java patchca生成验证码 Java中使用patchca生成超炫的验证码
zsg88 人气:0想了解Java中使用patchca生成超炫的验证码的相关内容吗,zsg88在本文为您仔细讲解java patchca生成验证码的相关知识和一些Code实例,欢迎阅读和指正,我们先划重点:java,patchca验证码,java,验证码,下面大家一起来学习吧。
官网: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(); }
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