java连接homeassistant的WebSocket API

可以使用 Java WebSocket 客户端库来连接 HomeAssistant 的 WebSocket API。您需要使用 HomeAssistant 提供的 WebSocket API URL 和您的 HomeAssistant 访问令牌。然后，您可以使用 Java WebSocket 客户端库的 API 来发送和接收消息。以下是一个示例代码片段：

import java.net.URI;
import java.net.URISyntaxException;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import org.java_websocket.client.WebSocketClient;
import org.java_websocket.handshake.ServerHandshake;

public class HomeAssistantWebSocketClient extends WebSocketClient {

  private final CountDownLatch latch = new CountDownLatch(1);

  public HomeAssistantWebSocketClient(String url, String accessToken) throws URISyntaxException {
    super(new URI(url + "?auth_token=" + accessToken));
  }

  @Override
  public void onOpen(ServerHandshake handshakedata) {
    System.out.println("Connected to HomeAssistant WebSocket API");
    latch.countDown();
  }

  @Override
  public void onMessage(String message) {
    System.out.println("Received message from HomeAssistant WebSocket API: " + message);
  }

  @Override
  public void onClose(int code, String reason, boolean remote) {
    System.out.println("Disconnected from HomeAssistant WebSocket API");
  }

  @Override
  public void onError(Exception ex) {
    System.err.println("Error occurred in HomeAssistant WebSocket API connection: " + ex.getMessage());
  }

  public void awaitConnection() throws InterruptedException {
    latch.await(5, TimeUnit.SECONDS);
  }

}

您可以使用以下代码来创建并连接到 HomeAssistant WebSocket API：

String url = "ws://localhost:8123/api/websocket";
String accessToken = "YOUR_ACCESS_TOKEN_HERE";

HomeAssistantWebSocketClient client = new HomeAssistantWebSocketClient(url, accessToken);
client.connect();
client.awaitConnection();

// Send a message to HomeAssistant WebSocket API
client.send("{\"type\": \"ping\"}");

// Disconnect from HomeAssistant WebSocket API
client.close();

请注意，您需要将 `url` 替换为您的 HomeAssistant WebSocket API URL，将 `accessToken` 替换为您的 HomeAssistant 访问令牌。此外，您需要根据您要发送的消息的类型和格式来更改 `client.send()` 方法的参数。