我正在尝试从application.properties文件加载api键值，下面是类文件。我无法启动应用程序，因为它无法找到唯一的bean。不知道我错过了什么。有人能帮忙吗。
这是我们的appproperties.java

@Component
@PropertySource("classpath:application.properties")
@ConfigurationProperties(prefix = AppProperties.APP_PROPERTIES_PREFIX)
public class AppProperties {

    public static final String APP_PROPERTIES_PREFIX = "bi";

    private String accessTokenUri;
    private String clientId;
    private String clientSecret;
    private String basicAuth;
    private String apiKey;
    //getters and setters
    }

这是我们的diagnosticproperties.java

@Component
@PropertySource("classpath:application.properties")
@ConfigurationProperties(prefix = "bi")
public class DiagnosticProperties extends AppProperties {
    private String diagnosisUrl;
//getters and setters 
}

这是我们的observationproperties.java

@Component
@PropertySource("classpath:application.properties")
@ConfigurationProperties(prefix = "bi")
public class ObservationProperties extends AppProperties {
    private String observationUrl;
//getters and setters
}

这是我们的diagnosticserviceimpl.java

@Service
public class DiagnosticServiceImpl implements DiagnosticService {
    private static final Logger LOGGER = 
          LoggerFactory.getLogger(ObservationServiceImpl.class);

    private final WebClient webClient;
    private final DiagnosticProperties diagnosticProperties;

    public DiagnosticServiceImpl(final WebClient webClient,final DiagnosticProperties 
                  diagnosticProperties) {
        this.webClient = webClient;
        this.diagnosticProperties = diagnosticProperties;
    }

    @Override
    public Mono<DiagnosticResponse> getPatientDiagnosticDetails(final String uri) {
        return diagnosticDetails(uri);
    }