验证码 VerifyCodeUtil

我就是我 2022-12-24 02:59 126阅读 0赞

package com.remark.fintech.titan.common.utils;
    
    import javax.imageio.ImageIO;
    import java.awt.*;
    import java.awt.geom.AffineTransform;
    import java.awt.image.BufferedImage;
    import java.io.IOException;
    import java.io.OutputStream;
    import java.util.Arrays;
    import java.util.Random;
    
    public class VerifyCodeUtil {
    
        public static final String VERIFY_CODES = "0123456789ABCDEFGHJKLMNPQRSTUVWXYZ";
    
    
        public static  int length = 4;
    
    
    
        public static  int size = 40;
    
    
    
        public static  int Dsize = 1000;
    
        public static  int width = 200;
        public static  int height = 80;
    
    
        private static Random random = new Random();
    
        public static int getLength() {
            return length;
        }
    
        public static int getWidth() {
            return width;
        }
    
        public static int getHeight() {
            return height;
        }
    
        /**
         *
         * VerifyCodeUtil包含静态方法，只要设置相关参数就可以随机生成想要结果的验证码图片。
         * VerifyCodeUtil.setHeight(37);// 设置验证码高度
         * VerifyCodeUtil.setWidth(83);// 设置验证码宽度
         * VerifyCodeUtil.setSize(10);// 设置验证码干扰线的条数
         * VerifyCodeUtil.setDsize(10);// 设置验证码干扰点的个数
         * VerifyCodeUtil.setSize(4);//设置验证码的长度
         * String indentycode=VerifyCodeUtil.generateVerifyCode();// 随机生成验证码 返回字符串验证码（默认为4为）
         * request.getSession().setAttribute("code", indentycode);// 一般存储在session域内用于登录的校验（JavaWeb项目）
         * BufferedImage image = VerifyCodeUtil.getBufferedImage(indentycode);// 将随机验证码字符串传入生成图片
         * ImageIO.write(image, "jpg", response.getOutputStream());// 在HttpServletResponse中有内置方法getOutputStream()，可以将响应转换成输出流，在通过ImageIO对象的write方法就可以输出到前台页面上去了。
         * @Author lhj
         * @Description //TODO
         * @Date 16:40 2020/6/28 0028
         **/
    
        public static String generateVerifyCode() {
            return generateVerifyCode(length, VERIFY_CODES);
        }
    
    
        public static String generateVerifyCode(int length, String sources) {
            if (sources == null || sources.length() == 0) {
                sources = VERIFY_CODES;
            }
            int codesLen = sources.length();
            Random rand = new Random(System.currentTimeMillis());
            StringBuilder verifyCode = new StringBuilder(length);
            for (int i = 0; i < length; i++) {
                verifyCode.append(sources.charAt(rand.nextInt(codesLen - 1)));
            }
            return verifyCode.toString();
        }
    
    
    
        public static void outputImage(OutputStream os, String code) throws IOException {
            BufferedImage image=getBufferedImage(code);
            ImageIO.write(image, "jpg", os);
        }
    
        public static BufferedImage getBufferedImage(String code)
        {
            int verifySize = code.length();
            BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
            Random rand = new Random();
            Graphics2D g2 = image.createGraphics();
            g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
    
            Color[] colors = new Color[5];
            Color[] colorSpaces = new Color[] { Color.WHITE, Color.CYAN, Color.GRAY, Color.LIGHT_GRAY, Color.MAGENTA,
                    Color.ORANGE, Color.PINK, Color.YELLOW };
            float[] fractions = new float[colors.length];
            for (int i = 0; i < colors.length; i++) {
                colors[i] = colorSpaces[rand.nextInt(colorSpaces.length)];
                fractions[i] = rand.nextFloat();
            }
            Arrays.sort(fractions);
    
            g2.setColor(Color.pink);// ���ñ߿�ɫ
            g2.fillRect(0, 0, width, height);
    
            Color c = getRandColor(200, 250);
            g2.setColor(c);// ���ñ���ɫ
            g2.fillRect(0, 2, width, height - 4);
    
