springboot 整个mqtt demo

demo 大致结构

 

首先pom

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

 

配置文件

#MQTT配置信息
#MQTT-用户名
spring.mqtt.username=admin
#MQTT-密码
spring.mqtt.password=public
#MQTT-服务器连接地址
spring.mqtt.url=tcp://127.0.0.1:1883
#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

 

package com.pwl.mqtt.mqtt.config;

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;

/**
 * MQTT发送消息配置
 *
 */
@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;
    }

    //ServiceActivator注解表明当前方法用于处理MQTT消息，inputChannel参数指定了用于接收消息信息的channel。
    @Bean
    @ServiceActivator(inputChannel = "mqttOutboundChannel")
    public MessageHandler mqttOutbound() {
        MqttPahoMessageHandler messageHandler =  new MqttPahoMessageHandler(clientId, mqttClientFactory());
        //如果设置成true，发送消息时将不会阻塞。
        messageHandler.setAsync(true);
        messageHandler.setDefaultTopic(defaultTopic);
        return messageHandler;
    }
    @Bean
    public MessageChannel mqttOutboundChannel() {
        return new DirectChannel();
    }
}

package com.pwl.mqtt.mqtt.config;

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

/**
 * @author Pan Weilong
 * @date 2020/7/23 10:31
 * @description: 接口.
 */
@MessagingGateway(defaultRequestChannel = "mqttOutboundChannel")
public interface MqttGateway {
    void sendToMqtt(String data,@Header(MqttHeaders.TOPIC) String topic);
}

controller

package com.pwl.mqtt.mqtt.controller;

import com.pwl.mqtt.mqtt.config.MqttGateway;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * @author Pan Weilong
 * @date 2020/7/23 10:32
 * @description: 接口.
 */
@RestController
@RequestMapping("/test")
public class TestController {

    @Autowired
    private MqttGateway mqttGateway;

    @GetMapping("/sendMqtt")
    public String sendMqtt(String  sendData){
        mqttGateway.sendToMqtt(sendData,"helloo/123456");
        return "OK";
    }
}

客户端订阅helloo/123456  地址

访问127.0.0.1:8080/test/sendMqtt?sendData=mqtt  推送消息

mqtt fx 已收到推送的消息(发送消息前要订阅helloo/123456 这个地址)