Interceptor

<action name="hello" class="org.apache.struts.helloworld.action.HelloWorldAction" method="execute">       <result name="success">/HelloWorld.jsp</result>       <interceptor-ref name="exception"/>       <interceptor-ref name="alias"/>       <interceptor-ref name="params"/>       <interceptor-ref name="servletConfig"/>       <interceptor-ref name="prepare"/>       <interceptor-ref name="i18n"/>       <interceptor-ref name="chain"/>       <interceptor-ref name="modelDriven"/>       <interceptor-ref name="fileUpload"/>       <interceptor-ref name="staticParams"/>       <interceptor-ref name="params"/>       <interceptor-ref name="conversionError"/>       <interceptor-ref name="validation">       <param name="excludeMethods">myValidationExcudeMethod</param>       </interceptor-ref>       <interceptor-ref name="workflow">       <param name="excludeMethods">myWorkflowExcludeMethod</param>       </interceptor-ref>   </action>   

Method 2:

 <action name="myAction" class="myActionClass">     <interceptor-ref name="defaultStack">       <param name="validation.excludeMethods">myValidationExcludeMethod</param>       <param name="workflow.excludeMethods">myWorkflowExcludeMethod</param>     </interceptor-ref>   </action>
In the first method, the whole default stack is copied and the parameter then changed accordingly.
  
In the second method, the 'interceptor-ref' refer to an existing interceptor-stack, namely defaultStack in this example, and override the validator and workflow interceptor excludeMethods typically in this case. Note that in the 'param' tag, the name attribute contains a dot (.) the word before the dot(.) specifies the interceptor name whose parameter is to be overridden and the word after the dot (.) specifies the parameter itself