java生成验证码工具类

java生成验证码工具类

java生成验证码工具类，供大家参考，具体内容如下

package com.demo.utils;

import java.awt.BasicStroke;

import java.awt.Color;

import java.awt.Font;

import java.awt.Graphics2D;

import java.awt.RenderingHints;

import java.awt.geom.QuadCurve2D;

import java.awt.image.BufferedImage;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.OutputStream;

import java.util.Random;

import javax.imageio.ImageIO;

/**

* 生成验证码

* @author dongyangyang

* @Date 2017/3/13 12:31

* @Version 1.0

*

*/

public class AuthCodeUtils {

private final static Random random = new Random();

// 随机字体样式

private final static int[] fontStyle = { Font.HANGING_BASELINE, Font.ITALIC, Font.LAYOUT_LEFT_TO_RIGHT, Font.LAYOUT_NO_LIMIT_CONTEXT, Font.LAYOUT_NO_START_CONTEXT,

Font.LAYOUT_RIGHT_TO_LEFT, Font.CENTER_BASELINE, Font.PLAIN, Font.ROMAN_BASELINE, Font.TRUETYPE_FONT, Font.TYPE1_FONT, Font.BOLD };

private final static String[] font = { "Ravie", "Forte", "Arial", "Courier" };

private final static int[] xarr = { 23, 24, 19, 20, 21 };

private final static int[] yarr = { 20, 21, 22, 23, 24, 25, 16, 17, 18 };

private final static int[] font_size = { 28, 29, 30, 21, 22, 23, 24, 27, 26, 25 };

/**

* 画随机码图

* @param out

* @param width

* @param height

* @throws IOException

*/

public static void draw(OutputStream out, String value) throws IOException {

int width = 100, height = 40;

BufferedImage bi = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);

Graphics2D g = (Graphics2D) bi.getGraphics();

g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);

g.setColor(randColor(240,http:// 255));

g.fillRect(0, 0, width, height);

g.drawRect(1, 1, width - 2, height - 2);

for (int i = 0; i < 10; i++) {

g.setColor(randColor(150, 250));

g.drawOval(random.nextInt(110), random.nextInt(24), 5 + random.nextInt(10), 5 + random.nextInt(10));

}

g.setFont(getFont());

g.setColor(randColor(xarr[(int) (Math.random() * 5)], 254));

for (int i = 0, len = value.length(); i < len; i++) {

String rand = String.valueOf(value.charAt(i));

int degree = random.nextInt(23);

if (i %http:// 2 == 0) {

degree = degree * (-1);

}

int x = xarr[(int) (Math.random() * 5)] * i, y = yarr[(int) (Math.random() * 8)];

g.rotate(Math.toRadians(degree), x, y);

g.setColor(randColor(48, 254));

g.drawString(rand, x + 8, y + 10);

g.rotate(-Math.toRadians(degree), x, y);

}

// 图片中间线

g.setColor(randColor(0, 200));

// width是线宽,float型

BasicStroke bs = new BasicStroke(2);

g.setStroke(bs);

// 画出曲线

QuadCurve2D.Double curve = new QuadCurve2D.Double(0d, random.nextInt(height - 8) + 4, width / 2, height / 2, width, random.nextInt(height - 8) + 4);

g.draw(curve);

// 销毁图像

g.dispose();

ImageIO.write(bi, "png", out);

}

private static Font getFont() {

return new Font(font[(int) (Math.random() * 4)], fontStyle[(int) (Math.random() * 12)], font_size[(int) (Math.random() * 10)]);

}

private static Color randColor(int fc, int bc) {// 给定范围获得随机颜色

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 char[] c = { 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'j', 'k', 'm', 'n', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', 'A', 'B', 'C', 'D', 'E', 'F',

'G', 'H', 'J', 'K', 'L', 'M', 'N', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', '1', '3', '5', '6', '7', '8', '9' };

public static String getRandom(int size) {

StringBuilder sb = new StringBuilder();

for (int i = 0; i < size; i++) {

sb.append(c[Math.abs(random.nextInt()) % c.length]);

}

return sb.toString();

}

public static void main(String[] args) throws IOException {

for (int i = 1; i < 10; i++) {

FileOutputStream out = new FileOutputStream("D:\\bb"+ i +".png");

draw(out, getRandom(4));

}

}

}

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