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：
/**
* 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 %%%%%%%%%%%%%%%%%%%%%%%");
}
}
过滤器代码：
/**
* 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。
