ArkUI（eTS）如何实现本地图片保存？

ArkUI（eTS）如何实现本地图片保存？

鸿蒙java端代码

 ImagePacker imagePacker = ImagePacker.create();
        File file = new File(getExternalFilesDir(Environment.DIRECTORY_PICTURES), "new.jpeg");
        FileOutputStream outputStream = null;
        try {
            outputStream = new FileOutputStream(file);
        } catch (FileNotFoundException e) {
        }
        ImagePacker.PackingOptions packingOptions = new ImagePacker.PackingOptions();
        packingOptions.format = "image/jpeg";
        packingOptions.quality = 100;// 设置图片质量
        boolean result = imagePacker.initializePacking(outputStream, packingOptions);
        result = imagePacker.addImage(pixelMap);
        long dataSize = imagePacker.finalizePacking();

但是我想在ets上实现要怎么写？？？