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springboot集成mqtt超级详细步骤

作者:想要一百块

这篇文章主要介绍了springboot集成mqtt超级详细步骤,本文分步骤结合实例代码给大家介绍的非常详细,对大家的学习或工作具有一定的参考借鉴价值,需要的朋友可以参考下

springboot集成MQTT步骤

1. 引入pom依赖

   <!-- mqtt -->
    <dependency>
        <groupId>org.springframework.integration</groupId>
        <artifactId>spring-integration-mqtt</artifactId>
    </dependency>

2. application.yml

## MQTT##
mqtt:
    host: tcp://192.168.10.198:1883
    userName: root
    passWord: 123456
    qos: 1
    clientId: ClientId_local #ClientId_local必须唯一 比如你已经定了叫ABC  那你就一直叫ABC  其他地方就不要使用ABC了
    timeout: 10
    keepalive: 20
    topic1: A/pick/warn/#  #符号是代表整个warn下面的全部子主题 没有理解的话 可以百度仔细理解一下
    topic2: A/cmd/resp
    topic3: ABCF
    topic4: ABCH

application.properties

## MQTT##
mqtt.host=tcp://192.168.10.198:1883
mqtt.clientId=ClientId_local
mqtt.username=admin
mqtt.password=123456
mqtt.timeout=10
mqtt.keepalive=20
mqtt.topic1=A/pick/warn/#

3. MqttConfiguration.java

import org.eclipse.paho.client.mqttv3.MqttException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
/**
 1. @author WXY
 2. @date 2022/6/29 20:42
 */
@Configuration
public class MqttConfiguration {
    private static final Logger log = LoggerFactory.getLogger(MqttConfiguration.class);
    @Value("${mqtt.host}")
    String host;
    @Value("${mqtt.username}")
    String username;
    @Value("${mqtt.password}")
    String password;
    @Value("${mqtt.clientId}")
    String clientId;
    @Value("${mqtt.timeout}")
    int timeOut;
    @Value("${mqtt.keepalive}")
    int keepAlive;
    @Value("${mqtt.topic1}")
    String topic1;
    @Value("${mqtt.topic2}")
    String topic2;
    @Value("${mqtt.topic3}")
    String topic3;
    @Value("${mqtt.topic4}")
    String topic4;
    @Bean//注入spring
    public MyMQTTClient myMQTTClient() {
        MyMQTTClient myMQTTClient = new MyMQTTClient(host, username, password, clientId, timeOut, keepAlive);
        for (int i = 0; i < 10; i++) {
            try {
                myMQTTClient.connect();
                //不同的主题
             //   myMQTTClient.subscribe(topic1, 1);
             //   myMQTTClient.subscribe(topic2, 1);
             //   myMQTTClient.subscribe(topic3, 1);
             //   myMQTTClient.subscribe(topic4, 1);
                return myMQTTClient;
            } catch (MqttException e) {
                log.error("MQTT connect exception,connect time = " + i);
                try {
                    Thread.sleep(2000);
                } catch (InterruptedException e1) {
                    e1.printStackTrace();
                }
            }
        }
        return myMQTTClient;
    }
     public String getTopic1() {
        return topic1;
    }
    public void setTopic1(String topic1) {
        this.topic1 = topic1;
    }
    public String getTopic2() {
        return topic2;
    }
    public void setTopic2(String topic2) {
        this.topic2 = topic2;
    }
    public String getTopic3() {
        return topic3;
    }
    public void setTopic3(String topic3) {
        this.topic3 = topic3;
    }
    public String getTopic4() {
        return topic4;
    }
    public void setTopic4(String topic4) {
        this.topic4 = topic4;
    }
}