    
            Random random = new Random();
            g2.setColor(getRandColor(160, 200));// ������������ɫ
            for (int i = 0; i < size; i++) {
                int x = random.nextInt(width - 1);
                int y = random.nextInt(height - 1);
                int xl = random.nextInt(6) + 1;
                int yl = random.nextInt(12) + 1;
                g2.drawLine(x, y, x + xl + 40, y + yl + 20);
            }
    
    
    
    
            float yawpRate = 0.05f;
    
            for (int i = 0; i < Dsize; i++) {
                int x = random.nextInt(width);
                int y = random.nextInt(height);
                int rgb = getRandomIntColor();
                image.setRGB(x, y, rgb);
            }
    
            shear(g2, width, height, c);
    
            g2.setColor(getRandColor(100, 160));
            int fontSize = height - 4;
            Font font = new Font("Algerian", Font.ITALIC, fontSize);
            g2.setFont(font);
            char[] chars = code.toCharArray();
            for (int i = 0; i < verifySize; i++) {
                AffineTransform affine = new AffineTransform();
                affine.setToRotation(Math.PI / 4 * rand.nextDouble() * (rand.nextBoolean() ? 1 : -1),
                        (width / verifySize) * i + fontSize / 2, height / 2);
                g2.setTransform(affine);
                g2.drawChars(chars, i, 1, ((width - 10) / verifySize) * i + 5, height / 2 + fontSize / 2 - 10);
            }
    
            g2.dispose();
            return image;
        }
        private static Color getRandColor(int fc, int bc) {
            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 int getRandomIntColor() {
            int[] rgb = getRandomRgb();
            int color = 0;
            for (int c : rgb) {
                color = color << 8;
                color = color | c;
            }
            return color;
        }
    
        private static int[] getRandomRgb() {
            int[] rgb = new int[3];
            for (int i = 0; i < 3; i++) {
                rgb[i] = random.nextInt(255);
            }
            return rgb;
        }
    
        private static void shear(Graphics g, int w1, int h1, Color color) {
            shearX(g, w1, h1, color);
            shearY(g, w1, h1, color);
        }
    
        private static void shearX(Graphics g, int w1, int h1, Color color) {
    
            int period = random.nextInt(2);
    
            boolean borderGap = true;
            int frames = 1;
            int phase = random.nextInt(2);
    
            for (int i = 0; i < h1; i++) {
                double d = (double) (period >> 1)
                        * Math.sin((double) i / (double) period + (6.2831853071795862D * (double) phase) / (double) frames);
                g.copyArea(0, i, w1, 1, (int) d, 0);
                if (borderGap) {
                    g.setColor(color);
                    g.drawLine((int) d, i, 0, i);
                    g.drawLine((int) d + w1, i, w1, i);
                }
            }
    
        }
    
        private static void shearY(Graphics g, int w1, int h1, Color color) {
    
            int period = random.nextInt(40) + 10; // 50;
    
            boolean borderGap = true;
            int frames = 20;
            int phase = 7;
            for (int i = 0; i < w1; i++) {
                double d = (double) (period >> 1)
                        * Math.sin((double) i / (double) period + (6.2831853071795862D * (double) phase) / (double) frames);
                g.copyArea(i, 0, 1, h1, 0, (int) d);
                if (borderGap) {
                    g.setColor(color);
                    g.drawLine(i, (int) d, i, 0);
                    g.drawLine(i, (int) d + h1, i, h1);
                }
    
            }
    
        }
    
        public static int getSize() {
            return size;
        }
    
        public static void setSize(int size) {
            VerifyCodeUtil.size = size;
        }
    
        public static int getDsize() {
            return Dsize;
        }
    
        public static void setDsize(int dsize) {
            Dsize = dsize;
        }
    
        public static Random getRandom() {
            return random;
        }
    
        public static void setRandom(Random random) {
            VerifyCodeUtil.random = random;
        }
    
        public static String getVerifyCodes() {
            return VERIFY_CODES;
        }
    
        public static void setLength(int length) {
            VerifyCodeUtil.length = length;
        }
    
        public static void setWidth(int width) {
            VerifyCodeUtil.width = width;
        }
    
        public static void setHeight(int height) {
            VerifyCodeUtil.height = height;
        }
    
    }