struts2自定义Interceptor拦截器

 1 <%@ page language="java" contentType="text/html; charset=UTF-8"
 2     pageEncoding="UTF-8"%>
 3 <!DOCTYPE html>
 4 <html>
 5     <head>
 6         <meta charset="UTF-8">
 7         <title>struts2的一个例子</title>
 8     </head>
 9     <body>
10         <a href="${pageContext.request.contextPath }/hello">hello</a><br/>
11         
12     </body>
13 </html>

index.jsp代码

 1 package com.xiaostudy.web;
 2 
 3 import com.opensymphony.xwork2.ActionSupport;
 4 
 5 public class Hello extends ActionSupport {
 6     
 7     public String print() {
 8         System.out.println("Hello类的print方法执行了。。。。");
 9         return SUCCESS;
10     }
11 }

action动作类Hello.java代码

 1 package com.xiaostudy.web;
 2 
 3 import com.opensymphony.xwork2.ActionInvocation;
 4 import com.opensymphony.xwork2.interceptor.AbstractInterceptor;
 5 
 6 public class Demo1_Interceptor extends AbstractInterceptor {
 7 
 8     @Override
 9     public String intercept(ActionInvocation invocation) throws Exception {
10         System.out.println("Demo1_Interceptor调用之前>>>>>>>");
11         String str = invocation.invoke();//放行
12         System.out.println(str);
13         System.out.println("Demo1_Interceptor调用之后<<<<<<<<");
14         return str;
15     }
16 
17 }

自定义拦截器Demo1_Interceptor.java代码

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <!DOCTYPE struts PUBLIC
 3     "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
 4     "http://struts.apache.org/dtds/struts-2.3.dtd">
 5 <struts>
 6     <constant name="struts.devMode" value="true"/>
 7     
 8     <package name="hello" extends="struts-default">
 9         <interceptors><!-- 自定义拦截器声明 注意：name里面不能有下划线_ -->
10             <interceptor name="demo1Interptor" class="com.xiaostudy.web.Demo1_Interceptor"></interceptor>
11         </interceptors>
12         <action name="hello" class="com.xiaostudy.web.Hello" method="print">
13             <interceptor-ref name="demo1Interptor"></interceptor-ref><!-- 使用自定义拦截器 -->
14             <result name="success" >/ok.jsp</result>
15             <result name="input">/err.jsp</result>
16         </action>
17     </package>
18 </struts>

struts.xml代码

struts2自定义Interceptor拦截器

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