聊聊springboot静态资源加载的规则

public void addResourceHandlers(ResourceHandlerReGIStry registry) {
   //默认配置没有找到静态资源
	if (!this.resourceProperties.isAddMappings()) {
    // 已禁用默认资源处理
       logger.debug("Default resource handling disabled");
   } else {
       Duration cachePeriod = this.resourceProperties.getCache().getPeriod();
       CacheControl cacheControl = this.resourceProperties.getCache().getCachecontrol().toHttpCacheControl();
       //webjars  Maven 引入静态资源
       if (!registry.hasMappingForPattern("/webjars/**")) {
           this.customizeResourceHandlerRegistration(registry.addResourceHandler(new String[]{"/webjars/**"}).addResourceLocations(new String[]{"classpath:/META-INF/resources/webjars/"}).setCachePeriod(this.getSeconds(cachePeriod)).setCacheControl(cacheControl));
       }
       String staticPathPattern = this.mvcProperties.getStaticPathPattern();
       if (!registry.hasMappingForPattern(staticPathPattern)) {
           this.customizeResourceHandlerRegistration(registry.addResourceHandler(new String[]{staticPathPattern}).addResourceLocations(WebMvcAutoConfiguration.getResourceLocations(this.resourceProperties.getStaticLocations())).setCachePeriod(this.getSeconds(cachePeriod)).setCacheControl(cacheControl));
       }
   }
}

<!--webjar 引入jquery-->
<dependency>
    <groupId>org.webjars</groupId>
    <artifactId>jquery</artifactId>
    <version>3.4.1</version>
</dependency>

String staticPathPattern = this.mvcProperties.getStaticPathPattern();
if (!registry.hasMappingForPattern(staticPathPattern)) {
	this.customizeResourceHandlerRegistration(registry.addResourceHandler(new String[]{staticPathPattern}).addResourceLocations(WebMvcAutoConfiguration.getResourceLocations(this.resourceProperties.getStaticLocations())).setCachePeriod(this.getSeconds(cachePeriod)).setCacheControl(cacheControl));
}

private static final String[] CLASSPATH_RESOURCE_LOCATIONS = new String[]{
"classpath:/META-INF/resources/",
 "classpath:/resources/",
 "classpath:/static/", 
 "classpath:/public/"};
    private String[] staticLocations;
    private boolean addMappings;
    private final ResourceProperties.Chain chain;
    private final ResourceProperties.Cache cache;
    public ResourceProperties() {
        this.staticLocations = CLASSPATH_RESOURCE_LOCATIONS;
        this.addMappings = true;
        this.chain = new ResourceProperties.Chain();
        this.cache = new ResourceProperties.Cache();
    }
    public String[] getStaticLocations() {
        return this.staticLocations;
    }

spring.resources.static-locations=classpath:/coding/,classpath:/cpown/

@Bean
public WelcomePageHandlerMapping welcomePageHandlerMapping(ApplicationContext applicationContext, FORMattinGConversionService mvcConversionService, ResourceUrlProvider mvcResourceUrlProvider) {
     WelcomePageHandlerMapping welcomePageHandlerMapping = new WelcomePageHandlerMapping(new TemplateAvailabilityProviders(applicationContext), applicationContext, this.getWelcomePage(), this.mvcProperties.getStaticPathPattern());
     welcomePageHandlerMapping.setInterceptors(this.getInterceptors(mvcConversionService, mvcResourceUrlProvider));
     welcomePageHandlerMapping.setCorsConfigurations(this.getCorsConfigurations());
     return welcomePageHandlerMapping;
 }
 private Optional<Resource> getWelcomePage() {
     String[] locations = WebMvcAutoConfiguration.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");
 }

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