Mqtt的messageArrived里面无法调用Service层进行CRUD解决方案

 在MQTT的messageArrived方法中无法直接调用Service层进行CRUD操作，因为messageArrived方法通常是在一个单独的线程中执行的，而Service层的操作可能需要在应用程序的主线程中进行。解决方案如下：

/**
 * Mqtt连接回调函数 ，用来接收已经订阅的消息
 */

public class MqttReceiveCallback implements MqttCallback {

    private ExecutorService executor;

    public MqttReceiveCallback() {
        // 创建一个固定大小的线程池
        executor = Executors.newFixedThreadPool(10);
    }


    
    @Override
    public void connectionLost(Throwable throwable) {
        System.out.println("Client 连接丢失 : "+ throwable.getMessage());
    }

    @Override
    public void messageArrived(String topic, MqttMessage message) throws Exception {

        System.out.println("Client 接收消息主题 : " + topic);
        System.out.println("Client 接收消息Qos : " + message.getQos());
        System.out.println("Client 接收消息内容 : " + new String(message.getPayload()));

        executor.submit(() -> {
            try {
                // 在异步任务中调用Service层进行CRUD操作
                DataStaticService datastaticService = (DataStaticService)SpringContextUtil.getBean("datastaticService");
                Datastatic datastatic = JSON.parseObject(message.getPayload(), Datastatic.class);
                //将数据保存至数据库
                datastaticService.save(datastatic);
            } catch (Exception e) {
                e.printStackTrace();
                // 处理异常情况
            }
        });
    }

    @Override
    public void deliveryComplete(IMqttDeliveryToken iMqttDeliveryToken) {

    }


}

public class SpringContextUtil implements ApplicationContextAware {
	 
	 private static ApplicationContext   applicationContext;
	 
	    /**
	     * 实现ApplicationContextAware接口的回调方法，设置上下文环境
	     */
	    public void setApplicationContext(ApplicationContext applicationContext){
	        SpringContextUtil.applicationContext = applicationContext;
	    }
	 
	    public static ApplicationContext getApplicationContext(){
	        return applicationContext;
	    }
	 
	    /**
	     * 获取对象
	     */
	    public static Object getBean(String name) throws BeansException{
	        return applicationContext.getBean(name);
	    }
	 
	}

 网上试了很多种方法都没用，还是chatgpt找到了答案！