```java @ConfigurationProperties(prefix = "spring.resources", ignoreUnknownFields = false) public class ResourceProperties implements ResourceLoaderAware { //可以设置和静态资源有关的参数，缓存时间等 ``` ```java WebMvcAuotConfiguration： @Override public void addResourceHandlers(ResourceHandlerRegistry registry) { if (!this.resourceProperties.isAddMappings()) { logger.debug("Default resource handling disabled"); return; } Integer cachePeriod = this.resourceProperties.getCachePeriod(); if (!registry.hasMappingForPattern("/webjars/**")) { customizeResourceHandlerRegistration( registry.addResourceHandler("/webjars/**") .addResourceLocations( "classpath:/META-INF/resources/webjars/") .setCachePeriod(cachePeriod)); } String staticPathPattern = this.mvcProperties.getStaticPathPattern(); //静态资源文件夹映射 if (!registry.hasMappingForPattern(staticPathPattern)) { customizeResourceHandlerRegistration( registry.addResourceHandler(staticPathPattern) .addResourceLocations( this.resourceProperties.getStaticLocations()) .setCachePeriod(cachePeriod)); } } //配置欢迎页映射 @Bean public WelcomePageHandlerMapping welcomePageHandlerMapping( ResourceProperties resourceProperties) { return new WelcomePageHandlerMapping(resourceProperties.getWelcomePage(), this.mvcProperties.getStaticPathPattern()); } //配置喜欢的图标 @Configuration @ConditionalOnProperty(value = "spring.mvc.favicon.enabled", matchIfMissing = true) public static class FaviconConfiguration { private final ResourceProperties resourceProperties; public FaviconConfiguration(ResourceProperties resourceProperties) { this.resourceProperties = resourceProperties; } @Bean public SimpleUrlHandlerMapping faviconHandlerMapping() { SimpleUrlHandlerMapping mapping = new SimpleUrlHandlerMapping(); mapping.setOrder(Ordered.HIGHEST_PRECEDENCE + 1); //所有 **/favicon.ico mapping.setUrlMap(Collections.singletonMap("**/favicon.ico", faviconRequestHandler())); return mapping; } @Bean public ResourceHttpRequestHandler faviconRequestHandler() { ResourceHttpRequestHandler requestHandler = new ResourceHttpRequestHandler(); requestHandler .setLocations(this.resourceProperties.getFaviconLocations()); return requestHandler; } } ``` ==1）、所有 /webjars/** ，都去 classpath:/META-INF/resources/webjars/ 找资源；== ​ webjars：以jar包的方式引入静态资源； http://www.webjars.org/  localhost:8080/webjars/jquery/3.3.1/jquery.js ```xml <!--引入jquery-webjar-->在访问的时候只需要写webjars下面资源的名称即可 <dependency> <groupId>org.webjars</groupId> <artifactId>jquery</artifactId> <version>3.3.1</version> </dependency> ``` ==2）、"/**" 访问当前项目的任何资源，都去（静态资源的文件夹）找映射== ``` "classpath:/META-INF/resources/", "classpath:/resources/", "classpath:/static/", "classpath:/public/" "/"：当前项目的根路径 ``` localhost:8080/abc === 去静态资源文件夹里面找abc ==3）、欢迎页； 静态资源文件夹下的所有index.html页面；被"/**"映射；== ​ localhost:8080/ 找index页面 ==4）、所有的 **/favicon.ico 都是在静态资源文件下找；==