关于springboot:spring-boot集成mqtt协议发送和订阅数据

maven的pom.xml引入包

        <!--mqtt-->        <dependency>            <groupId>org.springframework.boot</groupId>            <artifactId>spring-boot-starter-integration</artifactId>            <version>2.3.6.RELEASE</version>        </dependency>        <dependency>            <groupId>org.springframework.integration</groupId>            <artifactId>spring-integration-stream</artifactId>            <version>5.3.4.RELEASE</version>        </dependency>        <dependency>            <groupId>org.springframework.integration</groupId>            <artifactId>spring-integration-mqtt</artifactId>            <version>5.3.4.RELEASE</version>        </dependency>

mqtt.yml配置文件

spring:  mqtt:    username: admin    password: beyond_2021    url: tcp://192.168.3.100:1883    client-id: data-clientId    server-id: data-serverId    data-topic: data/#    will-topic: data-will    will-content: data server offline    completion-timeout: 10000

初始化MQTT配置bean

package com.beyond.config;import org.eclipse.paho.client.mqttv3.MqttConnectOptions;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;import org.springframework.context.event.EventListener;import org.springframework.integration.annotation.IntegrationComponentScan;import org.springframework.integration.annotation.ServiceActivator;import org.springframework.integration.channel.DirectChannel;import org.springframework.integration.core.MessageProducer;import org.springframework.integration.mqtt.core.DefaultMqttPahoClientFactory;import org.springframework.integration.mqtt.core.MqttPahoClientFactory;import org.springframework.integration.mqtt.event.MqttConnectionFailedEvent;import org.springframework.integration.mqtt.event.MqttMessageDeliveredEvent;import org.springframework.integration.mqtt.event.MqttMessageSentEvent;import org.springframework.integration.mqtt.event.MqttSubscribedEvent;import org.springframework.integration.mqtt.inbound.MqttPahoMessageDrivenChannelAdapter;import org.springframework.integration.mqtt.outbound.MqttPahoMessageHandler;import org.springframework.integration.mqtt.support.DefaultPahoMessageConverter;import org.springframework.integration.mqtt.support.MqttHeaders;import org.springframework.messaging.Message;import org.springframework.messaging.MessageChannel;import org.springframework.messaging.MessageHandler;import org.springframework.messaging.MessagingException;import java.security.SecureRandom;import java.util.Date;@Configuration@IntegrationComponentScanpublic class MqttConfig {    private static final Logger log = LoggerFactory.getLogger(MqttConfig.class);    @Value("${spring.mqtt.username}")    private String username;    @Value("${spring.mqtt.password}")    private String password;    @Value("${spring.mqtt.url}")    private String hostUrl;    @Value("${spring.mqtt.client-id}")    private String clientId;    @Value("${spring.mqtt.server-id}")    private String serverId;    @Value("${spring.mqtt.data-topic:data/#}")    private String dataTopic;    @Value("${spring.mqtt.will-topic}")    private String willTopic;    @Value("${spring.mqtt.will-content}")    private String willContent;    /**     * @desc 连贯超时     */    @Value("${spring.mqtt.completion-timeout}")    private int completionTimeout ;    @Bean    public MqttConnectOptions getMqttConnectOptions(){        // MQTT的连贯设置        MqttConnectOptions mqttConnectOptions = new MqttConnectOptions();        // 设置连贯的用户名        mqttConnectOptions.setUserName(username);        // 设置连贯的明码        mqttConnectOptions.setPassword(password.toCharArray());        // 设置是否清空session,这里如果设置为false示意服务器会保留客户端的连贯记录，        // 把配置里的 cleanSession 设为false，客户端掉线后 服务器端不会革除session，        // 当重连后能够接管之前订阅主题的音讯。当客户端上线后会承受到它离线的这段时间的音讯        mqttConnectOptions.setCleanSession(true);        // 设置公布端地址,多个用逗号分隔, 如:tcp://111:1883,tcp://222:1883        // 当第一个111连贯上后,222不会在连,如果111挂掉后,重试连111几次失败后,会主动去连贯222        mqttConnectOptions.setServerURIs(hostUrl.split(","));        // 设置会话心跳工夫 单位为秒 服务器会每隔1.5*20秒的工夫向客户端发送个音讯判断客户端是否在线，但这个办法并没有重连的机制        mqttConnectOptions.setKeepAliveInterval(20);        mqttConnectOptions.setAutomaticReconnect(true);        // 设置“遗嘱”音讯的话题，若客户端与服务器之间的连贯意外中断，服务器将公布客户端的“遗嘱”音讯。        mqttConnectOptions.setWill(willTopic, willContent.getBytes(), 2, false);        mqttConnectOptions.setMaxInflight(1000000);        return mqttConnectOptions;    }    @Bean    public MqttPahoClientFactory mqttClientFactory() {        DefaultMqttPahoClientFactory factory = new DefaultMqttPahoClientFactory();        factory.setConnectionOptions(getMqttConnectOptions());        return factory;    }    /**     * @desc 发送通道配置 默认主题     * @date 2021/3/16     */    @Bean    @ServiceActivator(inputChannel = "mqttOutboundChannel")    public MessageHandler mqttOutbound() {        //clientId每个连贯必须惟一,否则,两个雷同的clientId互相挤掉线        String clientIdStr = clientId + new SecureRandom().nextInt(10);        MqttPahoMessageHandler messageHandler = new MqttPahoMessageHandler(clientIdStr, mqttClientFactory());        //async如果为true，则调用方不会阻塞。