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package com.test.test;
import java.awt.AlphaComposite;
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.ByteArrayInputStream;
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;
import org.apache.log4j.Logger;
/**
* 验证码工具类：
* 随机字体、字体样式、字体大小（验证码图片宽度 - 8 ~ 验证码图片宽度 + 10）
* 彩色字符 每个字符的颜色随机，一定会不相同
* 随机字符 阿拉伯数字 + 小写字母 + 大写字母
* 3D中空自定义字体，需要单独使用，只有阿拉伯数字和大写字母
* gif支持动态输出
* 2017-06-09 解决压测时自定义字符字体不停的new，内存溢出问题。因为自定义字体不会变，提成static,建议用64bit jdk，自定义自动字符串太长，32bit偶尔编译会报错字符串太长
* @author Anttu
* @date 2017年5月9日 下午7:27:55
*/
public class RandonImgCodeUtil
{
private static Logger logger = Logger.getLogger(RandomVerifyImgCodeUtil.class);
/**
* 随机类
*/
private static Random random = new Random();
// 放到session中的key
public static final String RANDOMCODEKEY = "RANDOMVALIDATECODEKEY";
// 验证码来源范围，去掉了0,1,I,O,l,o几个容易混淆的字符
public static final String VERIFY_CODES = "23456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnpqrstuvwxyz";
private static ImgFontByte imgFontByte = new ImgFontByte();
private static Font baseFont;
static
{
try
{
baseFont = Font.createFont(Font.TRUETYPE_FONT,
RandomVerifyImgCodeUtils.class.getClassLoader().getResourceAsStream("fonts/ActionJackson.TTF"));
}
catch (FontFormatException e)
{
logger.error("new img font font format failed. e: " + e.getMessage(), e);
}
catch (IOException e)
{
logger.error("new img font io failed. e: " + e.getMessage(), e);
}
}
// 字体类型
private static String[] fontName =
{
"Algerian", "Arial", "Arial Black", "Agency FB", "Calibri", "Cambria", "Gadugi", "Georgia", "Consolas", "Comic Sans MS", "Courier New",
"Gill sans", "Time News Roman", "Tahoma", "Quantzite", "Verdana"
};
// 字体样式
private static int[] fontStyle =
{
Font.BOLD, Font.ITALIC, Font.ROMAN_BASELINE, Font.PLAIN, Font.BOLD + Font.ITALIC
};
// 颜色
private static Color[] colorRange =
{
Color.WHITE, Color.CYAN, Color.GRAY, Color.LIGHT_GRAY, Color.MAGENTA, Color.ORANGE, Color.PINK, Color.YELLOW, Color.GREEN, Color.BLUE,
Color.DARK_GRAY, Color.BLACK, Color.RED
};
/**
* 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
*/
private 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();
}
/**
* 输出指定验证码图片流
*
* @param w 验证码图片的宽
* @param h 验证码图片的高
* @param os 流
* @param code 验证码
* @param type 场景类型，login：登录，
* coupons：领券 登录清晰化，领券模糊化
* 3D: 3D中空自定义字体
* GIF：普通动态GIF
* GIF3D：3D动态GIF
* mix2: 普通字体和3D字体混合
* mixGIF: 混合动态GIF
* @throws IOException
*/
public static void outputImage(int w, int h, OutputStream os, String code, String type) 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 = colorRange;
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);// 设置边框色
g2.fillRect(0, 0, w, h);
Color c = getRandColor(200, 250);
g2.setColor(c);// 设置背景色
g2.fillRect(0, 2, w, h - 4);
char[] charts = code.toCharArray();
for (int i = 0; i < charts.length; i++)
{
g2.setColor(c);// 设置背景色
g2.setFont(getRandomFont(h, type));
g2.fillRect(0, 2, w, h - 4);
}
// 1.绘制干扰线
Random random = new Random();
g2.setColor(getRandColor(160, 200));// 设置线条的颜色
int lineNumbers = 20;
if (type.equals("login") || type.contains("mix") || type.contains("3D"))
{
lineNumbers = 20;
}
else if (type.equals("coupons"))
{
lineNumbers = getRandomDrawLine();
}
else
{
