spring mvc 拦截器配置

<?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:tx="http://www.springframework.org/schema/tx"
	xmlns:context="http://www.springframework.org/schema/context"
	xmlns:aop="http://www.springframework.org/schema/aop"
	xmlns:mvc="http://www.springframework.org/schema/mvc"
	xsi:schemaLocation="
       http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
       http://www.springframework.org/schema/context
       http://www.springframework.org/schema/context/spring-context-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-2.5.xsd"
	   >
	
	
	<mvc:interceptors>  
       <mvc:interceptor>  
           <mvc:mapping path="/**"/>  
           <bean class="com.xx.space.backstage.interceptor.CommonInterceptor" />  
       </mvc:interceptor>  
   	</mvc:interceptors> 
	
</beans>

 package com.xx.space.backstage.interceptor;

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

import org.apache.log4j.Logger;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;
import org.springframework.web.servlet.handler.SimpleUrlHandlerMapping;
import org.springframework.web.servlet.mvc.support.ControllerClassNameHandlerMapping;

/**
 * <p class="detail">
 * 这里写描述
 * </p>
 * 
 * @ClassName: CommonInterceptor
 * @version V1.0 @date 2012-4-6 下午01:20:01
 * @author <a href="mailto:[email protected] ">罗伟俊</a>
 * 
 */
public class CommonInterceptor extends HandlerInterceptorAdapter {
	private Logger log = Logger.getLogger(CommonInterceptor.class);

	public CommonInterceptor() {}

	/**
	 * 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 {
		System.out.println("CommonInterceptor拦截器: preHandle");
		return true;
	}

	// 在业务处理器处理请求执行完成后,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 {
		System.out.println("CommonInterceptor拦截器: postHandle");
		SimpleUrlHandlerMapping dd;
		ControllerClassNameHandlerMapping ee;
	}

	/**
	 * 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 {
		System.out.println("CommonInterceptor拦截器: afterCompletion");
	}
	
	
}