SpringBoot Web静态资源访问规则

1、默认静态资源访问

Spring Boot的默认静态资源的路径为：
spring.resources.static-locations=classpath:/META-INF/resources/

spring.resources.static-locations=classpath:/META-INF/resources/,

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

spring.resources.static-locations=classpath:/static/

spring.resources.static-locations=classpath:/public/
优先级从从高到低。
默认情况不配置静态资源访问路径时

# 自定义静态资源访问路径，可以指定多个，之间用逗号隔开
spring.resources.static-locations=classpath:/myabc/,classpath:/myhhh

 

SpringBoot中的SpringMVC配置功能都是在WebMvcAutoConfiguration类中，xxxxAutoConfiguration就是帮我们给容器中自动配置组件的；idea全局搜索的快捷键是两次shift，查看webMvcAutoConfiguration 查看webMvc自动配置类

WebMvcAutoConfiguration类的原理以后至少还要稍微掌握，而这里文章只是来看它的具体的关键代码，这里只例举部分关键代码，多了看着也头疼，看不懂没关系哈哈哈可跳过源码阶段，何必徒增烦扰？

public void addResourceHandlers(ResourceHandlerRegistry registry) {
  if (!this.resourceProperties.isAddMappings()) {
    logger.debug("Default resource handling disabled");
  } else {
    Duration cachePeriod = this.resourceProperties.getCache().getPeriod();
    CacheControl cacheControl = this.resourceProperties.getCache().getCachecontrol().toHttpCacheControl();
    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));
    }

  }
}