因为过滤器 Filter 是 servlet 相关的由 serviette 容器 tomcat 管理,而拦截器 Interceptor 是 spring 管理,因为 web 程序执行过程就是先启动 tomcat 容器,之后再在容器中调用 spring 那些东西,所以首先我猜测顺序是先走 Filter 过滤器 后进 Interceptor 拦截器
我通过程序进行测试来看区别,不说了,先上代码:
拦截器代码:
过滤器代码:
- /**
- * 拦截器校验参数
- * Created by wanghongsen on 16-3-31.
- */
- public class ControllerInterceptor implements HandlerInterceptor {
- private Logger logger = LoggerFactory.getLogger(ControllerInterceptor.class);
- @Override public boolean preHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o) throws Exception {
- logger.info("###################### before interceptor #######################");
- if (UntilService.checkParameter(httpServletRequest)) {
- logger.info("ControllerInterceptor-preHandle-parameter is regular");
- return true;
- } else {
- logger.info("ControllerInterceptor-preHandle-parameter is empty");
- httpServletResponse.sendRedirect("/flight.jsp");
- return false;
- }
- }
- @Override public void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, ModelAndView modelAndView) throws Exception {
- logger.info("%%%%%%%%%%%%%%%%%%%%%% after interceptor %%%%%%%%%%%%%%%%%%%%%%%");
- }
- @Override public void afterCompletion(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) throws Exception {
- logger.info("%%%%%%%%%%%%%%%%%%%%%% complete interceptor %%%%%%%%%%%%%%%%%%%%%%%");
- }
- }
- /**
- * 过滤器
- * Created by wanghongsen on 16-3-31.
- */
- public class TicketFilter implements Filter {
- private Logger logger = LoggerFactory.getLogger(TicketFilter.class);
- @Override public void init(FilterConfig filterConfig) throws ServletException {
- }
- @Override public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException,
- ServletException {
- logger.info("################### before do filter ######################");
- filterChain.doFilter(servletRequest, servletResponse);
- logger.info("%%%%%%%%%%%%%%%%%%% after do filter %%%%%%%%%%%%%%%%%%%%%");
- }
- @Override public void destroy() {
- }
- }
执行完之查看日志输出如下:
- 14:46:48.558 [http-bio-8080-exec-10] INFO c.q.fresh.base.filter.TicketFilter - ################### before do filter ######################
- 14:46:48.558 [http-bio-8080-exec-10] DEBUG o.s.web.servlet.DispatcherServlet - DispatcherServlet with name 'springMVCDispatcher' processing GET request for [/ticket/save]
- 14:46:48.558 [http-bio-8080-exec-10] DEBUG o.s.w.s.m.m.a.RequestMappingHandlerMapping - Looking up handler method for path /ticket/save
- 14:46:48.559 [http-bio-8080-exec-10] DEBUG o.s.w.s.m.m.a.RequestMappingHandlerMapping - Returning handler method [public java.lang.String com.qunar.fresh.ticket.controller.TicketController.save(javax.servlet.http.HttpServletRequest)]
- 14:46:48.559 [http-bio-8080-exec-10] DEBUG o.s.b.f.s.DefaultListableBeanFactory - Returning cached instance of singleton bean 'ticketController'
- 14:46:48.559 [http-bio-8080-exec-10] DEBUG o.s.web.servlet.DispatcherServlet - Last-Modified value for [/ticket/save] is: -1
- 14:46:48.559 [http-bio-8080-exec-10] INFO c.q.f.b.i.ControllerInterceptor - ###################### before interceptor #######################
- 14:46:48.559 [http-bio-8080-exec-10] INFO c.q.f.b.i.ControllerInterceptor - ControllerInterceptor-preHandle-parameter is regular
- 14:46:48.576 [http-bio-8080-exec-10] DEBUG org.mybatis.spring.SqlSessionUtils - Creating a new SqlSession
- 14:46:48.580 [http-bio-8080-exec-10] DEBUG org.mybatis.spring.SqlSessionUtils - SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@4f06dee3] was not registered for synchronization because synchronization is not active
