springboot集成mqtt - Go语言中文社区

springboot集成mqtt

项目目录如下
在这里插入图片描述
启动类如下

import org.eclipse.paho.client.mqttv3.MqttException;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@EnableAutoConfiguration(exclude = {
        org.springframework.boot.autoconfigure.security.servlet.SecurityAutoConfiguration.class
})
@SpringBootApplication
public class MqttApplication {

    public static void main(String[] args) throws MqttException {
        SpringApplication.run(MqttApplication.class, args);
        //订阅主题，之后控制台打印消息。证明整合成功
       // MqttPushClient.getInstance().subscribe("topic1");
    }
}

MqttController

package com.example.mqtt.mqtt;

import org.eclipse.paho.client.mqttv3.MqttException;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;

/**
 * MQTT消息发送
 */
@RestController
public class MqttController {


    /**
     * 发送MQTT消息
     *
     * @param message 消息内容
     * @return 返回
     */

    @ResponseBody
    @GetMapping(value = "/mqtt")
    public ResponseEntity<String> sendMqtt(@RequestParam(value = "msg") String message) throws MqttException {
        String kdTopic = "topic1";
        MqttPushClient.getInstance().publish(kdTopic, "稍微来点鸡血");
        return new ResponseEntity<>("OK", HttpStatus.OK);
    }
}

MqttPushClient

import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.eclipse.paho.client.mqttv3.*;
import org.eclipse.paho.client.mqttv3.persist.MemoryPersistence;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;


@Slf4j
@Configuration
public class MqttPushClient {

    private String url = "tcp://127.0.0.1:61613";
    private String clientId = "mqttProducer";

    @Autowired
    MqttConfig config;
    private static final byte[] WILL_DATA;

    static {
        WILL_DATA = "offline".getBytes();
    }

    private static volatile MqttPushClient mqttPushClient = null;

    @Bean
    public static MqttPushClient getInstance() throws MqttException {

        if (null == mqttPushClient) {
            synchronized (MqttPushClient.class) {
                if (null == mqttPushClient) {
                    mqttPushClient = new MqttPushClient();
                }
            }

        }
        return mqttPushClient;
    }


    public MqttPushClient() throws MqttException {
        connect();
    }

    private MqttClient client;

    private void connect() throws MqttException {
        try {
            client = new MqttClient(url, clientId, new MemoryPersistence());
            MqttConnectOptions options = new MqttConnectOptions();
            // 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，
            // 这里设置为true表示每次连接到服务器都以新的身份连接
            options.setCleanSession(true);
            // 设置连接的用户名
            options.setUserName("admin");
            // 设置连接的密码
            options.setPassword("password".toCharArray());
            options.setServerURIs(StringUtils.split("tcp://127.0.0.1:61613", ","));
            // 设置超时时间 单位为秒
            options.setConnectionTimeout(100);
            // 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心跳判断客户端是否在线，但这个方法并没有重连的机制
            options.setKeepAliveInterval(20);
            // 设置“遗嘱”消息的话题，若客户端与服务器之间的连接意外中断，服务器将发布客户端的“遗嘱”消息。
            options.setWill("willTopic", WILL_DATA, 2, false);
            client.setCallback(new PushCallback());
            client.connect(options);
        } catch (MqttException e) {
            e.printStackTrace();
        }
    }

    /**
     * 发布，默认qos为0，非持久化
     *
     * @param topic
     * @param pushMessage
     */
    public void publish(String topic, String pushMessage) {
        publish(0, false, topic, pushMessage);
    }

    /**
     * 发布
     *
     * @param qos
     * @param retained
     * @param topic
     * @param pushMessage
     */
    public void publish(int qos, boolean retained, String topic, String pushMessage) {
        MqttMessage message = new MqttMessage();
        message.setQos(qos);
        message.setRetained(retained);
        message.setPayload(pushMessage.getBytes());
        MqttTopic mTopic = client.getTopic(topic);
        if (null == mTopic) {
            log.error("topic not exist");
        }
        MqttDeliveryToken token;
        try {
            token = mTopic.publish(message);
            token.waitForCompletion();
        } catch (MqttPersistenceException e) {
            e.printStackTrace();
        } catch (MqttException e) {
            e.printStackTrace();
        }
    }

    /**
     * 订阅某个主题，qos默认为0
     *
     * @param topic
     */
    public void subscribe(String topic) {
        subscribe(topic, 0);
    }

    /**
     * 订阅某个主题
     *
     * @param topic
     * @param qos
     */
    public void subscribe(String topic, int qos) {
        try {
            client.subscribe(topic, qos);
        } catch (MqttException e) {
            e.printStackTrace();
        }
    }

PushCallback

import org.eclipse.paho.client.mqttv3.IMqttDeliveryToken;
import org.eclipse.paho.client.mqttv3.MqttCallback;
import org.eclipse.paho.client.mqttv3.MqttException;
import org.eclipse.paho.client.mqttv3.MqttMessage;


public class PushCallback implements MqttCallback {
    @Override
    public void connectionLost(Throwable cause) {
        System.out.println("连接断开，可以做重连");
    }