而是在发送音讯时期待传递确认。默认值为false（发送将阻塞，直到确认发送)        messageHandler.setAsync(true);        messageHandler.setAsyncEvents(true);        messageHandler.setDefaultTopic(dataTopic);        messageHandler.setDefaultQos(1);        return messageHandler;    }    /**     * @desc 发送通道     * @date 2021/3/16     */    @Bean    public MessageChannel mqttOutboundChannel() {        return new DirectChannel();    }    /**     * @desc 接管通道     * @date 2021/3/16     */    @Bean    public MessageChannel mqttInputChannel() {        return new DirectChannel();    }    /**     * @desc 配置监听的 topic 反对通配符     * @date 2021/3/16     */    @Bean    public MessageProducer inbound() {        //clientId每个连贯必须惟一,否则,两个雷同的clientId互相挤掉线        String serverIdStr = serverId + new SecureRandom().nextInt(10);        MqttPahoMessageDrivenChannelAdapter adapter =                new MqttPahoMessageDrivenChannelAdapter(serverIdStr, mqttClientFactory(), dataTopic);        adapter.setCompletionTimeout(completionTimeout);        adapter.setConverter(new DefaultPahoMessageConverter());        adapter.setQos(1);        adapter.setOutputChannel(mqttInputChannel());        return adapter;    }    /**     * @desc 通过通道获取数据 订阅的数据     * @date 2021/3/16     */    @Bean    @ServiceActivator(inputChannel = "mqttInputChannel")    public MessageHandler handler() {        return new MessageHandler() {            @Override            public void handleMessage(Message<?> message) throws MessagingException {                String payload = message.getPayload().toString();                String topic = message.getHeaders().get(MqttHeaders.RECEIVED_TOPIC).toString();                //////////////////解决订阅topic:(data/#)到的所有的数据            }        };    }    /**     * @desc mqtt连贯失败或者订阅失败时,触发MqttConnectionFailedEvent事件     * @date 2021/7/22      *@param event     * @return void     */    @EventListener(MqttConnectionFailedEvent.class)    public void mqttConnectionFailedEvent(MqttConnectionFailedEvent event) {        log.error("mqttConnectionFailedEvent连贯mqtt失败: " +                "date={}, hostUrl={}, username={}, error={}",                new Date(), hostUrl, username, event.getCause().getMessage());    }    /**     * @desc 当async和async事件(async-events)都为true时,将收回MqttMessageSentEvent     * 它蕴含音讯、主题、客户端库生成的音讯id、clientId和clientInstance（每次连贯客户端时递增）     * @date 2021/7/22      *@param event     * @return void     */    @EventListener(MqttMessageSentEvent.class)    public void mqttMessageSentEvent(MqttMessageSentEvent event) {        log.info("mqttMessageSentEvent发送信息: date={}, info={}", new Date(), event.toString());    }    /**     * @desc 当async和async事件(async-events)都为true时,将收回MqttMessageDeliveredEvent     * 当客户端库确认传递时，将收回MqttMessageDeliveredEvent。它蕴含messageId、clientId和clientInstance，使传递与发送相干。     * @date 2021/7/22      *@param event     * @return void     */    @EventListener(MqttMessageDeliveredEvent.class)    public void mqttMessageDeliveredEvent(MqttMessageDeliveredEvent event) {        log.info("mqttMessageDeliveredEvent发送胜利信息: date={}, info={}", new Date(), event.toString());    }    /**     * @desc 胜利订阅到主题，MqttSubscribedEvent事件就会被触发(多个主题,屡次触发)     * @date 2021/7/22      *@param event     * @return void     */    @EventListener(MqttSubscribedEvent.class)    public void mqttSubscribedEvent(MqttSubscribedEvent event) {        log.info("mqttSubscribedEvent订阅胜利信息: date={}, info={}", new Date(), event.toString());    }}

mqtt发送数据网关配置

package com.beyond.data.component;import org.springframework.integration.annotation.MessagingGateway;import org.springframework.integration.mqtt.support.MqttHeaders;import org.springframework.messaging.handler.annotation.Header;import org.springframework.stereotype.Component;/** * @desc MQTT发送网关 * @date 2021/3/12 */@Component@MessagingGateway(defaultRequestChannel = "mqttOutboundChannel")public interface MqttGatewayComponent {    void sendToMqtt(String data);    void sendToMqtt(String payload, @Header(MqttHeaders.TOPIC) String topic);    void sendToMqtt(@Header(MqttHeaders.TOPIC) String topic, @Header(MqttHeaders.QOS) int qos, String payload);}

发送数据到mqtt伪代码

@Autowiredprivate MqttGatewayComponent mqttGatewayComponent;//发送字符串或json字符串,到指定的topicmqttGatewayComponent.sendToMqtt("json string", "data/abcd");

参考链接:
https://blog.csdn.net/sinat_2...
https://blog.csdn.net/qq_2946...
https://blog.csdn.net/myinser...