2018.12.17 struts.xml 配置自定义拦截器配置

自定义拦截器有三个步骤哦

<?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>
	<!--  配置常量 -->
	<constant name="struts.i18n.encoding" value="UTF-8"></constant>
	<constant name="struts.enable.DynamicMethodInvocation" value="true"></constant>
	<constant name="struts.devMode" value="true"></constant>

	<package name="test" namespace="/" extends="struts-default">

		<!-- 1.注册拦截器 -->
		<interceptors>
			<interceptor name="MyInterceptor3" class="com.legend.a_interceptor.MyInterceptor3"></interceptor>
			<!-- 2.注册拦截器栈 -->
			<interceptor-stack name="myStack">
				<!-- 自定义拦截器(建议放在20个拦截器之前) -->
				<interceptor-ref name="MyInterceptor3">
					<!-- 指定那些方法是不拦截的 -->
					<!--  <param name="excludeMethods">find,add</param>-->

					<!-- 指定那些方法需要拦截的 -->
					<param name="includeMethods">find,add</param>
				</interceptor-ref>

				<!-- 引用默认的拦截器栈（20个） -->
				<interceptor-ref name="defaultStack"></interceptor-ref>
			</interceptor-stack>
		</interceptors>

		 <!-- 3.指定默认拦截器栈 -->
		 <default-interceptor-ref name="myStack"></default-interceptor-ref>

		<global-exception-mappings>
			<exception-mapping result="error" exception="java.lang.RuntimeException"></exception-mapping>
		</global-exception-mappings>
		<!-- 配置Action -->
		<action name="Demo1Action_*" class="com.legend.a_interceptor.Demo1Action" method="{1}">
			<!-- 为Action单独走那个拦截器栈 -->
			<!--<interceptor-ref name="myStack"></interceptor-ref>-->
			<result name="success">/success.jsp</result>
			<result name="error">/error.jsp</result>
		</action>
	</package>

	<!-- struts2标签库 -->
	<package name="tag" namespace="/" extends="struts-default">
		<action name="Demo2Action" class="com.legend.b_tag.Demo2Action" method="execute">
			<result name="success">/tag1.jsp</result>
		</action>
	</package>

</struts>

MyInterceptor3.java

package com.legend.a_interceptor;

import com.opensymphony.xwork2.ActionInvocation;
import com.opensymphony.xwork2.interceptor.MethodFilterInterceptor;

/**
 * 拦截器第三种创建方法----继承MethodFilterInterceptor方法过滤拦截器 ，
 * 					定制哪些方法需要拦截，定制哪些方法不需要拦截
 * @author qichunlin
 *功能：定制拦截器拦截方法
 */
public class MyInterceptor3 extends MethodFilterInterceptor{
	private static final long serialVersionUID = 1L;

	@Override
	protected String doIntercept(ActionInvocation invocation) throws Exception {
		//前处理
		System.out.println("MyInterceptor3前处理");
		// 放行
		invocation.invoke();

		//后处理
		System.out.println("MyInterceptor3后处理");
		return "success";
	}

}