如何使用google api客户端库为java发送带有JSON数据的POST请求？

 <groupId>com.google.api-client</groupId>
 <artifactId>google-api-client</artifactId>
 <version>1.32.1</version>
</dependency>

implementation 'com.google.api-client:google-api-client:1.32.1'

import com.google.api.client.http.HttpTransport;
import com.google.api.client.http.javanet.NetHttpTransport;
import com.google.api.client.json.JsonFactory;
import com.google.api.client.json.jackson2.JacksonFactory;
import com.google.api.client.http.HttpRequestFactory;
import com.google.api.client.http.HttpRequestInitializer;

public class GoogleApiClient {
  private static final HttpTransport HTTP_TRANSPORT = new NetHttpTransport();
  private static final JsonFactory JSON_FACTORY = new JacksonFactory();

  public static HttpRequestFactory createRequestFactory(HttpRequestInitializer initializer) {
    return HTTP_TRANSPORT.createRequestFactory(initializer);
  }
}

import com.google.api.client.http.GenericUrl;
import com.google.api.client.http.HttpContent;
import com.google.api.client.http.HttpHeaders;
import com.google.api.client.http.HttpMediaType;
import com.google.api.client.http.HttpMethods;
import com.google.api.client.http.HttpRequest;
import com.google.api.client.http.HttpResponse;
import com.google.api.client.http.json.JsonHttpContent;
import com.google.api.client.json.JSONObjectParser;
import com.google.api.client.json.JsonObject;

public class Main {
  public static void main(String[] args) throws Exception {
    // 创建JSON数据
    JsonObject jsonData = new JsonObject();
    jsonData.addProperty("key", "value");

    // 创建HTTP请求
    HttpRequestFactory requestFactory = GoogleApiClient.createRequestFactory(null);
    HttpRequest request = requestFactory.buildRequest(
        HttpMethods.POST,
        new GenericUrl("https://example.com/api"),
        new JsonHttpContent(GoogleApiClient.JSON_FACTORY, jsonData)
    );

    // 设置请求头
    HttpHeaders headers = new HttpHeaders();
    headers.setContentType("application/json");
    request.setHeaders(headers);

    // 发送请求并处理响应
    HttpResponse response = request.execute();
    JSONObjectParser parser = new JSONObjectParser(GoogleApiClient.JSON_FACTORY);
    JsonObject responseJson = parser.parseAndClose(response.getContent(), StandardCharsets.UTF_8);
    System.out.println(responseJson);
  }
}