java获取homeassistant的设备列表

您可以使用Home Assistant提供的REST API来获取设备列表。您需要使用Java中的HTTP客户端库来向Home Assistant发送HTTP请求并解析响应。以下是一个示例代码片段，可以帮助您开始：

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

public class HomeAssistantDeviceList {
    public static void main(String[] args) {
        try {
            String url = "http://<your-home-assistant-url>/api/devices";
            URL obj = new URL(url);
            HttpURLConnection con = (HttpURLConnection) obj.openConnection();
            con.setRequestMethod("GET");
            con.setRequestProperty("Authorization", "Bearer <your-home-assistant-access-token>");
            BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream()));
            String inputLine;
            StringBuffer response = new StringBuffer();
            while ((inputLine = in.readLine()) != null) {
                response.append(inputLine);
            }
            in.close();
            System.out.println(response.toString());
        } catch (Exception e) {
            System.out.println("Error: " + e.getMessage());
        }
    }
}

请注意，您需要将`<your-home-assistant-url>`和`<your-home-assistant-access-token>`替换为您自己的Home Assistant URL和访问令牌。此代码将打印Home Assistant返回的设备列表JSON字符串。您可以使用JSON库解析此字符串以获取设备列表。