配置方法

1. 打开WebJars - Web Libraries in Jars，找到jquery，
2. 导入依赖

   <dependency>
       <groupId>org.webjars</groupId>
       <artifactId>jquery</artifactId>
       <version>3.6.0</version>
   </dependency>

     3. 在resources文件夹下，建立static，public，resources文件夹，其中3个文件夹的文件访问优先级为，resources>public>static。

public void addResourceHandlers(ResourceHandlerRegistry registry) {
          if (!this.resourceProperties.isAddMappings()) {
                logger.debug("Default resource handling disabled");
          } else {
                this.addResourceHandler(registry, "/webjars/**", "classpath:/META-INF/resources/webjars/");
                this.addResourceHandler(registry, this.mvcProperties.getStaticPathPattern(), (registration) -> {
                    registration.addResourceLocations(this.resourceProperties.getStaticLocations());
                    if (this.servletContext != null) {
                        ServletContextResource resource = new ServletContextResource(this.servletContext, "/");
                        registration.addResourceLocations(new Resource[]{resource});
                    }

                });
          }
 }

根据代码，如果在properties文件中建立了映射，则不会自动访问resources的文件夹。