原文->http://wwwzhouhui.iteye.com/blog/410935
现在项目中用SPRING 比较多所以整合了一下。其中的部分代码是参考一个jeecms项目的,讲其中的jcaptcha验证码这块剥离出来。
项目在上篇基础上编写的,部分代码是上篇中的代码(偷懒了)
1.用到得JAR
commons-logging.jar,jcaptcha-all-1.0-RC6.jar,spring-beans-2.5.6.jar
spring-context-2.5.6.jar,spring-core-2.5.6.jar,spring-web-2.5.6.jar
2.applicationContext.xml
- <?xml version="1.0" encoding="UTF-8"?>
- <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
- xmlns:jee="http://www.springframework.org/schema/jee" xmlns:tx="http://www.springframework.org/schema/tx"
- xmlns:context="http://www.springframework.org/schema/context"
- xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-2.5.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd"
- >
- <!--验证码生成器-->
- <bean id="imageCaptchaService" class="com.spring.CaptchaService">
- <constructor-arg type="com.octo.captcha.service.captchastore.CaptchaStore" index="0">
- <ref bean="fastHashMapCaptchaStore"/>
- </constructor-arg>
- <!--which captcha Engine you use-->
- <constructor-arg type="com.octo.captcha.engine.CaptchaEngine" index="1">
- <ref bean="captchaEngineEx"/>
- </constructor-arg>
- <constructor-arg index="2">
- <value>180</value>
- </constructor-arg>
- <constructor-arg index="3">
- <value>100000</value>
- </constructor-arg>
- <constructor-arg index="4">
- <value>75000</value>
- </constructor-arg>
- </bean>
- <bean id="fastHashMapCaptchaStore" class="com.octo.captcha.service.captchastore.FastHashMapCaptchaStore"/>
- <!--you can define more than one captcha engine here -->
- <bean id="captchaEngineEx" class="com.spring.CaptchaEngineEx"/>
- </beans>
3. web.xml
- <?xml version="1.0" encoding="UTF-8"?>
- <web-app version="2.4"
- xmlns="http://java.sun.com/xml/ns/j2ee"
- xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
- xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
- http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
- <context-param>
- <param-name>contextConfigLocation</param-name>
- <param-value>
- classpath:applicationContext.xml
- </param-value>
- </context-param>
- <listener>
- <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
- </listener>
- <!--
- <servlet>
- <servlet-name>jcaptcha</servlet-name>
- <servlet-class>com.code.ImageCaptchaServlet</servlet-class>
- <load-on-startup>0</load-on-startup>
- </servlet>
- <servlet-mapping>
- <servlet-name>jcaptcha</servlet-name>
- <url-pattern>/jcaptcha</url-pattern>
- </servlet-mapping>
- -->
- <servlet>
- <servlet-name>jcaptcha2</servlet-name>
- <servlet-class>com.spring.ImageCaptchaServlet</servlet-class>
- <load-on-startup>0</load-on-startup>
- </servlet>
- <servlet-mapping>
- <servlet-name>jcaptcha2</servlet-name>
- <url-pattern>/jcaptcha</url-pattern>
- </servlet-mapping>
- <!--
- <servlet>
- <servlet-name>checkjcaptcha</servlet-name>
- <servlet-class>com.code.ValidationServlet</servlet-class>
- <load-on-startup>1</load-on-startup>
- </servlet>
- <servlet-mapping>
- <servlet-name>checkjcaptcha</servlet-name>
- <url-pattern>/validateAction</url-pattern>
- </servlet-mapping>
- -->
- <servlet>
- <servlet-name>checkjcaptcha2</servlet-name>
- <servlet-class>com.spring.ValidationServlet</servlet-class>
- <load-on-startup>1</load-on-startup>
- </servlet>
- <servlet-mapping>
- <servlet-name>checkjcaptcha2</servlet-name>
- <url-pattern>/validateAction</url-pattern>
- </servlet-mapping>
- <welcome-file-list>
- <welcome-file>index.jsp</welcome-file>
- </welcome-file-list>
- </web-app>
4.java 代码
自定义生成代码部分
CaptchaEngineEx.java
- package com.spring;
- import java.awt.Color;
- import com.octo.captcha.component.image.backgroundgenerator.BackgroundGenerator;
- import com.octo.captcha.component.image.backgroundgenerator.GradientBackgroundGenerator;
- import com.octo.captcha.component.image.color.SingleColorGenerator;
- import com.octo.captcha.component.image.fontgenerator.FontGenerator;
- import com.octo.captcha.component.image.fontgenerator.RandomFontGenerator;
- import com.octo.captcha.component.image.textpaster.DecoratedRandomTextPaster;
- import com.octo.captcha.component.image.textpaster.TextPaster;
- import com.octo.captcha.component.image.textpaster.textdecorator.BaffleTextDecorator;
- import com.octo.captcha.component.image.textpaster.textdecorator.LineTextDecorator;
- import com.octo.captcha.component.image.textpaster.textdecorator.TextDecorator;
- import com.octo.captcha.component.image.wordtoimage.ComposedWordToImage;
- import com.octo.captcha.component.image.wordtoimage.WordToImage;
- import com.octo.captcha.component.word.wordgenerator.RandomWordGenerator;
- import com.octo.captcha.component.word.wordgenerator.WordGenerator;
