使Spring simpMessagingTemplate与Websocket一起使用

Question

我一直在尝试让simpMessagingTemplate在Spring中发送到websocket，但无济于事。从对相关stackoverflow帖子和其他指南的了解中，我提供了必要的路径配置和映射。

我的代码如下所示：

RestController（我用来调用将消息发送到Websocket的消息）：

@RestController
public class RestControllers {

    @Autowired
    private SimpMessagingTemplate template;

    @RequestMapping("/test")
    public String doTest() {

        Message m = new Message();
        m.setFrom("foo");
        m.setText("bar");
        template.convertAndSend("/app/chat/test-topic", m);

        return m.toString();

    }

}

控制器：

@Controller
public class ChatController 
{
    @MessageMapping("/chat/{topic}")
    @SendTo("/topic/messages")
    public OutputMessage send(@DestinationVariable("topic") String topic,
                  Message message) throws Exception


    {
        System.out.println("THE MESSAGE WAS RECEIVED:" +  message.toString());
    return new OutputMessage(message.getFrom(), message.getText(), topic);
    }
}

配置：

@Configuration
@EnableWebSocketMessageBroker
public class WebSocketConfig extends AbstractWebSocketMessageBrokerConfigurer
{
    @Override
    public void configureMessageBroker(MessageBrokerRegistry config)
    {
        config.enableSimpleBroker("/topic");
        config.setApplicationDestinationPrefixes("/app");
    }

    @Override
    public void registerStompEndpoints(StompEndpointRegistry registry) //?? alternative only?
    {
        registry.addEndpoint("/chat").setAllowedOrigins("*").withSockJS();
    }
}