springboot整合mqtt
时间: 2023-09-07 12:11:06 浏览: 38
Spring Boot可以通过添加依赖项来轻松集成MQTT。具体步骤如下:
1.添加依赖项
在pom.xml文件中添加以下依赖项:
```
<dependency>
<groupId>org.springframework.integration</groupId>
<artifactId>spring-integration-mqtt</artifactId>
<version>5.3.2.RELEASE</version>
</dependency>
```
2.创建MQTT配置类
创建一个配置类,将MQTT连接工厂注入到Spring容器中。
```
@Configuration
public class MqttConfig {
@Value("${mqtt.broker.url}")
private String brokerUrl;
@Value("${mqtt.broker.username}")
private String username;
@Value("${mqtt.broker.password}")
private String password;
@Bean
public MqttConnectOptions mqttConnectOptions() {
MqttConnectOptions options = new MqttConnectOptions();
options.setUserName(username);
options.setPassword(password.toCharArray());
return options;
}
@Bean
public MqttPahoClientFactory mqttClientFactory() {
DefaultMqttPahoClientFactory factory = new DefaultMqttPahoClientFactory();
factory.setConnectionOptions(mqttConnectOptions());
return factory;
}
@Bean
public MessageChannel mqttInputChannel() {
return new DirectChannel();
}
@Bean
public MessageProducer inbound() {
MqttPahoMessageDrivenChannelAdapter adapter =
new MqttPahoMessageDrivenChannelAdapter(brokerUrl, "testClient", mqttClientFactory(), "topic");
adapter.setCompletionTimeout(5000);
adapter.setConverter(new DefaultPahoMessageConverter());
adapter.setQos(1);
adapter.setOutputChannel(mqttInputChannel());
return adapter;
}
}
```
3.创建消息处理器
创建一个消息处理器,用于处理接收到的消息。可以使用@MessageEndpoint注释将处理器标记为Spring集成的组件。
```
@MessageEndpoint
public class MqttMessageHandler {
@ServiceActivator(inputChannel = "mqttInputChannel")
public void handleMessage(String payload) {
System.out.println("Received message: " + payload);
}
}
```
4.发送和接收消息
使用@Autowire注释将MessageChannel注入到Spring组件中,以便发送消息。
```
@Autowired
private MessageChannel mqttInputChannel;
public void sendMessage(String payload) {
mqttInputChannel.send(MessageBuilder.withPayload(payload).build());
}
```
5.运行应用程序
现在,您可以运行应用程序并尝试发送和接收MQTT消息了。
通过以上步骤,您已经成功地将Spring Boot应用程序集成到MQTT中。