Java简单实现订阅mqtt服务器主题数据

最新推荐文章于 2024-03-18 06:00:00 发布

20161201

最新推荐文章于 2024-03-18 06:00:00 发布

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本文链接：https://blog.youkuaiyun.com/weixin_43762012/article/details/109963279

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订阅mqtt服务器，实现从硬件获取当前数据

1.配置连接器

2.设置回调函数

连接类：订阅是一个单独的线程。要不然实现不了订阅的数据

package com.cuson.cusonmanager.util;


import java.util.concurrent.ScheduledExecutorService;

import org.eclipse.paho.client.mqttv3.MqttClient;
import org.eclipse.paho.client.mqttv3.MqttConnectOptions;
import org.eclipse.paho.client.mqttv3.MqttTopic;
import org.eclipse.paho.client.mqttv3.persist.MemoryPersistence;

/**
 * 模拟一个客户端接收消息
 *
 * @author Unclue_liu
 */
public class ClientMQTT {

    public static final String HOST = "tcp://localhost:1883";
    public static final String TOPIC1 = "pos_message_all";
    private static final String clientid = "12345678";
    private MqttClient client;
    private MqttConnectOptions options;
    private String userName = "mqtt";    //非必须
    private String passWord = "mqtt";  //非必须
    private ScheduledExecutorService scheduler;

    priv