如何从javafx.scene.image.Image对象中获取字节数组？

import javafx.scene.image.Image;
import javafx.scene.image.PixelFormat;
import javafx.scene.image.PixelReader;
import java.io.ByteArrayOutputStream;

public class ImageToByteArray {
    public static byte[] getImageBytes(Image image) {
        PixelReader pixelReader = image.getPixelReader();
        int width = (int) image.getWidth();
        int height = (int) image.getHeight();
        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();

        // 获取像素数据
        byte[] buffer = new byte[width * height * 4];
        pixelReader.getPixels(0, 0, width, height, PixelFormat.getByteBgraInstance(), buffer, 0, width * 4);

        try {
            outputStream.write(buffer);
        } catch (Exception e) {
            e.printStackTrace();
        }

        return outputStream.toByteArray();
    }

    public static void main(String[] args) {
        Image image = new Image("image.png");
        byte[] byteArray = getImageBytes(image);
        System.out.println("字节数组长度：" + byteArray.length);
    }
}