10 Spring集成MQTT（生产者与消费者）

原创

阿甘兄_ 2021-07-07 10:39:45 ©著作权

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代码已上传至我的Github仓库：https://github.com/ylw-github/Spring-MQTT-Demo.git

整个代码的结构：
10 Spring集成MQTT（生产者与消费者）_qt

生产者（producer）

依赖：

<?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>com.ylw</groupId>
        <artifactId>spring-mqtt-demo</artifactId>
        <version>1.0-SNAPSHOT</version>
    </parent>

    <artifactId>producer</artifactId>

    <dependencies>
        <dependency>
            <groupId>org.springframework.integration</groupId>
            <artifactId>spring-integration-core</artifactId>
            <version>4.3.9.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.integration</groupId>
            <artifactId>spring-integration-mqtt</artifactId>
            <version>4.3.9.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.eclipse.paho</groupId>
            <artifactId>org.eclipse.paho.client.mqttv3</artifactId>
            <version>1.2.0</version>
        </dependency>

    </dependencies>

</project>

配置文件（mqtt_producer.xml）：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:int="http://www.springframework.org/schema/integration"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:int-mqtt="http://www.springframework.org/schema/integration/mqtt"
       xsi:schemaLocation="
        http://www.springframework.org/schema/integration http://www.springframework.org/schema/integration/spring-integration-4.1.xsd
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
        http://www.springframework.org/schema/integration/mqtt http://www.springframework.org/schema/integration/mqtt/spring-integration-mqtt-4.1.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context-4.1.xsd">

    <bean id="clientFactory"
          class="org.springframework.integration.mqtt.core.DefaultMqttPahoClientFactory">
        <property name="userName" value="user1"/>
        <property name="password" value="123456"/>
        <property name="serverURIs">
            <array>
                <value>tcp://127.0.0.1:1883</value>
            </array>
        </property>
    </bean>

    <bean id="mqtt" class="org.springframework.integration.mqtt.outbound.MqttPahoMessageHandler">
        <constructor-arg name="clientId" value="clientId_producer"></constructor-arg>
        <constructor-arg name="clientFactory" ref="clientFactory"></constructor-arg>
    </bean>

</beans>

单元测试类（ProducerTestUnit.java）：

package com.ylw;

import org.eclipse.paho.client.mqttv3.MqttConnectOptions;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.integration.mqtt.outbound.MqttPahoMessageHandler;
import org.springframework.integration.mqtt.support.MqttHeaders;
import org.springframework.integration.support.MessageBuilder;
import org.springframework.messaging.Message;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = "classpath:mqtt_producer.xml")
public class ProducerTestUnit {
    @Autowired
    private MqttPahoMessageHandler mqtt;

    @Test
    public void sendTextQueue() {
        sendMqttMsg("testTopic", 2, "hello world send...");

    }

    /**
     * @param topicName 主题名字
     * @param message   发送的消息
     * @author YangLinWei
     * @date 2019/9/4  10:17
     * @qos 请求服务质量，0：至多一次，1：至少一次，2：刚好一次
     */
    private void sendMqttMsg(String topicName, int qos, String message) {
        Message<String> messages = MessageBuilder.withPayload(message).setHeader(MqttHeaders.TOPIC, topicName)
                .setHeader(MqttHeaders.QOS, qos)
                .setHeader(MqttHeaders.RETAINED, true).build();

        mqtt.handleMessage(messages);
    }
}

消费者（consumer）：

依赖：

<?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">
    <parent>
        <artifactId>spring-mqtt-demo</artifactId>
        <groupId>com.ylw</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>consumer</artifactId>
    <dependencies>
        <dependency>
            <groupId>org.springframework.integration</groupId>
            <artifactId>spring-integration-core</artifactId>
            <version>4.3.9.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.integration</groupId>
            <artifactId>spring-integration-mqtt</artifactId>
            <version>4.3.9.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.eclipse.paho</groupId>
            <artifactId>org.eclipse.paho.client.mqttv3</artifactId>
            <version>1.2.0</version>
        </dependency>
    </dependencies>


</project>

配置文件（mqtt_consumer.xml）：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:int="http://www.springframework.org/schema/integration"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:int-mqtt="http://www.springframework.org/schema/integration/mqtt"
       xsi:schemaLocation="
        http://www.springframework.org/schema/integration http://www.springframework.org/schema/integration/spring-integration-4.1.xsd
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
        http://www.springframework.org/schema/integration/mqtt http://www.springframework.org/schema/integration/mqtt/spring-integration-mqtt-4.1.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context-4.1.xsd">


    <bean id="mqttCallback" class="com.ylw.MqttReciever"></bean>

    <bean id="options" class="org.eclipse.paho.client.mqttv3.MqttConnectOptions">
        <property name="cleanSession" value="true"></property>
        <property name="connectionTimeout" value="30"></property>
        <property name="keepAliveInterval" value="45"></property>
        <property name="userName" value="user1"></property>
        <property name="password" value="123456"></property>
    </bean>

    <bean id="client" class="org.eclipse.paho.client.mqttv3.MqttClient">
        <constructor-arg name="serverURI" value="tcp://127.0.0.1:1883"></constructor-arg>
        <constructor-arg name="clientId" value="clientId_consumer"></constructor-arg>
        <property name="callback" ref="mqttCallback"></property>
    </bean>

</beans>

单元测试类（ConsumerTestUnit.java）：

import org.eclipse.paho.client.mqttv3.MqttClient;
import org.eclipse.paho.client.mqttv3.MqttConnectOptions;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = "classpath:mqtt_consumer.xml")
public class ConsumerTestUnit {

    @Autowired
    MqttClient client;

    @Autowired
    private MqttConnectOptions options;

    @Test
    public void testQueue() {
        try {
            client.connect(options);
            client.subscribe("testTopic", 2);
            System.in.read();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

消息监听类（MqttReciever.java）：

package com.ylw;

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

public class MqttReciever implements MqttCallback {
    @Override
    public void connectionLost(Throwable throwable) {

    }

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

    }

    @Override
    public void deliveryComplete(IMqttDeliveryToken iMqttDeliveryToken) {

    }
}