springcloud/SpringCloud-Example/admin-client-appmqttserver/src/main/java/com/rehome/adminclientappmqttserver/MqttRSAClientYFAPP.java

package com.rehome.adminclientappmqttserver;


import com.google.gson.Gson;
import com.rehome.adminclientappmqttserver.controller.UseryfController;
import com.rehome.adminclientappmqttserver.entity.Useryf;
import org.eclipse.paho.client.mqttv3.*;
import org.eclipse.paho.client.mqttv3.persist.MemoryPersistence;


public class MqttRSAClientYFAPP {
    /**
     * 代理服务器ip地址
     */
    public static final String MQTT_BROKER_HOST = "tcp://39.101.173.20:1883";

    /**
     * 客户端唯一标识
     */
    public static final String MQTT_CLIENT_ID = "AppServer_YF_APP_server_03";

    /**
     *
     */
    public static final String USERNAME = "admin";
    /**
     * 密码
     */
    public static final String PASSWORD = "public";
    /**
     * 订阅标识
     */
    public static final String TOPIC_FILTER = "app_push_yf";

    private volatile static MqttClient mqttClient;
    private static MqttConnectOptions options;
    private static int qos = 2;
    private UseryfController userController;

    public MqttRSAClientYFAPP(){
        try {
            // host为主机名，clientid即连接MQTT的客户端ID，一般以客户端唯一标识符表示，
            // MemoryPersistence设置clientid的保存形式，默认为以内存保存
            mqttClient = new MqttClient(MQTT_BROKER_HOST, MQTT_CLIENT_ID, new MemoryPersistence());
            // 配置参数信息
            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);
            // 设置用户名
            options.setUserName(USERNAME);
            // 设置密码
            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);
            //断线重连
            options.setAutomaticReconnect(true);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    public void start(UseryfController userController) {
        this.userController=userController;
        try {
            // 连接
            mqttClient.connect(options);
            // 订阅
            mqttClient.subscribe(TOPIC_FILTER,qos);
            // 设置回调
            mqttClient.setCallback(new MqttCallbackExtended(){

                @Override
                public void connectionLost(Throwable throwable) {
                    System.out.println("connectionLost");
                    try {
                        mqttClient.reconnect();
                    } catch (MqttException e) {
                        e.printStackTrace();
                    }
                }

                @Override
                public void messageArrived(String s, MqttMessage mqttMessage) throws Exception {
                    System.out.println("topic:"+s);
                    System.out.println("Qos:"+mqttMessage.getQos());
                    System.out.println("message RSA:"+new String(mqttMessage.getPayload()));
                    System.out.println("云浮APP收到mqtt消息");
                    try {
                        String messageDe = RSAAndroid.decryptByPrivateKeyForSpiltStr(new String(mqttMessage.getPayload()), RSAAndroid.privateRsaKey);
                        System.out.println("message content:"+messageDe);
                        Gson gson = new Gson();

                        Useryf userInfo = gson.fromJson(messageDe, Useryf.class);
                        System.out.println(userInfo.getUsername());
                        System.out.println(userInfo.getPassword());
                        System.out.println(userInfo.getDate());
                        System.out.println(userInfo.getNfc());
                        userController.saveUserYF(userInfo);
                    }catch (Exception e){
                        e.printStackTrace();
                    }
                }

                @Override
                public void deliveryComplete(IMqttDeliveryToken iMqttDeliveryToken) {
                    System.out.println("deliveryComplete---------"+ iMqttDeliveryToken.isComplete());
                }

                @Override
                public void connectComplete(boolean b, String s) {
                    //连接成功后调用
                    try {
                        mqttClient.subscribe(TOPIC_FILTER,qos);//具体订阅代码
                    } catch (MqttException e) {
                        e.printStackTrace();
                    }
                }
            });
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}