1.Add the next servlet-mapping to the web.xml file:
<servlet>
<servlet-name>struts2servlet</servlet-name>
<servlet-class>org.apache.struts2.dispatcher.ng.servlet.StrutsServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>struts2servlet</servlet-name>
<url-pattern>*.action</url-pattern>
</servlet-mapping>
<servlet>
<servlet-name>struts2Resources</servlet-name>
<servlet-class>org.apache.struts2.dispatcher.ng.servlet.StrutsServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>struts2Resources</servlet-name>
<url-pattern>/struts/*</url-pattern>
</servlet-mapping>
This could be done by a filter-mapping too, but with filter-mapping we can have some problems in a Websphere server.
2.Define some pakage in the struts2 config to manage the ajax request
<package name="ajax" extends="json-default" namespace="/ajax"> ... </package>
3.To make a valid ajax request from the portlet, all the request must be as the next examples:
<form id="compraVentaForm" action='<s:url value="/ajax/compraVentaSave.action"/>' method="post">
...
</form>
<s:url id="ordenesActivasResultado" value="/ajax/ordenesActivas.action"/>
<sj:div href="%{ordenesActivasResultado}" indicator="indicator" onCompleteTopics="completeDiv" reloadTopics="reloadDiv">
<img id="loading" src="<s:url value='/img/ajax-loader.gif'/>" alt="Loading..."/>
</sj:div>
