javafx 验证码生成和刷新

个人学习笔记

网上找到的验证码生成类，忘了哪找到的，注明下。

      import java.awt.BasicStroke;
      import java.awt.Color;
      import java.awt.Font;
      import java.awt.Graphics2D;
      import java.awt.RenderingHints;
      import java.awt.geom.QuadCurve2D;
      import java.awt.image.BufferedImage;
      import java.io.FileOutputStream;
      import java.io.IOException;
      import java.io.OutputStream;
      import java.util.Random;import javax.imageio.ImageIO;
      /**
      * 生成验证码
      * * @author dongyangyang
      * * @Date 2017/3/13 12:31
      * * @Version 1.0
      * *
      * */
       public class AuthCodeUtils {
       private final static Random random = new Random();
// 随机字体样式
private final static int[] fontStyle = { Font.HANGING_BASELINE, Font.ITALIC, Font.LAYOUT_LEFT_TO_RIGHT, Font.LAYOUT_NO_LIMIT_CONTEXT, Font.LAYOUT_NO_START_CONTEXT,
        Font.LAYOUT_RIGHT_TO_LEFT, Font.CENTER_BASELINE, Font.PLAIN, Font.ROMAN_BASELINE, Font.TRUETYPE_FONT, Font.TYPE1_FONT, Font.BOLD };

private final static String[] font = { "宋体","华文楷体","黑体","微软雅黑" };

private final static int[] xarr = { 23, 24, 19, 20, 21 };
private final static int[] yarr = { 20, 21, 22, 23, 24, 25, 16, 17, 18 };
private final static int[] font_size = { 28, 29, 30, 21, 22, 23, 24, 27, 26, 25 };

/**
 * 画随机码图
 * @param out
 *
 * @throws IOException
 */
public static void draw(OutputStream out, String value) throws IOException {
    int width = 110, height = 40;
    BufferedImage bi = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
    Graphics2D g = (Graphics2D) bi.getGraphics();
    g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
    g.setColor(randColor(240, 255));
    g.fillRect(0, 0, width, height);
    g.drawRect(1, 1, width - 2, height - 2);
    for (int i = 0; i < 10; i++) {
        g.setColor(randColor(150, 250));
        g.drawOval(random.nextInt(110), random.nextInt(24), 5 + random.nextInt(10), 5 + random.nextInt(10));
    }
    g.setFont(getFont());
    g.setColor(randColor(xarr[(int) (Math.random() * 5)], 254));
    for (int i = 0, len = value.length(); i < len; i++) {
        String rand = String.valueOf(value.charAt(i));
        int degree = random.nextInt(23);
        if (i % 2 == 0) {
            degree = degree * (-1);
        }
        int x = xarr[(int) (Math.random() * 5)] * i, y = yarr[(int) (Math.random() * 8)];
        g.rotate(Math.toRadians(degree), x, y);
        g.setColor(randColor(48, 254));
        g.drawString(rand, x + 8, y + 10);
        g.rotate(-Math.toRadians(degree), x, y);
    }
    // 图片中间线
    g.setColor(randColor(0, 200));
    // width是线宽,float型
    BasicStroke bs = new BasicStroke(2);
    g.setStroke(bs);
    // 画出曲线
    QuadCurve2D.Double curve = new QuadCurve2D.Double(0d, random.nextInt(height - 8) + 4, width / 2, height / 2, width, random.nextInt(height - 8) + 4);
    g.draw(curve);
    // 销毁图像
    g.dispose();
    ImageIO.write(bi, "png", out);
}

private static Font getFont() {
    return new Font(font[(int) (Math.random() * 4)], fontStyle[(int) (Math.random() * 12)], font_size[(int) (Math.random() * 10)]);
}

private static Color randColor(int fc, int bc) {// 给定范围获得随机颜色
    if (fc > 255) {
        fc = 255;
    }
    if (bc > 255) {
        bc = 255;
    }
    int r = fc + random.nextInt(bc - fc);
    int g = fc + random.nextInt(bc - fc);
    int b = fc + random.nextInt(bc - fc);
    return new Color(r, g, b);
}

private static char[] c = { 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'j', 'k', 'm', 'n', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', 'A', 'B', 'C', 'D', 'E', 'F',
        'G', 'H', 'J', 'K', 'L', 'M', 'N', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', '1', '3', '5', '6', '7', '8', '9' };

public static String getRandom(int size) {
    StringBuilder sb = new StringBuilder();
    for (int i = 0; i < size; i++) {
        sb.append(c[Math.abs(random.nextInt()) % c.length]);
    }
    return sb.toString();
}

public static void main(String[] args) throws IOException {
    for (int i = 1; i < 2; i++) {
        FileOutputStream out = new FileOutputStream("是你存放图片的地址"+ i +".png");
        draw(out, getRandom(4));
    }
}
}

调用

      public ImageView yzm;
      //每次点击都会生成新的验证码图片覆盖上一张
      public void shuaxin(MouseEvent mouseEvent) {
       for (int i = 1; i < 2; i++) {
        FileOutputStream out = null;
        try {
            out = new FileOutputStream("是你存放图片的地址" + i + ".png");
            AuthCodeUtils.draw(out, getRandom(4));
        } catch (IOException e) {
            e.printStackTrace();
        }
        Image image = new Image("file:是你存放图片的地址.png");
        yzm.setImage(image);
    }
}

在Main中

      //启动就刷新一张验证码图
        ImageView yzm = (ImageView)root.lookup("#yzm");
        for (int i = 1; i < 2; i++) {
            FileOutputStream out = null;
            try {
                out = new FileOutputStream("这是你存放图片的地址" + i + ".png");
                AuthCodeUtils.draw(out, getRandom(4));
            } catch (IOException e) {
                e.printStackTrace();
            }
            javafx.scene.image.Image image = new Image("file:这是你存放图片的地址.png");
            yzm.setImage(image);
        }