java - 使用Google API中的com.google.api.client.http.HttpRequest对象发送POST请求

我必须发送具有以下结构的POST请求。

    POST https://www.googleapis.com/fusiontables/v1/tables
    Authorization: /* auth token here */
    Content-Type: application/json

    {
     "name": "Insects",
     "columns": [
     {
        "name": "Species",
        "type": "STRING"
     },
     {
         "name": "Elevation",
         "type": "NUMBER"
     },
    {
         "name": "Year",
         "type": "DATETIME"
    }
      ],
   "description": "Insect Tracking Information.",
   "isExportable": true
    }

我正在使用以下代码发送POST请求，但收到的响应为“400 Bad Request”

String PostUrl = "https://www.googleapis.com/fusiontables/v1/tables";
HttpRequestFactory requestFactory = HTTP_TRANSPORT.createRequestFactory(credential);

//generate the REST based URL
GenericUrl url = new GenericUrl(PostUrl.replaceAll(" ", "%20"));
//make POST request

String requestBody = "{'name': 'newIndia','columns': [{'name': 'Species','type': 'STRING'}],'description': 'Insect Tracking Information.','isExportable': true}";

HttpRequest request = requestFactory.buildPostRequest(url, ByteArrayContent.fromString(null, requestBody));
request.getHeaders().setContentType("application/json");
// Google servers will fail to process a POST/PUT/PATCH unless the Content-Length
// header >= 1
//request.setAllowEmptyContent(false);
System.out.println("HttpRequest request" + request);
HttpResponse response = request.execute();

我想知道是否有任何从事过此类似任务的人员可以帮助我按照此问题开头提到的POST请求格式发送POST请求。

最佳答案

我已经使用以下代码发送了POST请求

String requestBody = "{'name': 'newIndia','columns': [{'name': 'Species','type': 'STRING'}],'description': 'Insect Tracking Information.','isExportable': true}";
HttpRequest request = requestFactory.buildPostRequest(url, ByteArrayContent.fromString("application/json", requestBody));
request.getHeaders().setContentType("application/json");