我正在尝试使用CrowdFlower的API上传数据，为此我正在编写JAVA Package 器。我正在使用HttpClient Apache。
CrowdFlower给予的cURL示例如下：curl -T 'sampledata.xlsx' -H 'Content-Type: application/vnd.ms-excel' https://api.crowdflower.com/v1/jobs/upload.json?key={api_key}
下面是我的代码：

public InputStream HTTPmethodPostUpload (String authKey, File file) throws ClientProtocolException, IOException{

        HttpClient httpclient = new DefaultHttpClient();
        HttpPost httpPost = new HttpPost("https://api.crowdflower.com/v1/jobs/upload.json?key="+authKey);

        MultipartEntity mpEntity = new MultipartEntity();
        ContentBody cbody = new FileBody( file,"application/vnd.ms-excel");
        mpEntity.addPart("sampledata.xlsx", cbody );
        httpPost.setEntity(mpEntity);
        HttpResponse response = httpclient.execute(httpPost);
        HttpEntity entityResponse = response.getEntity();
        return  entityResponse.getContent(); }

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但是，它返回一个错误，并显示以下消息：

• {不可接受的格式，Content-Type必须是“formats”中列出的格式之一，但您发送了“multipart/form-data; boundary= yTuwTm 4 hWmnasxIMB 9dC-sxdELIGoNJVudjJdCz”"，“formats”：[“application/vnd.oasis.opendocument. spreadsheet”，“application/vnd.openxmlformats-officedocument.spreadsheetml.sheet”，“application/vnd.ms-excel”，“text/csv”，“text/plain”]}}*

我不太了解Apache HttpClient，所以我不明白我的代码中的问题在哪里。