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204
eladmin-system/src/main/java/me/zhengjie/modules/security/utils/VerifyCodeUtils.java
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| package me.zhengjie.modules.security.utils; | ||
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| import java.awt.Color; | ||
| import java.awt.Font; | ||
| import java.awt.Graphics; | ||
| import java.awt.Graphics2D; | ||
| import java.awt.RenderingHints; | ||
| 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; | ||
| import javax.imageio.ImageIO; | ||
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| /** | ||
| * @author https://blog.csdn.net/ruixue0117/article/details/22829557 | ||
| * @date 2019-6-20 17:28:53 | ||
| */ | ||
| public class VerifyCodeUtils{ | ||
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| //使用到Algerian字体，系统里没有的话需要安装字体，字体只显示大写，去掉了1,0,i,o几个容易混淆的字符 | ||
| public static final String VERIFY_CODES = "23456789ABCDEFGHJKLMNPQRSTUVWXYZ"; | ||
| private static Random random = new Random(); | ||
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| /** | ||
| * 使用系统默认字符源生成验证码 | ||
| * @param verifySize 验证码长度 | ||
| * @return | ||
| */ | ||
| public static String generateVerifyCode(int verifySize){ | ||
| return generateVerifyCode(verifySize, VERIFY_CODES); | ||
| } | ||
| /** | ||
| * 使用指定源生成验证码 | ||
| * @param verifySize 验证码长度 | ||
| * @param sources 验证码字符源 | ||
| * @return | ||
| */ | ||
| public static String generateVerifyCode(int verifySize, 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(verifySize); | ||
| for(int i = 0; i < verifySize; i++){ | ||
| verifyCode.append(sources.charAt(rand.nextInt(codesLen-1))); | ||
| } | ||
| return verifyCode.toString(); | ||
| } | ||
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| /** | ||
| * 输出指定验证码图片流 | ||
| * @param w | ||
| * @param h | ||
| * @param os | ||
| * @param code | ||
| * @throws IOException | ||
| */ | ||
| public static void outputImage(int w, int h, OutputStream os, String code) throws IOException{ | ||
| int verifySize = code.length(); | ||
| BufferedImage image = new BufferedImage(w, h, 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); | ||
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| g2.setColor(Color.GRAY);// 设置边框色 | ||
| g2.fillRect(0, 0, w, h); | ||
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| Color c = getRandColor(200, 250); | ||
| g2.setColor(c);// 设置背景色 | ||
| g2.fillRect(0, 2, w, h-4); | ||
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| //绘制干扰线 | ||
| Random random = new Random(); | ||
| g2.setColor(getRandColor(160, 200));// 设置线条的颜色 | ||
| for (int i = 0; i < 20; i++) { | ||
| int x = random.nextInt(w - 1); | ||
| int y = random.nextInt(h - 1); | ||
| int xl = random.nextInt(6) + 1; | ||
| int yl = random.nextInt(12) + 1; | ||
| g2.drawLine(x, y, x + xl + 40, y + yl + 20); | ||
| } | ||
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| // 添加噪点 | ||
| float yawpRate = 0.05f;// 噪声率 | ||
| int area = (int) (yawpRate * w * h); | ||
| for (int i = 0; i < area; i++) { | ||
| int x = random.nextInt(w); | ||
| int y = random.nextInt(h); | ||
| int rgb = getRandomIntColor(); | ||
| image.setRGB(x, y, rgb); | ||
| } | ||
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| shear(g2, w, h, c);// 使图片扭曲 | ||
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| g2.setColor(getRandColor(100, 160)); | ||
| int fontSize = h-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), (w / verifySize) * i + fontSize/2, h/2); | ||
| g2.setTransform(affine); | ||
| g2.drawChars(chars, i, 1, ((w-10) / verifySize) * i + 5, h/2 + fontSize/2 - 10); | ||
| } | ||
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| g2.dispose(); | ||
| ImageIO.write(image, "jpg", os); | ||
| } | ||
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| 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); | ||
| } | ||
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| private static int getRandomIntColor() { | ||
| int[] rgb = getRandomRgb(); | ||
| int color = 0; | ||
| for (int c : rgb) { | ||
| color = color << 8; | ||
| color = color | c; | ||
| } | ||
| return color; | ||
| } | ||
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| private static int[] getRandomRgb() { | ||
| int[] rgb = new int[3]; | ||
| for (int i = 0; i < 3; i++) { | ||
| rgb[i] = random.nextInt(255); | ||
| } | ||
| return rgb; | ||
| } | ||
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| private static void shear(Graphics g, int w1, int h1, Color color) { | ||
| shearX(g, w1, h1, color); | ||
| shearY(g, w1, h1, color); | ||
| } | ||
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| private static void shearX(Graphics g, int w1, int h1, Color color) { | ||
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| int period = random.nextInt(2); | ||
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| boolean borderGap = true; | ||
| int frames = 1; | ||
| int phase = random.nextInt(2); | ||
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| 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); | ||
| } | ||
| } | ||
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| } | ||
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| private static void shearY(Graphics g, int w1, int h1, Color color) { | ||
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| int period = random.nextInt(40) + 10; // 50; | ||
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| 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); | ||
| } | ||
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| } | ||
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| } | ||
| } |
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