detects pre-refreshed WebApplicationContext (SPR-9996) * added support for placeholders in @RequestMapping annotation value (SPR-9935) * added support for specifying a message code as @ResponseStatus method in Spring MVC and RestTemplate (SPR-7985) * enabled smart suffix pattern matching in @RequestMapping methods (SPR-7632) * introduced "defaultcharset" property in StringHttpMessageConverter registrations in AbstractDispatcherServlet Initializer (SPR-9696) * improved no-match handling for @RequestMapping methods (SPR-9603) * added support for matrix variables (SPR-5499, SPR-7818) * added

fixed issue with setting Content-Length header depending on the charset of the response * fixed @RequestMapping header matching to correctly process negated header conditions * added getObjectMapper() accessor abstractions * added RedirectAttributes abstraction as supported method argument type of ## @RequestMapping methods * added "ignoreDefaultModelOnRedirect" flag to RequestMappingHandlerAdapter namespace via @EnableWebMvc annotation * introduce HandlerMethod abstraction selecting and invoking @RequestMapping methods * add HandlerMethod-based implementations of HandlerMapping, HandlerAdapter, Hand

默认的DispatcherServlet配置 DispatcherServlet的处理流程 控制器的实现 使用@Controller注解定义一个控制器 使用@RequestMapping注解映射请求路径 定义@RequestMapping注解的处理方法 异步请求的处理 对控制器测试 处理器映射 使用HandlerInterceptor拦截请求 视图解析 使用ViewResolver接口解析视图 视图链 来设计的，这个 Servlet会把请求分发给各个处理器，并支持可配置的处理器映射、视图渲染、本地化、时区与主题渲染等，甚至还能支持文件上传。处理器是你的应用中注解了 @Controller 和 @RequestMapping 的类和方法，Spring为处理器方法提供了极其多样灵活的配置。Spring 3.0以后提供了 @Controller 注解机制、 @PathVariable 注解以及一些其他的特性，你可以使用它们来进行 图渲染出页面最终呈现给用户。 Spring对控制器的定义非常宽松，这意味着你在实现控制器时非常自由。 Spring 2.5以后引入了基于注解的编程模型，你可以在你的控制器实现上添 加 @RequestMapping 、 @RequestParam 、 @ModelAttribute 等注解。注解特性既支持基于 Servlet的MVC，也可支持基于Portlet的MVC。通过此种方式实现的控制器既无

The two main HandlerMapping implementations are RequestMappingHandlerMapping (which supports @RequestMapping annotated methods) and SimpleUrlHandlerMapping (which maintains explicit registrations of URI as the following example shows: Java @RestController public class ErrorController { @RequestMapping(path = "/error") public Map handle(HttpServletRequest request) message")); return map; } } Kotlin @RestController class ErrorController { @RequestMapping(path = ["/error》） fun handle(request: HttpServletRequest): Map {

Method Arguments 34 Return Values 36 Type Conversion 37 Matrix Variables 37 @RequestMapping 40 @RequestMapping 42 @CookieValue 43 @ModelAttribute 44 @SessionAttributes 47 @SessionAttribute mappings, and others.The main HandlerMapping implementations are RequestMappingHandlerMapping for @RequestMapping annotated methods, RouterFunctionMapping for functional endpoint routes, and SimpleUrlHandlerMapping view resolution and rendering with an HTML template. ##### 1.4.2. Request Mapping Web MVC The @RequestMapping annotation is used to map requests to controllers methods. It has various attributes to match

使用基于注解的控制器的几个优点 1. Controller 和 RequestMapping 注释类型是 Spring MVC API 最重要的两个注释类型。 2. 一个控制器类可以处理多个动作（而一个实现了 Controller 接口的控制器只能处理一个动作）。 3. 基于注解的控制器的请求映射不需要存储在配置文件中。使用 RequestMapping 注释类型，可以对一个方法进行请求处理。 ## Controller ## RequestMapping 注解类型 ####### org.springframework.web.bind.annotation.RequestMapping 在控制类的内部为每一个动作开发相应的处理方法，要让 Spring 知道用哪一种方法来处理它的动作，需要使用该注解类型映射 URI 与方法。 采用 @RequestMapping 注解的方法将成为请求处理方法，并由调度程序在接收到对应 对应 URL 请求时调用。 ## @RequestMapping 示例 package com.example.controller; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; @Controller public

Mapping Requests With @RequestMapping ..... 490 Composed @RequestMapping Variants ..... 491 @Controller and AOP Proxying ..... 492 New Support Classes for @RequestMapping methods in Spring MVC 3 Request Parameters and Header Values ..... 499 HTTP HEAD and HTTP OPTIONS ..... 499 Defining @RequestMapping handler methods ..... 500 Supported method argument types ..... 500 Supported method return support ..... 621 Defining a controller with @Controller ..... 622 Mapping requests with @RequestMapping ..... 622 Supported handler method arguments ..... 624 Binding request parameters to method

Mapping Requests With @RequestMapping ..... 483 Composed @RequestMapping Variants ..... 484 @Controller and AOP Proxying ..... 485 New Support Classes for @RequestMapping methods in Spring MVC 3 Request Parameters and Header Values ..... 492 HTTP HEAD and HTTP OPTIONS ..... 492 Defining @RequestMapping handler methods ..... 493 Supported method argument types ..... 493 Supported method return support ..... 614 Defining a controller with @Controller ..... 615 Mapping requests with @RequestMapping ..... 615 Supported handler method arguments ..... 617 Binding request parameters to method

@Controller Mapping Requests With @RequestMapping Composed @RequestMapping Variants @Controller and AOP Proxying New Support Classes for @RequestMapping methods in Spring MVC 3.1 URI Template Producible Media Types Request Parameters and Header Values HTTP HEAD and HTTP OPTIONS Defining @RequestMapping handler methods Supported method argument types Supported method return types Binding request with @Controller Mapping requests with @RequestMapping Supported handler method arguments Binding request parameters to method parameters with @RequestMapping Providing a link to data from the model

Mapping Requests With @RequestMapping Composed @RequestMapping Variants @Controller and AOP Proxying New Support Classes for @RequestMapping methods in Spring Media Types Request Parameters and Header Values HTTP HEAD and HTTP OPTIONS Defining @RequestMapping handler methods Supported method argument types Supported method return types Binding dispatcher for annotation support Defining a controller with @Controller Mapping requests with @RequestMapping Supported handler method arguments Binding request parameters to method parameters with @RequestParam