自定义登录拦截器

package com.cvicse.interceptor;

import javax.servlet.http.HttpServletResponse;

import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionContext;

import com.opensymphony.xwork2.ActionInvocation;

import com.opensymphony.xwork2.interceptor.AbstractInterceptor;

public class AuthrityInterceptor extends AbstractInterceptor {

private static final long serialVersionUID = 4297635740201526003L;

@Override

public String intercept(ActionInvocation invocation) throws Exception {

System.out.println("hello");

ActionContext ctx = invocation.getInvocationContext();

String user = (String)ctx.getSession().get("user");

System.out.println(user);

if(user != null){

return invocation.invoke();

}

HttpServletResponse response = ServletActionContext.getResponse();

String rootPath = ServletActionContext.getRequest().getContextPath();

response.sendRedirect(rootPath + "/login.jsp");

return null;

}

}

<?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="user" extends="struts-default">

<interceptors>

<interceptor name="authrity" class="com.cvicse.interceptor.AuthrityInterceptor" >

<param name="login">/login.jsp</param>

</interceptor>

<interceptor-stack name="authrityStack">

<interceptor-ref name="defaultStack" />

<interceptor-ref name="authrity" />

</interceptor-stack>

</interceptors>

<!-- <default-interceptor-ref name="authrityStack" />  -->

<global-results>

<result name="success">/success.jsp</result>

</global-results>

<action name="regist" class="com.cvicse.action.RegistAction">

</action>

<action name="login" class="com.cvicse.action.LoginAction">

<interceptor-ref name="authrityStack" />

</action>

</package>

</struts>