    @Override
    public void messageArrived(String topic, MqttMessage message) throws Exception {
        System.out.println("接收消息主题 : " + topic);
        System.out.println("接收消息Qos : " + message.getQos());
        System.out.println("接收消息内容 : " + new String(message.getPayload()));

    }

    @Override
    public void deliveryComplete(IMqttDeliveryToken token) {
        System.out.println(token);
        try {
            System.out.println(token.getMessage());
        } catch (MqttException e) {
            e.printStackTrace();
        }
    }
}

pom

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.7.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.example</groupId>
    <artifactId>mqtt</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>mqtt</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!--mqtt 相关依赖-->
       <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>
        <!--<dependency>
            <groupId>org.eclipse.paho</groupId>
            <artifactId>org.eclipse.paho.client.mqttv3</artifactId>
            <version>1.2.0</version>
        </dependency>-->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.16.14</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.springframework.integration/spring-integration-jmx -->
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-jmx -->


        <!-- https://mvnrepository.com/artifact/org.apache.commons/commons-lang3 -->
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-lang3</artifactId>
            <version>3.0</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-security</artifactId>
        </dependency>

        <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-aop</artifactId>
    </dependency>
</dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>


package com.example.mqtt.mqtt;


import lombok.extern.slf4j.Slf4j;
import org.eclipse.paho.client.mqttv3.*;
import org.eclipse.paho.client.mqttv3.persist.MemoryPersistence;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;
import javax.annotation.PostConstruct;

@Slf4j
@Component
public class ReportMqtt implements MqttCallback {
    @Value("${mqtt.url}")
    public String HOST;
    @Value("${mqtt.consumer.defaultTopic}")
    public String TOPIC;
    @Value("${mqtt.username}")
    private String name;
    @Value("${mqtt.password}")
    private String passWord;

    private MqttClient client;
    private MqttConnectOptions options;

    //clientId不能重复所以这里我设置为系统时间
    String clientid = String.valueOf(System.currentTimeMillis());

    @PostConstruct
    public void result() {
        try {
            // host为主机名，clientid即连接MQTT的客户端ID，一般以唯一标识符表示，MemoryPersistence设置clientid的保存形式，默认为以内存保存
            client = new MqttClient(HOST, clientid, new MemoryPersistence());
            // MQTT的连接设置
            options = new MqttConnectOptions();
            // 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，这里设置为true表示每次连接到服务器都以新的身份连接
            options.setCleanSession(true);
            // 设置连接的用户名
            options.setUserName(name);
            // 设置连接的密码
            options.setPassword(passWord.toCharArray());
            // 设置超时时间 单位为秒
            options.setConnectionTimeout(10);
            // 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
            options.setKeepAliveInterval(3600);
            // 设置回调
            client.setCallback(this);
            client.connect(options);
            //订阅消息
            int[] Qos = {1};
            String[] topic1 = {TOPIC};
            client.subscribe(topic1, Qos);

        } catch (Exception e) {
            log.info("ReportMqtt客户端连接异常，异常信息：" + e);
        }

    }

    @Override
    public void connectionLost(Throwable throwable) {
        try {
            log.info("程序出现异常，DReportMqtt断线！正在重新连接...:");
            client.close();
            this.result();
            log.info("ReportMqtt重新连接成功");
        } catch (MqttException e) {
            log.info(e.getMessage());
        }
    }

    @Override
    public void messageArrived(String topic, MqttMessage message) {
        log.info("接收消息主题:" + topic);
        log.info("接收消息Qos:" + message.getQos());
        log.info("接收消息内容 :" + new String(message.getPayload()));

    }

    @Override
    public void deliveryComplete(IMqttDeliveryToken iMqttDeliveryToken) {
        log.info("消息发送成功");
    }
}

配置文件

# src/main/resources/config/mqtt.properties
##################
#  MQTT 配置
##################
# 用户名
mqtt.username=admin
# 密码
mqtt.password=password
# 推送信息的连接地址，如果有多个，用逗号隔开，如：tcp://127.0.0.1:61613,tcp://192.168.1.61:61613
mqtt.url=tcp://127.0.0.1:61613
##################
#  MQTT 生产者
# 连接服务器默认客户端ID
mqtt.producer.clientId=mqttProducer
# 默认的推送主题，实际可在调用接口时指定
mqtt.producer.defaultTopic=topic1
##################
#  MQTT 消费者
##################
# 连接服务器默认客户端ID
mqtt.consumer.clientId=mqttConsumer
# 默认的接收主题，可以订阅多个Topic，逗号分隔
mqtt.consumer.defaultTopic=topic1

运行截图
在这里插入图片描述

项目中遇到如下问题
在这里插入图片描述
加入spring权限jar包即可
mqtt后台地址
http://127.0.0.1:61680/console/index.html#
在这里插入图片描述
然后启动项目看下结果，是否有producer
访问项目url，地址如下 http://localhost:8080/mqtt?msg=“来点鸡血”
在这里插入图片描述
后续完善，许多漏洞。

版权声明：本文来源CSDN，感谢博主原创文章，遵循 CC 4.0 by-sa 版权协议，转载请附上原文出处链接和本声明。
原文链接：https://blog.csdn.net/yl_hahha/article/details/99246679
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  • 发表于 2020-04-18 17:51:21
  • 阅读 ( 823 )
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