java - ImageIO : gif to jpeg 问题 -> 图像变成粉红色

Question

我正在尝试使用 imageIO 将 gif 转换为 jpeg，但生成的图像是粉红色的......有人可以帮忙吗？

public byte[] convert(byte[] bytes)
throws Exception {
    ByteArrayInputStream inputStream = new ByteArrayInputStream(bytes);
    BufferedImage bufferedImage = ImageIO.read(inputStream); 
    ByteArrayOutputStream osByteArray = new ByteArrayOutputStream();
    ImageOutputStream outputStream = ImageIO.createImageOutputStream(osByteArray);
    ImageIO.write(bufferedImage, "jpg", outputStream);
    outputStream.flush();
    outputStream.close();
    return osByteArray.toByteArray();
}

Answer 1

也许，粉红色被定义为 gif 图像的透明度颜色。如果是这样，以下示例可能会起作用。基本上，创建一个新图像并将“背景颜色”明确设置为传入的任何内容。

public static byte[] convert(byte[] bytes, Color backgroundColor) throws Exception
{
    ByteArrayInputStream inputStream = new ByteArrayInputStream(bytes);
    BufferedImage bufferedImage = ImageIO.read(inputStream);
    BufferedImage newBi = new BufferedImage(bufferedImage.getWidth(), bufferedImage.getHeight(), BufferedImage.TYPE_INT_RGB);
    Graphics2D g2d = (Graphics2D) newBi.getGraphics();
    g2d.drawImage(bufferedImage, 0, 0, bufferedImage.getWidth(), bufferedImage.getHeight(), backgroundColor, null);
    bufferedImage.getHeight(), null);
    ByteArrayOutputStream osByteArray = new ByteArrayOutputStream();
    ImageOutputStream outputStream = ImageIO.createImageOutputStream(osByteArray);
    ImageIO.write(newBi, "jpg", outputStream);
    outputStream.flush();
    outputStream.close();
    return osByteArray.toByteArray();
}

看起来这可能是相关的。