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1、Java代码
1 package com.mao.mqtt; 2 3 import java.text.SimpleDateFormat; 4 import java.util.Date; 5 6 import org.eclipse.paho.client.mqttv3.IMqttDeliveryToken; 7 import org.eclipse.paho.client.mqttv3.MqttCallback; 8 import org.eclipse.paho.client.mqttv3.MqttClient; 9 import org.eclipse.paho.client.mqttv3.MqttConnectOptions; 10 import org.eclipse.paho.client.mqttv3.MqttException; 11 import org.eclipse.paho.client.mqttv3.MqttMessage; 12 import org.eclipse.paho.client.mqttv3.MqttTopic; 13 14 /** 15 * 16 * 功能描述：MQTT测试 17 * 创建人： mao2080@sina.com 18 * 创建时间：2017年7月4日 下午5:08:59 19 * 修改人： mao2080@sina.com 20 * 修改时间：2017年7月4日 下午5:08:59 21 */ 22 public class MQTTTest_tcp { 23 24 /**MQTT服务端ip及端口*/ 25 private static String host = "tcp://ip:1883"; 26 27 /**账号*/ 28 private static String username = "li2080"; 29 30 /**密码*/ 31 private static String password = "123"; 32 33 /**订阅的主题*/ 34 private static String subTopic = "a/b/c"; 35 36 /**clientID*/ 37 private static String clientId = "li2080"; 38 39 /**发布的主题*/ 40 private static String pubTopic = "a/b/c"; 41 42 /**MQTT-Client*/ 43 private static MqttClient client; 44 45 /**MQTT-Client*/ 46 private static int uuid = 0; 47 48 /** 49 * @throws InterruptedException 50 * @throws MqttException */ 51 public static void main(String[] args) throws InterruptedException, MqttException { 52 53 // 订阅消息的方法 54 subscribe(); 55 // 56 publish(); 57 } 58 59 /** 60 * 61 * 描述：订阅信息 62 * @author mao2080@sina.com 63 * @created 2017年7月4日 下午4:53:47 64 * @since 65 * @return 66 */ 67 public static void subscribe() { 68 try { 69 // 创建MqttClient 70 MQTTTest_tcp.getClient().setCallback(new MqttCallback() { 71 72 public void connectionLost(Throwable arg0) { 73 74 } 75 76 public void messageArrived(String topic, MqttMessage message) throws Exception { 77 System.out.println("MQTT Rece:" + message.toString()); 78 } 79 80 public void deliveryComplete(IMqttDeliveryToken token) { 81 82 } 83 84 }); 85 MQTTTest_tcp.getClient().subscribe(subTopic, 0); 86 System.out.println("连接状态:" + client.isConnected()); 87 } catch (Exception e) { 88 e.printStackTrace(); 89 } 90 } 91 92 /** 93 * 94 * 描述：获取MqttClient 95 * @author mao2080@sina.com 96 * @created 2017年7月6日 上午9:56:37 97 * @since 98 * @return 99 * @throws MqttException 100 */ 101 public static MqttClient getClient() throws MqttException{ 102 try { 103 if(client == null){ 104 client = new MqttClient(host, clientId); 105 MqttConnectOptions conOptions = new MqttConnectOptions(); 106 conOptions.setUserName(username); 107 conOptions.setPassword(password.toCharArray()); 108 conOptions.setCleanSession(true); 109 client.connect(conOptions); 110 } 111 if(!client.isConnected()){ 112 client.reconnect(); 113 } 114 } catch (Exception e) { 115 e.printStackTrace(); 116 } 117 return client; 118 } 119 120 /** 121 * 122 * 描述：发布信息 123 * @author mao2080@sina.com 124 * @throws MqttException 125 * @created 2017年7月4日 下午4:53:32 126 * @since 127 */ 128 public static void publish() throws MqttException { 129 SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); 130 String sendMsg = "{time:"+sdf.format(new Date())+", content:"+com.lds.iot.common.util.UUIDUtil.getLowerLetterNumber(15)+", from: java console}"; 131 try { 132 MqttTopic topic = MQTTTest_tcp.getClient().getTopic(pubTopic); 133 MqttMessage message = new MqttMessage(sendMsg.getBytes()); 134 message.setQos(0); 135 topic.publish(message); 136 System.out.println("MQTT Send:" + sendMsg); 137 } catch (Exception e) { 138 e.printStackTrace(); 139 } 140 } 141 142 143 144 }
2、Maven配置
1 <dependency> 2 <groupId>org.eclipse.paho</groupId> 3 <artifactId>org.eclipse.paho.client.mqttv3</artifactId> 4 <version>1.2.0</version> 5 </dependency>
3、运行效果
