验证码生成无敌版
Posted Ashan-Da宝旗
tags:
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1.创建一个servlet
package cn.itcast.common;
import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import javax.annotation.Resource;
import javax.imageio.ImageIO;
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.beans.factory.BeanFactoryUtils;
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 cn.itcast.common.web.SessionProvider;
/**
* 提供验证码图片的Servlet
*/
@SuppressWarnings("serial")
public class JcaptchaServlet extends HttpServlet
public static final String CAPTCHA_IMAGE_FORMAT = "jpeg";
private ImageCaptchaService captchaService;
private SessionProvider session;
@Override
public void init() throws ServletException
WebApplicationContext appCtx = WebApplicationContextUtils
.getWebApplicationContext(getServletContext());
captchaService = (ImageCaptchaService) BeanFactoryUtils
.beanOfTypeIncludingAncestors(appCtx, ImageCaptchaService.class);
session = (SessionProvider) BeanFactoryUtils
.beanOfTypeIncludingAncestors(appCtx, SessionProvider.class);
@Override
protected void doGet(HttpServletRequest request,
HttpServletResponse response) 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 = session.getSessionId(request);
BufferedImage challenge = captchaService.getImageChallengeForID(
captchaId, request.getLocale());
// Jimi.putImage("image/jpeg", challenge, jpegOutputStream);
ImageIO.write(challenge, CAPTCHA_IMAGE_FORMAT, jpegOutputStream);
catch (IllegalArgumentException e)
response.sendError(HttpServletResponse.SC_NOT_FOUND);
return;
catch (CaptchaServiceException e)
response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
return;
// catch (JimiException e)
// response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
// return;
//
captchaChallengeAsJpeg = jpegOutputStream.toByteArray();
// flush it in the response
response.setHeader("Cache-Control", "no-store");
response.setHeader("Pragma", "no-cache");
response.setDateHeader("Expires", 0);
response.setContentType("image/" + CAPTCHA_IMAGE_FORMAT);
ServletOutputStream responseOutputStream = response.getOutputStream();
responseOutputStream.write(captchaChallengeAsJpeg);
responseOutputStream.flush();
responseOutputStream.close();
2.创建一个一个xml文件
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd"
default-lazy-init="true">
<bean id="captchaService" class="com.octo.captcha.service.multitype.GenericManageableCaptchaService">
<constructor-arg index="0" ref="imageEngine"/>
<constructor-arg type="int" index="1" value="180"/>
<constructor-arg type="int" index="2" value="100000"/>
<constructor-arg type="int" index="3" value="75000"/>
</bean>
<bean id="imageEngine" class="com.octo.captcha.engine.GenericCaptchaEngine">
<constructor-arg index="0">
<list>
<ref bean="captchaFactory"/>
</list>
</constructor-arg>
</bean>
<bean id="captchaFactory" class="com.octo.captcha.image.gimpy.GimpyFactory">
<constructor-arg>
<ref bean="wordgen"/>
</constructor-arg>
<constructor-arg>
<ref bean="wordtoimage"/>
</constructor-arg>
</bean>
<bean id="wordgen" class= "com.octo.captcha.component.word.wordgenerator.RandomWordGenerator">
<!--可选字符-->
<constructor-arg>
<value>aabbccddeefgghhkkmnnooppqqsstuuvvwxxyyzz</value>
</constructor-arg>
</bean>
<bean id="wordtoimage" class="com.octo.captcha.component.image.wordtoimage.ComposedWordToImage">
<constructor-arg index="0">
<ref bean="fontGenRandom"/>
</constructor-arg>
<constructor-arg index="1">
<ref bean="backGenUni"/>
</constructor-arg>
<constructor-arg index="2">
<ref bean="decoratedPaster"/>
</constructor-arg>
</bean>
<bean id="fontGenRandom" class="com.octo.captcha.component.image.fontgenerator.RandomFontGenerator">
<!--最小字体-->
<constructor-arg index="0">
<value>26</value>
</constructor-arg>
<!--最大字体-->
<constructor-arg index="1">
<value>34</value>
</constructor-arg>
<constructor-arg index="2">
<list>
