Java BufferedImage设置透明背景

方式一

从网上搜索出来的方案

BufferedImage bufferedImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
Graphics2D graphics = bufferedImage.createGraphics();
bufferedImage = graphics.getDeviceConfiguration().createCompatibleImage(width, height, Transparency.TRANSLUCENT);
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方式二

稍微精简

BufferedImage bufferedImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
BufferedImageGraphicsConfig config = BufferedImageGraphicsConfig.getConfig(bufferedImage);
bufferedImage =config.createCompatibleImage(width, height, Transparency.TRANSLUCENT);
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方式三

最底层代码

ColorModel cm = ColorModel.getRGBdefault();
WritableRaster wr = cm.createCompatibleWritableRaster(width, height);
BufferedImage bufferedImage = new BufferedImage(cm, wr, cm.isAlphaPremultiplied(), null);
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转载于:https://juejin.im/post/5cc156b75188252d862b5e0d