patchca生成超炫的验证码

落日映苍穹つ 2022-06-13 02:48 155阅读 0赞

官网：[http://code.google.com/p/patchca/][http_code.google.com_p_patchca]

/**
         * 验证码
         *
         * @param width  图片宽度
         * @param height 图片高度
         * @param number 验证码数量
         */
        @RequestMapping(value = {"/captcha"})
        public void captcha(HttpServletRequest request,
                            HttpServletResponse response, @RequestParam("w") int width, @RequestParam("h") int height, @RequestParam("n") int number) throws IOException {
            ConfigurableCaptchaService cs = new ConfigurableCaptchaService();
            cs.setColorFactory(new SingleColorFactory(new Color(25, 60, 170)));
            cs.setFilterFactory(new CurvesRippleFilterFactory(cs.getColorFactory()));
            RandomFontFactory ff = new RandomFontFactory();
            ff.setMinSize(30);
            ff.setMaxSize(30);
            RandomWordFactory rwf = new RandomWordFactory();
            rwf.setMinLength(number);
            rwf.setMaxLength(number);
            cs.setWordFactory(rwf);
            cs.setFontFactory(ff);
            cs.setHeight(height);
            cs.setWidth(width);
    
            response.setContentType("image/png");
            response.setHeader("Cache-Control", "no-cache, no-store");
            response.setHeader("Pragma", "no-cache");
            long time = System.currentTimeMillis();
            response.setDateHeader("Last-Modified", time);
            response.setDateHeader("Date", time);
            response.setDateHeader("Expires", time);
    
            ServletOutputStream stream = response.getOutputStream();
            String validate_code = EncoderHelper.getChallangeAndWriteImage(cs,
                    "png", stream);
    
            Subject subject = SecurityUtils.getSubject();
            subject.getSession().setAttribute(formAuthenticationFilter.getCaptchaParam(), validate_code);
    
            stream.flush();
            stream.close();
        }

![Center][]

[http_code.google.com_p_patchca]: http://code.google.com/p/patchca/
[Center]: /images/20220613/d80f063dac9a4edaa8761b080f5d6cbc.png