mqtt 集成

-- 在pom.xml导入依赖

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

　　

-- 在application.yml添加配置

spring:
#MQTT配置信息
  mqtt:
    username: bywmqtt
    password: RuizxZWrqNBmgk1h7yd4
    #MQTT-服务器连接地址，如果有多个，用逗号隔开 tcp://39.108.67.63:1883
    url: tcp://39.108.67.63:1883
    client:
      id: test001
    default:
      topic: topicTest01
    completionTimeout: 3000

-- 配置消息通道，连接，监听主题 

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.core.MessageProducer;
import org.springframework.integration.mqtt.core.DefaultMqttPahoClientFactory;
import org.springframework.integration.mqtt.core.MqttPahoClientFactory;
import org.springframework.integration.mqtt.inbound.MqttPahoMessageDrivenChannelAdapter;
import org.springframework.integration.mqtt.outbound.MqttPahoMessageHandler;
import org.springframework.integration.mqtt.support.DefaultPahoMessageConverter;
import org.springframework.messaging.Message;
import org.springframework.messaging.MessageChannel;
import org.springframework.messaging.MessageHandler;
import org.springframework.messaging.MessagingException;

import lombok.extern.slf4j.Slf4j;

/**
 * mqtt配置
 */
@Configuration
@IntegrationComponentScan
@Slf4j
public class MqttServerConfig {
	
	public static final String OUT_BOUND_CHANNEL = "mqttOutboundChannel";
	public static final String INPUT_CHANNEL = "mqttInputChannel";
	public static final String RECEIVE_TOPIC = "mqtt_receivedTopic";
	public static final String TOPIC_1 = "TOPIC_1";
	public static final String TOPIC_2 = "TOPIC_2";
	public static final String[] SUB_TOPIC = {TOPIC_1, TOPIC_2};
	
    @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 serviceId;
    @Value("${spring.mqtt.default.topic:}")
    private String defaultTopic;
    @Value("${spring.mqtt.completionTimeout:}")
    private int completionTimeout ;   //连接超时

    @Bean
    public MqttConnectOptions getMqttConnectOptions() {
        MqttConnectOptions mqttConnectOptions = new MqttConnectOptions();
        mqttConnectOptions.setUserName(username);
        mqttConnectOptions.setPassword(password.toCharArray());
        mqttConnectOptions.setServerURIs(new String[]{hostUrl});
        //心跳
        mqttConnectOptions.setKeepAliveInterval(20);
        //连接超时
        mqttConnectOptions.setConnectionTimeout(30);
        return mqttConnectOptions;
    }

    @Bean
    public MqttPahoClientFactory mqttClientFactory() {
        DefaultMqttPahoClientFactory factory = new DefaultMqttPahoClientFactory();
        factory.setConnectionOptions(getMqttConnectOptions());
        return factory;
    }

    @Bean
    @ServiceActivator(inputChannel = OUT_BOUND_CHANNEL)
    public MessageHandler mqttOutbound() {
        MqttPahoMessageHandler messageHandler = new MqttPahoMessageHandler(serviceId, mqttClientFactory());
        messageHandler.setAsync(true);
        messageHandler.setDefaultTopic(defaultTopic);
        //消息是否永久保留
        messageHandler.setDefaultRetained(true);
        //消息发布服务质量
        messageHandler.setDefaultQos(1);
        return messageHandler;
    }

    @Bean
    public MessageChannel mqttOutboundChannel() {
        return new DirectChannel();
    }
    
    //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(serviceId+"_inbound", mqttClientFactory(), SUB_TOPIC);
        adapter.setCompletionTimeout(completionTimeout);
        adapter.setConverter(new DefaultPahoMessageConverter());
        adapter.setQos(1);
        adapter.setOutputChannel(mqttInputChannel());
        return adapter;
    }
    
    //通过通道获取数据
    @Bean
    @ServiceActivator(inputChannel = INPUT_CHANNEL)
    public MessageHandler handler() {
        return new MessageHandler() {
            @Override
            public void handleMessage(Message<?> message) throws MessagingException {
                String topic = message.getHeaders().get(RECEIVE_TOPIC).toString();
                log.info("[{}]主题接收到消息:{}", topic, message.getPayload().toString());
            }
        };
    }
    
}

-- 发送消息

@Autowired
	private MqttGateway mqttGateway;
	
	@RequestMapping("/sendMqtt")
	public ReturnResult sendMqtt(String topic, String  sendData){
		// 默认主题发送
		mqttGateway.sendToMqtt(sendData);
		// 指定主题推送
		mqttGateway.sendToMqtt(topic, sendData);
		return ResultBuild.success();
	}