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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66 1.5. Functional Endpoints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . that are 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

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81 1.4. Functional Endpoints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . for more details. 1.3. Annotated Controllers WebFlux Spring MVC provides an annotation-based programming model where @Controller and @RestController components use annotations to express request mappings explained later in this chapter.  Guides and tutorials on spring.io use the annotation-based programming model described in this section. 1.3.1. Declaration WebFlux You can define controller beans

no value” semantics without paying the cost of wrappers, such as Optional. (Kotlin allows using functional constructs with nullable values. See this comprehensive guide to Kotlin null-safety.) Although Overflow response. 1.6. Bean Definition DSL Spring Framework supports registering beans in a functional way by using lambdas as an alternative to XML or Java configuration (@Configuration and @Bean) based on JavaConfig and does not yet provide specific support for functional bean definition, but you can experimentally use functional bean definitions through Spring Boot’s ApplicationContextInitializer