springmvc拦截器的配置、使用
springmvc拦截器的配置、使用:
1.自定义拦截器,实现HandlerInterceptor接口。
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模拟登录页 if(urlString.endsWith("forumList.html")){ return true; } //请求的路径 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;*/ } }
2:springmvc配置文件中配置:
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p" xsi:schemaLocation="http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd"> <!-- 扫描controller(controller层注入) --> <context:component-scan base-package="com.bybo.aca.web.controller"/> <mvc:interceptors> <!-- 使用bean定义一个Interceptor,直接定义在mvc:interceptors根下面的Interceptor将拦截所有的请求 --> <!-- <bean class="com.bybo.aca.web.interceptor.Login"/> --> <mvc:interceptor> <!-- 进行拦截:/**表示拦截所有controller --> <mvc:mapping path="/**" />
<!-- 不进行拦截 --> <mvc:exclude-mapping path="/index.html"/> <bean class="com.bybo.aca.web.interceptor.Login"/> </mvc:interceptor> </mvc:interceptors>
<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver" p:prefix="/WEB-INF/views/" p:suffix=".jsp"/> </beans>