Spring Boot Web 开发

SpringBoot对静态资源的映射规则

webjars

WebMvcAutoConfiguration

@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();
		if (!registry.hasMappingForPattern(staticPathPattern)) {
			customizeResourceHandlerRegistration(
					registry.addResourceHandler(staticPathPattern)
							.addResourceLocations(getResourceLocations(
									this.resourceProperties.getStaticLocations()))
							.setCachePeriod(getSeconds(cachePeriod))
							.setCacheControl(cacheControl));
		}
	}

1. 所有的/webjars/**，都去classpath:/META-INF/resources/webjars/找资源

• webjars：以jar包的方式引入静态资源

/** 访问当前项目的任何位置(静态资源的文件夹)

通过查看源码可以定位到静态资源位置

即以下路径

"classpath:/META-INF/resources/", 
"classpath:/resources/",
"classpath:/static/", 
"classpath:/public/" 
"/"：当前项目的根路径

欢迎页

private Optional<Resource> getWelcomePage() {
    // 去获取静态资源位置
    String[] locations = getResourceLocations(
        this.resourceProperties.getStaticLocations());
    return Arrays.stream(locations).map(this::getIndexHtml)
        .filter(this::isReadable).findFirst();
}

图标