feat 发布 MQTT 消息 和订阅 MQTT 主题

src/main/java/com/muyu/mqtt/MsgHandler.java

@@ -23,7 +23,7 @@ public class MsgHandler {
         System.out.println("接收到消息：" + msg);
         MqttProperties mqttProperties = MqttProperties.configBuild(
                 "47.102.133.88",
-                "mqtt/test"
+                "test1"
         );
          log.error("接收到消息初始化信息:{}",mqttProperties);
         MqttClient mqttClient = mqttFactory.creatClient(mqttProperties);

src/main/java/com/muyu/receive/PublishSample.java

@@ -0,0 +1,52 @@
+package com.muyu.receive;
+
+import org.eclipse.paho.client.mqttv3.MqttClient;
+import org.eclipse.paho.client.mqttv3.MqttConnectOptions;
+import org.eclipse.paho.client.mqttv3.MqttException;
+import org.eclipse.paho.client.mqttv3.MqttMessage;
+import org.eclipse.paho.client.mqttv3.persist.MemoryPersistence;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class PublishSample {
+
+   public static void main(String[] args) {
+
+       String broker = "tcp://47.102.133.88:1883";
+       String topic = "test1";
+       String username = "";
+       String password = "";
+       String clientid = "publish_client";
+       String content = "Hello MQTT";
+
+       int qos = 0;
+       try {
+           MqttClient client = new MqttClient(broker, clientid, new MemoryPersistence());
+           // 连接参数
+           MqttConnectOptions options = new MqttConnectOptions();
+           // 设置用户名和密码
+           options.setUserName(username);
+           options.setPassword(password.toCharArray());
+           options.setConnectionTimeout(60);
+          options.setKeepAliveInterval(60);
+           // 连接
+           client.connect(options);
+           // 创建消息并设置 QoS
+           MqttMessage message = new MqttMessage(content.getBytes());
+           message.setQos(qos);
+           // 发布消息
+           client.publish(topic, message);
+           System.out.println("Message published");
+           System.out.println("topic: " + topic);
+           System.out.println("message content: " + content);
+           // 关闭连接
+           client.disconnect();
+           // 关闭客户端
+           client.close();
+      } catch (MqttException e) {
+           throw new RuntimeException(e);
+      }
+       SpringApplication.run(PublishSample.class, args);
+  }
+}

src/main/java/com/muyu/receive/ReceiveCarMessage.java

@@ -0,0 +1,60 @@
+package com.muyu.receive;
+
+import org.eclipse.paho.client.mqttv3.*;
+import org.eclipse.paho.client.mqttv3.persist.MemoryPersistence;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+/**
+ * 接受小车报文
+ *
+ * @author Yangle
+ * Date 2024/5/31 20:26
+ */
+@SpringBootApplication
+public class ReceiveCarMessage {
+
+    public static void main(String[] args) {
+        String broker ="tcp://47.102.133.88:1883";
+        String topic="mqtt/test";
+        String username="emqx";
+        String password="public";
+        String cliented="subscribe_client";
+        int qos=0;
+
+        try {
+            MqttClient client  = new MqttClient(broker, cliented, new MemoryPersistence());
+            //连接参数
+            MqttConnectOptions options = new MqttConnectOptions();
+            options.setUserName(username);
+            options.setPassword(password.toCharArray());
+            options.setConnectionTimeout(60);
+            options.setKeepAliveInterval(60);
+            //设置回调
+            client.setCallback(new MqttCallback() {
+                @Override
+                public void connectionLost(Throwable cause) {
+                    System.out.println("connectionLost:"+cause.getMessage());
+                }
+
+                @Override
+                public void messageArrived(String s, MqttMessage message) throws Exception {
+                    System.out.println("topice:"+topic);
+                    System.out.println("Qos:"+message.getQos());
+                    System.out.println("message content:"+new String(message.getPayload()));
+                }
+
+                @Override
+                public void deliveryComplete(IMqttDeliveryToken token) {
+                    System.out.println("deliveryComplete---------" + token.isComplete());
+                }
+            });
+           client.connect(options);
+           client.subscribe(topic,qos);
+        } catch (MqttException e) {
+            throw new RuntimeException(e);
+        }
+        SpringApplication.run(ReceiveCarMessage.class, args);
+    }
+
+}

src/main/java/com/muyu/receive/SubscribeSample.java

@@ -0,0 +1,49 @@
+package com.muyu.receive;
+
+import org.eclipse.paho.client.mqttv3.*;
+import org.eclipse.paho.client.mqttv3.persist.MemoryPersistence;
+
+public class SubscribeSample {
+   public static void main(String[] args) {
+       String broker = "tcp://47.102.133.88:1883";
+       String topic = "mqtt/test";
+       String username = "emqx";
+       String password = "public";
+       String clientid = "subscribe_client";
+       int qos = 0;
+
+       try {
+           MqttClient client = new MqttClient(broker, clientid, new MemoryPersistence());
+           // 连接参数
+           MqttConnectOptions options = new MqttConnectOptions();
+           options.setUserName(username);
+           options.setPassword(password.toCharArray());
+           options.setConnectionTimeout(60);
+      options.setKeepAliveInterval(60);
+           // 设置回调
+           client.setCallback(new MqttCallback() {
+
+               @Override
+               public void connectionLost(Throwable cause) {
+                   System.out.println("connectionLost: " + cause.getMessage());
+              }
+               @Override
+               public void messageArrived(String topic, MqttMessage message) {
+                   System.out.println("topic: " + topic);
+                   System.out.println("Qos: " + message.getQos());
+                   System.out.println("message content: " + new String(message.getPayload()));
+
+              }
+               @Override
+               public void deliveryComplete(IMqttDeliveryToken token) {
+                   System.out.println("deliveryComplete---------" + token.isComplete());
+              }
+
+          });
+           client.connect(options);
+           client.subscribe(topic, qos);
+      } catch (Exception e) {
+           e.printStackTrace();
+      }
+  }
+}