如何使用Java压缩PNG图像 [英] how to compress a PNG image using Java

问题描述

您好，我想知道，如果有任何方式在Java中减少图像的大小（使用任何类型的压缩）作为一个BufferedImage加载并将被保存为PNG。

Hi I would like to know if there is any way in Java to reduce the size of an image (use any kind of compression) that was loaded as a BufferedImage and is going to be saved as an PNG.

也许是某种png imagewriteparam？

Maybe some sort of png imagewriteparam? I didnt find anything helpful so im stuck.

下载图片如何加载和保存示例

heres a sample how the image is loaded and saved

public static BufferedImage load(String imageUrl) {         
    Image image = new ImageIcon(imageUrl).getImage();
    bufferedImage = new BufferedImage(image.getWidth(null),
                                                    image.getHeight(null),
                                                    BufferedImage.TYPE_INT_ARGB);
    Graphics2D g2D = bufferedImage.createGraphics();
    g2D.drawImage(image, 0, 0, null);
    return bufferedImage;
}

public static void storeImageAsPng(BufferedImage image, String imageUrl) throws IOException {
    ImageIO.write(image, "png", new File(imageUrl));
}

推荐答案

a href =https://github.com/depsypher/pngtastic/ =nofollow> pngtastic 。这是一个纯java的图像优化器，可以缩小png图像在一定程度上。

You may want to try pngtastic. It's a pure java png image optimizer that can shrink may png images down to some degree.

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