SpringBoot加载不出来application.yml文件的解决方法

@ConfigurationProperties(
    prefix = "com.fs"
)
public class DemoProperties {
    private String serviceName;

    public DemoProperties() {
    }

    public String getServiceName() {
        return this.serviceName;
    }

    public void setServiceName(String serviceName) {
        this.serviceName = serviceName;
    }
}

 public PropertySource<?> load(String name, Resource resource, String profile) throws IOException {
        if(ClassUtils.isPresent("org.yaml.snakeyaml.Yaml", (ClassLoader)null)) {
            YamlPropertySourceLoader.Processor processor = new YamlPropertySourceLoader.Processor(resource, profile);
            Map<String, Object> source = processor.process();
            if(!source.isEmpty()) {
                return new MapPropertySource(name, source);
            }
        }

        return null;
    }

			<dependency>
                <groupId>org.yaml</groupId>
                <artifactId>snakeyaml</artifactId>
                <version>${snakeyaml.version}</version>
                 </dependency>