用 jcaptcha 自定义验证码

用 jcaptcha 自定义验证码2008-03-20 14:58package common.web;

import com.octo.captcha.service.captchastore.FastHashMapCaptchaStore;
import com.octo.captcha.service.image.DefaultManageableImageCaptchaService;
import com.octo.captcha.service.image.ImageCaptchaService;

public class CaptchaServiceSingleton {
    
    private static ImageCaptchaService instance = new DefaultManageableImageCaptchaService();
    static {
    instance = new DefaultManageableImageCaptchaService(
       new FastHashMapCaptchaStore(),
       new MyImageCaptchaEngine(),
       180,
       100000,
       75000);
    }
    
    public static ImageCaptchaService getInstance(){
        return instance;
    }
}

===========================================================================

package common.web;

import java.awt.Font;

import com.octo.captcha.component.image.backgroundgenerator.BackgroundGenerator;
import com.octo.captcha.component.image.backgroundgenerator.FunkyBackgroundGenerator;
import com.octo.captcha.component.image.color.RandomRangeColorGenerator;
import com.octo.captcha.component.image.fontgenerator.FontGenerator;
import com.octo.captcha.component.image.fontgenerator.RandomFontGenerator;
import com.octo.captcha.component.image.textpaster.RandomTextPaster;
import com.octo.captcha.component.image.textpaster.TextPaster;
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;

public class MyImageCaptchaEngine extends ListImageCaptchaEngine {
    protected void buildInitialFactories() {
           WordGenerator wgen = new RandomWordGenerator("abcdefghijklmnopquvwxyz123456789");
           RandomRangeColorGenerator cgen = new RandomRangeColorGenerator(
                new int[] {0, 100},
                new int[] {0, 100},
                new int[] {0, 100});
           //文字显示4个数
           TextPaster textPaster = new RandomTextPaster(new Integer(4), new Integer(4), cgen, true);
           //图片的大小
           BackgroundGenerator backgroundGenerator = new FunkyBackgroundGenerator(new Integer(200), new Integer(45));

           Font[] fontsList = new Font[] {
               new Font("Arial", 0, 10),
               new Font("Tahoma", 0, 10),
               new Font("Verdana", 0, 10),
            };
         
           FontGenerator fontGenerator = new RandomFontGenerator(new Integer(20), new Integer(30), fontsList);

            WordToImage wordToImage = new ComposedWordToImage(fontGenerator, backgroundGenerator, textPaster);
            this.addFactory(new GimpyFactory(wgen, wordToImage));
    }
}

===========================================================================

/**
*
*/

package common.web;

import com.octo.captcha.service.CaptchaServiceException;
import com.sun.image.codec.jpeg.JPEGCodec;
import com.sun.image.codec.jpeg.JPEGImageEncoder;

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 java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
import java.io.IOException;


public class ImageCaptchaServlet extends HttpServlet {


    public void init(ServletConfig servletConfig) throws ServletException {

        super.init(servletConfig);

    }


    protected void doGet(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse) throws