版权声明:学习中。。。 https://blog.csdn.net/fangdengfu123/article/details/82623152
public class VerifyCodeUtils {
public static final String VERIFY_CODES = "23456789ABCDEFGHJKLMNPQRSTUVWXYZ";
public static final String VERIFY_NUMBER = "1234567890";
private static Random random = new Random();
public VerifyCodeUtils() {
}
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 = "23456789ABCDEFGHJKLMNPQRSTUVWXYZ";
}
int codesLen = sources.length();
Random rand = new Random(System.currentTimeMillis());
StringBuilder code = new StringBuilder(verifySize);
for (int i = 0; i < verifySize; ++i) {
code.append(sources.charAt(rand.nextInt(codesLen - 1)));
}
return code.toString();
}
public static String outputVerifyImage(int w, int h, File outputFile, int size) throws IOException {
String code = generateVerifyCode(size);
outputImage(w, h, outputFile, code);
return code;
}
public static void outputImage(int w, int h, File outputFile, String code) throws IOException {
if (outputFile != null) {
File dir = outputFile.getParentFile();
if (!dir.exists()){
dir.mkdirs();
}
outputFile.createNewFile();
FileOutputStream fos = new FileOutputStream(outputFile);
outputImage(w, h, (OutputStream)fos, code);
fos.close();
}
}
public static void outputImage(int w, int h, OutputStream os, String code) throws IOException {
int verifySize = code.length();
BufferedImage image = new BufferedImage(w, h, 1);
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));
int area;
int fontSize;
int x;
int y;
for(int i = 0; i < 20; ++i) {
area = random.nextInt(w - 1);
fontSize = random.nextInt(h - 1);
x = random.nextInt(6) + 1;
y = random.nextInt(12) + 1;
g2.drawLine(area, fontSize, area + x + 40, fontSize + y + 20);
}
float yawpRate = 0.05F;
area = (int)(yawpRate * (float)w * (float)h);
int i;
for(fontSize = 0; fontSize < area; ++fontSize) {
x = random.nextInt(w);
y = random.nextInt(h);
i = getRandomIntColor();
image.setRGB(x, y, i);
}
shear(g2, w, h, c);
g2.setColor(getRandColor(100, 160));
fontSize = h - 4;
Font font = new Font("Algerian", 2, fontSize);
g2.setFont(font);
char[] chars = code.toCharArray();
for(i = 0; i < verifySize; ++i) {
AffineTransform affine = new AffineTransform();
affine.setToRotation(0.7853981633974483D * rand.nextDouble() * (double)(rand.nextBoolean() ? 1 : -1), (double)(w / verifySize * i + fontSize / 2), (double)(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;
int[] var2 = rgb;
int var3 = rgb.length;
for(int var4 = 0; var4 < var3; ++var4) {
int c = var2[var4];
color <<= 8;
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 + 6.283185307179586D * (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;
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 + 6.283185307179586D * (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);
}
}
}
}