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public class CheckCodeUtils { private static final String VERIFY_CODES = "123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"; private static final Random RANDOM = new Random(); private static final String[] patch = {"00000", "0000", "000", "00", "0", ""};
public static Map<String, byte[]> generateCode() throws Exception { String path = "src/main/resources/static/checkCode.jpg"; OutputStream fos = Files.newOutputStream(Paths.get(path)); Map<String, byte[]> map = new HashMap<>(8); String checkCode = outputVerifyImage(100, 40, fos, 4); byte[] byte64 = getByte64(path); map.put(checkCode, byte64); return map; }
public static byte[] getByte64(String path) { File file = new File(path); FileInputStream fileInputStream = null; byte[] imgData = null; try { imgData = new byte[(int) file.length()]; fileInputStream = new FileInputStream(file); fileInputStream.read(imgData);
} catch (IOException e) { e.printStackTrace(); } finally { if (fileInputStream != null) { try { fileInputStream.close(); } catch (IOException e) { e.printStackTrace(); } } } return imgData; }
public static String generateTel(String tel) { int encryption = 44311688; long result = tel.hashCode() ^ encryption; result = result ^ System.currentTimeMillis(); String code = result < 0 ? (-result % 1000000) + "" : result % 1000000 + ""; return code + patch[code.length() - 1]; }
public static String outputVerifyImage(int width, int height, OutputStream os, int verifySize) throws IOException { String verifyCode = generateVerifyCode(verifySize); outputImage(width, height, os, verifyCode); return verifyCode; }
public static String generateVerifyCode(int verifySize) { return generateVerifyCode(verifySize, VERIFY_CODES); }
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(); }
public static String outputVerifyImage(int w, int h, File outputFile, int verifySize) throws IOException { String verifyCode = generateVerifyCode(verifySize); outputImage(w, h, outputFile, verifyCode); return verifyCode; }
public static void outputImage(int w, int h, File outputFile, String code) throws IOException { if (outputFile == null) { return; } File dir = outputFile.getParentFile(); if (!dir.exists()) { dir.mkdirs(); } try { outputFile.createNewFile(); FileOutputStream fos = new FileOutputStream(outputFile); outputImage(w, h, fos, code); fos.close(); } catch (IOException e) { throw e; } }
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); g2.fillRect(0, 0, w, h);
Color c = getRandColor(200, 250); g2.setColor(c); g2.fillRect(0, 2, w, h - 4);
Random random = new Random(); g2.setColor(getRandColor(160, 200)); 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); }
float yawpRate = 0.05f; 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);
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); 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;
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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