发布时间 : 2024/5/19 0:33:17 星期日 文章开源项目patchca生成验证码更新完毕开始阅读a73a721f964bcf84b9d57b7a

用之前要导入patchca jar包，可能会与tomcat的lib目录下的jar包发生冲突，一切准备好之后在使用下面的代码（导入jar包后，先发布其他的项目试试，没问题的发继续）

package com.ninemax.cul.servlet;

import java.awt.Color; import java.awt.Graphics;

import java.awt.image.BufferedImage; import java.awt.image.BufferedImageOp; import java.io.IOException; import java.io.OutputStream; import java.util.ArrayList; import java.util.List;

import java.util.Random;

import javax.imageio.ImageIO;

import javax.servlet.ServletException; import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession;

import org.patchca.background.BackgroundFactory; import org.patchca.color.ColorFactory;

import org.patchca.color.RandomColorFactory; import org.patchca.filter.ConfigurableFilterFactory; import org.patchca.filter.library.AbstractImageOp; import org.patchca.filter.library.WobbleImageOp; import org.patchca.font.RandomFontFactory; import org.patchca.service.Captcha;

import org.patchca.service.ConfigurableCaptchaService; import org.patchca.text.renderer.BestFitTextRenderer; import org.patchca.text.renderer.TextRenderer; import org.patchca.word.RandomWordFactory; /**

* 验证码生成类 *

* 使用开源验证码项目patchca生成 * 依赖jar包：patchca-0.5.0.jar

* 项目网址：https://code.google.com/p/patchca/ *

* @author zyh

* @version 1.00 2012-7-12 New */

public class ValidationCodeServlet extends HttpServlet { private static final long serialVersionUID = 5126616339795936447L; private ConfigurableCaptchaService configurableCaptchaService = null; private ColorFactory colorFactory = null; private RandomFontFactory fontFactory = null; private RandomWordFactory wordFactory = null; private TextRenderer textRenderer = null; public ValidationCodeServlet() { super(); } /**

* Servlet销毁方法,负责销毁所使用资源.
*/

public void destroy() { wordFactory = null; colorFactory = null; fontFactory = null; textRenderer = null; configurableCaptchaService = null; super.destroy(); // Just puts \}

public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doPost(request, response); }

public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType(\ response.setHeader(\ HttpSession session = request.getSession(true); OutputStream outputStream = response.getOutputStream(); // 得到验证码对象,有验证码图片和验证码字符串 Captcha captcha = configurableCaptchaService.getCaptcha(); // 取得验证码字符串放入Session String validationCode = captcha.getChallenge();

session.setAttribute(\ // 取得验证码图片并输出

BufferedImage bufferedImage = captcha.getImage(); ImageIO.write(bufferedImage, \

outputStream.flush(); outputStream.close();

} /**

* Servlet初始化方法 */

public void init() throws ServletException { configurableCaptchaService = new ConfigurableCaptchaService(); // 颜色创建工厂,使用一定范围内的随机色 colorFactory = new RandomColorFactory(); configurableCaptchaService.setColorFactory(colorFactory); // 随机字体生成器 fontFactory = new RandomFontFactory(); fontFactory.setMaxSize(32); fontFactory.setMinSize(28); configurableCaptchaService.setFontFactory(fontFactory); // 随机字符生成器,去除掉容易混淆的字母和数字,如o和0等 wordFactory = new RandomWordFactory();

wordFactory.setCharacters(\ wordFactory.setMaxLength(5); wordFactory.setMinLength(4);

configurableCaptchaService.setWordFactory(wordFactory);

// 自定义验证码图片背景 MyCustomBackgroundFactory backgroundFactory = MyCustomBackgroundFactory(); configurableCaptchaService.setBackgroundFactory(backgroundFactory); // 图片滤镜设置 ConfigurableFilterFactory filterFactory = new ConfigurableFilterFactory(); List filters = new ArrayList(); WobbleImageOp wobbleImageOp = new WobbleImageOp(); wobbleImageOp.setEdgeMode(AbstractImageOp.EDGE_MIRROR); wobbleImageOp.setxAmplitude(2.0);

new

wobbleImageOp.setyAmplitude(1.0); filters.add(wobbleImageOp); filterFactory.setFilters(filters);

configurableCaptchaService.setFilterFactory(filterFactory);

// 文字渲染器设置

textRenderer = new BestFitTextRenderer(); textRenderer.setBottomMargin(3); textRenderer.setTopMargin(3);

configurableCaptchaService.setTextRenderer(textRenderer);

// 验证码图片的大小 configurableCaptchaService.setWidth(82); configurableCaptchaService.setHeight(32); } /**

* 自定义验证码图片背景,主要画一些噪点和干扰线 */

private class MyCustomBackgroundFactory implements BackgroundFactory { private Random random = new Random();

public void fillBackground(BufferedImage image) { Graphics graphics = image.getGraphics(); // 验证码图片的宽高 int imgWidth = image.getWidth(); int imgHeight = image.getHeight();

// 填充为白色背景

graphics.setColor(Color.WHITE);

graphics.fillRect(0, 0, imgWidth, imgHeight);

// 画100个噪点(颜色及位置随机) for(int i = 0; i < 100; i++) { // 随机颜色 int rInt = random.nextInt(255); int gInt = random.nextInt(255); int bInt = random.nextInt(255); graphics.setColor(new Color(rInt, gInt, bInt)); // 随机位置