文章摘抄至 http://exceptioneye.iteye.com/blog/1303842
一、拦截器的配置
1、传统的配置
<bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping" > <property name="interceptors"> <!-- 多个拦截器,顺序执行 --> <list> <ref bean="commonInterceptor"/> </list> </property> </bean> <!-- 如果不定义mappingURL,则默认拦截所有对Controller的请求 ; 可以使用正则表达式对url进行匹配,从而更细粒度的进行拦截(.*/entryOrJsonController\.do\?action=reg.*); --> <bean id="commonInterceptor" class="com.wy.interceptor.CommonInterceptor"> <property name="mappingURL" value=".*/entryOrJsonController\.do\?action=reg.*"/> </bean>
2、基于注解的配置
<?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:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:jdbc="http://www.springframework.org/schema/jdbc" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p" xsi:schemaLocation=" http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-3.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd"> <!-- 国际化 --> <bean id="messageSource" class="org.springframework.context.support.ResourceBundleMessageSource"> <property name="basename" value="message" /> </bean> <bean id="localeResolver" class="org.springframework.web.servlet.i18n.CookieLocaleResolver" /> <!--Spring3.1开始的注解 HandlerMapping --> <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping" /> <!--Spring3.1开始的注解 HandlerAdapter --> <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter"> <!--线程安全的访问session --> <property name="synchronizeOnSession" value="true" /> </bean> <!-- ViewResolver 视图解析类 --> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="viewClass" value="org.springframework.web.servlet.view.JstlView" /> <property name="prefix" value="/WEB-INF/jsp/" /> <property name="suffix" value=".jsp" /> </bean> <!-- 数据源 --> <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"> <property name="driverClassName"> <value>com.mysql.jdbc.Driver</value> </property> <property name="url"> <!-- <value>jdbc:mysql://127.0.0.1:3306/myspring</value> --> <value>jdbc:mysql://172.16.14.81:3306/myspring</value> </property> <property name="username"> <value>root</value> </property> <property name="password"> <value>admin</value> </property> </bean> <!-- 指明操作数据库的配置文件位置 --> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource"></property> <property name="configLocation" value="classpath:../config/mybatis/MyBatis-Configuration.xml"></property> </bean> <!-- 使用事物处理 --> <bean id="tm" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource"></property> </bean> <tx:annotation-driven transaction-manager="tm" /> <!-- 拦截器 --> <mvc:interceptors> <!-- 多个拦截器,顺序执行 --> <mvc:interceptor> <mvc:mapping path="/user/*" /> <!-- 如果不配置或/*,将拦截所有的Controller --> <bean class="adtec.userManager.controller.MyInterceptor"></bean> </mvc:interceptor> </mvc:interceptors> </beans>
二、拦截器类
package com.wy.interceptor; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.log4j.Logger; import org.springframework.web.servlet.HandlerInterceptor; import org.springframework.web.servlet.ModelAndView; public class CommonInterceptor implements HandlerInterceptor { private Logger log = Logger.getLogger(CommonInterceptor.class); public CommonInterceptor() { // TODO Auto-generated constructor stub } private String mappingURL;//利用正则映射到需要拦截的路径 public void setMappingURL(String mappingURL) { this.mappingURL = mappingURL; } /** * 在业务处理器处理请求之前被调用 * 如果返回false * 从当前的拦截器往回执行所有拦截器的afterCompletion(),再退出拦截器链 * * 如果返回true * 执行下一个拦截器,直到所有的拦截器都执行完毕 * 再执行被拦截的Controller * 然后进入拦截器链, * 从最后一个拦截器往回执行所有的postHandle() * 接着再从最后一个拦截器往回执行所有的afterCompletion() */ @Override public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception { // TODO Auto-generated method stub log.info("==============执行顺序: 1、preHandle================"); String url=request.getRequestURL().toString(); if(mappingURL==null || url.matches(mappingURL)){ request.getRequestDispatcher("/msg.jsp").forward(request, response); return false; } return true; } //在业务处理器处理请求执行完成后(执行完controller对应的方法之后),生成视图之前执行的动作 @Override public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception { // TODO Auto-generated method stub log.info("==============执行顺序: 2、postHandle================"); } /** * 在DispatcherServlet完全处理完请求后被调用 * * 当有拦截器抛出异常时,会从当前拦截器往回执行所有的拦截器的afterCompletion() */ @Override public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception { // TODO Auto-generated method stub log.info("==============执行顺序: 3、afterCompletion================"); } }