Java 发送请求调用他人接口：设备控制示例

在Java中发送请求调用别人的接口，可以使用Java的网络编程库如HttpClient或HttpURLConnection。

使用HttpClient发送POST请求的示例代码如下：

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.ContentType;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.util.EntityUtils;

public class Main {
    public static void main(String[] args) {
        HttpClient httpClient = HttpClientBuilder.create().build();
        HttpPost httpPost = new HttpPost('http://iot.leelen.com/ttiot/api/thirdIot/iot-api');

        // 设置请求头
        httpPost.setHeader('Content-Type', 'application/json');

        // 设置请求体
        String requestBody = '{"header":{"namespace":"Leelen.Iot.Device.Control","name":"TurnOn","messageId":"1bd5d003-31b9-476f-ad03-71d471XXXXXX","payLoadVersion":1},"payload":{"accessToken":"access token","deviceId":"23","deviceType":"XXX","attribute":"powerstate","value":"on","extensions":{"extension1":"","extension2":""}}}';
        StringEntity requestEntity = new StringEntity(requestBody, ContentType.APPLICATION_JSON);
        httpPost.setEntity(requestEntity);

        try {
            HttpResponse httpResponse = httpClient.execute(httpPost);
            HttpEntity responseEntity = httpResponse.getEntity();
            String responseString = EntityUtils.toString(responseEntity);
            System.out.println(responseString);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

以上代码使用了Apache HttpClient库，首先创建一个HttpClient实例，然后创建一个HttpPost实例，设置请求的URL和请求头。接下来设置请求体，即接口的参数。最后执行请求并获取响应。注意要处理异常情况。

设备控制接口

请求URL：

http://iot.leelen.com/ttiot/api/thirdIot/iot-api

请求方式：

POST

application

设备打开

{
  'header':{
      'namespace':'Leelen.Iot.Device.Control',
      'name':'TurnOn',
      'messageId':'1bd5d003-31b9-476f-ad03-71d471XXXXXX',
      'payLoadVersion':1
   },
   'payload':{
       'accessToken':'access token',
       'deviceId':'23',
       'deviceType':'XXX',
       'attribute':'powerstate',
       'value':'on',
       'extensions':{
          'extension1':'',
          'extension2':''
      }
    }
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