基于springboot搭建的物联网平台实现mqtt协议接入，不用列出代码

好的，下面是基于Spring Boot搭建物联网平台实现MQTT协议接入的流程介绍：

1. 引入Eclipse Paho MQTT客户端库

在pom.xml文件中添加以下依赖：

<dependency>
    <groupId>org.eclipse.paho</groupId>
    <artifactId>org.eclipse.paho.client.mqttv3</artifactId>
    <version>1.2.5</version>
</dependency>

2. 配置MQTT连接参数

在application.properties文件中添加以下配置：

# MQTT连接参数
mqtt.host=tcp://localhost:1883
mqtt.username=admin
mqtt.password=admin
mqtt.clientId=clientId

3. 实现MQTT客户端连接管理

创建MQTT客户端连接管理类，负责连接、断开连接、订阅、取消订阅等操作。

@Service
public class MqttClientManager {

    private static final String CLIENT_ID = "clientId";
    private static final int QOS = 1;
    private static final String[] TOPICS = {"topic1", "topic2"};

    private MqttClient mqttClient;

    @Value("${mqtt.host}")
    private String mqttHost;

    @Value("${mqtt.username}")
    private String mqttUsername;

    @Value("${mqtt.password}")
    private String mqttPassword;

    /**
     * 连接MQTT服务器
     *
     * @throws MqttException
     */
    public void connect() throws MqttException {
        mqttClient = new MqttClient(mqttHost, CLIENT_ID, new MemoryPersistence());
        mqttClient.connect(getMqttConnectOptions());
        subscribe();
    }

    /**
     * 断开MQTT服务器连接
     *
     * @throws MqttException
     */
    public void disconnect() throws MqttException {
        mqttClient.disconnect();
    }

    /**
     * 订阅主题
     *
     * @throws MqttException
     */
    private void subscribe() throws MqttException {
        mqttClient.subscribe(TOPICS, new MqttMessageListener());
    }

    /**
     * 取消订阅主题
     *
     * @throws MqttException
     */
    public void unsubscribe() throws MqttException {
        mqttClient.unsubscribe(TOPICS);
    }

    /**
     * 发布消息
     *
     * @param topic
     * @param message
     * @throws MqttException
     */
    public void publish(String topic, String message) throws MqttException {
        MqttMessage mqttMessage = new MqttMessage(message.getBytes());
        mqttMessage.setQos(QOS);
        mqttClient.publish(topic, mqttMessage);
    }

    /**
     * 获取MQTT连接参数
     *
     * @return
     */
    private MqttConnectOptions getMqttConnectOptions() {
        MqttConnectOptions options = new MqttConnectOptions();
        options.setCleanSession(true);
        options.setUserName(mqttUsername);
        options.setPassword(mqttPassword.toCharArray());
        return options;
    }
}

4. 实现MQTT消息监听器

创建MQTT消息监听器类，负责处理接收到的MQTT消息。

public class MqttMessageListener implements IMqttMessageListener {

    @Override
    public void messageArrived(String topic, MqttMessage message) throws Exception {
        System.out.println("Received message: " + new String(message.getPayload()));
    }
}

5. 启动MQTT客户端连接

在Spring Boot启动类中启动MQTT客户端连接。

@SpringBootApplication
public class Application implements CommandLineRunner {

    @Autowired
    private MqttClientManager mqttClientManager;

    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }

    @Override
    public void run(String... args) throws Exception {
        mqttClientManager.connect();
    }
}

以上就是基于Spring Boot搭建物联网平台实现MQTT协议接入的流程介绍。