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+package com.zheng.common.util;
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+
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+import javax.imageio.ImageIO;
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+import java.awt.*;
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+import java.awt.image.BufferedImage;
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+import java.io.IOException;
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+import java.io.OutputStream;
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+import java.util.Random;
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+
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+/**
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+ * 验证码工具类
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+ * Created by ZhangShuzheng on 2017/6/28.
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+ */
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+public class CaptchaUtil {
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+ // 图片的宽度。
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+ private int width = 160;
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+ // 图片的高度。
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+ private int height = 40;
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+ // 验证码字符个数
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+ private int codeCount = 4;
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+ // 验证码干扰线数
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+ private int lineCount = 20;
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+ // 验证码
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+ private String code = null;
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+ // 验证码图片Buffer
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+ private BufferedImage buffImg = null;
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+ Random random = new Random();
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+
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+ public CaptchaUtil() {
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+ creatImage();
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+ }
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+
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+ public CaptchaUtil(int width, int height) {
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+ this.width = width;
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+ this.height = height;
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+ creatImage();
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+ }
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+
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+ public CaptchaUtil(int width, int height, int codeCount) {
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+ this.width = width;
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+ this.height = height;
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+ this.codeCount = codeCount;
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+ creatImage();
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+ }
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+
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+ public CaptchaUtil(int width, int height, int codeCount, int lineCount) {
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+ this.width = width;
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+ this.height = height;
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+ this.codeCount = codeCount;
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+ this.lineCount = lineCount;
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+ creatImage();
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+ }
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+
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+ // 生成图片
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+ private void creatImage() {
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+ int fontWidth = width / codeCount;// 字体的宽度
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+ int fontHeight = height - 5;// 字体的高度
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+ int codeY = height - 8;
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+
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+ // 图像buffer
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+ buffImg = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
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+ Graphics g = buffImg.getGraphics();
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+ //Graphics2D g = buffImg.createGraphics();
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+ // 设置背景色
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+ g.setColor(getRandColor(200, 250));
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+ g.fillRect(0, 0, width, height);
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+
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+
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+ // 设置字体
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+ //Font font1 = getFont(fontHeight);
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+ Font font = new Font("Fixedsys", Font.BOLD, fontHeight);
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+ g.setFont(font);
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+
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+ // 设置干扰线
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+ for (int i = 0; i < lineCount; i++) {
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+ int xs = random.nextInt(width);
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+ int ys = random.nextInt(height);
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+ int xe = xs + random.nextInt(width);
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+ int ye = ys + random.nextInt(height);
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+ g.setColor(getRandColor(1, 255));
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+ g.drawLine(xs, ys, xe, ye);
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+ }
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+
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+ // 添加噪点
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+ float yawpRate = 0.01f;// 噪声率
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+ int area = (int) (yawpRate * width * height);
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+ for (int i = 0; i < area; i++) {
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+ int x = random.nextInt(width);
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+ int y = random.nextInt(height);
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+
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+ buffImg.setRGB(x, y, random.nextInt(255));
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+ }
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+
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+ String str1 = randomStr(codeCount);// 得到随机字符
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+ this.code = str1;
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+ for (int i = 0; i < codeCount; i++) {
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+ String strRand = str1.substring(i, i + 1);
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+ g.setColor(getRandColor(1, 255));
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+ // g.drawString(a,x,y);
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+ // 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
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+
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+ g.drawString(strRand, i * fontWidth + 3, codeY);
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+ }
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+ }
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+
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+ // 得到随机字符
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+ private String randomStr(int n) {
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+ String str1 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890";
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+ String str2 = "";
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+ int len = str1.length() - 1;
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+ double r;
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+ for (int i = 0; i < n; i++) {
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+ r = (Math.random()) * len;
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+ str2 = str2 + str1.charAt((int) r);
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+ }
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+ return str2;
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+ }
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+
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+ // 得到随机颜色
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+ private Color getRandColor(int fc, int bc) {// 给定范围获得随机颜色
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+ if (fc > 255)
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+ fc = 255;