<bean class="java.awt.Font">
<constructor-arg index="0"><value>Arial</value></constructor-arg>
<constructor-arg index="1"><value>0</value></constructor-arg>
<constructor-arg index="2"><value>32</value></constructor-arg>
</bean>
</list>
</constructor-arg>
</bean>
<bean id="backGenUni" class="com.octo.captcha.component.image.backgroundgenerator.UniColorBackgroundGenerator">
<!--背景宽度-->
<constructor-arg index="0">
<value>110</value>
</constructor-arg>
<!--背景高度-->
<constructor-arg index="1">
<value>50</value>
</constructor-arg>
</bean>
<bean id="decoratedPaster" class="com.octo.captcha.component.image.textpaster.DecoratedRandomTextPaster">
<!--最大字符长度-->
<constructor-arg type="java.lang.Integer" index="0">
<value>4</value>
</constructor-arg>
<!--最小字符长度-->
<constructor-arg type="java.lang.Integer" index="1">
<value>4</value>
</constructor-arg>
<!--文本颜色-->
<constructor-arg index="2">
<ref bean="colorGen"/>
</constructor-arg>
<!--文本混淆-->
<constructor-arg index="3">
<list>
<!--<ref bean="baffleDecorator"/>-->
</list>
</constructor-arg>
</bean>
<bean id="baffleDecorator" class="com.octo.captcha.component.image.textpaster.textdecorator.BaffleTextDecorator">
<constructor-arg type="java.lang.Integer" index="0"><value>1</value></constructor-arg>
<constructor-arg type="java.awt.Color" index="1"><ref bean="colorWrite"/></constructor-arg>
</bean>
<bean id="colorGen" class="com.octo.captcha.component.image.color.SingleColorGenerator">
<constructor-arg type="java.awt.Color" index="0">
<ref bean="colorBlack"/>
</constructor-arg>
</bean>
<bean id="colorWrite" class="java.awt.Color">
<constructor-arg type="int" index="0">
<value>255</value>
</constructor-arg>
<constructor-arg type="int" index="1">
<value>255</value>
</constructor-arg>
<constructor-arg type="int" index="2">
<value>255</value>
</constructor-arg>
</bean>
<bean id="colorBlack" class="java.awt.Color">
<constructor-arg type="int" index="0">
<value>50</value>
</constructor-arg>
<constructor-arg type="int" index="1">
<value>50</value>
</constructor-arg>
<constructor-arg type="int" index="2">
<value>50</value>
</constructor-arg>
</bean>
</beans>
<servlet>
<servlet-name>captcha</servlet-name>
<servlet-class>cn.itcast.common.JcaptchaServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>captcha</servlet-name>
<url-pattern>/captcha.svl</url-pattern>
</servlet-mapping>
</web-app>4.创建一个session共享类，用于创建session，获取session和销毁session 并交给spring管理
package cn.itcast.common.web;
import java.io.Serializable;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
public class HttpSessionProvide implements SessionProvider
public void setAttribute(HttpServletRequest request, String name, Serializable value)
HttpSession session = request.getSession();
session.setAttribute(name, value);
public Serializable getAttribute(HttpServletRequest request, String name)
HttpSession session = request.getSession(false);
if (session != null)
return(Serializable) session.getAttribute(name);
return null;
public void logout(HttpServletRequest request)
HttpSession session = request.getSession(false);
if (session != null)
session.invalidate();
public String getSessionId(HttpServletRequest request)
return request.getSession().getId();
<?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:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx" xmlns:jdbc="http://www.springframework.org/schema/jdbc"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-3.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd">
<!-- session实例化-->
<bean id="sessionProvider" class="cn.itcast.common.web.HttpSessionProvide"></bean>
</beans>
最后获取生成的验证吗图片
<img src="/captcha.svl" οnclick="this.src='captcha.svl?d='+new Date()" class="code" alt="换一张" /><a href="javascript:void(0);" οnclick="$('.code').attr('src','/captcha.svl?d='+new Date())" title="换一张">换一张</a></li>效果图
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