WritableImage转BufferedImage

可以使用以下代码将 WritableImage 转换为 BufferedImage：

WritableImage writableImage = ...; // 获取 WritableImage 对象
BufferedImage bufferedImage = new BufferedImage(writableImage.getWidth(), writableImage.getHeight(), BufferedImage.TYPE_INT_ARGB);
WritableRaster writableRaster = bufferedImage.getRaster();
WritableRaster writableRaster2 = writableImage.getRaster();
int[] buffer = new int[writableImage.getWidth() * writableImage.getHeight()];
writableRaster2.getDataElements(0, 0, writableImage.getWidth(), writableImage.getHeight(), buffer);
writableRaster.setDataElements(0, 0, writableImage.getWidth(), writableImage.getHeight(), buffer);

这个代码将 WritableImage 转换成了 BufferedImage，并且将像素数据从 WritableRaster 转移到了 BufferedImage 的 WritableRaster 中。你可以使用 `bufferedImage` 变量来操作 BufferedImage 对象。