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| | |
| | | package com.ruoyi.common.utils; |
| | | |
| | | 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.security.SecureRandom; |
| | | import java.util.Arrays; |
| | | import java.util.Random; |
| | | import javax.imageio.ImageIO; |
| | | |
| | | /** |
| | | * éªè¯ç å·¥å
·ç±» |
| | | * |
| | | * @author ruoyi |
| | | */ |
| | | public class VerifyCodeUtils |
| | | { |
| | | // 使ç¨å°Algerianåä½ï¼ç³»ç»é没æçè¯éè¦å®è£
åä½ï¼åä½åªæ¾ç¤ºå¤§åï¼å»æäº1,0,i,oå ä¸ªå®¹ææ··æ·çå符 |
| | | public static final String VERIFY_CODES = "123456789ABCDEFGHJKLMNPQRSTUVWXYZ"; |
| | | |
| | | private static Random random = new SecureRandom(); |
| | | |
| | | /** |
| | | * 使ç¨ç³»ç»é»è®¤å符æºçæéªè¯ç |
| | | * |
| | | * @param verifySize éªè¯ç é¿åº¦ |
| | | * @return |
| | | */ |
| | | public static String generateVerifyCode(int verifySize) |
| | | { |
| | | return generateVerifyCode(verifySize, VERIFY_CODES); |
| | | } |
| | | |
| | | /** |
| | | * ä½¿ç¨æå®æºçæéªè¯ç |
| | | * |
| | | * @param verifySize éªè¯ç é¿åº¦ |
| | | * @param sources éªè¯ç åç¬¦æº |
| | | * @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(); |
| | | } |
| | | |
| | | /** |
| | | * è¾åºæå®éªè¯ç å¾çæµ |
| | | * |
| | | * @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); |
| | | |
| | | g2.setColor(Color.GRAY);// 设置边æ¡è² |
| | | g2.fillRect(0, 0, w, h); |
| | | |
| | | Color c = getRandColor(200, 250); |
| | | g2.setColor(c);// è®¾ç½®èæ¯è² |
| | | g2.fillRect(0, 2, w, h - 4); |
| | | |
| | | // ç»å¶å¹²æ°çº¿ |
| | | Random random = new Random(); |
| | | g2.setColor(getRandColor(160, 200));// 设置线æ¡çé¢è² |
| | | 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); |
| | | } |
| | | |
| | | // æ·»å åªç¹ |
| | | float yawpRate = 0.05f;// åªå£°ç |
| | | 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); |
| | | } |
| | | |
| | | shear(g2, w, h, c);// 使å¾çææ² |
| | | |
| | | 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); |
| | | } |
| | | |
| | | g2.dispose(); |
| | | ImageIO.write(image, "jpg", os); |
| | | } |
| | | |
| | | 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); |
| | | } |
| | | |
| | | } |
| | | } |
| | | } |