- import com.octo.captcha.engine.image.ListImageCaptchaEngine;
- import com.octo.captcha.image.gimpy.GimpyFactory;
- /***********************************************************************
- *
- * CaptchaEngineEx.java
- * @copyright Copyright: 2009-2012
- * @creator 周辉<br/>
- * @create-time Jun 18, 2009 2:41:12 PM
- * @revision $Id: *
- ***********************************************************************/
- public class CaptchaEngineEx extends ListImageCaptchaEngine {
- protected void buildInitialFactories() {
- // Set Captcha Word Length Limitation which should not over 6
- Integer minAcceptedWordLength = new Integer(4);
- Integer maxAcceptedWordLength = new Integer(5);
- // Set up Captcha Image Size: Height and Width
- Integer imageHeight = new Integer(40);
- Integer imageWidth = new Integer(100);
- // Set Captcha Font Size
- Integer minFontSize = new Integer(20);
- Integer maxFontSize = new Integer(22);
- // We just generate digit for captcha source char Although you can use
- // abcdefghijklmnopqrstuvwxyz
- WordGenerator wordGenerator = new RandomWordGenerator("0123456789");
- // cyt and unruledboy proved that backgroup not a factor of Security. A
- // captcha attacker won't affaid colorful backgroud, so we just use
- // white
- // color, like google and hotmail.
- BackgroundGenerator backgroundGenerator = new GradientBackgroundGenerator(
- imageWidth, imageHeight, Color.white, Color.white);
- // font is not helpful for security but it really increase difficultness
- // for
- // attacker
- FontGenerator fontGenerator = new RandomFontGenerator(minFontSize,
- maxFontSize);
- // Note that our captcha color is Blue
- SingleColorGenerator scg = new SingleColorGenerator(Color.blue);
- // decorator is very useful pretend captcha attack. we use two line text
- // decorators.
- LineTextDecorator lineDecorator = new LineTextDecorator(1, Color.blue);
- // LineTextDecorator line_decorator2 = new LineTextDecorator(1,
- // Color.blue);
- TextDecorator[] textdecorators = new TextDecorator[1];
- textdecorators[0] = lineDecorator;
- // textdecorators[1] = line_decorator2;
- TextPaster textPaster = new DecoratedRandomTextPaster(
- minAcceptedWordLength, maxAcceptedWordLength, scg,
- new TextDecorator[] { new BaffleTextDecorator(new Integer(1),
- Color.white) });
- // ok, generate the WordToImage Object for logon service to use.
- WordToImage wordToImage = new ComposedWordToImage(fontGenerator,
- backgroundGenerator, textPaster);
- addFactory(new GimpyFactory(wordGenerator, wordToImage));
- }
- }
生成图片的servlet
ImageCaptchaServlet.JAVA
- package com.spring;
- import java.awt.image.BufferedImage;
- import java.io.ByteArrayOutputStream;
- import java.io.IOException;
- import javax.servlet.ServletConfig;
- import javax.servlet.ServletException;
- import javax.servlet.ServletOutputStream;
- import javax.servlet.http.HttpServlet;
- import javax.servlet.http.HttpServletRequest;
- import javax.servlet.http.HttpServletResponse;
- import org.springframework.web.context.WebApplicationContext;
- import org.springframework.web.context.support.WebApplicationContextUtils;
- import com.octo.captcha.service.CaptchaServiceException;
- import com.octo.captcha.service.image.ImageCaptchaService;
- import com.sun.image.codec.jpeg.JPEGCodec;
- import com.sun.image.codec.jpeg.JPEGImageEncoder;
- /***********************************************************************
- *
- * ImageCaptchaServlet.java
- * @copyright Copyright: 2009-2012
- * @creator 周辉<br/>
- * @create-time Jun 18, 2009 2:44:15 PM
- * @revision $Id: *
- ***********************************************************************/
- @SuppressWarnings("serial")
- public class ImageCaptchaServlet extends HttpServlet {
- private ImageCaptchaService imageCaptchaService;
- private String beanName = "imageCaptchaService";
- public void init(ServletConfig servletConfig) throws ServletException {
- super.init(servletConfig);
- WebApplicationContext wac = WebApplicationContextUtils
- .getRequiredWebApplicationContext(servletConfig
- .getServletContext());
- imageCaptchaService = (ImageCaptchaService) wac.getBean(beanName,
- ImageCaptchaService.class);
- }
- protected void doGet(HttpServletRequest httpServletRequest,
- HttpServletResponse httpServletResponse) throws ServletException,
- IOException {
- byte[] captchaChallengeAsJpeg = null;
- // the output stream to render the captcha image as jpeg into
- ByteArrayOutputStream jpegOutputStream = new ByteArrayOutputStream();
- try {
- // get the session id that will identify the generated captcha.