lineNumbers = getRandomDrawLine();
}
for (int i = 0; i < lineNumbers; 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);
}
// 2.添加噪点
float yawpRate = 0.05f;
if (type.equals("login") || type.contains("mix") || type.contains("3D"))
{
yawpRate = 0.05f; // 噪声率
}
else if (type.equals("coupons"))
{
yawpRate = getRandomDrawPoint(); // 噪声率
}
else
{
yawpRate = getRandomDrawPoint(); // 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);
}
// 3.使图片扭曲
shear(g2, w, h, c);
char[] chars = code.toCharArray();
Double rd = rand.nextDouble();
Boolean rb = rand.nextBoolean();
if (type.equals("login"))
{
for (int i = 0; i < verifySize; i++)
{
g2.setColor(getRandColor(100, 160));
g2.setFont(getRandomFont(h, type));
AffineTransform affine = new AffineTransform();
affine.setToRotation(Math.PI / 4 * rd * (rb ? 1 : -1), (w / verifySize) * i + (h - 4) / 2, h / 2);
g2.setTransform(affine);
g2.drawOval(random.nextInt(w), random.nextInt(h), 5 + random.nextInt(10), 5 + random.nextInt(10));
g2.drawChars(chars, i, 1, ((w - 10) / verifySize) * i + 5, h / 2 + (h - 4) / 2 - 10);
}
g2.dispose();
ImageIO.write(image, "jpg", os);
}
else if (type.contains("GIF") || type.contains("mixGIF"))
{
GifEncoder gifEncoder = new GifEncoder(); // gif编码类，这个利用了洋人写的编码类
// 生成字符
gifEncoder.start(os);
gifEncoder.setQuality(180);
gifEncoder.setDelay(150);
gifEncoder.setRepeat(0);
AlphaComposite ac3;
for (int i = 0; i < verifySize; i++)
{
g2.setColor(getRandColor(100, 160));
g2.setFont(getRandomFont(h, type));
for (int j = 0; j < verifySize; j++)
{
AffineTransform affine = new AffineTransform();
affine.setToRotation(Math.PI / 4 * rd * (rb ? 1 : -1), (w / verifySize) * i + (h - 4) / 2, h / 2);
g2.setTransform(affine);
g2.drawChars(chars, i, 1, ((w - 10) / verifySize) * i + 5, h / 2 + (h - 4) / 2 - 10);
ac3 = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, getAlpha(j, i, verifySize));
g2.setComposite(ac3);
g2.drawOval(random.nextInt(w), random.nextInt(h), 5 + random.nextInt(10), 5 + random.nextInt(10));
gifEncoder.addFrame(image);
image.flush();
}
}
gifEncoder.finish();
g2.dispose();
}
else
{
for (int i = 0; i < verifySize; i++)
{
g2.setColor(getRandColor(100, 160));
g2.setFont(getRandomFont(h, type));
AffineTransform affine = new AffineTransform();
affine.setToRotation(Math.PI / 4 * rd * (rb ? 1 : -1), (w / verifySize) * i + (h - 4) / 2, h / 2);
g2.setTransform(affine);
g2.drawOval(random.nextInt(w), random.nextInt(h), 5 + random.nextInt(10), 5 + random.nextInt(10));
g2.drawChars(chars, i, 1, ((w - 10) / verifySize) * i + 5, h / 2 + (h - 4) / 2 - 10);
}
g2.dispose();
ImageIO.write(image, "jpg", os);
}
}
/**
* 获取随机颜色
*
* @param fc
* @param bc
* @return
*/
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;
}
/**
* 随机字体、随机风格、随机大小
*
* @param h 验证码图片高
* @return
*/
private static Font getRandomFont(int h, String type)
{
// 字体
String name = fontName[random.nextInt(fontName.length)];
// 字体样式
int style = fontStyle[random.nextInt(fontStyle.length)];
// 字体大小
int size = getRandomFontSize(h);
if (type.equals("login"))
{
return new Font(name, style, size);
}
else if (type.equals("coupons"))
{
return new Font(name, style, size);
}
else if (type.contains("3D"))
{
return new ImgFontByte().getFont(size, style);
}
else if (type.contains("mix"))
