SpringBoot对静态资源的映射规则详解解读
作者:夜聆离殇
这篇文章主要介绍了SpringBoot对静态资源的映射规则详解解读,在Spring Boot中,映射规则是用来定义URL与控制器方法之间的映射关系的,通过映射规则,可以将特定的URL请求映射到相应的控制器方法上,从而实现请求的处理和响应的返回,需要的朋友可以参考下
Spring Boot对静态资源的映射规则
1.所有/webjars/**,都去classpath:/META-INF/resources/webjars/找资源
webjars:以jar包方式引入静态资源。
<!‐‐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>3.4.1</version> </dependency>
- 访问路径://127.0.0.1:8089/webjars/jquery/3.4.1/jquery.js
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的index.html页面;被 /** 映射
localhost:8089/:找首页(index.html)
4. 所有的 **/favicon.ico都是在静态资源文件下找的。
@Override public void addResourceHandlers(ResourceHandlerRegistry registry) { if (!this.resourceProperties.isAddMappings()) { logger.debug("Default resource handling disabled"); return; } Duration cachePeriod = this.resourceProperties.getCache().getPeriod(); CacheControl cacheControl = this.resourceProperties.getCache().getCachecontrol().toHttpCacheControl(); if (!registry.hasMappingForPattern("/webjars/**")) { customizeResourceHandlerRegistration(registry.addResourceHandler("/webjars/**") .addResourceLocations("classpath:/META-INF/resources/webjars/") .setCachePeriod(getSeconds(cachePeriod)).setCacheControl(cacheControl)); } String staticPathPattern = this.mvcProperties.getStaticPathPattern(); //静态资源文件夹映射 if (!registry.hasMappingForPattern(staticPathPattern)) { customizeResourceHandlerRegistration(registry.addResourceHandler(staticPathPattern) .addResourceLocations(getResourceLocations(this.resourceProperties.getStaticLocations())) .setCachePeriod(getSeconds(cachePeriod)).setCacheControl(cacheControl)); } }
配置欢迎页映射
@Bean public WelcomePageHandlerMapping welcomePageHandlerMapping(ApplicationContext applicationContext) { WelcomePageHandlerMapping welcomePageHandlerMapping = new WelcomePageHandlerMapping( new TemplateAvailabilityProviders(applicationContext), applicationContext, getWelcomePage(), this.mvcProperties.getStaticPathPattern()); welcomePageHandlerMapping.setInterceptors(getInterceptors()); return welcomePageHandlerMapping; }
@Configuration @ConditionalOnProperty(value = "spring.mvc.favicon.enabled", matchIfMissing = true) public static class FaviconConfiguration implements ResourceLoaderAware { private final ResourceProperties resourceProperties; private ResourceLoader resourceLoader; public FaviconConfiguration(ResourceProperties resourceProperties) { this.resourceProperties = resourceProperties; } @Override public void setResourceLoader(ResourceLoader resourceLoader) { this.resourceLoader = resourceLoader; } // 映射**/favicon.ico @Bean public SimpleUrlHandlerMapping faviconHandlerMapping() { SimpleUrlHandlerMapping mapping = new SimpleUrlHandlerMapping(); mapping.setOrder(Ordered.HIGHEST_PRECEDENCE + 1); mapping.setUrlMap(Collections.singletonMap("**/favicon.ico", faviconRequestHandler())); return mapping; } @Bean public ResourceHttpRequestHandler faviconRequestHandler() { ResourceHttpRequestHandler requestHandler = new ResourceHttpRequestHandler(); requestHandler.setLocations(resolveFaviconLocations()); return requestHandler; } private List<Resource> resolveFaviconLocations() { String[] staticLocations = getResourceLocations(this.resourceProperties.getStaticLocations()); List<Resource> locations = new ArrayList<>(staticLocations.length + 1); Arrays.stream(staticLocations).map(this.resourceLoader::getResource).forEach(locations::add); locations.add(new ClassPathResource("/")); return Collections.unmodifiableList(locations); } } }
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