Springboot整合Mqtt
Spring Boot整合MQTT需要使用Spring Integration MQTT支持。以下是一个基本的例子:
- 添加依赖到你的
pom.xml
:
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-integration</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.integration</groupId>
<artifactId>spring-integration-mqtt</artifactId>
</dependency>
</dependencies>
- 配置MQTT客户端并定义消息通道:
@Configuration
public class MqttConfig {
@Value("${mqtt.broker.url}")
private String brokerUrl;
@Value("${mqtt.client.id}")
private String clientId;
@Value("${mqtt.username}")
private String userName;
@Value("${mqtt.password}")
private String password;
@Value("${mqtt.default.topic}")
private String defaultTopic;
@Bean
public MqttPahoClientFactory mqttClient() {
DefaultMqttPahoClientFactory factory = new DefaultMqttPahoClientFactory();
MqttConnectOptions options = new MqttConnectOptions();
options.setServerURIs(new String[]{brokerUrl});
options.setUserName(userName);
options.setPassword(password.toCharArray());
factory.setConnectionOptions(options);
return factory;
}
@Bean
public MessageChannel mqttInputChannel() {
return new DirectChannel();
}
@Bean
public MessageProducer inbound() {
MqttPahoMessageDrivenChannelAdapter adapter =
new MqttPahoMessageDrivenChannelAdapter(clientId, mqttClient(), defaultTopic);
adapter.setCompletionTimeout(5000);
adapter.setQos(2);
adapter.setOutputChannel(mqttInputChannel());
return adapter;
}
}
- 监听MQTT通道并处理消息:
@Component
public class MqttReceiver {
@Autowired
private MessageChannel mqttInputChannel;
@Autowired
private SimpMessagingTemplate simpMessagingTemplate;
@PostConstruct
public void init() {
mqttInputChannel.subscribe(Message.class);
}
@MessageMapping("mqtt")
public void receiveMessage(String payload) {
// 处理接收到的消息
System.out.println("Received Message: " + payload);
// 可以发送消息到其他通道或者应用
simpMessagingTemplate.convertAndSend("/topic/mqtt", payload);
}
}
确保你的application.properties
或application.yml
文件包含了正确的MQTT配置:
mqtt.broker.url=tcp://localhost:1883
mqtt.client.id=testClient
mqtt.usernam
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