mqtt数据接收并根据设备配置表插入iotdb Java代码


PUAAI4.0
未使用插件
以下是一个使用Java编写的示例代码，用于接收MQTT数据并根据设备配置表将数据插入到IoTDB数据库中：

import org.eclipse.paho.client.mqttv3.*;
import org.eclipse.paho.client.mqttv3.persist.MemoryPersistence;
import org.apache.iotdb.session.IoTDBSession;
import org.apache.iotdb.session.SessionDataSet;

import java.util.HashMap;
import java.util.Map;

public class MqttToIoTDB {

    // MQTT连接信息
    private static final String MQTT_BROKER = "tcp://mqtt.example.com:1883";
    private static final String MQTT_USERNAME = "your_username";
    private static final String MQTT_PASSWORD = "your_password";
    private static final String MQTT_TOPIC = "your_topic";

    // IoTDB连接信息
    private static final String IOTDB_HOST = "iotdb.example.com";
    private static final int IOTDB_PORT = 6667;
    private static final String IOTDB_USERNAME = "your_username";
    private static final String IOTDB_PASSWORD = "your_password";

    // 设备配置表，用于映射设备字段和IoTDB表
    private static final Map<String, String> DEVICE_CONFIG = new HashMap<>();
    static {
        DEVICE_CONFIG.put("field1", "table1");
        DEVICE_CONFIG.put("field2", "table2");
        // 添加更多字段和表的映射关系
    }

    public static void main(String[] args) {
        try {
            // 创建MQTT客户端
            MqttClient mqttClient = new MqttClient(MQTT_BROKER, MqttClient.generateClientId(), new MemoryPersistence());
            MqttConnectOptions mqttConnectOptions = new MqttConnectOptions();
            mqttConnectOptions.setUserName(MQTT_USERNAME);
            mqttConnectOptions.setPassword(MQTT_PASSWORD.toCharArray());

            // 设置消息处理回调
            mqttClient.setCallback(new MqttCallback() {
                @Override
                public void connectionLost(Throwable throwable) {
                    System.out.println("MQTT connection lost");
                }

                @Override
                public void messageArrived(String topic, MqttMessage mqttMessage) throws Exception {
                    // 解析接收到的消息
                    String data = new String(mqttMessage.getPayload());
                    String field = topic.substring(topic.lastIndexOf("/") + 1);

                    // 根据设备配置表映射字段和表
                    if (DEVICE_CONFIG.containsKey(field)) {
                        String table = DEVICE_CONFIG.get(field);

                        // 连接到IoTDB数据库
                        IoTDBSession session = new IoTDBSession(IOTDB_HOST, IOTDB_PORT, IOTDB_USERNAME, IOTDB_PASSWORD);

                        // 插入数据到IoTDB
                        String sql = String.format("INSERT INTO %s(timestamp, %s) VALUES (%d, %s)",
                                table, field, System.currentTimeMillis(), data);
                        session.executeNonQuery(sql);

                        // 关闭连接
                        session.close();
                    }
                }

                @Override
                public void deliveryComplete(IMqttDeliveryToken iMqttDeliveryToken) {
                }
            });

            // 连接到MQTT服务器并订阅主题
            mqttClient.connect(mqttConnectOptions);
            mqttClient.subscribe(MQTT_TOPIC);

        } catch (MqttException e) {
            e.printStackTrace();
        }
    }
}
请根据您的实际情况修改代码中的相关参数，包括MQTT连接信息、IoTDB连接信息和设备配置表。确保您已经添加所需的依赖库（org.eclipse.paho.client.mqttv3和org.apache.iotdb.session）。