interceptors/src/main/resources/struts.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
		"-//Apache Software Foundation//DTD Struts Configuration 2.5//EN"
		"https://struts.apache.org/dtds/struts-2.5.dtd">

<struts>

	<constant name="struts.devMode" value="true" />

	<package name="basicstruts2" extends="struts-default" >

        <!-- If no class attribute is specified the framework will assume success and
        render the result index.jsp -->
        <!-- If no name value for the result node is specified the success value is the default -->
		<action name="index">
			<result>/index.jsp</result>
		</action>

	<action name="register_input" 	class="org.apache.struts.register.action.Register" method="input">
		<result name="input">register.jsp</result>
	  </action>

      <!-- for timer interceptor see https://struts.apache.org/core-developers/timer-interceptor.html -->
	  <action name="register" class="org.apache.struts.register.action.Register" method="execute">
			<interceptor-ref name="logger" />
			<interceptor-ref name="defaultStack">
			   <param name="exception.logEnabled">true</param>
			   <param name="exception.logLevel">ERROR</param>
			</interceptor-ref>
		<result name="success">thankyou.jsp</result>
		<result name="input">register.jsp</result>
	  </action>

	</package>

</struts>