- 14:46:48.587 [http-bio-8080-exec-10] DEBUG o.s.jdbc.datasource.DataSourceUtils - Fetching JDBC Connection from DataSource
- 14:46:48.594 [http-bio-8080-exec-10] DEBUG o.m.s.t.SpringManagedTransaction - JDBC Connection [com.alibaba.druid.proxy.jdbc.ConnectionProxyImpl@664a7d46] will not be managed by Spring
- 14:46:48.595 [http-bio-8080-exec-10] DEBUG c.q.f.ticket.dao.TicketDao.insert - ooo Using Connection [com.alibaba.druid.proxy.jdbc.ConnectionProxyImpl@664a7d46]
- 14:46:48.603 [http-bio-8080-exec-10] DEBUG c.q.f.ticket.dao.TicketDao.insert - ==> Preparing: INSERT INTO ticket_info( airline, flight_no, passenger_name, passenger_age, flight_date ) VALUES ( ?, ?, ?, ?, ? )
- 14:46:48.703 [http-bio-8080-exec-10] DEBUG c.q.f.ticket.dao.TicketDao.insert - ==> Parameters: 海南航空(String), 42s(String), 王红森(String), 333(Integer), 2016-03-01 19:48:19.0(Timestamp)
- 14:46:48.707 [http-bio-8080-exec-10] DEBUG c.q.f.ticket.dao.TicketDao.insert - <== Updates: 1
- 14:46:48.712 [http-bio-8080-exec-10] DEBUG c.a.druid.pool.PreparedStatementPool - {conn-10003, pstmt-20000} enter cache
- 14:46:48.713 [http-bio-8080-exec-10] DEBUG org.mybatis.spring.SqlSessionUtils - Closing non transactional SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@4f06dee3]
- 14:46:48.713 [http-bio-8080-exec-10] DEBUG o.s.jdbc.datasource.DataSourceUtils - Returning JDBC Connection to DataSource
- 14:46:48.713 [http-bio-8080-exec-10] INFO c.q.f.t.controller.TicketController - TicketController-save-order success!
- 14:46:48.715 [http-bio-8080-exec-10] INFO c.q.f.b.i.ControllerInterceptor - %%%%%%%%%%%%%%%%%%%%%% after interceptor %%%%%%%%%%%%%%%%%%%%%%%
- 14:46:48.715 [http-bio-8080-exec-10] DEBUG o.s.w.s.view.BeanNameViewResolver - No matching bean found for view name 'ticket/success'
- 14:46:48.717 [http-bio-8080-exec-10] DEBUG o.s.b.f.s.DefaultListableBeanFactory - Invoking afterPropertiesSet() on bean with name 'ticket/success'
- 14:46:48.717 [http-bio-8080-exec-10] DEBUG o.s.b.f.s.DefaultListableBeanFactory - Returning cached instance of singleton bean 'org.springframework.transaction.config.internalTransactionAdvisor'
- 14:46:48.717 [http-bio-8080-exec-10] DEBUG o.s.b.f.s.DefaultListableBeanFactory - Returning cached instance of singleton bean 'org.springframework.transaction.config.internalTransactionAdvisor'
- 14:46:48.718 [http-bio-8080-exec-10] DEBUG o.s.web.servlet.DispatcherServlet - Rendering view [org.springframework.web.servlet.view.InternalResourceView: name 'ticket/success'; URL [/WEB-INF/views/ticket/success.jsp]] in DispatcherServlet with name 'springMVCDispatcher'
- 14:46:48.719 [http-bio-8080-exec-10] DEBUG o.s.w.s.view.InternalResourceView - Forwarding to resource [/WEB-INF/views/ticket/success.jsp] in InternalResourceView 'ticket/success'
- 14:46:48.754 [http-bio-8080-exec-10] INFO c.q.f.b.i.ControllerInterceptor - %%%%%%%%%%%%%%%%%%%%%% complete interceptor %%%%%%%%%%%%%%%%%%%%%%%
- 14:46:48.754 [http-bio-8080-exec-10] DEBUG o.s.web.servlet.DispatcherServlet - Successfully completed request
- 14:46:48.754 [http-bio-8080-exec-10] INFO c.q.fresh.base.filter.TicketFilter - %%%%%%%%%%%%%%%%%%% after do filter %%%%%%%%%%%%%%%%%%%%%经过对日志分析,总结出拦截器和过滤器在执行结果上的先后顺序是
- Filterpre->service->dispatcher->preHandle->controller->postHandle->afterCompletion->FilterAfter
- 流程图如下:
- 过滤器和拦截器的区别:
- 1 拦截器是基于java的反射机制的,而过滤器是基于函数回调。
- 2 拦截器不依赖与servlet容器,过滤器依赖与servlet容器。
- 3 拦截器只能对action请求起作用,而过滤器则可以对几乎所有的请求起作用。
- 4 拦截器可以访问action上下文、值栈里的对象,而过滤器不能访问。
- 5 在action的生命周期中,拦截器可以多次被调用,而过滤器只能在容器初始化时被调用一次。
- 6 拦截器可以获取IOC容器中的各个bean,而过滤器就不行,这点很重要,在拦截器里注入一个service,可以调用业务逻辑。
来源: http://www.bubuko.com/infodetail-2436198.html