SpringMVC中使用patchca生成验证码

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一、页面直接使用img标签

二、主要代码如下：

@RequestMapping@Controllerpublic class IdentifyCodeController {private static ConfigurableCaptchaService ccs = new ConfigurableCaptchaService();private static Random random = new SecureRandom();static{ccs.setColorFactory(new ColorFactory() {@Overridepublic Color getColor(int n) {int[] c = new int[3];int i = random.nextInt(c.length);for(int j=0;j<c.length;j++){if(j == i){c[j] = random.nextInt(71);}else{c[j] = random.nextInt(256);}}return new Color(c[0], c[1], c[2]);} });RandomWordFactory rwf = new RandomWordFactory();rwf.setCharacters("23456789abcdefghigkmnpqrstuvwxyzABCDEFGHIGKLMNPQRSTUVWXYZ");rwf.setMaxLength(4);rwf.setMinLength(4);ccs.setWordFactory(rwf);}@RequestMapping(value="/verify.html")public void verifyCode(HttpServletRequest request,HttpServletResponse response) throws IOException{switch(random.nextInt(5)){case 0:ccs.setFilterFactory(new CurvesRippleFilterFactory(ccs.getColorFactory()));break;case 1:ccs.setFilterFactory(new MarbleRippleFilterFactory());break;case 2:ccs.setFilterFactory(new DoubleRippleFilterFactory());break;case 3:ccs.setFilterFactory(new WobbleRippleFilterFactory());break;case 4:ccs.setFilterFactory(new DiffuseRippleFilterFactory());break;}HttpSession session = request.getSession(false);if(session == null){session = request.getSession();}setResponseHeaders(response);String token = EncoderHelper.getChallangeAndWriteImage(ccs, "png", response.getOutputStream());session.setAttribute("captchaToken", token);System.out.println("当前的SessionID=" + session.getId() + "，验证码=" + token);}protected void setResponseHeaders(HttpServletResponse response){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);}}

三、使用jar见附件

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