Spring interceptor拦截器配置及用法解析

  package com.bs.interceptor;

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

import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import com.bs.controller.BaseController;
import com.bs.entity.Member;

public class LoginInterceptor implements HandlerInterceptor {

	@Override
	public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
			throws Exception {
		
		Member member = BaseController.getMemberByCookie(request);
		System.out.println(member);
		if(member == null){
			response.sendRedirect("/officialweb/login.html"); 
		}
		return false;
	}

	@Override
	public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler,
			ModelAndView modelAndView) throws Exception {
		// TODO Auto-generated method stub

	}

	@Override
	public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex)
			throws Exception {
		// TODO Auto-generated method stub
	}
}

 <!-- 拦截器 --> 
 <!--     多个拦截器，顺序执行 -->
  <mvc:interceptors> 
     <mvc:interceptor> 
      <mvc:mapping path="/**"/>
      <mvc:exclude-mapping path="/**/cloud/**" />
      <mvc:exclude-mapping path="/**/login/**" />
      <bean class="com.bs.interceptor.LoginInterceptor"></bean> 
    </mvc:interceptor> 
  </mvc:interceptors>