拦截器（interceptor），类似servlet中的过滤器。 [Spring 3 MVC Interceptor tutorial with example](http://viralpatel.net/blogs/spring-mvc-interceptor-example/) [Spring MVC Interceptors Example – HandlerInterceptor and HandlerInterceptorAdapter](http://www.journaldev.com/2676/spring-mvc-interceptors-example-handlerinterceptor-and-handlerinterceptoradapter) [Spring MVC handler interceptors example](http://www.mkyong.com/spring-mvc/spring-mvc-handler-interceptors-example/) [Spring MVC Handler Interceptor](http://javapapers.com/spring/spring-mvc-handler-interceptor/) 暂不支持注解。[Is it possible to wire a Spring MVC Interceptor using annotations?](http://stackoverflow.com/questions/4389224/is-it-possible-to-wire-a-spring-mvc-interceptor-using-annotations)