4. MyMQTTClient.java

import org.eclipse.paho.client.mqttv3.*;
import org.eclipse.paho.client.mqttv3.persist.MemoryPersistence;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
 1. @author WXY
 2. @date 2022/6/29 20:43
 */
public class MyMQTTClient {
    private static final Logger LOGGER = LoggerFactory.getLogger(MyMQTTClient.class);
    private static MqttClient client;
    private String host;
    private String username;
    private String password;
    private String clientId;
    private int timeout;
    private int keepalive;
    public MyMQTTClient(String host, String username, String password, String clientId, int timeOut, int keepAlive) {
        this.host = host;
        this.username = username;
        this.password = password;
        this.clientId = clientId;
        this.timeout = timeOut;
        this.keepalive = keepAlive;
    }
    public static MqttClient getClient() {
        return client;
    }
    public static void setClient(MqttClient client) {
        MyMQTTClient.client = client;
    }
    /**
     * 设置mqtt连接参数
     *
     * @param username
     * @param password
     * @param timeout
     * @param keepalive
     * @return
     */
    public MqttConnectOptions setMqttConnectOptions(String username, String password, int timeout, int keepalive) {
        MqttConnectOptions options = new MqttConnectOptions();
        options.setUserName(username);
        options.setPassword(password.toCharArray());
        options.setConnectionTimeout(timeout);
        options.setKeepAliveInterval(keepalive);
        options.setCleanSession(true);
        options.setAutomaticReconnect(true);
        return options;
    }
    /**
     * 连接mqtt服务端,得到MqttClient连接对象
     */
    public void connect() throws MqttException {
        if (client == null) {
            client = new MqttClient(host, clientId, new MemoryPersistence());
            client.setCallback(new MyMQTTCallback(MyMQTTClient.this));
        }
        MqttConnectOptions mqttConnectOptions = setMqttConnectOptions(username, password, timeout, keepalive);
        if (!client.isConnected()) {
            client.connect(mqttConnectOptions);
        } else {
            client.disconnect();
            client.connect(mqttConnectOptions);
        }
        LOGGER.info("MQTT connect success");//未发生异常,则连接成功
    }
    /**
     * 发布,默认qos为0,非持久化
     *
     * @param pushMessage
     * @param topic
     */
    public void publish(String pushMessage, String topic) {
        publish(pushMessage, topic, 0, false);
    }
    /**
     * 发布消息
     *
     * @param pushMessage
     * @param topic
     * @param qos
     * @param retained:留存
     */
    public void publish(String pushMessage, String topic, int qos, boolean retained) {
        MqttMessage message = new MqttMessage();
        message.setPayload(pushMessage.getBytes());
        message.setQos(qos);
        message.setRetained(retained);
        MqttTopic mqttTopic = MyMQTTClient.getClient().getTopic(topic);
        if (null == mqttTopic) {
            LOGGER.error("topic is not exist");
        }
        MqttDeliveryToken token;//Delivery:配送
        synchronized (this) {//注意:这里一定要同步,否则,在多线程publish的情况下,线程会发生死锁,分析见文章最后补充
            try {
                token = mqttTopic.publish(message);//也是发送到执行队列中,等待执行线程执行,将消息发送到消息中间件
                token.waitForCompletion(1000L);
            } catch (MqttPersistenceException e) {
                e.printStackTrace();
            } catch (MqttException e) {
                e.printStackTrace();
            }
        }
    }
    /**
     * 订阅某个主题
     *
     * @param topic
     * @param qos
     */
    public void subscribe(String topic, int qos) {
        try {
            MyMQTTClient.getClient().subscribe(topic, qos);
        } catch (MqttException e) {
            e.printStackTrace();
        }
    }
    /**
     * 取消订阅主题
     *
     * @param topic 主题名称
     */
    public void cleanTopic(String topic) {
        if (client != null && client.isConnected()) {
            try {
                client.unsubscribe(topic);
            } catch (MqttException e) {
                e.printStackTrace();
            }
        } else {
            System.out.println("取消订阅失败!");
        }
    }
}

