcher.DirectRenderFromEventAction">
	   		<result type="velocity" name="success">${location}</result>
	   </action>
	</package>
</struts>