Javaweb 之使用 Kaptcha 组件使用验证码
web.xml:
<? XSI: Schemalocation = "http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id = "webapp_id Version =" 3.0 "> </display-name> kaptcha </diskutiert"> </displatth <servlet-name> kaptcha </servlet-name> <servlet-classe> com.google.code.kaptcha.servlet.kaptchaservlet </Servlet-Class> </Servlet> <Servlet-Mapping> <Servlet-name> Kaptcha </servlet-name> <Servlet-mapping> /randomcode.jpg </servlet-name> /randomcode.jpg </surl-tame> /randomcing. <Welcome-File-List> <Welcome-File> INDEX </Welcome-File-List> </web-App>
index.jsp:
<%@ page Language = "java" import = "java.util. request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html> <head> <base href="<%=basePath%>"> <title>My JSP 'Index.jsp' Startseite </title> <meta http-äquiv = "pragma" content = "no-cache"> <meta http-äquiv = "cache-control" content = "no-cache"> <meta http-äquiv = "expires" content = "0"> <meta http-äquiv = "keyword1", keyword- meta http-äquiv <meta http-äquiv = "Beschreibung" content = "Dies ist meine Seite"> <!-<link rel = "styleSheet" type = "text/css" href = "styles.css">-> </head> <body> <Form Action = "check.jsp"> <img Src = ", subgs. </form> </body> </html>
check.jsp:
<%@ page Language = "java" import = "java.util. String str = request.getParameter ("r"); if (k.equals (str)) out.print ("wahr"); out.print (""+k+"---"+str);%>结果 ：
验证码部分属性修改说明 ：
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