java – 自动装配SimpMessagingTemplate

UserService.java – 自动装配失败,template = null

@Service
public class UserService{
    @Autowired
    private SimpMessagingTemplate template;

    // Some Code

    public void tellUser(String username,String url) {
        // This is always true
        System.out.println("TEMPLATE NULL? " +(this.template == null));
        // Further code omitted
    }
}

SocketController.java – 自动装配工作,Spring Websockets按照惯例工作.

@Controller
public class WebSocketController {
    @Autowired
    private SimpMessagingTemplate template;

    public void tellUser(String username,String url) {
        // False here,template is autowired correctly
        System.out.println("TEMPLATE NULL? " +(this.template == null));
        this.template.convertAndSendToUser(username,"/test/notify",new Greeting("USER SPECIFIC MESSAGE: " + url));
    }
}

WebSocketConfig.java

@Configuration
@EnableScheduling
@EnableWebSocketMessageBroker
public class WebSocketConfig extends AbstractWebSocketMessageBrokerConfigurer {

    @Override
    public void configureMessageBroker(MessageBrokerRegistry config) {
        config.enableSimpleBroker("/user","/test");
        config.setApplicationDestinationPrefixes("/app");
    }

    @Override
    public void registerStompEndpoints(StompEndpointRegistry registry) {
        registry.addEndpoint("/test").withSockJS();

    }
}

所以基本上自动装配在我??的Controller类中工作,但不在我的服务中.我需要在服务中手动调用convertAndSendToUser.在控制器和服务之间自动装配SimpMessagingTemplate有什么区别？关于为什么会发生这种情况的任何意见都非常感谢