Implementing Captcha for J2EE application
Here I am going to explain how you can add captcha to J2EE based web
application.
List of jar files requored:
1.
jcaptcha-2.0-alpha-1-SNAPSHOT.jar
2.
jcaptcha-api-1.0.jar
3.
jcaptcha-integration-simple-servlet-2.0-alpha-1-SNAPSHOT.jar
As you going to have captcha for you application you have to make below
entry in you web.xml file.
Servlet definition for Captcha
<servlet>
<servlet-name>jcaptcha</servlet-name>
<servlet-class>com.octo.captcha.module.servlet.image.SimpleImageCaptchaServlet</servlet-class>
</servlet>
<servlet-name>jcaptcha</servlet-name>
<servlet-class>com.octo.captcha.module.servlet.image.SimpleImageCaptchaServlet</servlet-class>
</servlet>
Servlet mapping for captcha
<servlet-mapping>
<servlet-name>jcaptcha</servlet-name>
<url-pattern>/jcaptcha.jpg</url-pattern>
</servlet-mapping>
Show captcha Image
<p:graphicImage
id="captchaImage" value="jcaptcha.jpg" />
Taking input from user
<p:inputText styleClass="textfield" value="#{customerBean.captchaText}"
required="true" requiredMessage="Enter security
code"></p:inputText>
Validating Input with captcha text
HttpServletRequest request =
(HttpServletRequest)
FacesContext.getCurrentInstance().getExternalContext().getRequest();
boolean isCaptchaValidate =
SimpleImageCaptchaServlet.validateResponse(request,customerBean.getCaptchaText());
Now you can enjoy captcha on
you applicaiton
