在Java中将文本转换为图像

奢华

我正在用Java为Visual Cryptography项目编写代码。我们想要为随机令牌（字母数字字符串）创建两个共享图像，以便当两个图像重叠时，令牌将被显示。现在-甚至在视觉加密部分开始之前，我都在尝试找到一种方法来将该字母数字令牌转换为图像，并且不知道从哪里开始。有什么建议？谢谢！

加布里埃尔·鲁伊（Gabriel Ruiu）

public class TextToGraphicConverter {



  public static void main(String[] args) throws Exception {
        BufferedImage image = new TextToGraphicConverter().convertTextToGraphic("my text", new Font("Arial", Font.PLAIN, 18));
        //write BufferedImage to file
        ImageIO.write(image, "png", new File("path-to-file.png"));
    }

    public BufferedImage convertTextToGraphic(String text, Font font) {

        BufferedImage img = new BufferedImage(1, 1, BufferedImage.TYPE_INT_ARGB);
        Graphics2D g2d = img.createGraphics();

        g2d.setFont(font);
        FontMetrics fm = g2d.getFontMetrics();
        int width = fm.stringWidth(text);
        int height = fm.getHeight();
        g2d.dispose();

        img = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);

        g2d = img.createGraphics();
        g2d.setRenderingHint(RenderingHints.KEY_ALPHA_INTERPOLATION, RenderingHints.VALUE_ALPHA_INTERPOLATION_QUALITY);
        g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
        g2d.setRenderingHint(RenderingHints.KEY_COLOR_RENDERING, RenderingHints.VALUE_COLOR_RENDER_QUALITY);
        g2d.setRenderingHint(RenderingHints.KEY_DITHERING, RenderingHints.VALUE_DITHER_ENABLE);
        g2d.setRenderingHint(RenderingHints.KEY_FRACTIONALMETRICS, RenderingHints.VALUE_FRACTIONALMETRICS_ON);
        g2d.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
        g2d.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
        g2d.setRenderingHint(RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_PURE);
        g2d.setFont(font);
        fm = g2d.getFontMetrics();
        g2d.setColor(Color.BLACK);
        g2d.drawString(text, 0, fm.getAscent());
        g2d.dispose();
        return img;
    }
}

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