代码修改

svr/svr-cloud-device/pom.xml

@@ -150,7 +150,11 @@
            <version>2.0.0</version>
            <scope>compile</scope>
        </dependency>
        <dependency>
            <groupId>org.eclipse.paho</groupId>
            <artifactId>org.eclipse.paho.client.mqttv3</artifactId>
            <version>1.2.5</version>
        </dependency>
    </dependencies>
    <build>

svr/svr-cloud-device/src/main/java/com/yihu/jw/care/common/PostConstructUtil.java

@@ -0,0 +1,24 @@
package com.yihu.jw.care.common;
import com.yihu.jw.care.util.MQTTClientUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import javax.annotation.PostConstruct;
/**
 * 项目启动就执行的类
 * Created by yeshijie on 2022/5/7.
 */
@Component
public class PostConstructUtil {
    @Autowired
    private MQTTClientUtil mqttClientUtil;
    @PostConstruct
    public void init(){
        //启动电表的mqtt订阅
        mqttClientUtil.start();
    }
}

svr/svr-cloud-device/src/main/java/com/yihu/jw/care/util/MQTTClientUtil.java

@@ -0,0 +1,110 @@
package com.yihu.jw.care.util;
import org.eclipse.paho.client.mqttv3.*;
import org.eclipse.paho.client.mqttv3.persist.MemoryPersistence;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;
import java.util.concurrent.ScheduledExecutorService;
/**
 * Created by yeshijie on 2022/5/5.
 */
@Component
public class MQTTClientUtil {
    private static Logger logger = LoggerFactory.getLogger(MQTTClientUtil.class);
    public static final String HOST = "tcp://47.99.215.81:8885";
    public static final String TOPIC1 = "00752217643114/get/request/online";
//    public static final String TOPIC = "00752217643114/get/request/params";
    public static final String TOPIC = "00752217643114/#";//订阅所有
    private static final String clientid = String.valueOf(System.currentTimeMillis());;
    private MqttClient client;
    private MqttConnectOptions options;
    private String userName = "admin";
    private String passWord = "password";
    private ScheduledExecutorService scheduler;
    public void start() {
        logger.info("启动监听mqtt-start");
        try {
            // host为主机名，clientid即连接MQTT的客户端ID，一般以唯一标识符表示，MemoryPersistence设置clientid的保存形式，默认为以内存保存
            client = new MqttClient(HOST, clientid, new MemoryPersistence());
            // MQTT的连接设置
            options = new MqttConnectOptions();
            // 设置是否清空session,这里如果设置为false表示服务器会保留客户端的连接记录，这里设置为true表示每次连接到服务器都以新的身份连接
            options.setCleanSession(true);
            // 设置连接的用户名
            options.setUserName(userName);
            // 设置连接的密码
            options.setPassword(passWord.toCharArray());
            // 设置超时时间 单位为秒
            options.setConnectionTimeout(10);
            options.setAutomaticReconnect(true);//设置自动重连
            // 设置会话心跳时间 单位为秒 服务器会每隔1.5*20秒的时间向客户端发送个消息判断客户端是否在线，但这个方法并没有重连的机制
            options.setKeepAliveInterval(20);
            // 设置回调
            client.setCallback(new MqttCallback(){
                @Override
                public void connectionLost(Throwable throwable) {
                    // 连接丢失后，一般在这里面进行重连
                    throwable.printStackTrace();
                    logger.info("连接断开，可以做重连");
                }
                @Override
                public void messageArrived(String s, MqttMessage message) throws Exception {
                    // subscribe后得到的消息会执行到这里面
                    logger.info("接收消息主题 : " + TOPIC);
                    logger.info("接收消息Qos : " + message.getQos());
                    logger.info("接收消息内容 : " + new String(message.getPayload()));
                }
                @Override
                public void deliveryComplete(IMqttDeliveryToken token) {
                    logger.info("deliveryComplete---------" + token.isComplete());
                }
            });
//            MqttTopic topic = client.getTopic(TOPIC);
            //setWill方法，如果项目中需要知道客户端是否掉线可以调用该方法。设置最终端口的通知消息
//            options.setWill(topic, "close".getBytes(), 2, true);
            client.connect(options);
            //订阅消息
            int[] Qos  = {1};
            String[] topic1 = {TOPIC};
            client.subscribe(topic1, Qos);
/*            // 创建消息
            String payload = "{\n" +
                    "  \"token\": 0,\n" +
                    "  \"dev_type\": \"gw\", \n" +
                    "  \"msg_type\": \"online\", \n" +
                    "  \"content\" :[{\n" +
                    "    \"action\": \"getlist\"\n" +
                    "  }]\n" +
                    "}\n";
            MqttMessage message = new MqttMessage(payload.getBytes());
            // 设置消息的服务质量
            message.setQos(0);
            // 发布消息
            client.publish(TOPIC1, message);*/
        } catch (Exception e) {
            e.printStackTrace();
        }
        logger.info("启动监听mqtt-end");
    }
//    public static void main(String[] args) throws MqttException {
//        MQTTClientUtil client = new MQTTClientUtil();
//        client.start();
//        logger.info("启动监听mqtt");
//    }
}