原创随笔】强大的谷歌开源免费验证码reCAPTCHA
1，首先访问http://code.google.com/intl/zh-CN/apis/recaptcha/intro.html，然后点击左侧相应语言，博主示例用的jsp，所以下载jar包，可直接【点此下载jar包】解压zip中的recaptcha4j-0.0.7.jar至web项目lib下。
2，访问https://www.google.com/recaptcha/admin/create并用google账户登录，在文本框输入自己网站的网址，如global-key.mycompany.com ，点击create key,生成Public Key和Private Key。
3，在jsp中编写示例form
<%@ page import="net.tanesha.recaptcha.ReCaptcha" %> <%@ page import="net.tanesha.recaptcha.ReCaptchaFactory" %> <html> <body> <form action="" method="post"> <% ReCaptcha c = ReCaptchaFactory.newReCaptcha("填入之前生成的public_key", "填入之前生成的private_key", false); out.print(c.createRecaptchaHtml(null, null)); %> <input type="submit" value="submit" /> </form> </body> </html>
4，编写示例服务端接收校验
<%@ page import="net.tanesha.recaptcha.ReCaptchaImpl" %> <%@ page import="net.tanesha.recaptcha.ReCaptchaResponse" %> <html> <body> <% String remoteAddr = request.getRemoteAddr(); ReCaptchaImpl reCaptcha = new ReCaptchaImpl(); reCaptcha.setPrivateKey("填入之前生成的private_key"); String challenge = request.getParameter("recaptcha_challenge_field"); String uresponse = request.getParameter("recaptcha_response_field"); ReCaptchaResponse reCaptchaResponse = reCaptcha.checkAnswer(remoteAddr, challenge, uresponse); if (reCaptchaResponse.isValid()) { out.print("Answer was entered correctly!"); } else { out.print("Answer is wrong"); } %> </body> </html>
谷歌验证码
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转载自jin-deng.iteye.com/blog/1844380
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