解读静态资源访问static-locations和static-path-pattern

	@Override
	public void addResourceHandlers(ResourceHandlerRegistry registry) {
		if (!this.resourceProperties.isAddMappings()) {
			logger.debug("Default resource handling disabled");
				return;
		}
        //配置访问地址为/webjars/**时，去/META-INF/resources/webjars文件夹下寻找资源
		addResourceHandler(registry, "/webjars/**", "classpath:/META-INF/resources/webjars/");
		addResourceHandler(registry, this.mvcProperties.getStaticPathPattern(), (registration) -> {
				            
        registration.addResourceLocations(this.resourceProperties.getStaticLocations());
		if (this.servletContext != null) {
				ServletContextResource resource = new ServletContextResource(this.servletContext, SERVLET_LOCATION);
				registration.addResourceLocations(resource);
		}
			});
		}

private String staticPathPattern = "/**";

private static final String[] CLASSPATH_RESOURCE_LOCATIONS = { "classpath:/META-INF/resources/",
				"classpath:/resources/", "classpath:/static/", "classpath:/public/" };

		/**
		 * Locations of static resources. Defaults to classpath:[/META-INF/resources/,
		 * /resources/, /static/, /public/].
		 */
private String[] staticLocations = CLASSPATH_RESOURCE_LOCATIONS;

spring:
  mvc:
    static-path-pattern: /liang/**  //会导致欢迎页和favicon.ico失效

spring:
  web:
    resources:
      static-locations: classpath:/yuan/

spring
  web:
    resources:
      static-locations: classpath:/yuan/
  mvc:
    static-path-pattern: /liang/**

@Configuration
public class WebMvcConfiguration implements WebMvcConfigurer {

    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        //registry.addResourceHandler("访问的路径").addResourceLocations("资源的路径");
        registry.addResourceHandler("swagger-ui.html")
                .addResourceLocations("classpath:/META-INF/resources/");
    }