9、框架-SpringBoot-定制图标和首页

本文链接： https://blog.csdn.net/qq_40871734/article/details/100009581

静态资源文件夹说完后，继续看源码，可以看到一个欢迎页的映射，就是我们的首页

@Bean
        public WelcomePageHandlerMapping welcomePageHandlerMapping(ApplicationContext applicationContext) {
            return new WelcomePageHandlerMapping(new TemplateAvailabilityProviders(applicationContext), applicationContext, this.getWelcomePage(), this.mvcProperties.getStaticPathPattern());
        }

点进去继续看

private Optional<Resource> getWelcomePage() {
            String[] locations = getResourceLocations(this.resourceProperties.getStaticLocations());
            return Arrays.stream(locations).map(this::getIndexHtml).filter(this::isReadable).findFirst();
        }

        private Resource getIndexHtml(String location) {
            return this.resourceLoader.getResource(location + "index.html");
        }

欢迎页，静态资源文件夹下的所有index.html页面；被 /** 映射。

比如我访问 localhost：8080/ ，就会找静态资源文件夹下的 index.html

继续向下阅读源码，可以看到一个好玩的功能，配置自己喜欢的图标

@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;
            }

            public void setResourceLoader(ResourceLoader resourceLoader) {
                this.resourceLoader = resourceLoader;
            }

            @Bean
            public SimpleUrlHandlerMapping faviconHandlerMapping() {
                SimpleUrlHandlerMapping mapping = new SimpleUrlHandlerMapping();
                mapping.setOrder(-2147483647);
                mapping.setUrlMap(Collections.singletonMap("**/favicon.ico", this.faviconRequestHandler()));
                return mapping;
            }

            @Bean
            public ResourceHttpRequestHandler faviconRequestHandler() {
                ResourceHttpRequestHandler requestHandler = new ResourceHttpRequestHandler();
                requestHandler.setLocations(this.resolveFaviconLocations());
                return requestHandler;
            }

            private List<Resource> resolveFaviconLocations() {
                String[] staticLocations = WebMvcAutoConfiguration.WebMvcAutoConfigurationAdapter.getResourceLocations(this.resourceProperties.getStaticLocations());
                List<Resource> locations = new ArrayList(staticLocations.length + 1);
                Stream var10000 = Arrays.stream(staticLocations);
                ResourceLoader var10001 = this.resourceLoader;
                this.resourceLoader.getClass();
                var10000.map(var10001::getResource).forEach(locations::add);
                locations.add(new ClassPathResource("/"));
                return Collections.unmodifiableList(locations);
            }
        }

“**/favicon.ico” ，就是图标定义的格式！也是在静态资源文件夹下定义，我们可以自定义来测试一下

自己放一个图标进去，然后在配置文件中关闭SpringBoot默认的图标!

#关闭默认图标
spring.mvc.favicon.enabled=false

清除浏览器缓存，刷新网页，发现图标已经变成自己的了

也可以自己通过配置文件来指定一下，哪些文件夹是需要我们放静态资源文件的，在application.properties中配置；

spring.resources.static-locations=classpath:/hello/,classpath:/chao/

一旦自己定义了静态文件夹的路径，原来的就都会失效了

9、框架-SpringBoot-定制图标和首页

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