com.ueboot.core.utils.CaptchaUtils Maven / Gradle / Ivy
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package com.ueboot.core.utils;
import cn.hutool.captcha.CaptchaUtil;
import cn.hutool.captcha.LineCaptcha;
import cn.hutool.captcha.generator.RandomGenerator;
import com.ueboot.core.exception.BusinessException;
import lombok.extern.slf4j.Slf4j;
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.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Arrays;
import java.util.Random;
import javax.imageio.ImageIO;
/**
* 验证码生成工具
* @author yangkui
*/
@Slf4j
public class CaptchaUtils {
public static final String VERIFY_CODES = "23456789ABCDEFGHKMNPQRSTUVWXYZ";
private static Random random = new Random();
public CaptchaUtils() {
}
public static String generate(int captcha) {
return generate(captcha, "23456789ABCDEFGHKMNPQRSTUVWXYZ");
}
/**
* 使用hutool工具类生成验证码
* @param w 图片宽度
* @param h 图片高度
* @param codeCount 字符长度
* @return 生产好的验证码，可以从中获取到code和图片
*/
public static LineCaptcha getLineCaptcha(int w, int h,int codeCount){
if(codeCount<4){
codeCount =4;
}
RandomGenerator randomGenerator = new RandomGenerator("123456789abcdefghijklmnopqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ", codeCount);
LineCaptcha lineCaptcha = CaptchaUtil.createLineCaptcha(w, h,codeCount,50);
lineCaptcha.setGenerator(randomGenerator);
lineCaptcha.createCode();
return lineCaptcha;
}
public static String generate(int length, String sources) {
if(sources == null || sources.length() == 0) {
sources = "23456789ABCDEFGHKMNPQRSTUVWXYZ";
}
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 String outputVerifyImage(int w, int h, File outputFile, int length) throws IOException {
String verifyCode = generate(length);
outputImage(w, h, outputFile, verifyCode);
return verifyCode;
}
public static String outputVerifyImage(int w, int h, OutputStream os, int length) throws IOException {
String verifyCode = generate(length);
outputImage(w, h, os, verifyCode);
return verifyCode;
}
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();
}
try {
outputFile.createNewFile();
FileOutputStream fos = new FileOutputStream(outputFile);
outputImage(w, h, (OutputStream)fos, code);
fos.close();
} catch (IOException var6) {
throw var6;
}
}
}
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);
}
}
}
public static void main(String[] args) throws IOException {
File dir = new File("/Users/yangkui");
int w = 200;
int h = 80;
String verifyCode = generate(4);
File file = new File(dir, verifyCode + ".jpg");
outputImage(w, h, (File)file, verifyCode);
}
}