jcaptcha学习spring整合

  继续，上篇jcaptcha学习，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