Spring Boot 自動配置好了SpringMVC 以下是SpringBoot對SpringMVC的默認配置:**==（WebMvcAutoConfiguration）==** - Inclusion of `ContentNegotiatingViewResolver` and `BeanNameViewResolver` beans. - 自動配置了ViewResolver（視圖解析器：根據方法的返回值得到視圖對象（View），視圖對象決定如何渲染（轉發？重定向？）） - ContentNegotiatingViewResolver：組合所有的視圖解析器的； - ==如何定制：我們可以自己給容器中添加一個視圖解析器；自動的將其組合進來；== - Support for serving static resources, including support for WebJars (see below).靜態資源文件夾路徑,webjars - Static `index.html` support. 靜態首頁訪問 - Custom `Favicon` support (see below). favicon.ico ? - 自動注冊了 of `Converter`, `GenericConverter`, `Formatter` beans. - Converter：轉換器； public String hello(User user)：類型轉換使用Converter - `Formatter` 格式化器； 2017.12.17===Date； ```java @Bean @ConditionalOnProperty(prefix = "spring.mvc", name = "date-format")//在文件中配置日期格式化的規則 public Formatter<Date> dateFormatter() { return new DateFormatter(this.mvcProperties.getDateFormat());//日期格式化組件 } ``` ? ==自己添加的格式化器轉換器，我們只需要放在容器中即可== - Support for `HttpMessageConverters` (see below). - HttpMessageConverter：SpringMVC用來轉換Http請求和響應的；User---Json； - `HttpMessageConverters` 是從容器中確定；獲取所有的HttpMessageConverter； ==自己給容器中添加HttpMessageConverter，只需要將自己的組件注冊容器中（@Bean,@Component）== ? - Automatic registration of `MessageCodesResolver` (see below).定義錯誤代碼生成規則 - Automatic use of a `ConfigurableWebBindingInitializer` bean (see below). ==我們可以配置一個ConfigurableWebBindingInitializer來替換默認的；（添加到容器）== ``` 初始化WebDataBinder； 請求數據=====JavaBean； ``` **org.springframework.boot.autoconfigure.web：web的所有自動場景；** If you want to keep Spring Boot MVC features, and you just want to add additional [MVC configuration](https://docs.spring.io/spring/docs/4.3.14.RELEASE/spring-framework-reference/htmlsingle#mvc) (interceptors, formatters, view controllers etc.) you can add your own `@Configuration` class of type `WebMvcConfigurerAdapter`, but **without** `@EnableWebMvc`. If you wish to provide custom instances of `RequestMappingHandlerMapping`, `RequestMappingHandlerAdapter` or `ExceptionHandlerExceptionResolver` you can declare a `WebMvcRegistrationsAdapter` instance providing such components. If you want to take complete control of Spring MVC, you can add your own `@Configuration` annotated with `@EnableWebMvc`.