try { HttpClient httpclient = new DefaultHttpClient();    HttpPost httpPost = new HttpPost(sendUrl);    File uploadFile = new File("/Users/ethan/Downloads/test.jpg");    FileBody uploadFilePart = new FileBody(uploadFile);    MultipartEntity reqEntity = new MultipartEntity();    reqEntity.addPart("media", uploadFilePart);    httpPost.setEntity(reqEntity);    HttpResponse response = httpclient.execute(httpPost);    HttpEntity entity = response.getEntity();    if(entity!=null){ String result = EntityUtils.toString(entity,"UTF-8");        System.out.println(result);    } }catch (Exception e){ e.printStackTrace(); } 一直返回 {"errcode":47001,"errmsg":"data format error hint: [SAESjA04011548]"}