SpringBoot无法访问/static下静态资源的解决

@Configuration

public class SigninConfig extends WebMvcConfigurationSupport {

 @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/**")
                .addResourceLocations("classpath:/resources/")
                .addResourceLocations("classpath:/static/")
                .addResourceLocations("classpath:/public/");
        super.addResourceHandlers(registry);
    }

}

}