(mqtt java客户端的使用参看这篇文章)
Spring Integration基于Eclipse Paho MQTT客户端库提供了支持MQTT协议的入站和出站通道适配器。但是使用起来不是很灵活(有可能是没有深入理解😂)。在参考了这篇文章后有了如下实现:
1. maven依赖
<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>
2. 配置文件
- applicationContext.xml
类型 | 描述 |
---|---|
DefaultMqttPahoClientFactory | 客户端工厂类,根据配置的选项(用户名、密码、服务器集群地址等)创建一个默认的客户端。 |
MqttPahoMessageHandler | MQTT出站通道适配器的抽象类的实现,用于推送消息。 |
<bean id="clientFactory"
class="org.springframework.integration.mqtt.core.DefaultMqttPahoClientFactory">
<property name="userName" value="${mqtt.username}"/>
<property name="password" value="${mqtt.password}"/>
<property name="cleanSession" value="${mqtt.cleanSession}"/>
<property name="keepAliveInterval" value="${mqtt.keepAliveInterval}"/>
<property name="serverURIs">
<array>
<value>${mqtt.serverURI1}</value>
</array>
</property>
</bean>
<bean id="mqttHandler" class="org.springframework.integration.mqtt.outbound.MqttPahoMessageHandler">
<constructor-arg name="clientId" value="${mqtt.clientId}"/>
<constructor-arg name="clientFactory" ref="clientFactory"/>
<property name="async" value="${mqtt.async}"/>
<property name="defaultQos" value="${mqtt.defaultQos}"/>
<property name="completionTimeout" value="${mqtt.completionTimeout}"/>
</bean>
- config.properties
#用户名
mqtt.username=mqttPubClient
#密码
mqtt.password=123456
#是否清除会话
mqtt.cleanSession=false
#服务端url
mqtt.serverURI1=tcp://localhost:1883
#是否异步发送
mqtt.async=true
#超时时间
mqtt.completionTimeout=20000
#心跳
mqtt.keepAliveInterval=30
#客户端id
mqtt.clientId=mqttPubClient
#默认的消息服务质量
mqtt.defaultQos=1
3. 调用
@Resource
private MqttPahoMessageHandler mqttHandler;
@Override
public void send(String topic, String content) {
// 构建消息
Message<String> messages = MessageBuilder.withPayload(content).setHeader(MqttHeaders.TOPIC, topic).build();
// 发送消息
mqttHandler.handleMessage(messages);
}
示例代码:https://github.com/brandonbai/mqtt-spring-boot/tree/master/samples/mqtt-spring-sample
链接
- 项目网站:https://www.eclipse.org/paho
- Eclipse项目信息:https://projects.eclipse.org/projects/iot.paho
- GitHub:https://github.com/eclipse/paho.mqtt.java
- MQTT Java客户端的使用://www.greatytc.com/p/65e1748a930c
- MQTT服务端Mosquitto搭建://www.greatytc.com/p/9e3cb7042a2e