Java @尽管@ConditionalOnProperty，但自动连线使用了错误的实现

我遵循了我在网上找到的教程，使用

@ConditionalOnProperty

和

@Bean

为

@Autowired

选择一个实现

为了完整性（尽管与问题无关），此操作的目的是选择一个“ICE服务器列表”提供程序-在配置文件中本地配置，或使用Twilio API获取WebRTC的STUN和TURN服务器列表

以下是相关代码：

application.properties

Controller.java

IceProvider.java

TwilioIceProvider.java

在调用

iceProvider.getIceServers（）的客户端请求时
既然只调用了
twilioIceProvider
工厂方法，而
localIceProvider
方法不调用，为什么
localIceProvider
是
@Autowired
？
从
IceProvider
实现中删除
@Component
注释。您已经在Bean定义方法上使用
@Bean
将它们声明为Bean

ice.provider = twilio

@ComponentScan
@RestController
@EnableAutoConfiguration
@EnableWebSocket
public class Controller {

    @Autowired
    private IceProvider iceProvider;

    @Bean
    @ConditionalOnProperty(name = "ice.provider", havingValue = "local")
    public IceProvider localIceProvider() {
        logger.info("Creating ICE server provider - LOCAL");
        return new LocalIceProvider();
    }

    @Bean
    @ConditionalOnProperty(name = "ice.provider", havingValue = "twilio")
    public IceProvider twilioIceProvider() {
        logger.info("Creating ICE server provider - TWILIO");
        return new TwilioIceProvider();
    }
}

public interface IceProvider {
    List<ICEServer> getIceServers(String username);
}

@Component
public class LocalIceProvider implements IceProvider {

    private final static Logger logger = Logger.getLogger(LocalIceProvider.class);

    @PostConstruct
    void init() {
        logger.info("Reading local ICE Server list config file");

        // ...
    }

    @Override
    public List<ICEServer> getIceServers(String username) {
        logger.info("Returning locally configured ICE servers");

        // ...    
    }
}

@Component
public class TwilioIceProvider implements IceProvider {

    private final static Logger logger = Logger.getLogger(TwilioIceProvider.class);

    @Override
    public List<ICEServer> getIceServers(String username) {
        logger.info("Doing Twilio API call and returning result");

        // ...
    }
}

...
[2017-12-31 21:11:53 INFO ] [localhost-startStop-1] [ice.LocalIceProvider] Reading local ICE Server list config file
...
[2017-12-31 21:11:55 INFO ] [main] [com.example.Controller] Creating ICE server provider - TWILIO
...

[2017-12-31 21:14:40 INFO ] [http-nio-9083-exec-5] [ice.LocalIceProvider] Returning locally configured ICE servers