SpringMVC拦截器（eclipse）

工程目录

index.jsp 配置文件

<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">       <servlet>     <servlet-name>springMVC</servlet-name>     <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>     <init-param>       <param-name>contextConfigLocation</param-name>       <param-value>classpath:springmvc.xml</param-value>     </init-param>   </servlet>   <servlet-mapping>     <servlet-name>springMVC</servlet-name>     <url-pattern>/</url-pattern>   </servlet-mapping>      <display-name>springmvc</display-name>   <welcome-file-list>     <welcome-file>index.html</welcome-file>     <welcome-file>index.htm</welcome-file>     <welcome-file>index.jsp</welcome-file>     <welcome-file>default.html</welcome-file>     <welcome-file>default.htm</welcome-file>     <welcome-file>default.jsp</welcome-file>   </welcome-file-list> </web-app>

springmvc.xml 配置文件

<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans"        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"        xmlns:context="http://www.springframework.org/schema/context"        xmlns:mvc="http://www.springframework.org/schema/mvc"        xsi:schemaLocation="         http://www.springframework.org/schema/beans         http://www.springframework.org/schema/beans/spring-beans-4.3.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         ">        <!-- 扫描注解包 -->        <context:component-scan base-package="com.springmvc.controller"></context:component-scan>        <!-- 允许访问静态资源 -->        <mvc:resources location="/js/" mapping="/js/*"></mvc:resources>        <!-- 创建适配器和映射器 -->        <mvc:annotation-driven></mvc:annotation-driven>        <!-- 4 逻辑视图，配置返回器的前后缀 -->        <!-- 把modelAndView对象的逻辑视图解析为物理视图 前缀+逻辑视图+后缀= 物理视图 -->        <bean               class="org.springframework.web.servlet.view.InternalResourceViewResolver">               <property name="suffix" value=".jsp"></property>               <property name="prefix" value="/"></property>        </bean>        <!-- 文件上传解析器 -->        <!-- <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"></bean> -->        <!-- 拦截器 -->        <mvc:interceptors>               <mvc:interceptor>               <!-- 配置拦截器地址 -->          <mvc:mapping path="/**"/>          <!-- 配置对应的拦截器 -->          <bean class="com.springmvc.intercepter.Intercepter"></bean>               </mvc:interceptor>        </mvc:interceptors> </beans>

Intercepter 拦截器

package com.springmvc.intercepter; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.springframework.web.servlet.HandlerInterceptor; import org.springframework.web.servlet.ModelAndView; public class Intercepter implements HandlerInterceptor  {          @Override          public void afterCompletion(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2, Exception arg3)                           throws Exception {                   // TODO Auto-generated method stub                   System.out.println("在控制器完视图返回后执行");          }          @Override          public void postHandle(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2, ModelAndView arg3)                           throws Exception {                   // TODO Auto-generated method stub                   System.out.println("在控制器完视图没有返回的时执行");          }          @Override          public boolean preHandle(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2) throws Exception {                   // TODO Auto-generated method stub                   System.out.println("在控制器前执行");                   return true;          } }

’执行的控制器

package com.springmvc.controller; import javax.servlet.http.HttpSession; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; @Controller public class controller {     @RequestMapping("/show")            public String  show(){               System.out.println("執行controller-------");              return null; } }

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