5. MyMQTTCallback.java

import cn.hutool.core.util.CharsetUtil;
import com.alibaba.fastjson.JSON;
import org.eclipse.paho.client.mqttv3.IMqttDeliveryToken;
import org.eclipse.paho.client.mqttv3.MqttCallback;
import org.eclipse.paho.client.mqttv3.MqttException;
import org.eclipse.paho.client.mqttv3.MqttMessage;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.Map;
/**
 * @author WXY
 * @date 2022/6/29 20:43
 */
public class MyMQTTCallback implements MqttCallbackExtended {
    //手动注入
    private MqttConfiguration mqttConfiguration = SpringUtils.getBean(MqttConfiguration.class);
    private static final Logger log = LoggerFactory.getLogger(MyMQTTCallback.class);
    private MyMQTTClient myMQTTClient;
    public MyMQTTCallback(MyMQTTClient myMQTTClient) {
        this.myMQTTClient = myMQTTClient;
    }
   /**
     * 丢失连接,可在这里做重连
     * 只会调用一次
     *
     * @param throwable
     */
    @Override
    public void connectionLost(Throwable throwable) {
        log.error("mqtt connectionLost 连接断开,5S之后尝试重连: {}", throwable.getMessage());
        long reconnectTimes = 1;
        while (true) {
            try {
                if (MyMQTTClient.getClient().isConnected()) {
                    //判断已经重新连接成功  需要重新订阅主题 可以在这个if里面订阅主题  或者 connectComplete(方法里面)  看你们自己选择
                    log.warn("mqtt reconnect success end  重新连接  重新订阅成功");
                    return;
                }
                reconnectTimes+=1;
                log.warn("mqtt reconnect times = {} try again...  mqtt重新连接时间 {}", reconnectTimes, reconnectTimes);
                MyMQTTClient.getClient().reconnect();
            } catch (MqttException e) {
                log.error("mqtt断连异常", e);
            }
            try {
                Thread.sleep(5000);
            } catch (InterruptedException e1) {
            }
        }
    }
    /**
     * @param topic
     * @param mqttMessage
     * @throws Exception
     * subscribe后得到的消息会执行到这里面
     */
    @Override
    public void messageArrived(String topic, MqttMessage mqttMessage) throws Exception {
        log.info("接收消息主题 : {},接收消息内容 : {}", topic, new String(mqttMessage.getPayload()));
        //发布消息主题
        if (topic.equals("embed/resp")){
            Map maps = (Map) JSON.parse(new String(mqttMessage.getPayload(), CharsetUtil.UTF_8));
            //你自己的业务接口
            insertCmdResults(maps);
        }
        //接收报警主题
        if (topic.equals("embed/warn")){
            Map maps = (Map) JSON.parse(new String(mqttMessage.getPayload(), CharsetUtil.UTF_8));
            //你自己的业务接口
            insertPushAlarm(maps);
        }
    }
     /**
     *连接成功后的回调 可以在这个方法执行 订阅主题  生成Bean的 MqttConfiguration方法中订阅主题 出现bug 
     *重新连接后  主题也需要再次订阅  将重新订阅主题放在连接成功后的回调 比较合理
     * @param reconnect
     * @param serverURI
     */
    @Override
    public  void  connectComplete(boolean reconnect,String serverURI){
        log.info("MQTT 连接成功,连接方式:{}",reconnect?"重连":"直连");
        //订阅主题
        myMQTTClient.subscribe(mqttConfiguration.topic1, 1);
        myMQTTClient.subscribe(mqttConfiguration.topic2, 1);
        myMQTTClient.subscribe(mqttConfiguration.topic3, 1);
        myMQTTClient.subscribe(mqttConfiguration.topic4, 1);
    }
    /**
     * 消息到达后
     * subscribe后,执行的回调函数
     *
     * @param s
     * @param mqttMessage
     * @throws Exception
     */
    /**
     * publish后,配送完成后回调的方法
     *
     * @param iMqttDeliveryToken
     */
    @Override
    public void deliveryComplete(IMqttDeliveryToken iMqttDeliveryToken) {
        log.info("==========deliveryComplete={}==========", iMqttDeliveryToken.isComplete());
    }
  }

6. MqttMsg.java

/**
 * @author WXY
 * @date 2022/6/29 20:44
 */
public class MqttMsg {
    private String name = "";
    private String content = "";
    private String time = "";
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getContent() {
        return content;
    }
    public void setContent(String content) {
        this.content = content;
    }
    public String getTime() {
        return time;
    }
    public void setTime(String time) {
        this.time = time;
    }
    @Override
    public String toString() {
        return "MqttMsg{" +
                "name='" + name + '\'' +
                ", content='" + content + '\'' +
                ", time='" + time + '\'' +
                '}';
    }
}

7. MqttController.java

import com.gjwl.common.core.mqtt.MqttMsg;
import com.gjwl.common.core.mqtt.MyMQTTClient;
import net.sf.json.JSONObject;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.LinkedList;
import java.util.Queue;
/**
 * @author WXY
 * @date 2022/6/29 20:44
 */
@RestController
@RequestMapping("/sun/mqtt")
public class MqttController {
    @Autowired
    private MyMQTTClient myMQTTClient;
    @Value("${mqtt.topic1}")
    String topic1;
    @Value("${mqtt.topic2}")
    String topic2;
    @Value("${mqtt.topic3}")
    String topic3;
    @Value("${mqtt.topic4}")
    String topic4;
    Queue<String> msgQueue = new LinkedList<>();
    int count = 1;
    @PostMapping("/getMsg")
    @ResponseBody
    public synchronized void mqttMsg(MqttMsg mqttMsg) {
        System.out.println("队列元素数量:" + msgQueue.size());
        System.out.println("***************" + mqttMsg.getName() + ":" + mqttMsg.getContent() + "****************");
        //时间格式化
        SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        String time = df.format(new Date());
        mqttMsg.setTime(time);
        mqttMsg.setContent(mqttMsg.getContent() + "——后台编号:" + count);
        count++;
        //map转json
        JSONObject json = JSONObject.fromObject(mqttMsg);
        String sendMsg = json.toString();
        System.out.println(sendMsg);
        //队列添加元素
        boolean flag = msgQueue.offer(sendMsg);
        if (flag) {
            //发布消息  topic2 是你要发送到那个通道里面的主题 比如我要发送到topic2主题消息
            myMQTTClient.publish(msgQueue.poll(), topic2);
            System.out.println("时间戳" + System.currentTimeMillis());
        }
        System.out.println("队列元素数量:" + msgQueue.size());
    }
}

