改造将多个图像上传到单个密钥

Question

我正在使用Retrofit将图像上传到我的服务器。在这里，我需要为单个密钥上传多个图像。我已经尝试使用Postman Web客户端，它运行良好。这是截图。

以下是请求的键值对 SurveyImage：[file1，file2，file3];
PropertyImage：文件
DRA：jsonBody

我试着用Retrofit做同样的事情。但图像没有上传到服务器。这是我的代码 的 WebServicesAPI.java

public interface WebServicesAPI {
    @Multipart
    @POST(WebServices.UPLOAD_SURVEY)
    Call<UploadSurveyResponseModel> uploadSurvey(@Part MultipartBody.Part surveyImage, @Part MultipartBody.Part propertyImage, @Part("DRA") RequestBody dra);
}

以下是上传文件的方法。

 private void requestUploadSurvey() {
        File propertyImageFile = new File(surveyModel.getPropertyImagePath());
        RequestBody propertyImage = RequestBody.create(MediaType.parse("image/*"), propertyImageFile);
        MultipartBody.Part propertyImagePart = MultipartBody.Part.createFormData("PropertyImage", propertyImageFile.getName(), propertyImage);
        JSONObject requestBody = getRequestBody();
        RequestBody draBody = null;
        try {
            draBody = RequestBody.create(MediaType.parse("text/plain"), requestBody.toString(1));
            Log.d(TAG, "requestUploadSurvey: RequestBody : " + requestBody.toString(1));
        } catch (JSONException e) {
            e.printStackTrace();
        }
        MultipartBody.Builder builder = new MultipartBody.Builder();
        builder.setType(MultipartBody.FORM);
        MultipartBody surveyImage = null;

            for (SurveyModel.PictureModel model : surveyModel.getPicturesList()) {
                File file = new File(model.getImagePath());
                builder.addFormDataPart("SurveyImage", file.getName(),
                        RequestBody.create(MediaType.parse("image/*"), file));
            }
            surveyImage = builder.build();

        final WebServicesAPI webServicesAPI = RetrofitManager.getInstance().getRetrofit().create(WebServicesAPI.class);
        Call<UploadSurveyResponseModel> surveyResponse = null;

            surveyResponse = webServicesAPI.uploadSurvey(MultipartBody.Part.createFormData("SurveyImage", "SurveyImage", surveyImage), propertyImagePart, draBody);

        surveyResponse.enqueue(this);

        Log.d(TAG, "requestUploadSurvey: sent the request");
    }

请帮我解决这个问题。

Answer 1

我们可以使用MultipartBody.Part数组将图像数组上传到单个键。 这是解决方案
的 WebServicesAPI

public interface WebServicesAPI { 
    @Multipart
    @POST(WebServices.UPLOAD_SURVEY)
    Call<UploadSurveyResponseModel> uploadSurvey(@Part MultipartBody.Part[] surveyImage, @Part MultipartBody.Part propertyImage, @Part("DRA") RequestBody dra);
}

以下是上传文件的方法。

private void requestUploadSurvey() {
  File propertyImageFile = new File(surveyModel.getPropertyImagePath());
    RequestBody propertyImage = RequestBody.create(MediaType.parse("image/*"), propertyImageFile);
    MultipartBody.Part propertyImagePart = MultipartBody.Part.createFormData("PropertyImage", propertyImageFile.getName(), propertyImage);

    MultipartBody.Part[] surveyImagesParts = new MultipartBody.Part[surveyModel.getPicturesList().size()];

    for (int index = 0; index < surveyModel.getPicturesList().size(); index++) {
        Log.d(TAG, "requestUploadSurvey: survey image " + index + "  " + surveyModel.getPicturesList().get(index).getImagePath());
        File file = new File(surveyModel.getPicturesList().get(index).getImagePath());
        RequestBody surveyBody = RequestBody.create(MediaType.parse("image/*"), file);
        surveyImagesParts[index] = MultipartBody.Part.createFormData("SurveyImage", file.getName(), surveyBody);
    }

    final WebServicesAPI webServicesAPI = RetrofitManager.getInstance().getRetrofit().create(WebServicesAPI.class);
    Call<UploadSurveyResponseModel> surveyResponse = null;
    if (surveyImagesParts != null) {
        surveyResponse = webServicesAPI.uploadSurvey(surveyImagesParts, propertyImagePart, draBody);
    }
    surveyResponse.enqueue(this);
}

Answer 2

我尝试过的最佳解决方案

<强> ApiInterface：

@Multipart
    @POST("person/img")
    Call<ResponseBody> upImageMany(@Part List<MultipartBody.Part> file);

<强>活动：

List<MultipartBody.Part> parts = new ArrayList<>();

for (int i=0; i < upFileList.size(); i++){
    parts.add(prepareFilePart("my_file["+i+"]", upFileList.get(i)));
}

private MultipartBody.Part prepareFilePart(String partName, Uri fileUri){

        File file = new File(getPath(fileUri));

        RequestBody requestBody = RequestBody.create(MediaType.parse(getContentResolver().getType(fileUri)), file);

        return MultipartBody.Part.createFormData(partName, file.getName(),requestBody);
    }

Answer 3

类createFormData的第一个参数@method MultipartBody.Part是一个字符串，它是＆＃39;键＆＃39;或输入名称，您可以将字符串images[]作为数组传递，稍后您可以使用后端语言处理它并循环它以获取位置（i）

的所有图像

check example