序

MQTT（Message Queuing Telemetry Transport）是基于二进制消息的发布/订阅编程模式的消息协议，非常适合需要低功耗和网络带宽有限的IoT场景。这里简单介绍一下如何在springboot中集成。

maven

<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-integration</artifactId> </dependency> <dependency> <groupId>org.springframework.integration</groupId> <artifactId>spring-integration-stream</artifactId> </dependency> <dependency> <groupId>org.springframework.integration</groupId> <artifactId>spring-integration-mqtt</artifactId> </dependency>

配置client factory

@Bean public MqttPahoClientFactory mqttClientFactory() { DefaultMqttPahoClientFactory factory = new DefaultMqttPahoClientFactory(); factory.setServerURIs("tcp://demo:1883");// factory.setUserName("guest");// factory.setPassword("guest"); return factory; }

配置consumer

@Bean public IntegrationFlow mqttInFlow() { return IntegrationFlows.from(mqttInbound()) .transform(p -> p + ", received from MQTT") .handle(logger()) .get(); } private LoggingHandler logger() { LoggingHandler loggingHandler = new LoggingHandler("INFO"); loggingHandler.setLoggerName("siSample"); return loggingHandler; } @Bean public MessageProducerSupport mqttInbound() { MqttPahoMessageDrivenChannelAdapter adapter = new MqttPahoMessageDrivenChannelAdapter("siSampleConsumer", mqttClientFactory(), "siSampleTopic"); adapter.setCompletionTimeout(5000); adapter.setConverter(new DefaultPahoMessageConverter()); adapter.setQos(1); return adapter; }

配置producer

@Bean public IntegrationFlow mqttOutFlow() { //console input// return IntegrationFlows.from(CharacterStreamReadingMessageSource.stdin(),// e -> e.poller(Pollers.fixedDelay(1000)))// .transform(p -> p + " sent to MQTT")// .handle(mqttOutbound())// .get(); return IntegrationFlows.from(outChannel()) .handle(mqttOutbound()) .get(); } @Bean public MessageChannel outChannel() { return new DirectChannel(); } @Bean public MessageHandler mqttOutbound() { MqttPahoMessageHandler messageHandler = new MqttPahoMessageHandler("siSamplePublisher", mqttClientFactory()); messageHandler.setAsync(true); messageHandler.setDefaultTopic("siSampleTopic"); return messageHandler; }

配置MessagingGateway

@MessagingGateway(defaultRequestChannel = "outChannel")public interface MsgWriter { void write(String note);}

这样就大功告成了

doc

spring-integration-mqtt

spring-integration-samples-mqtt

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。