struts2自定义拦截器

整个过程是：

    通过user.jsp登陆，就是在session中添加（user,name）使用的命令是：request.getSession().setAttribute("user", "du");然后登到MyDefInterceptor，则进入到hello.jsp，通过quit.jsp退出，即request.getSession().removeAttribute("user");

拦截器PermissionInterceptor的代码

 1 package cn.itcast.interceptor;
 2 
 3 import org.xml.sax.SAXException;
 4 
 5 import com.opensymphony.xwork2.ActionContext;
 6 import com.opensymphony.xwork2.ActionInvocation;
 7 import com.opensymphony.xwork2.interceptor.Interceptor;
 8 import com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallingContext.State;
 9 
10 //自定义的拦截器
11 
12 public class PermissionInterceptor implements Interceptor {
13 
14     @Override
15     public void destroy() {
16         // TODO Auto-generated method stub
17         
18     }
19 
20     @Override
21     public void init() {
22         // TODO Auto-generated method stub
23         
24     }
25 
26     @Override
27     public String intercept(ActionInvocation invocation) throws Exception {
28         Object user=ActionContext.getContext().getSession().get("user");
29         System.out.println(user);
30         if(user!=null) return invocation.invoke();//如果user不为null，代表用户已经登录
31         
32         ActionContext.getContext().put("message", "你没有该权限");
33         return "success";
34     }
35 
36 }

使用该拦截器的Action（MyDefInterceptorAction）代码：

package cn.itcast.action;
//使用自定义拦截器PermissionInterceptor的action
public class MyDefInterceptorAction {
    String message;
    
    public String getMessage() {
        return message;
    }

    public void setMessage(String message) {
        this.message = message;
    }

    public String execute(){
        this.message="execute";
        return "success";
    }
}

配置文件struts.xml

<?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 ="/test" extends="struts-default">

    <interceptors>
        <interceptor name="permission" class="cn.itcast.interceptor.PermissionInterceptor" />
        
        <interceptor-stack name="permissionstack">
            <interceptor-ref name="defaultStack"/>
            <interceptor-ref name="permission"/>
        </interceptor-stack>
    </interceptors>
    
      <global-results>
            <result name="success">/WEB-INF/page/hello.jsp</result>
    </global-results>

     <action name="MyDefInterceptor" class="cn.itcast.action.MyDefInterceptorAction" method="execute">
        <interceptor-ref name="permissionstack" />
    </action>
    
</package>

</struts>

登陆网页user.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
    request.getSession().setAttribute("user", "du");
%>
用户已登录

退出网页quit.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
  request.getSession().removeAttribute("user");
%>

退出
/WEB-INF/page/hello.jsp的代码为：
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">
    
    <title>My JSP 'hello.jsp' starting page</title>
    
    <meta http-equiv="pragma" content="no-cache">
    <meta http-equiv="cache-control" content="no-cache">
    <meta http-equiv="expires" content="0">    
    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
    <meta http-equiv="description" content="This is my page">
    <!--
    <link rel="stylesheet" type="text/css" href="styles.css">
    -->

  </head>
 
  <body>
  ${message}
  </body>
</html>

 

posted @ 2012-07-23 11:20  AndyDHG  阅读(198)  评论(0)  编辑  收藏  举报