SpringBoot对静态资源的映射规则

@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

 

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/

==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；==