Java httpClient Post调用小程序OCR身份证识别，地址：https://api.weixin.qq.com/cv/ocr/idcard?， 返回错误信息：{"errcode":41005,"errmsg":"media data missing hint: [Mu3GOA0088w512] rid: 62e95228-4d4d74bf-24d67d7e"}。 Java 代码示例： public static String sendHttpPostForm(String httpUrl, MultipartFile file) { HttpPost httpPost = new HttpPost(httpUrl); try { File f = new File("/Users/heqi/Documents/tmp/" + file.getOriginalFilename()); file.transferTo(f); FileBody d = new FileBody(f, ContentType.MULTIPART_FORM_DATA, file.getOriginalFilename()); HttpEntity httpEntity = MultipartEntityBuilder.create() .setCharset(StandardCharsets.UTF_8) .setContentType(ContentType.MULTIPART_FORM_DATA) .setMode(HttpMultipartMode.BROWSER_COMPATIBLE) .addPart("img", d) .build(); httpPost.setEntity(httpEntity); } catch (IOException e) { e.printStackTrace(); } return sendHttpPost(httpPost); } 请问这是哪里传错参数了吗？