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IoTDB支持MQTT v3.1（OASIS标准）协议。IoTDB服务器包括内置的MQTT服务，该服务允许远程设备将消息直接发送到IoTDB服务器。

客户端包准备

jar包下载

maven

<dependency>
  <groupId>org.fusesource.mqtt-client</groupId>
  <artifactId>mqtt-client</artifactId>
  <version>1.12</version>
</dependency>

IoTDB开启内置MQTT服务

默认false，改为true，即可开启

程序测试传值

    public static void main(String[] args) throws Exception{

        MQTT mqtt = new MQTT();
        mqtt.setHost("127.0.0.1", 1883);
        mqtt.setUserName("root");
        mqtt.setPassword("root");

        BlockingConnection connection = mqtt.blockingConnection();
        connection.connect();

        String payload = "{\n" +
                "\t\"device\": \"root.test.wf01.wt01\",\n" +
                "\t\"timestamp\": 1611108000000,\n" +
                "\t\"measurements\": [\"temperature\", \"status\", \"hardware\"],\n" +
                "\t\"values\": [21.2, true, \"hello\"]\n" +
                "}";
        connection.publish("root.test.wf01.wt01",payload.getBytes(), QoS.AT_LEAST_ONCE,false);

        connection.disconnect();

    }