springboot mqtt依赖
时间: 2023-11-14 15:08:07 浏览: 96
要在Spring Boot项目中使用MQTT,需要添加以下依赖:
```xml
<dependency>
<groupId>org.springframework.integration</groupId>
<artifactId>spring-integration-mqtt</artifactId>
<version>5.3.2.RELEASE</version>
</dependency>
```
同时,还需要在application.properties或application.yml中配置MQTT连接信息,例如:
```yaml
spring:
mqtt:
url: tcp://localhost:1883
username: admin
password: admin
```
相关问题
springboot mqtt
Spring Boot提供了与MQTT(Message Queuing Telemetry Transport)集成的支持,以便在应用程序中实现轻量级的消息传递。Mqtt是一个基于TCP / IP协议的消息发布和订阅协议,它被广泛用于物联网(IoT)应用程序中。
要在Spring Boot中使用MQTT,您需要添加以下依赖项:
```xml
<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>
```
然后,在您的应用程序中,您需要创建一个MqttPahoMessageHandler bean来处理消息:
```java
@Configuration
@EnableIntegration
public class MqttConfig {
@Value("${mqtt.broker-url}")
private String brokerUrl;
@Value("${mqtt.username}")
private String username;
@Value("${mqtt.password}")
private String password;
@Bean
public MessageChannel mqttInputChannel() {
return new DirectChannel();
}
@Bean
public MqttPahoClientFactory mqttClientFactory() {
DefaultMqttPahoClientFactory factory = new DefaultMqttPahoClientFactory();
factory.setUserName(username);
factory.setPassword(password);
factory.setServerURIs(brokerUrl);
return factory;
}
@Bean
public MessageProducer inbound() {
MqttPahoMessageDrivenChannelAdapter adapter =
new MqttPahoMessageDrivenChannelAdapter(brokerUrl, "clientId", mqttClientFactory(), "topic");
adapter.setCompletionTimeout(5000);
adapter.setConverter(new DefaultPahoMessageConverter());
adapter.setQos(1);
adapter.setOutputChannel(mqttInputChannel());
return adapter;
}
@Bean
@ServiceActivator(inputChannel = "mqttInputChannel")
public MessageHandler handler() {
return new MessageHandler() {
@Override
public void handleMessage(Message<?> message) throws MessagingException {
System.out.println(message.getPayload());
}
};
}
}
```
在上面的示例中,我们创建了一个MqttPahoClientFactory bean,该bean配置了MQTT连接,包括连接到代理的URL,用户名和密码。然后,我们创建了一个MqttPahoMessageDrivenChannelAdapter bean,该bean用于接收来自MQTT代理的消息。最后,我们创建了一个MessageHandler bean,该bean用于处理接收到的消息。
您还需要在application.properties文件中设置以下属性:
```
mqtt.broker-url=tcp://localhost:1883
mqtt.username=username
mqtt.password=password
```
在这里,我们设置了MQTT代理的URL,以及用于连接到代理的用户名和密码。
现在,您可以在您的应用程序中使用MqttTemplate bean来发送MQTT消息:
```java
@Autowired
private MqttTemplate mqttTemplate;
public void sendMessage(String topic, String payload) {
mqttTemplate.convertAndSend(topic, payload);
}
```
在这里,我们注入了一个MqttTemplate bean,并使用其convertAndSend方法来发送消息。您可以将主题和有效载荷作为参数传递给此方法。
这是一个简单的示例,演示了如何在Spring Boot中使用MQTT。您可以根据需要进行更改和扩展。
springboot mqtt服务
Spring Boot提供了对MQTT(Message Queuing Telemetry Transport)协议的支持,可以轻松地在Spring Boot应用程序中集成MQTT服务。使用Spring Boot的MqttPahoClient库可以很方便地实现与MQTT代理的通信。
要在Spring Boot应用程序中使用MQTT服务,需要添加以下依赖项到你的pom.xml文件中:
```xml
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-integration</artifactId>
</dependency>
<dependency>
<groupId>org.eclipse.paho</groupId>
<artifactId>org.eclipse.paho.client.mqttv3</artifactId>
<version>1.2.5</version>
</dependency>
```
然后,你可以使用`@EnableIntegration`注解启用Spring Integration,并使用`@Bean`注解创建一个基于MqttPahoClient的消息监听器容器(MessageListenerContainer)。示例如下:
```java
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.integration.annotation.IntegrationComponentScan;
import org.springframework.integration.annotation.MessagingGateway;
import org.springframework.integration.annotation.ServiceActivator;
import org.springframework.integration.channel.DirectChannel;
import org.springframework.integration.config.EnableIntegration;
import org.springframework.integration.core.MessageProducer;
import org.springframework.integration.core.MessagingTemplate;
import org.springframework.integration.dsl.IntegrationFlow;
import org.springframework.integration.dsl.IntegrationFlows;
import org.springframework.integration.dsl.Pollers;
import org.springframework.integration.mqtt.core.DefaultMqttPahoClientFactory;
import org.springframework.integration.mqtt.inbound.MqttPahoMessageDrivenChannelAdapter;
import org.springframework.integration.mqtt.outbound.MqttPahoMessageHandler;
@Configuration
@EnableIntegration
@IntegrationComponentScan
public class MqttConfig {
private static final String MQTT_BROKER = "tcp://localhost:1883";
private static final String CLIENT_ID = "mqttClientId";
private static final String TOPIC = "your/topic";
@Bean
public DefaultMqttPahoClientFactory mqttClientFactory() {
DefaultMqttPahoClientFactory factory = new DefaultMqttPahoClientFactory();
factory.setServerURIs(MQTT_BROKER);
return factory;
}
@Bean
public MessageProducer inbound() {
MqttPahoMessageDrivenChannelAdapter adapter = new MqttPahoMessageDrivenChannelAdapter(CLIENT_ID,
mqttClientFactory(), TOPIC);
adapter.setCompletionTimeout(5000);
adapter.setConverter(new DefaultPahoMessageConverter());
adapter.setQos(1);
return adapter;
}
@Bean
public MessageProducer outbound() {
MqttPahoMessageHandler messageHandler = new MqttPahoMessageHandler(CLIENT_ID, mqttClientFactory());
messageHandler.setAsync(true);
messageHandler.setDefaultTopic(TOPIC);
return messageHandler;
}
@Bean
public IntegrationFlow mqttInFlow() {
return IntegrationFlows.from(inbound())
.transform(p -> p + ", received from MQTT")
.handle(logger())
.get();
}
@Bean
@ServiceActivator(inputChannel = "mqttOutboundChannel")
public MessageHandler mqttOutbound() {
MqttPahoMessageHandler messageHandler = new MqttPahoMessageHandler(CLIENT_ID, mqttClientFactory());
messageHandler.setAsync(true);
messageHandler.setDefaultTopic(TOPIC);
return messageHandler;
}
@Bean
public ApplicationRunner runner(MqttGateway gateway) {
return args -> {
gateway.sendToMqtt("Test message");
};
}
@Bean
public MessageChannel mqttOutboundChannel() {
return new DirectChannel();
}
@MessagingGateway(defaultRequestChannel = "mqttOutboundChannel")
public interface MqttGateway {
void sendToMqtt(String data);
}
@Bean
public LoggingHandler logger() {
return new LoggingHandler("INFO");
}
}
```
上述示例展示了如何配置一个支持MQTT的Spring Boot应用程序。在示例中,我们创建了一个基于MqttPahoClient的消息监听器容器,并通过`@EnableIntegration`和`@IntegrationComponentScan`启用和扫描Spring Integration配置。
阅读全文