无法使用 Retrofit 2 上传图像

Question

我无法从 Retrofit 2 上传图像，请查看我的下面的代码

@Multipart
@POST("upload-image")
Call<UploadImageResponse> uploadFile(@Part MultipartBody.Part file, @Part("file") RequestBody name);

我调用的函数的执行方式是这样的，

// Uploading Image
public void uploadFile()
{
    // Map is used to multipart the file using okhttp3.RequestBody
    File file = new File(sellerActivity.mediaPath);

    // Parsing any Media type file
    RequestBody requestBody = RequestBody.create(MediaType.parse("image/*"), file);

    MultipartBody.Part fileToUpload = MultipartBody.Part.createFormData("file", file.getName(), requestBody);

    RequestBody filename = RequestBody.create(MediaType.parse("text/plain"), file.getName());

    Call<UploadImageResponse> call = apiService.uploadFile(fileToUpload, filename);

    call.enqueue(new Callback<UploadImageResponse>() {
        @Override
        public void onResponse(Call<UploadImageResponse> call, Response<UploadImageResponse> response) {
            if (response.isSuccessful())
            {
                System.out.println("Image Url: " + response.body().getImage() + " " + response.body().getDishesName());
                System.out.println("Image Message: " + response.raw());
            }
            else
            {
                System.out.println("Image Message: " + response.raw());
            }
        }

        @Override
        public void onFailure(Call<UploadImageResponse> call, Throwable t) {
            System.out.println("onFailure: " + t);
        }
    });
}

当我使用邮递员时我会这样做

我搜索并尝试了各种方法但没有成功。任何帮助将不胜感激。

Answer 1

您必须对多部分表单数据有清晰的了解，因此请阅读此链接和许多其他可用的链接。

答案是更改您的端点方法，如下所示：

@Multipart
@POST("upload-image")
Call<UploadImageResponse> uploadFile(@Part MultipartBody.Part file, @Part("dishes_name") RequestBody name);

您缺少为每个部分分配正确的键。

另外，更改实现如下：

// Uploading Image
public void uploadFile()
{
    // Map is used to multipart the file using okhttp3.RequestBody
    File file = new File(sellerActivity.mediaPath);

    // Parsing any Media type file
    RequestBody requestBody = RequestBody.create(MediaType.parse("multipart/form-data"), file);

    MultipartBody.Part fileToUpload = MultipartBody.Part.createFormData("image", file.getName(), requestBody);

    RequestBody filename = RequestBody.create(MediaType.parse("text/plain"), file.getName());

    Call<UploadImageResponse> call = apiService.uploadFile(fileToUpload, filename);

    call.enqueue(new Callback<UploadImageResponse>() {
        @Override
        public void onResponse(Call<UploadImageResponse> call, Response<UploadImageResponse> response) {
            if (response.isSuccessful())
            {
                System.out.println("Image Url: " + response.body().getImage() + " " + response.body().getDishesName());
                System.out.println("Image Message: " + response.raw());
            }
            else
            {
                System.out.println("Image Message: " + response.raw());
            }
        }

        @Override
        public void onFailure(Call<UploadImageResponse> call, Throwable t) {
            System.out.println("onFailure: " + t);
        }
    });
}

该方法中的第一个参数MultipartBody.Part.createFormData(keyName, fileName, requestBody)是多部分文件的键名，第二个参数是文件名，第三个参数是该部分的请求正文。关联。

我希望这能帮到您。