我在Spring Boot RabbitMQ中写了一段消费者代码。在得到消息后，我想进一步处理它。但为此，我想在回调之外访问它。我跳过了Postmapping函数中一些不相关的代码。

@CrossOrigin(origins = "*")
@RestController
public class PlottingRabbitMQ {
    private static Map<String, String> linkParams = new HashMap<>();
    static Logger logger
        = LoggerFactory.getLogger(LoginRabbitMQ.class);

private final static String PLOTTING_RESEND_QUEUE = "plotting_resend";

@JsonDeserialize
@PostMapping(value = "/plotting")
public Object createLink(@RequestBody PlottingModel plotting, @RequestHeader Map<String, String> plottingHeaders) throws Exception {

        ConnectionFactory factory_plotting_resend = new ConnectionFactory();
        factory_plotting_resend.setHost("localhost");
        Connection connection_plotting_resend = factory_plotting_resend.newConnection();
        Channel channel_plotting_resend = connection_plotting_resend.createChannel();
        channel_plotting_resend.queueDeclare(PLOTTING_RESEND_QUEUE,
                false, false,false, null);
        logger.info("[!] Waiting for messages. To exit press Ctrl+C");

        Consumer consumer_plotting_resend = new DefaultConsumer(channel_plotting_resend){
            @Override
            public void handleDelivery(String consumerTag,
                                       Envelope envelope,
                                       AMQP.BasicProperties properties,
                                       byte[] body)
                    throws IOException {
                String respBodyPlotting = new String(body, "UTF-8");
                logger.info("[x] Message Received' " + respBodyPlotting + "'");
            }
        };

        channel_plotting_resend.basicConsume(PLOTTING_RESEND_QUEUE, true, consumer_plotting_resend);
        System.out.println("Received outside callback is: " + respBodyPlotting);

就像你在底部看到的，我已经写了一个系统，我想在channel_plotting_resend回调之外打印respBodyPlotting（当我试图打印它的时候，我得到了一个错误）。在logger.info中，我收到了消息，但是我不知道如何在函数之外得到它。有人能帮助我吗？