第一，pom配置，我们需要引入相关jar：
<dependency>
<groupId>org.springframework.integration</groupId>
<artifactId>spring-integration-stream</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.integration</groupId>
<artifactId>spring-integration-mqtt</artifactId>
</dependency>
第二，配置MQTT服务器基本信息，在springBoot配置文件application.properties中配置，添加如下：
#XML格式配置
#MQTT配置信息
#MQTT-用户名
spring.mqtt.username=admin
#MQTT-密码
spring.mqtt.password=password
#MQTT-服务器连接地址，如果有多个，用逗号隔开，如：tcp://127.0.0.1:61613，tcp://192.168.2.133:61613
spring.mqtt.url=tcp://127.0.0.1:61613
#MQTT-连接服务器默认客户端ID
spring.mqtt.client.id=mqttId
#MQTT-默认的消息推送主题，实际可在调用接口时指定
spring.mqtt.default.topic=topic
#YML格式配置
mqtt:
username: wisx
password: wisx
url: tcp://localhost:1883
client:
id: mqttId555
default:
topic: topic22
completionTimeout: 10000
第三，配置MQTT消息推送配置类，
@Configuration
@IntegrationComponentScan
public class MqttSenderConfig {
@Value("${spring.mqtt.username}")
private String username;
@Value("${spring.mqtt.password}")
private String password;
@Value("${spring.mqtt.url}")
private String hostUrl;
@Value("${spring.mqtt.client.id}")
private String clientId;
@Value("${spring.mqtt.default.topic}")
private String defaultTopic;
@Bean
public MqttConnectOptions getMqttConnectOptions(){
MqttConnectOptions mqttConnectOptions=new MqttConnectOptions();
mqttConnectOptions.setUserName(username);
mqttConnectOptions.setPassword(password.toCharArray());
mqttConnectOptions.setServerURIs(new String[]{hostUrl});
mqttConnectOptions.setKeepAliveInterval(2);
return mqttConnectOptions;
}
@Bean
public MqttPahoClientFactory mqttClientFactory() {
DefaultMqttPahoClientFactory factory = new DefaultMqttPahoClientFactory();
factory.setConnectionOptions(getMqttConnectOptions());
return factory;
}
@Bean
@ServiceActivator(inputChannel = "mqttOutboundChannel")
public MessageHandler mqttOutbound() {
MqttPahoMessageHandler messageHandler = new MqttPahoMessageHandler(clientId, mqttClientFactory());
messageHandler.setAsync(true);
messageHandler.setDefaultTopic(defaultTopic);
return messageHandler;
}
@Bean
public MessageChannel mqttOutboundChannel() {
return new DirectChannel();
}
}
第四，配置MqttGateway消息推送接口类，在sendToMqtt(String data,@Header(MqttHeaders.TOPIC)String topic)接口中，data为发送的消息内容，topic为主题。指定topic，则我们的接口可以根据需要，向不同的主题发送消息，方便灵活应用。如果不指定，则使用默认配置的主题。
@Component
@MessagingGateway(defaultRequestChannel = "mqttOutboundChannel")
public interface MqttGateway {
void sendToMqtt(String data, @Header(MqttHeaders.TOPIC) String topic);
}
第五，接口类测试下功能，用Postman调用sendMqtt.do接口，往hello主题发送消息，用MQTTLens订阅hello主题，从下面截图，可以看出可以正常往MQTT服务发送消息了，而且可以订阅到。
@RestController
@RequestMapping("/test")
public class TestController {
@Autowired
private MqttGateway mqttGateway;
@RequestMapping("/sendMqtt.do")
public String sendMqtt(String sendData){
mqttGateway.sendToMqtt(sendData,"hello");
return "OK";
}
}
image.png
image.png
参考转载自：https://blog.csdn.net/qq_41018959/article/details/80592444
第六，接收配置类
@Configuration
@IntegrationComponentScan
@Slf4j
public class MqttReceiveConfig {
@Value("${spring.mqtt.username}")
private String username;
@Value("${spring.mqtt.password}")
private String password;
@Value("${spring.mqtt.url}")
private String hostUrl;
@Value("${spring.mqtt.client.id}")
private String clientId;
@Value("${spring.mqtt.default.topic}")
private String defaultTopic;
@Value("${spring.mqtt.completionTimeout}")
private int completionTimeout ; //连接超时
@Autowired
AlarmService alarmService;
@Autowired
private MongoTemplate mongoTemplate;
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss zzz");
@Bean
public MqttConnectOptions getMqttConnectOptions(){
// MQTT的连接设置
MqttConnectOptions mqttConnectOptions=new MqttConnectOptions();
// 设置连接的用户名
mqttConnectOptions.setUserName(username);
// 设置连接的密码
mqttConnectOptions.setPassword(password.toCharArray());
// 设置是否清空session,这里如果设置为false表示服务器会保留客户端的连接记录，
// 把配置里的 cleanSession 设为false，客户端掉线后 服务器端不会清除session，
// 当重连后可以接收之前订阅主题的消息。当客户端上线后会接受到它离线的这段时间的消息
mqttConnectOptions.setCleanSession(false);
// 设置发布端地址
mqttConnectOptions.setServerURIs(new String[]{hostUrl});
// 设置会话心跳时间 单位为秒 服务器会每隔1.5*20秒的时间向客户端发送个消息判断客户端是否在线，但这个方法并没有重连的机制
mqttConnectOptions.setKeepAliveInterval(20);
return mqttConnectOptions;
}
@Bean
public MqttPahoClientFactory mqttClientFactory() {
DefaultMqttPahoClientFactory factory = new DefaultMqttPahoClientFactory();
factory.setConnectionOptions(getMqttConnectOptions());
return factory;
}
//接收通道
@Bean
public MessageChannel mqttInputChannel() {
return new DirectChannel();
}
//配置client,监听的topic
@Bean
public MessageProducer inbound() {
MqttPahoMessageDrivenChannelAdapter adapter =
new MqttPahoMessageDrivenChannelAdapter(clientId+"_inbound", mqttClientFactory(),
"elevators/cms/#"//加上这个为了匹配node red的topic
);
adapter.setCompletionTimeout(completionTimeout);
adapter.setConverter(new DefaultPahoMessageConverter());
adapter.setQos(1);
adapter.setOutputChannel(mqttInputChannel());
return adapter;
}
private String getCollectionName(String messageType){
if("report".equals(messageType)){
return "alarm";
}
if("singleRide".equals(messageType)){
return "singleride";
}
if("statisticsDaily".equals(messageType)
||"statisticsSingleRide".equals(messageType)){
return "statistics";
}
if("statisticsElevator".equals(messageType)){
return "kpis";
}
return "othertype";
}
//通过通道获取数据
@Bean
@ServiceActivator(inputChannel = "mqttInputChannel")
public MessageHandler handler() {
return new MessageHandler() {
@Override
public void handleMessage(Message<?> message) throws MessagingException {
String topic = message.getHeaders().get("mqtt_receivedTopic").toString();
}
}
}
}
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