package com.g.core.common.JCaptcha;
import java.awt.Color;
import java.awt.Font;
import com.octo.captcha.component.image.backgroundgenerator.BackgroundGenerator;
import com.octo.captcha.component.image.backgroundgenerator.FileReaderRandomBackgroundGenerator;
import com.octo.captcha.component.image.color.RandomListColorGenerator;
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.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 JCaptchaEngine extends ListImageCaptchaEngine {
public static final String IMAGE_CAPTCHA_KEY = "imageCaptcha";//The ImageCaptcha object is stored in the key in the Session
public static final String CAPTCHA_INPUT_NAME = "j_captcha";//Enter the form name with the verification code
public static final String CAPTCHA_IMAGE_URL = "/captcha.jpg";//Verification code image URL
private static final Integer MIN_WORD_LENGTH = 4;//Minimum length of verification code
private static final Integer MAX_WORD_LENGTH = 4;//Captcha maximum length
private static final Integer IMAGE_HEIGHT = 28;//Captcha image height
private static final Integer IMAGE_WIDTH = 80;//Captcha image width
private static final Integer MIN_FONT_SIZE = 16;//Captcha minimum font
private static final Integer MAX_FONT_SIZE = 16;//Captcha maximum font
private static final String RANDOM_WORD = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";//Random characters
private static final String IMAGE_PATH = "./captcha/";//Random background image path
//Captcha random font
private static final Font[] RANDOM_FONT = new Font[] {
new Font("nyala", Font.BOLD, MIN_FONT_SIZE),
new Font("Arial", Font.BOLD, MIN_FONT_SIZE),
new Font("Bell MT", Font.BOLD, MIN_FONT_SIZE),
new Font("Credit valley", Font.BOLD, MIN_FONT_SIZE),
new Font("Impact", Font.BOLD, MIN_FONT_SIZE)
};
//Verification code random color
private static final Color[] RANDOM_COLOR = new Color[] {
new Color(255, 255, 255),
new Color(255, 220, 220),
new Color(220, 255, 255),
new Color(220, 220, 255),
new Color(255, 255, 220),
new Color(220, 255, 220)
};
//Generate verification code
@Override
protected void buildInitialFactories() {
RandomListColorGenerator randomListColorGenerator = new RandomListColorGenerator(RANDOM_COLOR);
BackgroundGenerator backgroundGenerator = new FileReaderRandomBackgroundGenerator(IMAGE_WIDTH, IMAGE_HEIGHT, IMAGE_PATH);
WordGenerator wordGenerator = new RandomWordGenerator(RANDOM_WORD);
FontGenerator fontGenerator = new RandomFontGenerator(MIN_FONT_SIZE, MAX_FONT_SIZE, RANDOM_FONT);
TextDecorator[] textDecorator = new TextDecorator[] {};
TextPaster textPaster = new DecoratedRandomTextPaster(MIN_WORD_LENGTH, MAX_WORD_LENGTH, randomListColorGenerator, textDecorator);
WordToImage wordToImage = new ComposedWordToImage(fontGenerator, backgroundGenerator, textPaster);
addFactory(new GimpyFactory(wordGenerator, wordToImage));
}
}
package com.g.core.common.JCaptcha;
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 =null;
public CaptchaServiceSingleton() {
}
//Using the synchronized keyword to resolve thread insecurity
public synchronized static ImageCaptchaService getInstance() {
if (instance == null) {
instance = new DefaultManageableImageCaptchaService(new FastHashMapCaptchaStore(), new JCaptchaEngine(), 180,
100000 , 75000);
}
return instance;
}
}
package com.g.core.render;
import java.awt.image.BufferedImage;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.servlet.ServletOutputStream;
import com.g.core.common.JCaptcha.CaptchaServiceSingleton;
import com.jfinal.kit.StringKit;
import com.jfinal.render.Render;
public class JCaptchaRender extends Render {
private String randomCodeKey;
public JCaptchaRender(String randomCodeKey) {
if (StringKit.isBlank(randomCodeKey))
throw new IllegalArgumentException("randomCodeKey can not be blank");
this.randomCodeKey = randomCodeKey;
}
@Override
public void render() {
response.setHeader("Cache-Control", "no-store");
response.setHeader("Pragma", "no-cache");
response.setDateHeader("Expires", 0);
response.setContentType("image/jpeg");
ServletOutputStream sos = null;
try {
sos = response.getOutputStream();
// String captchaId = request.getSession(true).getId();
BufferedImage challenge = (BufferedImage) CaptchaServiceSingleton.getInstance().getChallengeForID(randomCodeKey, request.getLocale());
ImageIO.write(challenge, "jpg", sos);
sos.flush();
} catch (Exception e) {
throw new RuntimeException(e);
}
finally {
if (sos != null)
try {sos.close();} catch (IOException e) {e.printStackTrace();}
}
}
}
public void random_code() {
render(new JCaptchaRender(getSession().getId()));
}