基于springboot设计的物联网平台,其实现mqtt协议、http协议、coap协议接入,示范代码中http协议部分包括发送端,订阅端,网关借口,列出代码依赖项,mqtt协议部分包括发送端,订阅端,网关借口,列出代码依赖项,coap协议部分包括发送端,订阅端,网关借口,列出代码依赖项,并提供示范代码
时间: 2023-10-21 16:03:31 浏览: 131
好的,以下是基于Spring Boot设计的物联网平台,实现MQTT、HTTP和CoAP协议接入的示范代码及其依赖项:
1. HTTP协议部分:
- 发送端:使用Spring的RestTemplate进行HTTP请求发送,依赖Spring Web和Spring Boot Starter Web模块。示范代码如下:
```java
@Component
public class HttpSender {
@Autowired
private RestTemplate restTemplate;
public void sendHttpRequest(String url, Object request) {
restTemplate.postForEntity(url, request, String.class);
}
}
```
- 订阅端:使用Spring WebFlux框架进行Web响应式编程,依赖Spring WebFlux和Spring Boot Starter WebFlux模块。示范代码如下:
```java
@Controller
public class HttpSubscriber {
@GetMapping(value = "/subscribe")
public Mono<String> subscribe() {
return Mono.just("Hello from HTTP subscriber!");
}
}
```
- 网关接口:使用Spring Cloud Gateway网关进行HTTP协议转发,依赖Spring Cloud Gateway模块。示范代码如下:
```yaml
spring:
cloud:
gateway:
routes:
- id: http-route
uri: http://localhost:8080
predicates:
- Path=/http/**
filters:
- RewritePath=/http/(?<segment>.*), /$\{segment}
```
2. MQTT协议部分:
- 发送端:使用Eclipse Paho MQTT客户端进行MQTT协议消息发送,依赖Eclipse Paho MQTT Client库。示范代码如下:
```java
@Component
public class MqttSender {
@Value("${mqtt.broker}")
private String brokerUrl;
public void sendMessage(String topic, String message) {
MqttClient client;
try {
client = new MqttClient(brokerUrl, MqttClient.generateClientId());
client.connect();
MqttMessage mqttMessage = new MqttMessage();
mqttMessage.setPayload(message.getBytes());
client.publish(topic, mqttMessage);
client.disconnect();
} catch (MqttException e) {
e.printStackTrace();
}
}
}
```
- 订阅端:使用Eclipse Paho MQTT客户端进行MQTT协议消息订阅,依赖Eclipse Paho MQTT Client库。示范代码如下:
```java
@Component
public class MqttSubscriber {
private MqttClient client;
@Value("${mqtt.broker}")
private String brokerUrl;
@PostConstruct
public void init() {
try {
client = new MqttClient(brokerUrl, MqttClient.generateClientId());
client.setCallback(new MqttCallback() {
@Override
public void connectionLost(Throwable throwable) {
}
@Override
public void messageArrived(String topic, MqttMessage mqttMessage) throws Exception {
System.out.println("Received message from " + topic + ": " + mqttMessage.toString());
}
@Override
public void deliveryComplete(IMqttDeliveryToken iMqttDeliveryToken) {
}
});
client.connect();
} catch (MqttException e) {
e.printStackTrace();
}
}
public void subscribe(String topic) throws MqttException {
client.subscribe(topic);
}
}
```
- 网关接口:使用Eclipse Paho MQTT客户端和Spring Integration框架实现MQTT消息和HTTP协议的相互转换,依赖Eclipse Paho MQTT Client库和Spring Integration模块。示范代码如下:
```java
@Configuration
@EnableIntegration
public class MqttHttpGatewayConfiguration {
@Value("${mqtt.broker}")
private String brokerUrl;
@Value("${mqtt.topic}")
private String topic;
@Bean
public MessagingGatewaySupport mqttGateway() throws MqttException {
MqttPahoClientFactory clientFactory = new DefaultMqttPahoClientFactory();
((DefaultMqttPahoClientFactory) clientFactory).setConnectionOptions(getMqttConnectOptions());
((DefaultMqttPahoClientFactory) clientFactory).setServerURIs(brokerUrl);
MqttPahoMessageDrivenChannelAdapter adapter = new MqttPahoMessageDrivenChannelAdapter(
