验证码生成工具类
This commit is contained in:
shuzheng
parent
7a117b3fa9
commit
5e0311a602
|
|
@ -0,0 +1,237 @@
|
|||
package com.zheng.common.util;
|
||||
|
||||
import javax.imageio.ImageIO;
|
||||
import java.awt.*;
|
||||
import java.awt.image.BufferedImage;
|
||||
import java.io.IOException;
|
||||
import java.io.OutputStream;
|
||||
import java.util.Random;
|
||||
|
||||
/**
|
||||
* 验证码工具类
|
||||
* Created by ZhangShuzheng on 2017/6/28.
|
||||
*/
|
||||
public class CaptchaUtil {
|
||||
// 图片的宽度。
|
||||
private int width = 160;
|
||||
// 图片的高度。
|
||||
private int height = 40;
|
||||
// 验证码字符个数
|
||||
private int codeCount = 4;
|
||||
// 验证码干扰线数
|
||||
private int lineCount = 20;
|
||||
// 验证码
|
||||
private String code = null;
|
||||
// 验证码图片Buffer
|
||||
private BufferedImage buffImg = null;
|
||||
Random random = new Random();
|
||||
|
||||
public CaptchaUtil() {
|
||||
creatImage();
|
||||
}
|
||||
|
||||
public CaptchaUtil(int width, int height) {
|
||||
this.width = width;
|
||||
this.height = height;
|
||||
creatImage();
|
||||
}
|
||||
|
||||
public CaptchaUtil(int width, int height, int codeCount) {
|
||||
this.width = width;
|
||||
this.height = height;
|
||||
this.codeCount = codeCount;
|
||||
creatImage();
|
||||
}
|
||||
|
||||
public CaptchaUtil(int width, int height, int codeCount, int lineCount) {
|
||||
this.width = width;
|
||||
this.height = height;
|
||||
this.codeCount = codeCount;
|
||||
this.lineCount = lineCount;
|
||||
creatImage();
|
||||
}
|
||||
|
||||
// 生成图片
|
||||
private void creatImage() {
|
||||
int fontWidth = width / codeCount;// 字体的宽度
|
||||
int fontHeight = height - 5;// 字体的高度
|
||||
int codeY = height - 8;
|
||||
|
||||
// 图像buffer
|
||||
buffImg = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
|
||||
Graphics g = buffImg.getGraphics();
|
||||
//Graphics2D g = buffImg.createGraphics();
|
||||
// 设置背景色
|
||||
g.setColor(getRandColor(200, 250));
|
||||
g.fillRect(0, 0, width, height);
|
||||
|
||||
|
||||
// 设置字体
|
||||
//Font font1 = getFont(fontHeight);
|
||||
Font font = new Font("Fixedsys", Font.BOLD, fontHeight);
|
||||
g.setFont(font);
|
||||
|
||||
// 设置干扰线
|
||||
for (int i = 0; i < lineCount; i++) {
|
||||
int xs = random.nextInt(width);
|
||||
int ys = random.nextInt(height);
|
||||
int xe = xs + random.nextInt(width);
|
||||
int ye = ys + random.nextInt(height);
|
||||
g.setColor(getRandColor(1, 255));
|
||||
g.drawLine(xs, ys, xe, ye);
|
||||
}
|
||||
|
||||
// 添加噪点
|
||||
float yawpRate = 0.01f;// 噪声率
|
||||
int area = (int) (yawpRate * width * height);
|
||||
for (int i = 0; i < area; i++) {
|
||||
int x = random.nextInt(width);
|
||||
int y = random.nextInt(height);
|
||||
|
||||
buffImg.setRGB(x, y, random.nextInt(255));
|
||||
}
|
||||
|
||||
String str1 = randomStr(codeCount);// 得到随机字符
|
||||
this.code = str1;
|
||||
for (int i = 0; i < codeCount; i++) {
|
||||
String strRand = str1.substring(i, i + 1);
|
||||
g.setColor(getRandColor(1, 255));
|
||||
// g.drawString(a,x,y);
|
||||
// a为要画出来的东西，x和y表示要画的东西最左侧字符的基线位于此图形上下文坐标系的 (x, y) 位置处
|
||||
|
||||
g.drawString(strRand, i * fontWidth + 3, codeY);
