在Spring Boot中，哪个类将首先被​​初始化@Component或@Configuration

Question

我有一个用@Component注释的类，该类用于初始化application.yml配置属性。服务类正在使用配置属性。但是有时我的Service类实例在Configuration类之前创建，并且在Service类中获得了空属性值，它是随机的而不是特定的模式。

配置初始化器类..

@Component
public class ConfigInitializer implements InitializingBean {
    private static final Logger log = LoggerFactory.getLogger(ConfigInitializer.class);
    @Autowired
    ProxyConfig proxyConfig;

    /*@PostConstruct
    public void postConstruct(){
        setProperties();
    }
    */
    @Override
    public void afterPropertiesSet() {
        setProperties();
    }
    private void setSystemProperties(){
        log.debug("Setting properties...");
        Properties props = new Properties();
        props.put("PROXY_URL", proxyConfig.getProxyUrl());
        props.put("PROXY_PORT", proxyConfig.getProxyPort());
        System.getProperties().putAll(props);
    }
} 


@Component
@ConfigurationProperties(prefix = "proxy-config")
public static class ProxyConfig {
    private String proxyUrl;
    private String proxyPort;

    public String getProxyUrl() {
        return proxyUrl;
    }

    public void setProxyUrl(String proxyUrl) {
        this.proxyUrl = proxyUrl;
    }

    public String getProxyPort() {
        return proxyPort;
    }

    public void setProxyPort(String proxyPort) {
        this.proxyPort = proxyPort;
    }

}

服务等级..

@Service("receiverService")
public class ReceiverService {

    private static final Logger logger = LoggerFactory.getLogger(ReceiverService.class);
    private ExecutorService executorService = Executors.newSingleThreadExecutor();

    @Autowired
    public ReceiverService() {
        initClient();
    }

    private void initClient() {
        Future future = executorService.submit(new Callable(){
            public Object call() throws Exception {
                String value = System.getProperty("PROXY_URL"); **//Here I am getting null**    
                logger.info("Values : " + value); 
            }
        });

        System.out.println("future.get() = " + future.get());
    }
}  

以上Service类获得null个值String value = System.getProperty("PROXY_URL") 当我在Service类上使用@DependsOn注释时，它可以正常工作。 据我所知，我知道Spring没有特定的bean创建顺序。

我想知道是否像下面这样在@Configuration类上使用@Component而不是ConfigInitializer，请问是否会初始化ConfigInitializer  在其他豆类之前上课？。

  @Configuration    
  public class ConfigInitializer implements InitializingBean { 
    //code here
  }