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
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