8.SpringUtils.java

import org.springframework.aop.framework.AopContext;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.NoSuchBeanDefinitionException;
import org.springframework.beans.factory.config.BeanFactoryPostProcessor;
import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;
import com.gjwl.common.utils.StringUtils;
/**
 * spring工具类 方便在非spring管理环境中获取bean
 * 
 * @author wxy
 */
@Component
public final class SpringUtils implements BeanFactoryPostProcessor, ApplicationContextAware 
{
    /** Spring应用上下文环境 */
    private static ConfigurableListableBeanFactory beanFactory;
    private static ApplicationContext applicationContext;
    @Override
    public void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory) throws BeansException 
    {
        SpringUtils.beanFactory = beanFactory;
    }
    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException 
    {
        SpringUtils.applicationContext = applicationContext;
    }
    /**
     * 获取对象
     *
     * @param name
     * @return Object 一个以所给名字注册的bean的实例
     * @throws org.springframework.beans.BeansException
     *
     */
    @SuppressWarnings("unchecked")
    public static <T> T getBean(String name) throws BeansException
    {
        return (T) beanFactory.getBean(name);
    }
    /**
     * 获取类型为requiredType的对象
     *
     * @param clz
     * @return
     * @throws org.springframework.beans.BeansException
     *
     */
    public static <T> T getBean(Class<T> clz) throws BeansException
    {
        T result = (T) beanFactory.getBean(clz);
        return result;
    }
    /**
     * 如果BeanFactory包含一个与所给名称匹配的bean定义,则返回true
     *
     * @param name
     * @return boolean
     */
    public static boolean containsBean(String name)
    {
        return beanFactory.containsBean(name);
    }
    /**
     * 判断以给定名字注册的bean定义是一个singleton还是一个prototype。 如果与给定名字相应的bean定义没有被找到,将会抛出一个异常(NoSuchBeanDefinitionException)
     *
     * @param name
     * @return boolean
     * @throws org.springframework.beans.factory.NoSuchBeanDefinitionException
     *
     */
    public static boolean isSingleton(String name) throws NoSuchBeanDefinitionException
    {
        return beanFactory.isSingleton(name);
    }
    /**
     * @param name
     * @return Class 注册对象的类型
     * @throws org.springframework.beans.factory.NoSuchBeanDefinitionException
     *
     */
    public static Class<?> getType(String name) throws NoSuchBeanDefinitionException
    {
        return beanFactory.getType(name);
    }
    /**
     * 如果给定的bean名字在bean定义中有别名,则返回这些别名
     *
     * @param name
     * @return
     * @throws org.springframework.beans.factory.NoSuchBeanDefinitionException
     *
     */
    public static String[] getAliases(String name) throws NoSuchBeanDefinitionException
    {
        return beanFactory.getAliases(name);
    }
    /**
     * 获取aop代理对象
     * 
     * @param invoker
     * @return
     */
    @SuppressWarnings("unchecked")
    public static <T> T getAopProxy(T invoker)
    {
        return (T) AopContext.currentProxy();
    }
    /**
     * 获取当前的环境配置,无配置返回null
     *
     * @return 当前的环境配置
     */
    public static String[] getActiveProfiles()
    {
        return applicationContext.getEnvironment().getActiveProfiles();
    }
    /**
     * 获取当前的环境配置,当有多个环境配置时,只获取第一个
     *
     * @return 当前的环境配置
     */
    public static String getActiveProfile()
    {
        final String[] activeProfiles = getActiveProfiles();
        return StringUtils.isNotEmpty(activeProfiles) ? activeProfiles[0] : null;
    }
}

9.测试

发送和接收 springboot后台日志

到此这篇关于springboot集成mqtt(超级无敌详细)的文章就介绍到这了,更多相关springboot集成mqtt内容请搜索脚本之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持脚本之家!

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