【SpringBoot集成MQTT实现消息推送】

	    
            org.springframework.integration
            spring-integration-mqtt
        

application.yml：

mqtt:
  username: admin
  password: admin
  url: tcp://127.0.0.1:1883
  client-id: clientid-dev
  completionTimeout: 3000

MqttSenderConfig

import org.eclipse.paho.client.mqttv3.MqttConnectOptions;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.integration.annotation.IntegrationComponentScan;
import org.springframework.integration.annotation.ServiceActivator;
import org.springframework.integration.channel.DirectChannel;
import org.springframework.integration.mqtt.core.DefaultMqttPahoClientFactory;
import org.springframework.integration.mqtt.core.MqttPahoClientFactory;
import org.springframework.integration.mqtt.outbound.MqttPahoMessageHandler;
import org.springframework.messaging.MessageChannel;
import org.springframework.messaging.MessageHandler;


@Configuration
@IntegrationComponentScan
public class MqttSenderConfig {
 
    @Value("${mqtt.username}")
    private String username;
 
    @Value("${mqtt.password}")
    private String password;
 
    @Value("${mqtt.url}")
    private String hostUrl;
 
    @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() {
        String clientId = "h-backend-mqtt-out-" + System.currentTimeMillis();
        MqttPahoMessageHandler messageHandler =  new MqttPahoMessageHandler(clientId, mqttClientFactory());
        messageHandler.setAsync(true);
        messageHandler.setDefaultQos(2);
        messageHandler.setDefaultTopic("/default/mqtt/topic/foo");
        return messageHandler;
    }
    @Bean
    public MessageChannel mqttOutboundChannel() {
        return new DirectChannel();
    }
}

MqttGateway

import org.springframework.integration.annotation.MessagingGateway;
import org.springframework.integration.mqtt.support.MqttHeaders;
import org.springframework.messaging.handler.annotation.Header;

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

测试

@Resource
private MqttGateway mqttMessageSender;

mqttMessageSender.sendToMqtt("/sys/ping/"+farmManageId,StringUtils.toJson(map));