百度开放云物接入IoT--Java客户端

来源：互联网发布：wps office mac版下载编辑：程序博客网时间：2024/05/21 19:24

给出一个百度云开放平台的Java客户端示例代码，进行了一点点修改

以上一篇写的文章中的websocket客户端为发布者。订阅者我们用百度的示例Java程序

百度开放云物接入IoT–MQTT测试

订阅者的客户端代码如下：

package com.mymqtt.baidu;import java.security.KeyStore;import javax.net.ssl.SSLContext;import javax.net.ssl.TrustManager;import javax.net.ssl.TrustManagerFactory;import org.eclipse.paho.client.mqttv3.MqttClient;import org.eclipse.paho.client.mqttv3.MqttConnectOptions;public class Client {    public static void main(String[] args) throws Exception {        String endpoint = "ssl://gwcheng.mqtt.iot.gz.baidubce.com:1884";   //输入创建endpoint返回的地址        String username = "gwcheng/mything1";    //输入创建thing返回的username        String password = "H0aUPreSnca3NslTft+oHjwgZEMjZPOfNBgXnb2F+6o="; //输入创建principal返回的password        String topic = "helloTopic"; //订阅的消息主题，本例是指订阅helloTopic        TrustManagerFactory tmf = TrustManagerFactory.getInstance("X509");        tmf.init((KeyStore)null);        TrustManager[] trustManagers = tmf.getTrustManagers();        SSLContext ctx = SSLContext.getInstance("TLS");        ctx.init(null, trustManagers, null);        MqttConnectOptions options = new MqttConnectOptions();        options.setCleanSession(true);        options.setUserName(username);        options.setPassword(password.toCharArray());        options.setSocketFactory(ctx.getSocketFactory());        MqttClient client = new MqttClient(endpoint, topic);        client.connect(options);        client.setCallback(new PushCallback());        // 为了不让程序退出，一直处于接收消息阶段。        while(true){            client.subscribe(topic,2);;        }        // client.disconnect();    }}

好了，运行我们的websocket和Java程序

这里写图片描述

参考文献

百度官方文档

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