struts.xml

<constant name="struts.objectFactory" value="org.apache.struts2.spring.StrutsSpringObjectFactory" />

<package name="pack1" extends="struts-default">
        <result-types>
            <result-type name="tiles" class="org.apache.struts2.views.tiles.TilesResult" />
        </result-types>

        <action name="TestAction" class="it.mobimentum.testapp.action.TestAction">
            <result name="success" type="tiles">dashboard</result>
        </action>
</package>