自定义拦截器

package com.zchen.interceptor;

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

public class MyInterceptor implements Interceptor {
	public void destroy() {
		// TODO Auto-generated method stub
		
	}
	public void init() {
		// TODO Auto-generated method stub
		
	}
	public String intercept(ActionInvocation invocation) throws Exception {
		long start = System.currentTimeMillis();
		String r = invocation.invoke();
		long end = System.currentTimeMillis();
		System.out.println("action time = " + (end - start));
		return r;
	}

}

 引用：

<?xml version="1.0" encoding="UTF-8" ?>

<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN"
    "http://struts.apache.org/dtds/struts-2.1.dtd">

<struts>
	<constant name="struts.devMode" value="true"></constant>
	<package name="test" namespace="/" extends="struts-default">
		<interceptors>
			<interceptor name="my" class="com.zchen.interceptor.MyInterceptor"></interceptor>
		</interceptors>
		<action name="test" class="com.zchen.action.TestAction">
			<result>/test.jsp</result>
			<interceptor-ref name="my"></interceptor-ref>
			<interceptor-ref name="defaultStack"></interceptor-ref>
		</action>
	</package>
</struts>