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，http协议单独的网关接口，列出代码依赖项，mqtt协议部分包括发送端，订阅端，mqtt协议单独的网关接口，列出代码依赖项，coap协议部分包括发送端，订阅端，coap协议单独的网关接口，列出代码依赖项，并提供示范代码

对于基于Spring Boot设计的物联网平台，实现MQTT协议、HTTP协议、CoAP协议接入，以下是相关的示例代码和依赖项：

1. HTTP协议部分

依赖项：

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>

    <dependency>
        <groupId>org.springframework.integration</groupId>
        <artifactId>spring-integration-http</artifactId>
    </dependency>

    <dependency>
        <groupId>org.springframework.integration</groupId>
        <artifactId>spring-integration-stream</artifactId>
    </dependency>
</dependencies>

示例代码：

@RestController
public class HttpController {
    private final MessageChannel input;

    public HttpController(MessageChannel input) {
        this.input = input;
    }

    @PostMapping("/send")
    public ResponseEntity<String> send(@RequestBody String body) {
        input.send(MessageBuilder.withPayload(body).build());
        return ResponseEntity.ok("Message sent successfully");
    }
}

@Configuration
@EnableIntegration
public class HttpIntegrationConfig {

    @Value("${http.input}")
    private String httpInput;

    @Bean
    public IntegrationFlow httpInboundFlow() {
        return IntegrationFlows.from(Http.inboundChannelAdapter(httpInput))
                .channel(input())
                .get();
    }

    @Bean
    public MessageChannel input() {
        return new DirectChannel();
    }

    @Bean
    public IntegrationFlow httpOutboundFlow() {
        return IntegrationFlows.from(output())
                .handle(Http.outboundGateway("http://example.com"))
                .get();
    }

    @Bean
    public MessageChannel output() {
        return new DirectChannel();
    }
}

2. MQTT协议部分

依赖项：

<dependencies>
    <dependency>
        <groupId>org.springframework.integration</groupId>
        <artifactId>spring-integration-mqtt</artifactId>
    </dependency>
</dependencies>

示例代码：

@Configuration
@EnableIntegration
public class MqttIntegrationConfig {

    @Value("${mqtt.host}")
    private String mqttHost;

    @Value("${mqtt.topic}")
    private String mqttTopic;

    @Bean
    public IntegrationFlow mqttInboundFlow() {
        return IntegrationFlows.from(
                MQTT.inboundAdapter(mqttHost, mqttTopic)
                        .autoStartup(false)
                        .clientId("clientId")
                        .mqttVersion(MqttVersion.MQTT_3_1_1)
                        .qos(2)
                        .defaultRetained(false)
                        .async(false)
                        .subscribeTimeout(10000))
                .handle(message -> {
                    String payload = message.getPayload().toString();
                    // process the received message
                })
                .get();
    }

    @Bean
    public MessageChannel mqttOutputChannel() {
        return new DirectChannel();
    }

    @Bean
    public IntegrationFlow mqttOutboundFlow() {
        return IntegrationFlows.from(mqttOutputChannel())
                .handle(MQTT.outboundAdapter(mqttHost)
                        .async(true)
                        .defaultRetained(false)
                        .clientId("clientId")
                        .mqttVersion(MqttVersion.MQTT_3_1_1)
                        .qos(2)
                        .topicExpression("headers['mqtt_topic']"))
                .get();
    }

    @Bean
    public IntegrationFlow mqttGatewayFlow() {
        return IntegrationFlows.from(Mqtt.outboundGateway(mqttHost)
                        .async(true)
                        .defaultRetained(false)
                        .clientId("clientId")
                        .mqttVersion(MqttVersion.MQTT_3_1_1)
                        .qos(2)
                        .defaultTopic(mqttTopic))
                .get();
    }
}

3. CoAP协议部分

依赖项：

<dependencies>
    <dependency>
        <groupId>org.eclipse.californium</groupId>
        <artifactId>californium-core</artifactId>
        <version>2.0.0-M4</version>
    </dependency>

    <dependency>
        <groupId>org.springframework.integration</groupId>
        <artifactId>spring-integration-core</artifactId>
    </dependency>
</dependencies>

示例代码：

@Configuration
@EnableIntegration
public class CoapIntegrationConfig {

    @Value("${coap.port}")
    private int coapPort;

    @Bean
    public CoapEndpoint coapEndpoint() {
        return new CoapEndpoint(new InetSocketAddress(coapPort));
    }

    @Bean
    public IntegrationFlow coapInboundFlow() {
        return IntegrationFlows.from(coapInboundAdapter())
                .handle(message -> {
                    String payload = message.getPayload().toString();
                    // process the received message
                })
                .get();
    }

    @Bean
    public IntegrationFlow coapOutboundFlow() {
        return IntegrationFlows.from(MessageChannels.direct("coapOutboundChannel"))
                .handle(coapOutboundAdapter())
                .get();
    }

    @Bean
    public MessageProducerSupport coapInboundAdapter() {
        CoapInboundChannelAdapter adapter = new CoapInboundChannelAdapter(coapEndpoint());
        adapter.setInterceptors(Arrays.asList(new CoapEndpointInterceptor()));
        adapter.setOutputChannelName("coapInputChannel");
        return adapter;
    }

    @Bean
    public MessageHandler coapOutboundAdapter() {
        CoapEndpoint coapEndpoint = new CoapEndpoint(new InetSocketAddress("host", coapPort));
        coapEndpoint.addInterceptor(new CoapEndpointInterceptor());
        CoapOutboundGateway gateway = new CoapOutboundGateway(coapEndpoint, "coap://host/path");
        gateway.setOutputChannelName("coapOutputChannel");
        return gateway;
    }

    @Bean
    public MessageChannel coapInputChannel() {
        return new DirectChannel();
    }

    @Bean
    public MessageChannel coapOutputChannel() {
        return new DirectChannel();
    }

    @Bean
    public IntegrationFlow coapGatewayFlow() {
        return IntegrationFlows.from(Coap.outboundGateway("coap://example.com"))
                .get();
    }
}

class CoapEndpointInterceptor implements CoapEndpoint.CoapEndpointInterceptor {
    @Override
    public void sendMessage(CoapMessage message) throws CoapException {
        // intercept the outgoing message
    }

    @Override
    public void receiveMessage(CoapMessage message) throws CoapException {
        // intercept the incoming message
    }
}