springboot整合RabbitMQ Mqtt

第一，pom配置，我们需要引入相关jar：

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

第二，配置MQTT服务器基本信息，在springBoot配置文件application.properties中配置，添加如下：

#XML格式配置
#MQTT配置信息
#MQTT-用户名
spring.mqtt.username=admin
#MQTT-密码
spring.mqtt.password=password
#MQTT-服务器连接地址，如果有多个，用逗号隔开，如：tcp://127.0.0.1:61613，tcp://192.168.2.133:61613
spring.mqtt.url=tcp://127.0.0.1:61613
#MQTT-连接服务器默认客户端ID
spring.mqtt.client.id=mqttId
#MQTT-默认的消息推送主题，实际可在调用接口时指定
spring.mqtt.default.topic=topic

#YML格式配置
mqtt:
    username: wisx
    password: wisx
    url: tcp://localhost:1883
    client:
      id: mqttId555
    default:
      topic: topic22
    completionTimeout: 10000

第三，配置MQTT消息推送配置类，

@Configuration
@IntegrationComponentScan
public class MqttSenderConfig {
 
    @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.default.topic}")
    private String defaultTopic;
 
    @Bean
    public MqttConnectOptions getMqttConnectOptions(){
        MqttConnectOptions mqttConnectOptions=new MqttConnectOptions();
        mqttConnectOptions.setUserName(username);
        mqttConnectOptions.setPassword(password.toCharArray());
        mqttConnectOptions.setServerURIs(new String[]{hostUrl});
        mqttConnectOptions.setKeepAliveInterval(2);
        return mqttConnectOptions;
    }
    @Bean
    public MqttPahoClientFactory mqttClientFactory() {
        DefaultMqttPahoClientFactory factory = new DefaultMqttPahoClientFactory();
        factory.setConnectionOptions(getMqttConnectOptions());
        return factory;
    }
    @Bean
    @ServiceActivator(inputChannel = "mqttOutboundChannel")
    public MessageHandler mqttOutbound() {
        MqttPahoMessageHandler messageHandler =  new MqttPahoMessageHandler(clientId, mqttClientFactory());
        messageHandler.setAsync(true);
        messageHandler.setDefaultTopic(defaultTopic);
        return messageHandler;
    }
    @Bean
    public MessageChannel mqttOutboundChannel() {
        return new DirectChannel();
    }
}

第四，配置MqttGateway消息推送接口类，在sendToMqtt(String data,@Header(MqttHeaders.TOPIC)String topic)接口中，data为发送的消息内容，topic为主题。指定topic，则我们的接口可以根据需要，向不同的主题发送消息，方便灵活应用。如果不指定，则使用默认配置的主题。

@Component
@MessagingGateway(defaultRequestChannel = "mqttOutboundChannel")
public interface MqttGateway {
    void sendToMqtt(String data, @Header(MqttHeaders.TOPIC) String topic);
}

第五，接口类测试下功能，用Postman调用sendMqtt.do接口，往hello主题发送消息，用MQTTLens订阅hello主题，从下面截图，可以看出可以正常往MQTT服务发送消息了，而且可以订阅到。

@RestController
@RequestMapping("/test")
public class TestController {
 
    @Autowired
    private MqttGateway mqttGateway;
 
    @RequestMapping("/sendMqtt.do")
    public String sendMqtt(String  sendData){
        mqttGateway.sendToMqtt(sendData,"hello");
        return "OK";
    }
}

image.png
image.png
参考转载自：https://blog.csdn.net/qq_41018959/article/details/80592444
第六，接收配置类

@Configuration
@IntegrationComponentScan
@Slf4j
public class MqttReceiveConfig {

    @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.default.topic}")
    private String defaultTopic;

    @Value("${spring.mqtt.completionTimeout}")
    private int completionTimeout ;   //连接超时

    @Autowired
    AlarmService alarmService;

    @Autowired
    private MongoTemplate mongoTemplate;

    SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss zzz");

    @Bean
    public MqttConnectOptions getMqttConnectOptions(){
        // MQTT的连接设置
        MqttConnectOptions mqttConnectOptions=new MqttConnectOptions();
        // 设置连接的用户名
        mqttConnectOptions.setUserName(username);
        // 设置连接的密码
        mqttConnectOptions.setPassword(password.toCharArray());
        // 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，
        // 把配置里的 cleanSession 设为false，客户端掉线后 服务器端不会清除session，
        // 当重连后可以接收之前订阅主题的消息。当客户端上线后会接受到它离线的这段时间的消息
        mqttConnectOptions.setCleanSession(false);
        // 设置发布端地址
        mqttConnectOptions.setServerURIs(new String[]{hostUrl});
        // 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
        mqttConnectOptions.setKeepAliveInterval(20);
        return mqttConnectOptions;
    }
    @Bean
    public MqttPahoClientFactory mqttClientFactory() {
        DefaultMqttPahoClientFactory factory = new DefaultMqttPahoClientFactory();
        factory.setConnectionOptions(getMqttConnectOptions());
        return factory;
    }

    //接收通道
    @Bean
    public MessageChannel mqttInputChannel() {
        return new DirectChannel();
    }

    //配置client,监听的topic
    @Bean
    public MessageProducer inbound() {
        MqttPahoMessageDrivenChannelAdapter adapter =
                new MqttPahoMessageDrivenChannelAdapter(clientId+"_inbound", mqttClientFactory(),
                        "elevators/cms/#"//加上这个为了匹配node red的topic
                );
        adapter.setCompletionTimeout(completionTimeout);
        adapter.setConverter(new DefaultPahoMessageConverter());
        adapter.setQos(1);
        adapter.setOutputChannel(mqttInputChannel());
        return adapter;
    }

    private String getCollectionName(String messageType){
        if("report".equals(messageType)){
            return "alarm";
        }
        if("singleRide".equals(messageType)){
            return "singleride";
        }
        if("statisticsDaily".equals(messageType)
                ||"statisticsSingleRide".equals(messageType)){
            return "statistics";
        }
        if("statisticsElevator".equals(messageType)){
            return "kpis";
        }
        return "othertype";
    }

    //通过通道获取数据
    @Bean
    @ServiceActivator(inputChannel = "mqttInputChannel")
    public MessageHandler handler() {
        return new MessageHandler() {
            @Override
            public void handleMessage(Message<?> message) throws MessagingException {
                String topic = message.getHeaders().get("mqtt_receivedTopic").toString();
            }
        }
    }
}