在Spring中施用jcaptcha实现图片验证

2012-07-24

在Spring中使用jcaptcha实现图片验证转载来自http://sha0k.iteye.com/blog/1364950在Spring中使用jcaptcha

在Spring中使用jcaptcha实现图片验证
转载来自http://sha0k.iteye.com/blog/1364950

在Spring中使用jcaptcha首先要添加jcaptcha的包我使用的是jcaptcha-1.0-all.jar 官网http://jcaptcha.sourceforge.net/jcaptcha/index.html
还要添加commons-collections-*.*.jar 版本自己控制
首先是ApplicationContext.xml的配置，这里主要是对验证码生成器服务的注入，控制类就是Spring Web中的Controller，没有什么特别的
Xml代码
<bean id="imageCaptchaService" index="0">
            <ref bean="fastHashMapCaptchaStore"/>
        </constructor-arg>
        
        <constructor-arg type="com.octo.captcha.engine.CaptchaEngine" index="1">
            <ref bean="captchaEngineEx"/>
        </constructor-arg>
        <constructor-arg index="2">
            <value>180</value>
        </constructor-arg>
        <constructor-arg index="3">
            <value>100000</value>
        </constructor-arg>
        <constructor-arg index="4">
            <value>75000</value>
        </constructor-arg>
    </bean>
    <bean id="fastHashMapCaptchaStore"
        content="no-cache">
    <meta http-equiv="cache-control" content="no-cache">
    <meta http-equiv="expires" content="0">
    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
    <meta http-equiv="description" content="This is my page">
    

</head>

<body>
    <img alt="在Spring中施用jcaptcha实现图片验证" src="generatImage">
</body>
</html>

验证用户输入的验证码的控制类
Java代码
import java.io.IOException;

import javax.annotation.Resource;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

import com.octo.captcha.service.CaptchaServiceException;
import com.octo.captcha.service.image.ImageCaptchaService;

@Controller
public class ImageValidationController {

    @Resource(name = "imageCaptchaService")
    ImageCaptchaService imageCaptchaService;

    @RequestMapping(value = "/validateImage")
    public void ValidateCaptchaImage(HttpServletRequest request,
            HttpServletResponse response)throws ServletException , IOException {
        Boolean isResponseCorrect = Boolean.FALSE;
        //remenber that we need an id to validate!
        String captchaId = request.getSession().getId();
        //retrieve the response
        String captcha_value = request.getParameter("captcha_value");
        // Call the Service method
        try {
            isResponseCorrect = imageCaptchaService.validateResponseForID(captchaId, captcha_value);
        } catch (CaptchaServiceException e) {
            //should not happen, may be thrown if the id is not valid
        }
        System.out.println(isResponseCorrect);
       // httpServletResponse.encodeUrl("sucess.html");
        if(isResponseCorrect.booleanValue()){
            response.sendRedirect("success.html");
        }
        else {
            response.sendRedirect("failture.html");
        }
    }
}
验证页面：

Html代码
<html>
<head>
    <base href="<%=basePath%>">
    <script type="text/javascript"
            src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script>
        <script type="text/javascript"
            src="http://jquery-json.googlecode.com/files/jquery.json-2.2.min.js"></script>
        <script type="text/javascript">

                function ajaxRefresh(){

                document.getElementById("image").contentWindow.location.reload();
                }


        </script>

    <title>My JSP 'image.jsp' starting page</title>

    <meta http-equiv="pragma" content="no-cache">
    <meta http-equiv="cache-control" content="no-cache">
    <meta http-equiv="expires" content="0">
    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
    <meta http-equiv="description" content="This is my page">
    

</head>

<body>
    <iframe src="getimg.jsp" id="image"></iframe>
    <a href="javascript:void(0)" onclick="ajaxRefresh()">ajaxRefresh</a>
    <form action="validateImage">
        <input type='text' name='captcha_value'>
        <input type="submit" value="提交">
    </form>
</body>
</html>

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在Spring中施用jcaptcha实现图片验证