- // the same id must be used to validate the response, the session id
- // is a good candidate!
- String captchaId = httpServletRequest.getSession().getId();
- // call the ImageCaptchaService getChallenge method
- BufferedImage challenge = imageCaptchaService
- .getImageChallengeForID(captchaId, httpServletRequest
- .getLocale());
- // a jpeg encoder
- JPEGImageEncoder jpegEncoder = JPEGCodec
- .createJPEGEncoder(jpegOutputStream);
- jpegEncoder.encode(challenge);
- } catch (IllegalArgumentException e) {
- httpServletResponse.sendError(HttpServletResponse.SC_NOT_FOUND);
- return;
- } catch (CaptchaServiceException e) {
- httpServletResponse
- .sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
- return;
- }
- captchaChallengeAsJpeg = jpegOutputStream.toByteArray();
- // flush it in the response
- httpServletResponse.setHeader("Cache-Control", "no-store");
- httpServletResponse.setHeader("Pragma", "no-cache");
- httpServletResponse.setDateHeader("Expires", 0);
- httpServletResponse.setContentType("image/jpeg");
- ServletOutputStream responseOutputStream = httpServletResponse
- .getOutputStream();
- responseOutputStream.write(captchaChallengeAsJpeg);
- responseOutputStream.flush();
- responseOutputStream.close();
- }
- }
验证的单列类 CaptchaService.java
- package com.spring;
- import com.octo.captcha.engine.CaptchaEngine;
- import com.octo.captcha.service.captchastore.CaptchaStore;
- import com.octo.captcha.service.image.DefaultManageableImageCaptchaService;
- /***********************************************************************
- *
- * CaptchaService.java
- * @copyright Copyright: 2009-2012
- * @creator 周辉<br/>
- * @create-time Jun 18, 2009 2:42:53 PM
- * @revision $Id: *
- ***********************************************************************/
- public class CaptchaService extends DefaultManageableImageCaptchaService {
- public CaptchaService() {
- super();
- }
- public CaptchaService(int minSeconds, int maxStoreSize, int loadBefore) {
- super(minSeconds, maxStoreSize, loadBefore);
- }
- public CaptchaService(CaptchaStore captchaStore,
- CaptchaEngine captchaEngine, int minSeconds, int maxStoreSize,
- int loadBefore) {
- super(captchaStore, captchaEngine, minSeconds, maxStoreSize, loadBefore);
- }
- public Boolean validateResponseForID(String ID, Object response) {
- Boolean isHuman;
- try {
- isHuman = super.validateResponseForID(ID, response);
- } catch (Exception e) {
- isHuman = false;
- }
- return isHuman;
- }
- }
最后测试验证的类
ValidationServlet.java
- package com.spring;
- import java.io.IOException;
- import javax.servlet.ServletConfig;
- import javax.servlet.ServletException;
- import javax.servlet.http.HttpServlet;
- import javax.servlet.http.HttpServletRequest;
- import javax.servlet.http.HttpServletResponse;
- import org.springframework.web.context.WebApplicationContext;
- import org.springframework.web.context.support.WebApplicationContextUtils;
- import com.octo.captcha.service.CaptchaServiceException;
- import com.octo.captcha.service.image.ImageCaptchaService;
- /***********************************************************************
- *
- * ValidationServlet.java
- * @copyright Copyright: 2009-2012
- * @creator 周辉<br/>
- * @create-time Jun 18, 2009 3:16:50 PM
- * @revision $Id: *
- ***********************************************************************/
- public class ValidationServlet extends HttpServlet {
- private ImageCaptchaService imageCaptchaService;
- private String beanName = "imageCaptchaService";
- public void init(ServletConfig servletConfig) throws ServletException {
- super.init(servletConfig);
- WebApplicationContext wac = WebApplicationContextUtils
- .getRequiredWebApplicationContext(servletConfig
- .getServletContext());
- imageCaptchaService = (ImageCaptchaService) wac.getBean(beanName,
- ImageCaptchaService.class);
- }
- protected void doGet(HttpServletRequest httpServletRequest,
- HttpServletResponse httpServletResponse) throws ServletException,
- IOException {
- Boolean isResponseCorrect = Boolean.FALSE;
- //remenber that we need an id to validate!
