本篇文章为大家展示了如何在Java中利用patchca实现一个验证码生成功能,内容简明扼要并且容易理解,绝对能使你眼前一亮,通过这篇文章的详细介绍希望你能有所收获。代码如下: @RequestMapping(value = {"
本篇文章为大家展示了如何在Java中利用patchca实现一个验证码生成功能,内容简明扼要并且容易理解,绝对能使你眼前一亮,通过这篇文章的详细介绍希望你能有所收获。
代码如下:
@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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