WebMvcConfigurer配置類其實是Spring內部的一種配置方式，采用JavaBean的形式來代替傳統的xml配置文件形式進行針對框架個性化定制。基于java-based方式的spring mvc配置，需要創建一個配置類并實現WebMvcConfigurer 接口，WebMvcConfigurerAdapter 抽象類是對WebMvcConfigurer接口的簡單抽象（增加了一些默認實現），但在在SpringBoot2.0及Spring5.0中WebMvcConfigurerAdapter已被廢棄 。官方推薦直接實現WebMvcConfigurer或者直接繼承WebMvcConfigurationSupport，方式一實現WebMvcConfigurer接口（推薦），方式二繼承WebMvcConfigurationSupport類，具體實現可看這篇文章。https://www.jb51.net/article/174766.htm

//// Source code recreated from a .class file by IntelliJ IDEA// (powered by Fernflower decompiler)// package org.springframework.web.servlet.config.annotation; import java.util.List;import org.springframework.format.FormatterRegistry;import org.springframework.http.converter.HttpMessageConverter;import org.springframework.validation.MessageCodesResolver;import org.springframework.validation.Validator;import org.springframework.web.method.support.HandlerMethodArgumentResolver;import org.springframework.web.method.support.HandlerMethodReturnValueHandler;import org.springframework.web.servlet.HandlerExceptionResolver; public interface WebMvcConfigurer { void configurePathMatch(PathMatchConfigurer var1);  void configureContentNegotiation(ContentNegotiationConfigurer var1);  void configureAsyncSupport(AsyncSupportConfigurer var1);  void configureDefaultServletHandling(DefaultServletHandlerConfigurer var1);  void addFormatters(FormatterRegistry var1);  void addInterceptors(InterceptorRegistry var1);  void addResourceHandlers(ResourceHandlerRegistry var1);  void addCorsMappings(CorsRegistry var1);  void addViewControllers(ViewControllerRegistry var1);  void configureViewResolvers(ViewResolverRegistry var1);  void addArgumentResolvers(List<HandlerMethodArgumentResolver> var1);  void addReturnValueHandlers(List<HandlerMethodReturnValueHandler> var1);  void configureMessageConverters(List<HttpMessageConverter<?>> var1);  void extendMessageConverters(List<HttpMessageConverter<?>> var1);  void configureHandlerExceptionResolvers(List<HandlerExceptionResolver> var1);  void extendHandlerExceptionResolvers(List<HandlerExceptionResolver> var1);  Validator getValidator();  MessageCodesResolver getMessageCodesResolver();}

接下來我們著重找幾個方法講解一下：

 /* 攔截器配置 */void addInterceptors(InterceptorRegistry var1);/* 視圖跳轉控制器 */void addViewControllers(ViewControllerRegistry registry);/**  *靜態資源處理**/void addResourceHandlers(ResourceHandlerRegistry registry);/* 默認靜態資源處理器 */void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer);/**  * 這里配置視圖解析器 **/void configureViewResolvers(ViewResolverRegistry registry);/* 配置內容裁決的一些選項*/void configureContentNegotiation(ContentNegotiationConfigurer configurer);