在springmvc中通过过滤器获取request和response

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搭建页面我就不详细的说了，只是简单的把要配置文件说一下

主要配置beans.xml文件和 spring-servlet.xml文件

beans.xml <bean id="timeBasedAccessInterceptor" class="zttc.itat.web.TestInterceptor">     </bean>     <bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping">        <property name="interceptors">             <list>                <ref bean="timeBasedAccessInterceptor"/>            </list>       </property>    </bean>

spring-servlet.xml **注意：配置中一定要去掉<mvc:annotation-driven />,去掉其默认配置，否则会实例化两个，自己写的那个TestInterceptor就不会拦截成功，获取的request和response为空**DefaultAnnotationHandlerMapping ，所以用下面这个就好了。    <context:component-scan base-package="zttc.itat.web"/>    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">        <property name="prefix" value="/WEB-INF/jsp/"/>        <property name="suffix" value=".jsp"/>    </bean>

TestInterceptor页面代码，这里是继承HandlerInterceptorAdapter，然后在里面preHandle要处理的代码，我这里是是把request和response的值保存起来

package zttc.itat.web;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;import zttc.itat.model.RequestResponseContext;public class TestInterceptor extends HandlerInterceptorAdapter {    @Override    public boolean preHandle(HttpServletRequest request,            HttpServletResponse response, Object handler) throws Exception {        // TODO Auto-generated method stub        RequestResponseContext.setResponse(response);        RequestResponseContext.setRequest(request);        return super.preHandle(request, response, handler);    }}

这里是RequestResponseContext.java里的代码，主要是为了线程安全写的来保存response和request

 package zttc.itat.model;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;public class RequestResponseContext {        private static ThreadLocal<HttpServletRequest> request_threadLocal = new ThreadLocal<HttpServletRequest>();        private static ThreadLocal<HttpServletResponse> reponse_threadLocal = new ThreadLocal<HttpServletResponse>();        public static void setRequest(HttpServletRequest request) {            request_threadLocal.set(request);        }        public static HttpServletRequest getRequest() {            return request_threadLocal.get();        }        public static void removeRequest() {            request_threadLocal.remove();        }        public static void setResponse(HttpServletResponse response)                  {            reponse_threadLocal.set(response);        }        public static HttpServletResponse getResponse() {            return reponse_threadLocal.get();        }        public static void removeResponse() {            reponse_threadLocal.remove();        }}

在其它页面就可以直接RequestResponseContext.getResponse()这样获取response了

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