大纲 过滤器概述 Java EE 过滤器 API Java EE 过滤器编程和配置 过滤器的主要任务 本节习题 过滤器的基本功能 过滤器采用 AOP（Aspect Oriented Programming）编程思想， 使用拦截技术，在 HTTP 请求和响应达到目标之前，对请求和 响应的数据进行预处理。主要包括： ▶ 对 HTTP 请求作分析，对输入流进行预处理。 ▶ 阻止请求或响应的进行。

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.1.3. Programming Models. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . well-established in the async, non-blocking space. The other part of the answer is functional programming. Much as the addition of annotations in Java 5 created opportunities (such as annotated REST controllers popularized by CompletableFuture and ReactiveX) that allow declarative composition of asynchronous logic. At the programming-model level, Java 8 enabled Spring WebFlux to offer functional web endpoints alongside

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111 1.6. Asynchronous Requests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . removeOnly=true, in which case it removes but does not use the headers. In order to support asynchronous requests and error dispatches this filter should be mapped with DispatcherType.ASYNC and also W/"02a2d595e6ed9a0b24f027f2b63b134d6" (as defined in RFC 7232 Section 2.3). In order to support asynchronous requests this filter must be mapped with DispatcherType.ASYNC so that the filter can delay and

Internationalization using MessageSource Standard and Custom Events Annotation-based Event Listeners Asynchronous Listeners Ordering Listeners Generic Events Convenient access to low-level resources Convenient Collection Projection Expression templating Classes used in the examples 11. Aspect Oriented Programming with Spring Introduction AOP concepts Spring AOP capabilities and goals AOP Proxies @AspectJ transaction support model Global transactions Local transactions Spring Framework’s consistent programming model Understanding the Spring Framework transaction abstraction Synchronizing resources with