MqttClient.generateClientId(), clientFactory, topic);
adapter.setCompletionTimeout(5000);
adapter.setConverter(new DefaultPahoMessageConverter());
MessageProducerSupport messageProducer = new MessageProducerSupport() {
@Override
protected void handleMessageInternal(Message<?> message) {
String payload = (String) message.getPayload();
HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.TEXT_PLAIN);
HttpEntity<String> request = new HttpEntity<>(payload, headers);
RestTemplate restTemplate = new RestTemplate();
restTemplate.postForEntity("http://localhost:8080/http", request, String.class);
}
};
IntegrationFlow flow = IntegrationFlows.from(adapter)
.transform(new DefaultMqttPahoMessageConverter())
.handle(messageProducer)
.get();
IntegrationFlowContext flowContext = new IntegrationFlowContext();
flowContext.registration(flow).register();
return flowContext.getBean("mqttGateway", MessagingGatewaySupport.class);
}
private MqttConnectOptions getMqttConnectOptions() {
MqttConnectOptions options = new MqttConnectOptions();
options.setCleanSession(true);
options.setConnectionTimeout(10);
return options;
}
}
```
3. CoAP协议部分:
- 发送端:使用Eclipse Californium CoAP库进行CoAP协议请求发送,依赖Eclipse Californium CoAP库。示范代码如下:
```java
@Component
public class CoapSender {
private final CoapClient coapClient = new CoapClient();
public void sendCoapRequest(String url, String payload) {
coapClient.setURI(url);
coapClient.post(payload, MediaTypeRegistry.TEXT_PLAIN);
}
}
```
- 订阅端:使用Eclipse Californium CoAP库进行CoAP协议请求响应处理,依赖Eclipse Californium CoAP库。示范代码如下:
```java
@Component
public class CoapSubscriber {
private final CoapServer coapServer = new CoapServer();
@PostConstruct
public void init() {
coapServer.add(new CoapResource("coap") {
@Override
public void handlePOST(CoapExchange exchange) {
System.out.println("Received message from CoAP subscriber: " + exchange.getRequestText());
exchange.respond("Hello from CoAP subscriber!");
}
});
coapServer.start();
}
}
```
- 网关接口:使用Eclipse Californium CoAP库和Spring Integration框架实现CoAP消息和HTTP协议的相互转换,依赖Eclipse Californium CoAP库和Spring Integration模块。示范代码如下:
```java
@Configuration
@EnableIntegration
public class CoapHttpGatewayConfiguration {
@Bean
public CoapEndpoint coapEndpoint() {
CoapEndpoint coapEndpoint = new CoapEndpoint();
coapEndpoint.setAddress("127.0.0.1");
coapEndpoint.setPort(5683);
return coapEndpoint;
}
@Bean
public CoapInboundGateway coapInboundGateway() {
CoapInboundGateway coapInboundGateway = new CoapInboundGateway();
coapInboundGateway.setEndpoint(coapEndpoint());
coapInboundGateway.setRequestChannel(coapRequestChannel());
coapInboundGateway.setRequestPayloadType(String.class);
coapInboundGateway.setRequestTimeout(5000);
return coapInboundGateway;
}
@Bean
public MessageChannel coapRequestChannel() {
return new DirectChannel();
}
@Bean
public IntegrationFlow coapToHttpFlow() {
return IntegrationFlows.from(coapInboundGateway())
.transform(new ObjectToStringTransformer())
.handle(Http.outboundChannelAdapter("http://localhost:8080/http"))
.get();
}
}
```
以上是示范代码及其依赖项,希望对您有所帮助。如有任何问题,请随时提出。
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