图片上传模块，如何将图片资源转化为ByteWrapper[]

在调用图片上传接口中的youzanMaterialsStoragePlatformImgUploadParams.setImage("file");，file的数据类型是ByteWrapper[]，如何将图片资源转化为ByteWrapper[]？ps：api图片上传接口参数与实际参数不符合。
java开发。

请参考：
YZClient client = new DefaultYZClient(new Token("**"));
        YouzanMaterialsStoragePlatformImgUploadParams youzanMaterialsStoragePlatformImgUploadParams = new YouzanMaterialsStoragePlatformImgUploadParams();
        youzanMaterialsStoragePlatformImgUploadParams.setImage(new ByteWrapper[] {new ByteWrapper("/Users/yangjie/Downloads/测试图片.jpeg")});
        YouzanMaterialsStoragePlatformImgUpload youzanMaterialsStoragePlatformImgUpload = new YouzanMaterialsStoragePlatformImgUpload(youzanMaterialsStoragePlatformImgUploadParams);
        YouzanMaterialsStoragePlatformImgUploadResult result = client.invoke(youzanMaterialsStoragePlatformImgUpload);
        System.out.println(JsonUtils.toJson(result));