228 lines
6.9 KiB
Java
228 lines
6.9 KiB
Java
package com.ruoyi.common.utils;
|
||
|
||
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.IOException;
|
||
import java.io.OutputStream;
|
||
import java.security.SecureRandom;
|
||
import java.util.Arrays;
|
||
import java.util.Random;
|
||
import javax.imageio.ImageIO;
|
||
|
||
/**
|
||
* 验证码工具类
|
||
*
|
||
* @author ruoyi
|
||
*/
|
||
public class VerifyCodeUtils
|
||
{
|
||
// 使用到Algerian字体，系统里没有的话需要安装字体，字体只显示大写，去掉了1,0,i,o几个容易混淆的字符
|
||
public static final String VERIFY_CODES = "123456789ABCDEFGHJKLMNPQRSTUVWXYZ";
|
||
|
||
private static Random random = new SecureRandom();
|
||
|
||
/**
|
||
* 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
|
||
*/
|
||
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();
|
||
}
|
||
|
||
/**
|
||
* 输出指定验证码图片流
|
||
*
|
||
* @param w
|
||
* @param h
|
||
* @param os
|
||
* @param code
|
||
* @throws IOException
|
||
*/
|
||
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);// 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);
|
||
|
||
// 绘制干扰线
|
||
Random random = new Random();
|
||
g2.setColor(getRandColor(160, 200));// 设置线条的颜色
|
||
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);
|
||
}
|
||
|
||
// 添加噪点
|
||
float yawpRate = 0.05f;// 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);
|
||
}
|
||
|
||
shear(g2, w, h, c);// 使图片扭曲
|
||
|
||
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);
|
||
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; // 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);
|
||
}
|
||
|
||
}
|
||
}
|
||
} |