層次關係

攔截器實現HandlerInterceptor介面

package com.bybo.aca.web.interceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

public class
 
 Login implements HandlerInterceptor {

    @Override
    public void afterCompletion(HttpServletRequest httpRequest,
            HttpServletResponse httpResponse, Object arg2, Exception arg3)
            throws Exception {
         
    }

    @Override
    public void postHandle(HttpServletRequest arg0,
 
 HttpServletResponse arg1,
            Object arg2, ModelAndView arg3) throws Exception {
        

    }

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response,
            Object object) throws Exception {
        /*HttpServletRequest httpRequest = (HttpServletRequest) request;  
         HttpServletResponse httpResponse = (HttpServletResponse) response;*/
 

        String urlString = request.getRequestURI();
            
        ///olForum/forumList.html模擬登入頁
        if(urlString.endsWith("forumList.html")){
            return true;
        }
        //請求的路徑
        String contextPath=request.getContextPath();
       
        /*httpRequest.getRequestDispatcher("/olForum/forumList").forward(httpRequest, httpResponse);*/
        /*response.sendRedirect(contextPath+"/olForum/forumList.html");*/
        response.sendRedirect(contextPath + "/olForum/forumList.html?login=aaa");  
        return false;
        /*httpResponse.sendRedirect(httpRequest.getContextPath()+"/olForum/forumList.html");
        return;*/
        

    }

}

spring.xml

<mvc:interceptors>  
   <!--  使用bean定義一個Interceptor，直接定義在mvc:interceptors根下面的Interceptor將攔截所有的請求   -->
    <!-- <bean class="com.bybo.aca.web.interceptor.Login"/> -->   
    <mvc:interceptor>  
        <!-- 進行攔截：/**表示攔截所有controller -->
        <mvc:mapping path="/**" />
    　　 <!-- 不進行攔截 -->
        <mvc:exclude-mapping path="/index.html"/>
     
        <bean class="com.bybo.aca.web.interceptor.Login"/>  
    </mvc:interceptor>  
</mvc:interceptors>