private Producer createCaptchaProducer(
int width, int height, int length, String possibleSymbols) {
Properties props = new Properties();
props.setProperty("kaptcha.textproducer.char.string", possibleSymbols);
props.setProperty("kaptcha.textproducer.char.length", String.valueOf(length));
props.setProperty("kaptcha.image.width", String.valueOf(width));
props.setProperty("kaptcha.image.height", String.valueOf(height));
Config conf = new Config(props);
DefaultKaptcha captcha = new DefaultKaptcha();
captcha.setConfig(conf);
return captcha;
}
private String getCaptchaText() {
if (preDefinedTexts != null && !preDefinedTexts.isEmpty()) {
String text = preDefinedTexts.get(textCount);
textCount = (textCount + 1) % preDefinedTexts.size();
return text;
} else {
return producer.createText();
}
}
@Override
public byte[] generateCaptchaImage(String captchaKey) throws AccountCaptchaException {
String text = captchaMap.get(captchaKey);
if (text == null) {
throw new AccountCaptchaException("Captch key" + captchaKey + " not found!");
}
BufferedImage image = producer.createImage(text);
ByteArrayOutputStream out = new ByteArrayOutputStream();
try {
ImageIO.write(image, "jpg", out);
} catch (IOException e) {
throw new AccountCaptchaException("Failed to write captcha stream!", e);
}
return out.toByteArray();
}
@Override
public void afterPropertiesSet() throws Exception {
producer = new DefaultKaptcha();
producer.setConfig(new Config(new Properties()));
}