在heroku部署后上传图像时出错，“找不到Cloudinary平台适配器”？

Question

我用spring-boot应用创建了一个gradle应用程序，该应用程序的端点是将图像上传到cloudinary并返回cloudinary图像的URL。

以下是我的端点代码：

@PostMapping("/uploadPic")
public ResponseEntity<Object> upload(@RequestParam("file") MultipartFile multipartFile){
    String cloudinaryImgURL=null;
    try {
        File fileDir = new File("rowFiles");
        if (! fileDir.exists()){
            fileDir.mkdir();
        }
        String fileName=multipartFile.getOriginalFilename();
        File physicalFile=new File(multipartFile.getOriginalFilename());
        FileOutputStream fout=new FileOutputStream(fileDir.getName()+"/"+physicalFile);
        fout.write(multipartFile.getBytes());
        fout.close();
        File toUpload = new File("rowFiles/"+fileName);
        Cloudinary cloudinary = new Cloudinary();
        System.out.println("API Key:"+cloudinary.config.apiKey);
        Map params = ObjectUtils.asMap("public_id", "SRWRestImageBase/"+fileName);
        Map uploadResult = cloudinary.uploader().upload(toUpload, params);
        toUpload.delete();
        System.out.println("==============>>"+uploadResult.get("url"));
        cloudinaryImgURL=uploadResult.get("url").toString();
    } catch (Exception e) {
        System.out.println("upload:"+e.getMessage());
    }
    return new ResponseEntity<Object>("File uploaded successfully:"+cloudinaryImgURL,HttpStatus.OK);
}

我已经在本地计算机上的环境变量中使用CLOUDINARY_URL变量设置了cloudinary帐户凭据。 该端点可以在我的本地计算机上正常工作，并可以上传通过postman发送的图像。

我在heroku上部署了相同的应用程序，并在我的heroku应用程序CLOUDINARY_URL中设置了配置变量config variables。但是，当我通过邮递员到达该网址的端点时，它给出了以下heroku错误日志：

  2018-08-22T10:55:47.637562+00:00 app[web.1]:  the exception is: Can't find Cloudinary platform adapter [com.cloudinary.android.UploaderStrategy,com.cloudinary.http42.UploaderStrategy,com.cloudinary.http43.UploaderStrategy,com.cloudinary.http44.UploaderStrategy]
2018-08-22T10:55:47.637564+00:00 app[web.1]:  At:upload 
2018-08-22T10:55:47.637566+00:00 app[web.1]:  with arguments: [org.springframework.web.multipart.support.StandardMultipartHttpServletRequest$StandardMultipartFile@410b9d11]
2018-08-22T10:55:47.638002+00:00 app[web.1]:  and the full toString: ResponseEntity com.sware.SpringBoot_JPA_MySQL_Gradle_Project.rest_controllers.UserRestController.upload(MultipartFile)
2018-08-22T10:55:47.641005+00:00 app[web.1]: 2018-08-22 10:55:47.640 ERROR 4 --- [io-47964-exec-9] o.a.c.c.C.[.[.[/].[dispatcherServlet]    : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Handler dispatch failed; nested exception is java.lang.UnknownError: Can't find Cloudinary platform adapter [com.cloudinary.android.UploaderStrategy,com.cloudinary.http42.UploaderStrategy,com.cloudinary.http43.UploaderStrategy,com.cloudinary.http44.UploaderStrategy]] with root cause
2018-08-22T10:55:47.641008+00:00 app[web.1]: 
2018-08-22T10:55:47.641010+00:00 app[web.1]: java.lang.UnknownError: Can't find Cloudinary platform adapter [com.cloudinary.android.UploaderStrategy,com.cloudinary.http42.UploaderStrategy,com.cloudinary.http43.UploaderStrategy,com.cloudinary.http44.UploaderStrategy]
2018-08-22T10:55:47.641012+00:00 app[web.1]:    at com.cloudinary.Cloudinary.loadStrategies(Cloudinary.java:73) ~[cloudinary-core-1.19.0.jar!/:na]
2018-08-22T10:55:47.641014+00:00 app[web.1]:    at com.cloudinary.Cloudinary.<init>(Cloudinary.java:99) ~[cloudinary-core-1.19.0.jar!/:na]
2018-08-22T10:55:47.641016+00:00 app[web.1]:    at com.sware.SpringBoot_JPA_MySQL_Gradle_Project.rest_controllers.UserRestController.upload(UserRestController.java:55) ~[classes!/:na]
2018-08-22T10:55:47.641018+00:00 app[web.1]:    at com.sware.SpringBoot_JPA_MySQL_Gradle_Project.rest_controllers.UserRestController$$FastClassBySpringCGLIB$$e380b026.invoke(<generated>) ~[classes!/:na]
2018-08-22T10:55:47.641019+00:00 app[web.1]:    at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204) ~[spring-core-4.3.11.RELEASE.jar!/:4.3.11.RELEASE]
2018-08-22T10:55:47.641021+00:00 

经过一番研究，我认为我必须在heroku上的应用程序中添加cloudinary-add-on，所以我试图在heroku的资源选项卡上添加免费版本，但这是在询问我我的credit card详细信息我选择了免费版本。

所以任何人都可以指导我如何解决这个问题。我不想为cloudinary-add-on付费，因为我没有将这个应用程序开发为商业用途。或任何解决此异常的方法。

在使用此功能方面苦苦挣扎，在成功部署之后，我将尝试撰写有关此完整过程的文章。 预先感谢。