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+ if (bc > 255)
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+ bc = 255;
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+ int r = fc + random.nextInt(bc - fc);
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+ int g = fc + random.nextInt(bc - fc);
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+ int b = fc + random.nextInt(bc - fc);
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+ return new Color(r, g, b);
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+ }
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+
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+ /**
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+ * 产生随机字体
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+ */
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+ private Font getFont(int size) {
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+ Random random = new Random();
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+ Font font[] = new Font[5];
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+ font[0] = new Font("Ravie", Font.PLAIN, size);
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+ font[1] = new Font("Antique Olive Compact", Font.PLAIN, size);
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+ font[2] = new Font("Fixedsys", Font.PLAIN, size);
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+ font[3] = new Font("Wide Latin", Font.PLAIN, size);
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+ font[4] = new Font("Gill Sans Ultra Bold", Font.PLAIN, size);
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+ return font[random.nextInt(5)];
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+ }
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+
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+ // 扭曲方法
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+ private void shear(Graphics g, int w1, int h1, Color color) {
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+ shearX(g, w1, h1, color);
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+ shearY(g, w1, h1, color);
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+ }
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+
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+ private void shearX(Graphics g, int w1, int h1, Color color) {
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+
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+ int period = random.nextInt(2);
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+
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+ boolean borderGap = true;
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+ int frames = 1;
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+ int phase = random.nextInt(2);
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+
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+ for (int i = 0; i < h1; i++) {
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+ double d = (double) (period >> 1)
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+ * Math.sin((double) i / (double) period
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+ + (6.2831853071795862D * (double) phase)
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+ / (double) frames);
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+ g.copyArea(0, i, w1, 1, (int) d, 0);
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+ if (borderGap) {
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+ g.setColor(color);
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+ g.drawLine((int) d, i, 0, i);
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+ g.drawLine((int) d + w1, i, w1, i);
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+ }
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+ }
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+ }
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+
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+ private void shearY(Graphics g, int w1, int h1, Color color) {
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+
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+ int period = random.nextInt(40) + 10; // 50;
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+
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+ boolean borderGap = true;
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+ int frames = 20;
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+ int phase = 7;
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+ for (int i = 0; i < w1; i++) {
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+ double d = (double) (period >> 1)
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+ * Math.sin((double) i / (double) period
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+ + (6.2831853071795862D * (double) phase)
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+ / (double) frames);
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+ g.copyArea(i, 0, 1, h1, 0, (int) d);
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+ if (borderGap) {
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+ g.setColor(color);
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+ g.drawLine(i, (int) d, i, 0);
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+ g.drawLine(i, (int) d + h1, i, h1);
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+ }
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+ }
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+ }
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+
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+ public void write(OutputStream sos) throws IOException {
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+ ImageIO.write(buffImg, "png", sos);
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+ sos.close();
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+ }
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+
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+ public BufferedImage getBuffImg() {
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+ return buffImg;
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+ }
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+
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+ public String getCode() {
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+ return code.toLowerCase();
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+ }
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+
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+// /**
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+// * 验证码
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+// * @param request
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+// * @param response
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+// * @param session
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+// * @throws IOException
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+// */
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+// @RequestMapping("/code.jpg")
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+// public void getCode3(HttpServletRequest request, HttpServletResponse response, HttpSession session) throws IOException {
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+// int width = NumberUtils.toInt(request.getParameter("width"), 100);
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+// int height = NumberUtils.toInt(request.getParameter("height"), 30);
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+// int codeCount = NumberUtils.toInt(request.getParameter("codeCount"), 4);
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+// int lineCount = NumberUtils.toInt(request.getParameter("lineCount"), 10);
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+// if (width > 1000) width = 100;
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+// if (height > 300) height = 30;
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+// if (codeCount > 10) codeCount = 4;
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+// if (lineCount > 100) lineCount = 10;
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+// // 设置响应的类型格式为图片格式
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+// response.setContentType("image/jpeg");
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+// // 禁止图像缓存。
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+// response.setHeader("Pragma", "no-cache");
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+// response.setHeader("Cache-Control", "no-cache");
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+// response.setDateHeader("Expires", 0);
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+// // 自定义参数
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+// CaptchaUtil code = new CaptchaUtil(width, height, codeCount, lineCount);
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+// String sessionId = session.getId();
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+// RedisUtil.set("captcha_" + sessionId, code.getCode(), 60 * 30);
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+// code.write(response.getOutputStream());
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+// }
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+
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+}
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ye shuqiu
