关于kaptcha的使用问题!
<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd" version="4.0"> <servlet> <servlet-name>InitServlet</servlet-name> <servlet-class>com.imooc.servlet.InitServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>InitServlet</servlet-name> <url-pattern>/index</url-pattern> </servlet-mapping> <jsp-config> <jsp-property-group> <url-pattern>*.jsp</url-pattern> <include-prelude>/jsp/common.jsp</include-prelude> </jsp-property-group> </jsp-config> <servlet> <servlet-name>LoginServlet</servlet-name> <servlet-class>com.imooc.servlet.LoginServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>LoginServlet</servlet-name> <url-pattern>/LoginServlet</url-pattern> </servlet-mapping> <!--生成图片的servlet--> <servlet> <servlet-name>Kaptcha</servlet-name> <servlet-class>com.google.code.kaptcha.servlet.KaptchaServlet</servlet-class> <init-param> <param-name>kaptcha.image.width</param-name> <param-value>200</param-value> </init-param> <init-param> <param-name>kaptcha.image.height</param-name> <param-value>50</param-value> </init-param> <init-param> <param-name>kaptcha.textproducer.char.length</param-name> <param-value>4</param-value> </init-param> <init-param> <param-name>kaptcha.noise.impl</param-name> <param-value>com.google.code.kaptcha.impl.NoNoise</param-value> </init-param> </servlet> <servlet-mapping> <servlet-name>Kaptcha</servlet-name> <url-pattern>/kaptcha.jpg</url-pattern> </servlet-mapping> </web-app>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<!DOCTYPE html>
<html>
<head>
<base href="<%=basePath%>">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>登录页面</title>
<style type="text/css">
.code
{
font-family:Arial;
font-style:italic;
color:blue;
font-size:20px;
border:0;
padding:2px 3px;
letter-spacing:3px;
font-weight:bolder;
float:left;
cursor:pointer;
height:20px;
line-height:20px;
text-align:center;
vertical-align:middle;
}
a
{
text-decoration:none;
font-size:12px;
color:#288bc4;
}
a:hover
{
text-decoration:underline;
}
</style>
</head>
<body>
<center>
<h1>用户登录</h1>
<form action="<%=basePath%>/LoginServlet" method="post" onsubmit="return validateCode()">
<table width="300px" cellspacing="0px" cellpadding="0px" border="1px">
<tr>
<td>用户名</td>
<td colspan="2"><input type="text" name="username" placeholder="用户名为3-12位字母数字或下划线组合"></td>
</tr>
<tr>
<td>密 码</td>
<td colspan="2"><input type="password" name="password" placeholder="长度为5-12位字母数字或下划线组合" ></td>
</tr>
<tr>
<td>验证码</td>
<td style="border-right-style:none;">
<form action="submit.action">
<input type="text" name="checkCode" placeholder="请输入验证码" id="inputCode">
<img src="${basePath}/kaptcha.jpg" />
</form>
</td>
<td style="border-left-style:none;"><div class="code" id="checkCode" ></div></td>
</tr>
<tr>
<td colspan="3" style="text-align:center">
<input type="submit" value="登录">
<input type="reset" value="取消">
</td>
</tr>
</table>
</form>
</center>
</body>
</html>
老师请帮我看看,为什么我的验证码图片显示不出来?
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同学你好！同学把lib目录放在web-inf目录下面，重新添加一下jar包呢
如果我回答解决了你的疑惑，请采纳，祝学习愉快~
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