com.google.code.kaptcha.Producer Java Examples

@Bean
public Producer kaptchaProducer()  {
    Properties properties = new Properties();
    properties.setProperty("kaptcha.image.width", "100");
    properties.setProperty("kaptcha.image.height", "40");
    properties.setProperty("kaptcha.textproducer.font.size", "32");  // 字号
    properties.setProperty("kaptcha.textproducer.font.color", "0,0,0");  // 字体颜色
    properties.setProperty("kaptcha.textproducer.char.string", "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYAZ");
    properties.setProperty("kaptcha.textproducer.char.length", "4");  // 验证码数量
    properties.setProperty("kaptcha.noise.impl", "com.google.code.kaptcha.impl.NoNoise");  // 设置干扰

    DefaultKaptcha kaptcha = new DefaultKaptcha();
    Config config = new Config(properties);
    kaptcha.setConfig(config);
    return kaptcha;
}
 

/**
 * 获取登录的图片验证码
 */
@RequestMapping(value = "/imgcode", method = RequestMethod.GET)
public void captcha(HttpServletRequest request, HttpServletResponse response )
		throws ServletException, IOException {
	Subject currentUser = SecurityUtils.getSubject();
	Session session = currentUser.getSession();
	Producer captchaProducer = KaptchaProducerAgency.getKaptchaProducerExample();
	response.setDateHeader("Expires", 0);
	// Set standard HTTP/1.1 no-cache headers.
	response.setHeader("Cache-Control",
			"no-store, no-cache, must-revalidate");
	// Set IE extended HTTP/1.1 no-cache headers (use addHeader).
	response.addHeader("Cache-Control", "post-check=0, pre-check=0");
	// Set standard HTTP/1.0 no-cache header.
	response.setHeader("Pragma", "no-cache");
	// return a jpeg
	response.setContentType("image/jpeg");
	// create the text for the image
	String capText = captchaProducer.createText();
	log.debug("******************验证码是: " + capText + "******************");
	// store the text in the session
	session.setAttribute(Constants.KAPTCHA_SESSION_KEY, capText	);
	// create the image with the text
	BufferedImage bi = captchaProducer.createImage(capText);
	ServletOutputStream out = response.getOutputStream();
	// write the data out
	ImageIO.write(bi, "jpg", out);
	try {
		out.flush();
	} finally {
		out.close();
	}
}
 

/**
 * Captcha Producer  Config .
 * @return Producer
 * @throws IOException kaptcha.properties is null
 */
@Bean (name = "captchaProducer")
public Producer captchaProducer() throws IOException {
    Resource resource = new ClassPathResource(
            ConstantsProperties.classPathResource(ConstantsProperties.kaptchaPropertySource));
    _logger.debug("Kaptcha config file " + resource.getURL());
    DefaultKaptcha  kaptcha = new DefaultKaptcha();
    Properties properties = new Properties();
    properties.load(resource.getInputStream());
    Config config = new Config(properties);
    kaptcha.setConfig(config);
    return kaptcha;
}
 

@Autowired
public void setCaptchaProducer(Producer captchaProducer){
    this.captchaProducer = captchaProducer;
}
 

/**
 * Generate the captcha image.
 *
 * @return CaptchaInfoBean
 * @throws Exception - no exception handling here.
 *                   Exceptions in generating the captcha are thrown as they are.
 */
public static CaptchaInfoBean generateCaptchaImage() throws Exception {
    String randomSecretKey = UUID.randomUUID().toString();  //random string for the captcha.
    String imagePath = CaptchaMgtConstants.CAPTCHA_IMAGES_PATH +
            RegistryConstants.PATH_SEPARATOR + randomSecretKey + ".jpg";

    Config config = new Config(new Properties());
    Producer captchaProducer = config.getProducerImpl();
    String captchaText = captchaProducer.createText();

    BufferedImage image = captchaProducer.createImage(captchaText);

    File tempFile = File.createTempFile("temp-", ".jpg");

    try {
        ImageIO.write(image, "jpg", tempFile);

        byte[] imageBytes = CarbonUtils.getBytesFromFile(tempFile);

        // saving the image
        Registry superTenantRegistry = CaptchaMgtServiceComponent.getConfigSystemRegistry(
                MultitenantConstants.SUPER_TENANT_ID);
        Resource imageResource = superTenantRegistry.newResource();
        imageResource.setContent(imageBytes);
        superTenantRegistry.put(imagePath, imageResource);


        // prepare the captcha info bean
        CaptchaInfoBean captchaInfoBean = new CaptchaInfoBean();
        captchaInfoBean.setSecretKey(randomSecretKey);   //random generated value as secret key
        captchaInfoBean.setImagePath("registry" + RegistryConstants.PATH_SEPARATOR + "resource" +
                RegistryConstants.CONFIG_REGISTRY_BASE_PATH + imagePath);

        // now create an entry in the registry on the captcha
        Resource recordResource = superTenantRegistry.newResource();
        ((ResourceImpl) recordResource).setVersionableChange(false); // no need to version
        recordResource.setProperty(CaptchaMgtConstants.CAPTCHA_TEXT_PROPERTY_KEY, captchaText);
        recordResource.setProperty(CaptchaMgtConstants.CAPTCHA_PATH_PROPERTY_KEY, imagePath);

        superTenantRegistry.put(CaptchaMgtConstants.CAPTCHA_DETAILS_PATH +
                        RegistryConstants.PATH_SEPARATOR + randomSecretKey,
                recordResource);
        if (log.isDebugEnabled()) {
            log.debug("Successfully generated the captcha image.");
        }
        return captchaInfoBean;
    } finally {
        if (!tempFile.delete()) {
            log.warn("Could not delete " + tempFile.getAbsolutePath());
        }
    }
}
 

@Autowired  
public void setCaptchaProducer(Producer captchaProducer) {  
    this.captchaProducer = captchaProducer;  
}
 

public void setCaptchaProducer(Producer captchaProducer) {
    this.captchaProducer = captchaProducer;
}
 

@Autowired  
public void setCaptchaProducer(Producer captchaProducer) {  
    this.captchaProducer = captchaProducer;  
}
 

public void setCaptchaProducer(Producer captchaProducer) {
	this.captchaProducer = captchaProducer;
}
 

/**
 * Sets captcha producer.
 *
 * @param captchaProducer the captcha producer
 */
public void setCaptchaProducer(Producer captchaProducer) {
	this.captchaProducer = captchaProducer;
}