拦截器举例--登录

login.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

 
   

    username:

    password:

    age:

    date:

   
   

 

 

struts.xml

    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
    ">

   
       
           
                     shengsiyuan
                    
           
       
       
       
           
           
       
       
        
       
            /usernameInvalid.jsp
            /passwordInvalid.jsp
            /error.jsp
       
       
           
           
       
       
            /result.jsp
            /login.jsp
       
       
           
            action2
            ${username}
            ${password}
            ${usernameAndPassword}
           
                   
           
           
            
             execute,myExecute
        
    
            
       
      
           /tokenSuccess.jsp
           tokenFail.jsp
    
    
      
      
       /action2.jsp
      
       
            /result.jsp
       
       
            /output.jsp
       
       
            /output.jsp
       
       
            /registerResult.jsp
            /register.jsp
       
   

 

 

LoginInterceptor.java

package com.shengsiyuan.interceptor;

import java.util.Map;

import com.opensymphony.xwork2.Action;
import com.opensymphony.xwork2.ActionInvocation;
import com.opensymphony.xwork2.interceptor.AbstractInterceptor;
import com.shengsiyuan.struts2.LoginAction;

public class LoginInterceptor extends AbstractInterceptor
{

    @Override
    @SuppressWarnings("unchecked")
    public String intercept(ActionInvocation invocation) throws Exception
    {
        if(LoginAction.class == invocation.getAction().getClass())
        {
            return invocation.invoke() ;
        }
        Map map = invocation.getInvocationContext().getSession() ;
        if(null == map.get("userInfo"))
        {
            return Action.LOGIN ;
        }
        return invocation.invoke() ;
    }

}

 

 

error.jsp

<%@ page language="java" import="java.util.*" pageEncoding="GBK"%>
 
 
    还没登录