如何使用Google HttpClient API进行HTTP POST？

如何使用Google HTTP Client Library for Java完成带有参数的帖子

这不起作用：

 public void post() throws Exception {

      HttpRequestFactory requestFactory
              = new NetHttpTransport().createRequestFactory();

      String myPostURL = "https://my-post-url" 

      //String params = "{'userid': 'me', 'password': 'jt48e!'}";
      String params = "{\"userid\": \"me\", \"password\": \"jt48e!\"}";
      HttpContent content = ByteArrayContent.fromString("application/json", params);
      
      GenericUrl url = new GenericUrl(myPostURL);
      HttpRequest request = requestFactory.buildPostRequest(url, content);

      HttpResponse response = request.execute();
   }

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我在呼叫时收到一条错误消息：

Bad request.  Parameter userid not found. Parameter password not found.
at com.google.api.client.http.HttpRequest.execute(HttpRequest.java:1113)

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Google HttpClient库java

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