spring cloud整合MQTT简单示例

package com.forezp; import org.eclipse.paho.client.mqttv3.MqttClient; import org.eclipse.paho.client.mqttv3.MqttConnectOptions; import org.eclipse.paho.client.mqttv3.persist.MemoryPersistence; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.cloud.client.discovery.EnableDiscoveryClient; import org.springframework.cloud.client.loadbalancer.LoadBalanced; import org.springframework.context.annotation.Bean; import org.springframework.integration.channel.DirectChannel; import org.springframework.integration.mqtt.core.DefaultMqttPahoClientFactory; import org.springframework.integration.mqtt.core.MqttPahoClientFactory; import org.springframework.messaging.MessageChannel; import org.springframework.web.client.RestTemplate; import com.forezp.service.PushCallback; @SpringBootApplication @EnableDiscoveryClient public class ServiceRibbonApplication { public static void main(String[] args) { SpringApplication.run(ServiceRibbonApplication.class, args); } @Bean public MessageChannel mqttInputChannel() { return new DirectChannel(); } @Bean public MqttPahoClientFactory mqttClientFactory() { DefaultMqttPahoClientFactory factory = new DefaultMqttPahoClientFactory(); factory.setServerURIs("tcp://127.0.0.1:61613"); factory.setUserName("admin"); factory.setPassword("password"); return factory; } @Bean public MqttClient start() { try { // host为主机名，clientid即连接MQTT的客户端ID，一般以唯一标识符表示，MemoryPersistence设置clientid的保存形式，默认为以内存保存 MqttClient client = new MqttClient("tcp://127.0.0.1:61613", "testClient1", new MemoryPersistence()); // MQTT的连接设置 MqttConnectOptions options = new MqttConnectOptions(); // 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，这里设置为true表示每次连接到服务器都以新的身份连接 options.setCleanSession(true); // 设置连接的用户名 options.setUserName("admin"); // 设置连接的密码 options.setPassword("password".toCharArray()); // 设置超时时间 单位为秒 options.setConnectionTimeout(10); // 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 options.setKeepAliveInterval(20); // 设置回调 client.setCallback(new PushCallback()); // MqttTopic topic = client.getTopic(TOPIC); //setWill方法，如果项目中需要知道客户端是否掉线可以调用该方法。设置最终端口的通知消息 // options.setWill(topic, "will>>>>>>close".getBytes(), 2, true); client.connect(options); //订阅消息 int[] Qos = {1}; String[] topic1 = {"testTopic2"}; client.subscribe(topic1, Qos); return client; } catch (Exception e) { e.printStackTrace(); return null; } } @Bean @LoadBalanced RestTemplate restTemplate() { return new RestTemplate(); } }