- String captchaId = httpServletRequest.getSession().getId();
- //retrieve the response
- String response = httpServletRequest.getParameter("j_captcha_response");
- // Call the Service method
- try {
- isResponseCorrect=imageCaptchaService.validateResponseForID(captchaId, response);
- } catch (CaptchaServiceException e) {
- //should not happen, may be thrown if the id is not valid
- }
- System.out.println(isResponseCorrect);
- // httpServletResponse.encodeUrl("sucess.html");
- if(isResponseCorrect.booleanValue()){
- httpServletResponse.sendRedirect("success.html");
- }
- else {
- httpServletResponse.sendRedirect("failture.html");
- }
- }
- }
5 页面HTML
login2.html
- <html>
- <head>
- <title>MyHtml.html</title>
- <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
- <meta http-equiv="description" content="this is my page">
- <meta http-equiv="content-type" content="text/html; charset=UTF-8">
- <!--<link rel="stylesheet" type="text/css" href="./styles.css">-->
- </head>
- <body>
- <form name="f1" id="f1" action="/jcaptcha/validateAction" method="get">
- <table border="0">
- <tr>
- <td>验证码:</td>
- <td><img src="jcaptcha"><input type='text' name='j_captcha_response' value=''></td>
- </tr>
- <tr>
- <td colspan="2" align="center"><input type="submit"></td>
- </tr>
- </table>
- </form>
- </body>
- </html>
6 最后调用成功失败的页面success.html failture.html(略)
最后发布程序,启动TOMCAT 输入
http://localhost:8081/jcaptcha/login2.html
看到生成验证码了
相关推荐
使用最简方式使用了JCaptcha开源组件,非常适合学习
这是一个基于acegi的jcaptcha的验证码例子,希望对正在学习的大家有所帮助
这是一个基于acegi的jcaptcha的验证码例子,希望对正在学习的大家有所帮助
【资源说明】 1、该资源包括项目的全部源码,下载可以直接使用! 2、本项目适合作为计算机、数学、电子信息等专业的课程设计...基于SSM实现的注册登录系统源码+项目说明(验证码使用jcaptcha,发送邮件使用JEmail).zip
【资源说明】 1、该资源包括项目的全部源码,下载可以直接使用! 2、本项目适合作为计算机、数学、电子信息等专业的课程设计...基于SSM创建的注册登录系统源码+项目说明(验证码使用jcaptcha,发送邮件使用JEmail).zip
免责声明:资料部分来源于合法的互联网渠道收集和整理,部分自己学习积累成果,供大家学习参考与交流。收取的费用仅用于收集和整理资料耗费时间的酬劳。 本人尊重原创作者或出版方,资料版权归原作者或出版方所有,...
免责声明:资料部分来源于合法的互联网渠道收集和整理,部分自己学习积累成果,供大家学习参考与交流。收取的费用仅用于收集和整理资料耗费时间的酬劳。 本人尊重原创作者或出版方,资料版权归原作者或出版方所有,...
资源项目的难度比较适中,内容都是经过助教老师审定过的,应该能够满足学习、使用需求,如果有需要的话可以放心下载使用。有任何问题也可以随时私信博主,博主会第一时间给您解答!!! 本资源中的源码都是经过本地...
【资源说明】 1、该资源内项目代码都是经过测试运行成功,功能正常的情况下才上传的,请...3、不仅适合小白学习实战练习,也可作为大作业、课程设计、毕设项目、初期项目立项演示等,欢迎下载,互相学习,共同进步!
关于验证码的一个小demo,仅供学习这块的人参考。很简单!
验证码使用jcaptcha,发送邮件使用JEmail 毕业设计是高等教育阶段学生在完成学业前所进行的一项重要学术任务,旨在检验学生通过学习所获得的知识、技能以及对特定领域的深刻理解能力。这项任务通常要求学生运用所学...
Java数据压缩与传输实例,可以学习一下实例化套按字、得到文件输入流、压缩输入流、文件输出流、实例化缓冲区、写入数据到文件、关闭输入流、关闭套接字关闭输出流、输出错误信息等Java编程小技巧。 Java数组倒置...
笔者当初为了学习JAVA,收集了很多经典源码,源码难易程度分为初级、中级、高级等,详情看源码列表,需要的可以直接下载! 这些源码反映了那时那景笔者对未来的盲目,对代码的热情、执着,对IT的憧憬、向往!此时此...