JCaptcha-SpringMVC集成

GMail验证码样式的图片引擎:

 

import java.awt.Color;
import java.awt.Font;
import java.awt.image.ImageFilter;

import com.octo.captcha.component.image.backgroundgenerator.BackgroundGenerator;
import com.octo.captcha.component.image.backgroundgenerator.UniColorBackgroundGenerator;
import com.octo.captcha.component.image.color.RandomListColorGenerator;
import com.octo.captcha.component.image.deformation.ImageDeformation;
import com.octo.captcha.component.image.deformation.ImageDeformationByFilters;
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.TextDecorator;
import com.octo.captcha.component.image.wordtoimage.DeformedComposedWordToImage;
import com.octo.captcha.component.image.wordtoimage.WordToImage;
import com.octo.captcha.component.word.FileDictionary;
import com.octo.captcha.component.word.wordgenerator.ComposeDictionaryWordGenerator;
import com.octo.captcha.component.word.wordgenerator.WordGenerator;
import com.octo.captcha.engine.image.ListImageCaptchaEngine;
import com.octo.captcha.image.gimpy.GimpyFactory;

/**
 * 仿照JCaptcha2.0编写GMail验证码样式的图片引擎.
 * 
 * @author calvin
 */
public class GMailEngine extends ListImageCaptchaEngine {
	@Override
	protected void buildInitialFactories() {
		int minWordLength = 4;
		int maxWordLength = 5;
		int fontSize = 50;
		int imageWidth = 250;
		int imageHeight = 100;

		//word generator
		WordGenerator dictionnaryWords = new ComposeDictionaryWordGenerator(new FileDictionary("toddlist"));

		//word2image components
		TextPaster randomPaster = new DecoratedRandomTextPaster(minWordLength, maxWordLength,
				new RandomListColorGenerator(new Color[] { new Color(23, 170, 27), new Color(220, 34, 11), new Color(23, 67, 172) }), new TextDecorator[] {});
		BackgroundGenerator background = new UniColorBackgroundGenerator(imageWidth, imageHeight, Color.white);
		FontGenerator font = new RandomFontGenerator(fontSize, fontSize, new Font[] {
				new Font("nyala", Font.BOLD, fontSize), new Font("Bell MT", Font.PLAIN, fontSize),
				new Font("Credit valley", Font.BOLD, fontSize) });

		ImageDeformation postDef = new ImageDeformationByFilters(new ImageFilter[] {});
		ImageDeformation backDef = new ImageDeformationByFilters(new ImageFilter[] {});
		ImageDeformation textDef = new ImageDeformationByFilters(new ImageFilter[] {});

		WordToImage word2image = new DeformedComposedWordToImage(font, background, randomPaster, backDef, textDef, postDef);
		addFactory(new GimpyFactory(dictionnaryWords, word2image));
	}

}

 产生图片单例:

 

 

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

/**
 * 按照官方的做法： 一定为单例
 */
public class CaptchaServiceSingleton {
	private static ImageCaptchaService instance = new DefaultManageableImageCaptchaService(new FastHashMapCaptchaStore(), new GMailEngine(), 180, 100000 , 75000);
//	private static ImageCaptchaService instance=new DefaultManageableImageCaptchaService();
    public static ImageCaptchaService getInstance(){
        return instance;
    }
}

 SpringMVC:Controller:

 

 

@RequestMapping(value="getCaptcha",headers = "Accept=image/jpeg, image/jpg, image/png, image/gif") //,produces = "image/jpg"
	public @ResponseBody byte[] getCaptcha(HttpServletRequest request,HttpServletResponse response) throws Exception {
		String captchaId = request.getSession(true).getId();
		BufferedImage challenge = (BufferedImage)CaptchaServiceSingleton.getInstance().getChallengeForID(captchaId, request.getLocale());
		ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
		ImageIO.write(challenge, "jpg", byteArrayOutputStream);
		return byteArrayOutputStream.toByteArray();
	}

 页面:

 

<label>验证码：</label>
						<input class="jcaptcha_code" name="jcaptcha_code" type="text" size="6" />
						<span><img id="img_jcaptcha" src="${ctx}/login/getCaptcha.htm" alt="" width="75" height="24" onclick="changeJcaptchaSrc();" /></span>

<script type="text/javascript">
function changeJcaptchaSrc(){
		document.getElementById("img_jcaptcha").src='${ctx}/login/getCaptcha.htm?_='+(new Date()).getTime();
		}
</script>