From ffacd8692db79347a1d1d8f6da43d02554ece315 Mon Sep 17 00:00:00 2001 From: luyao <839377654@qq.com> Date: Sun, 21 Aug 2022 22:56:10 +0800 Subject: [PATCH] 333 --- VerificationCode.java | 234 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 234 insertions(+) create mode 100644 VerificationCode.java diff --git a/VerificationCode.java b/VerificationCode.java new file mode 100644 index 0000000..7ee6481 --- /dev/null +++ b/VerificationCode.java @@ -0,0 +1,234 @@ +package com.zly.xsp.image; + +import java.awt.Color; +import java.awt.Font; +import java.awt.Graphics; +import java.awt.Graphics2D; +import java.awt.image.BufferedImage; +import java.io.IOException; +import java.io.OutputStream; +import java.util.Random; + +import javax.imageio.ImageIO; +import javax.servlet.http.HttpServletRequest; +import javax.servlet.http.HttpServletResponse; +import javax.servlet.http.HttpSession; + +public class CreateImageCode { + // 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 CreateImageCode() { + creatImage(); + } + + public CreateImageCode(int width, int height) { + this.width = width; + this.height = height; + creatImage(); + } + + public CreateImageCode(int width, int height, int codeCount) { + this.width = width; + this.height = height; + this.codeCount = codeCount; + creatImage(); + } + + public CreateImageCode(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(); + } + + //使用方法 + /*public void getCode3(HttpServletRequest req, HttpServletResponse response,HttpSession session) throws IOException{ + // 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); + + + CreateImageCode vCode = new CreateImageCode(100,30,5,10); + session.setAttribute("code", vCode.getCode()); + vCode.write(response.getOutputStream()); + }*/ + +} \ No newline at end of file