SpringBoot对静态资源的映射规则默认配置

我不是女神ヾ 2022-03-16 09:14 601阅读 0赞

### 一.相关配置源码 ###

@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;
    			}
    
    		}
    
    ```

### 二.由源码可知 ###

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,网址[http://www.webjars.org/][http_www.webjars.org]

例如：

![20190227112648532.png][]

![20190227112754315.png][]

直接访问： [http://localhost:8080/webjars/jquery/3.3.1/jquery.js][http_localhost_8080_webjars_jquery_3.3.1_jquery.js]可以获取到静态资源

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3htMzkzMzkyNjI1_size_16_color_FFFFFF_t_70][]

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

默认配置的静态路径为：

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

3）、欢迎页(首页)， 静态资源文件夹下的所有index.html页面，被"/\*\*"映射

![20190227113225209.png][]

4）、网站logo,所有的 \*\*/favicon.ico  都是在静态资源文件下找

例如放在：

![20190227113611739.png][]

访问页面可以得到：

![20190227113556964.png][]

[http_www.webjars.org]: http://www.webjars.org/
[20190227112648532.png]: /images/20220316/688b618fe62b4fc1b02a29968b1df716.png
[20190227112754315.png]: /images/20220316/f54fbbbdb7514c07b25e2e5ab969ae7c.png
[http_localhost_8080_webjars_jquery_3.3.1_jquery.js]: http://localhost:8080/webjars/jquery/3.3.1/jquery.js
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3htMzkzMzkyNjI1_size_16_color_FFFFFF_t_70]: /images/20220316/5597e79c2d9742bd9545f2f21e5801ca.png
[20190227113225209.png]: /images/20220316/b24195353b1943848d9f1d130d3c923d.png
[20190227113611739.png]: /images/20220316/99e3a54ae1ab4460a45b5c19a6c8e500.png
[20190227113556964.png]: /images/20220316/bde1b3bc9bca41ea9b776ffeaff5146f.png