怎么上传素材失败，有没有示例

DefaultYZClient yzClient = new DefaultYZClient();

        Token token2= new Token("");
        String img = "http://saas.zowoyoo.com/m2c/2/img/imgNone2.png";
        byte[] byt = YouZanUtil.urlTobyteString(img);
        File file = new File(new String(byt));
        System.out.println(file);
        
        YouzanMaterialsStoragePlatformImgUpload youzanMaterialsStoragePlatformImgUpload = new YouzanMaterialsStoragePlatformImgUpload();
        //创建参数对象,并设置参数
        YouzanMaterialsStoragePlatformImgUploadParams youzanMaterialsStoragePlatformImgUploadParams = new YouzanMaterialsStoragePlatformImgUploadParams();
        youzanMaterialsStoragePlatformImgUpload.setAPIParams(youzanMaterialsStoragePlatformImgUploadParams);                    
    youzanMaterialsStoragePlatformImgUploadParams.setImage(file);  
    System.out.println(youzanMaterialsStoragePlatformImgUploadParams.getImage());
        YouzanMaterialsStoragePlatformImgUploadResult result = null;
    try {
            result = yzClient.invoke(youzanMaterialsStoragePlatformImgUpload, token2, YouzanMaterialsStoragePlatformImgUploadResult.class);
            System.out.println(result.getData());
    } catch (Exception e) {
            System.out.println(JSONObject.fromObject(result));
        }

示例可参考接口文档：https://doc.youzanyun.com/doc#/content/API/1-372/detail/api/0/193

请注意参数的说明：
本地图片文件byte流，仅支持单个文件，每个文件不超过1MB。
https://doc.youzanyun.com/doc#/content/API/1-372/detail/api/0/193

注意：需要传入本地文件