Configuration of interceptors in struts2 framework

<?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE struts PUBLIC
	"-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
	"http://struts.apache.org/dtds/struts-2.3.dtd">
	
<struts>
		<package name="itcast" namespace="/" extends="struts-default">

			<!-- Configure the interceptor element under the package element-->
			<interceptors>
					<!-- Fill in your own interceptor name and full class name -->
					<interceptor name="MyInterceptor" class="action.MyInterceptor"></interceptor>
					<!-- Define an interceptor stack -->
					<interceptor-stack name="mystack">
					
							<interceptor-ref name="MyInterceptor">
										<param name="excludeMethods">add,delete</param>
										<!-- This param represents a method that does not intercept -->
							</interceptor-ref>	
							
							<!-- Note that the default interceptor stack of struts should be added, otherwise there will be no function of struts -->
							<interceptor-ref name="defaultStack">
										<param name="includeMethods">method name, method name</param>
										<!-- This param represents the method of interception, note that it cannot appear under an interceptor element at the same time as excludeMethods-->
							</interceptor-ref>
							
					</interceptor-stack>
					
			</interceptors>
			
			<!-- Finally configure the default interceptor stack of the package to access all actions under the package will go through the interceptor-->
			<default-interceptor-ref name="mystack"></default-interceptor-ref>
					
			<action name="PersonAction_*"  class="action.PersonAction" method="{1}">
					
					<result name="success" type="redirect">/index.jsp</result>
					<result name="ognl" type="redirect" >/index.jsp</result>
					<result name="find" type="dispatcher" >/listperson.jsp</result>
					<result name="findAllPerson" type="dispatcher" >/listperson.jsp</result>
			</action>
			
	</package>
									
</struts>