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【Java】Java 使用 Graphics2D 在图片上添加文字，并解决图片变红问题

完整案例

    public static void main(String[] args) {try {String filePath = "D:\\Workspace\\XunshuWorkspace\\engage\\engage-service\\uploadPath\\upload\\template\\register-certificate.jpg";Image src = Toolkit.getDefaultToolkit().getImage(filePath);BufferedImage image = BufferedImageBuilder.toBufferedImage(src);Graphics2D g = image.createGraphics();Font font = new Font("宋体", Font.BOLD, 80);g.setFont(font);g.setColor(Color.black);g.drawString("张三", 500, 950);g.drawString("522323199812345678", 1750, 950);String date = "2024-03-01";String end = "2024-03-11";g.drawString(date.substring(0, 4), 550, 1150);g.drawString(date.substring(5, 7), 950, 1150);g.drawString(date.substring(8, 10), 1250, 1150);g.drawString(end.substring(0, 4), 1650, 1150);g.drawString(end.substring(5, 7), 2000, 1150);g.drawString(end.substring(8, 10), 2350, 1150);g.drawString("耳鼻咽喉头颈外科", 1000, 1350);long day = DateUtil.betweenDay(DateUtil.parse(date), DateUtil.parse(end), true);g.drawString(String.valueOf(day), 2800, 1350);String currentDate = DateUtil.today();g.drawString(currentDate.substring(0, 4), 2320, 2100);g.drawString(currentDate.substring(5, 7), 2660, 2100);g.drawString(currentDate.substring(8, 10), 2900, 2100);g.dispose();// ServletOutputStream outputStream = ServletUtils.getResponse().getOutputStream();File output = new File(filePath.replace(".jpg", "-" + UUID.randomUUID() + ".jpg"));ImageIO.write(image, "jpg", output);} catch (IOException e) {throw new RuntimeException(e);}}/*** 使用 ImageIO.read(file); 压缩后的图片会变红改为使用* Toolkit.getDefaultToolkit().getImage*/public static class BufferedImageBuilder {public static BufferedImage toBufferedImage(Image image) {if (image instanceof BufferedImage) {return (BufferedImage) image;}// This code ensures that all the pixels in the image are loadedimage = new ImageIcon(image).getImage();BufferedImage bimage = null;GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();try {int transparency = Transparency.OPAQUE;GraphicsDevice gs = ge.getDefaultScreenDevice();GraphicsConfiguration gc = gs.getDefaultConfiguration();bimage = gc.createCompatibleImage(image.getWidth(null),image.getHeight(null), transparency);} catch (HeadlessException e) {// The system does not have a screen}if (bimage == null) {// Create a buffered image using the default color modelint type = BufferedImage.TYPE_INT_RGB;bimage = new BufferedImage(image.getWidth(null),image.getHeight(null), type);}// Copy image to buffered imageGraphics g = bimage.createGraphics();// Paint the image onto the buffered imageg.drawImage(image, 0, 0, null);g.dispose();return bimage;}}