{
int flag = random.nextInt(10);
if (flag > 4)
{
return new Font(name, style, size);
}
else
{
return new ImgFontByte().getFont(size, style);
}
}
else
{
return new Font(name, style, size);
}
}
/**
* 干扰线按范围获取随机数
*
* @return
*/
private static int getRandomDrawLine()
{
int min = 20;
int max = 155;
Random random = new Random();
return random.nextInt(max) % (max - min + 1) + min;
}
/**
* 噪点数率按范围获取随机数
*
* @return
*/
private static float getRandomDrawPoint()
{
float min = 0.05f;
float max = 0.1f;
return min + ((max - min) * new Random().nextFloat());
}
/**
* 获取字体大小按范围随机
*
* @param h 验证码图片高
* @return
*/
private static int getRandomFontSize(int h)
{
int min = h - 8;
// int max = 46;
Random random = new Random();
return random.nextInt(11) + min;
}
/**
* 3D中空字体自定义属性类
*
* @author Anttu
* @date 2017年5月15日 下午3:27:52
*/
static class ImgFontByte
{
public Font getFont(int fontSize, int fontStype)
{
try
{
Font font = baseFont;
if (baseFont == null)
{
font = Font.createFont(Font.TRUETYPE_FONT, RandomVerifyImgCodeUtils.class.getClassLoader()
.getResourceAsStream("fonts/ActionJackson.TTF"));
}
return font.deriveFont(fontStype, fontSize);
}
catch (Exception e)
{
return new Font("Arial", fontStype, fontSize);
}
}
}
/**
* 字符和干扰线扭曲
*
* @param g 绘制图形的java工具类
* @param w1 验证码图片宽
* @param h1 验证码图片高
* @param color 颜色
*/
private static void shear(Graphics g, int w1, int h1, Color color)
{
shearX(g, w1, h1, color);
shearY(g, w1, h1, color);
}
/**
* x轴扭曲
*
* @param g 绘制图形的java工具类
* @param w1 验证码图片宽
* @param h1 验证码图片高
* @param color 颜色
*/
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);
}
}
}
/**
* y轴扭曲
*
* @param g 绘制图形的java工具类
* @param w1 验证码图片宽
* @param h1 验证码图片高
* @param color 颜色
*/
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);
}
}
}
/**
* 获取透明度,从0到1,自动计算步长
*
* @param i
* @param j
* @return float 透明度
*/
private static float getAlpha(int i, int j, int verifySize)
{
int num = i + j;
float r = (float) 1 / verifySize, s = (verifySize + 1) * r;
return num > verifySize ? (num * r - s) : num * r;
}
/**
* 生成指定验证码图像文件 - 本地测试生成图片查看效果
*
* @param w 验证码图片宽
* @param h 验证码图片高
* @param outputFile 文件流
* @param code 随机验证码
* @throws IOException
*/
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, "login"); //测试登录，噪点和干扰线为0.05f和20
// outputImage(w, h, fos, code, "coupons"); //测试领券，噪点和干扰线为范围随机值0.05f ~ 0.1f和20 ~ 155
// outputImage(w, h, fos, code, "3D"); //测试领券，噪点和干扰线为范围随机值0.05f ~ 0.1f和20 ~ 155
// outputImage(w, h, fos, code, "GIF"); //测试领券，噪点和干扰线为范围随机值0.05f ~ 0.1f和20 ~ 155
// outputImage(w, h, fos, code, "GIF3D"); //测试领券，噪点和干扰线为范围随机值0.05f ~ 0.1f和20 ~ 155
// outputImage(w, h, fos, code, "mix2"); //测试领券，噪点和干扰线为范围随机值0.05f ~ 0.1f和20 ~ 155
outputImage(w, h, fos, code, "mixGIF"); // 测试领券，噪点和干扰线为范围随机值0.05f ~ 0.1f和20 ~ 155
fos.close();
}
catch (IOException e)
{
throw e;
}
}
/**
* 本地测试类，可以生成样例验证码图片供观看效果
*
* @param args
* @throws IOException
*/
public static void main(String[] args) throws IOException
{
File dir = new File("E:/logtest/verifies8");
int w = 120, h = 48;
for (int i = 0; i < 150; i++)
{
String verifyCode = generateVerifyCode(4);
File file = new File(dir, verifyCode + ".gif");
outputImage(w, h, file, verifyCode);
}
}
}
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