|
||||
}
|
||||
}
|
||||
|
||||
// 得到随机字符
|
||||
private String randomStr(int n) {
|
||||
String str1 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890";
|
||||
String str2 = "";
|
||||
int len = str1.length() - 1;
|
||||
double r;
|
||||
for (int i = 0; i < n; i++) {
|
||||
r = (Math.random()) * len;
|
||||
str2 = str2 + str1.charAt((int) r);
|
||||
}
|
||||
return str2;
|
||||
}
|
||||
|
||||
// 得到随机颜色
|
||||
private Color getRandColor(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);
|
||||
}
|
||||
|
||||
/**
|
||||
* 产生随机字体
|
||||
*/
|
||||
private Font getFont(int size) {
|
||||
Random random = new Random();
|
||||
Font font[] = new Font[5];
|
||||
font[0] = new Font("Ravie", Font.PLAIN, size);
|
||||
font[1] = new Font("Antique Olive Compact", Font.PLAIN, size);
|
||||
font[2] = new Font("Fixedsys", Font.PLAIN, size);
|
||||
font[3] = new Font("Wide Latin", Font.PLAIN, size);
|
||||
font[4] = new Font("Gill Sans Ultra Bold", Font.PLAIN, size);
|
||||
return font[random.nextInt(5)];
|
||||
}
|
||||
|
||||
// 扭曲方法
|
||||
private void shear(Graphics g, int w1, int h1, Color color) {
|
||||
shearX(g, w1, h1, color);
|
||||
shearY(g, w1, h1, color);
|
||||
}
|
||||
|
||||
private 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 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);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
public void write(OutputStream sos) throws IOException {
|
||||
ImageIO.write(buffImg, "png", sos);
|
||||
sos.close();
|
||||
}
|
||||
|
||||
public BufferedImage getBuffImg() {
|
||||
return buffImg;
|
||||
}
|
||||
|
||||
public String getCode() {
|
||||
return code.toLowerCase();
|
||||
}
|
||||
|
||||
// /**
|
||||
// * 验证码
|
||||
// * @param request
|
||||
// * @param response
|
||||
// * @param session
|
||||
// * @throws IOException
|
||||
// */
|
||||
// @RequestMapping("/code.jpg")
|
||||
// public void getCode3(HttpServletRequest request, HttpServletResponse response, HttpSession session) throws IOException {
|
||||
// int width = NumberUtils.toInt(request.getParameter("width"), 100);
|
||||
// int height = NumberUtils.toInt(request.getParameter("height"), 30);
|
||||
// int codeCount = NumberUtils.toInt(request.getParameter("codeCount"), 4);
|
||||
// int lineCount = NumberUtils.toInt(request.getParameter("lineCount"), 10);
|
||||
// if (width > 1000) width = 100;
|
||||
// if (height > 300) height = 30;
|
||||
// if (codeCount > 10) codeCount = 4;
|
||||
// if (lineCount > 100) lineCount = 10;
|
||||
// // 设置响应的类型格式为图片格式
|
||||
// response.setContentType("image/jpeg");
|
||||
// // 禁止图像缓存。
|
||||
// response.setHeader("Pragma", "no-cache");
|
||||
// response.setHeader("Cache-Control", "no-cache");
|
||||
// response.setDateHeader("Expires", 0);
|
||||
// // 自定义参数
|
||||
// CaptchaUtil code = new CaptchaUtil(width, height, codeCount, lineCount);
|
||||
// String sessionId = session.getId();
|
||||
// RedisUtil.set("captcha_" + sessionId, code.getCode(), 60 * 30);
|
||||
// code.write(response.getOutputStream());
|
||||
// }
|
||||
|
||||
}
|
||||
Loading…
Reference in New Issue