SpringBoot對靜態(tài)資源的映射規(guī)則詳解解讀

更新時間：2023年10月27日 09:09:19 作者：夜聆離殤

這篇文章主要介紹了SpringBoot對靜態(tài)資源的映射規(guī)則詳解解讀,在Spring Boot中,映射規(guī)則是用來定義URL與控制器方法之間的映射關系的,通過映射規(guī)則,可以將特定的URL請求映射到相應的控制器方法上,從而實現請求的處理和響應的返回,需要的朋友可以參考下

Spring Boot對靜態(tài)資源的映射規(guī)則

1.所有/webjars/**，都去classpath:/META-INF/resources/webjars/找資源

webjars：以jar包方式引入靜態(tài)資源。

<!‐‐引入jquery‐webjar,在訪問的時候只需要寫webjars下面資源的名稱即可‐‐>
<dependency>
    <groupId>org.webjars</groupId>
    <artifactId>jquery</artifactId>
    <version>3.4.1</version>
</dependency>

訪問路徑：//127.0.0.1:8089/webjars/jquery/3.4.1/jquery.js

2.　"/**" 訪問當前項目的任何資源，都去（靜態(tài)資源的文件夾）找映射

"classpath:/META‐INF/resources/",
"classpath:/resources/",
"classpath:/static/",
"classpath:/public/"

"/"：當前項目的根路徑

localhost:8080/abc === 去靜態(tài)資源文件夾里面找abc

3.　歡迎頁：靜態(tài)資源文件夾下的所有的index.html頁面；被 /** 映射

localhost:8089/：找首頁（index.html）

4.　所有的 **/favicon.ico都是在靜態(tài)資源文件下找的。

    @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();
　　　　　　　//靜態(tài)資源文件夾映射
            if (!registry.hasMappingForPattern(staticPathPattern)) {
                customizeResourceHandlerRegistration(registry.addResourceHandler(staticPathPattern)
                        .addResourceLocations(getResourceLocations(this.resourceProperties.getStaticLocations()))
                        .setCachePeriod(getSeconds(cachePeriod)).setCacheControl(cacheControl));
            }
        }

配置歡迎頁映射

    @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);
            }
        }
    }

到此這篇關于SpringBoot對靜態(tài)資源的映射規(guī)則詳解解讀的文章就介紹到這了,更多相關SpringBoot靜態(tài)資源的映射規(guī)則內容請搜索腳本之家以前的文章或繼續(xù)瀏覽下面的相關文章希望大家以后多多支持腳本之家！

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