尚硅谷springboot学习21-web开发-处理静态资源

　　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/　　

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" alt="" />

<!--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　

　　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；

　　例：

　　最后，静态资源的路径也可以自己配置，如果进行了配置，那么默认的路径就会失效