📄 first.jsp
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<%@ page contentType="text/html; charset=gb2312" import="java.awt.*,java.awt.image.*,java.util.*,javax.imageio.*" %>
<html>
<head>
<title>jsp生成彩色汉字验证码</title>
</head>
<script language="javascript">
function my()
{
if(document.form1.rand.value=="")
{
alert("请输入验证码！");
return;
}
else
{
document.form1.submit();
}
}
function Refresh()
{
var ccImg = document.getElementById("checkCodeImg");
var ccImgSrc = "";
if (ccImg)
{
if (document.all)
{
ccImgSrc = "image.jsp";
}
else
{
nowTime = new Date()
ccImgSrc = "image.jsp" + nowTime.getTime();
}
ccImg.src = ccImgSrc;
}
}
</script>
<body>
<%request.setCharacterEncoding("gb2312");%>
<form name="form1" method="post" action="check.jsp">
<input name="rand" type="text" maxlength="6">
<img src="hanzi.jsp" id="checkCodeImg"/><a href="javascript:Refresh();" target="_self">换一张</a>
<input type="button" name="Submit" value="提交" onClick="my()">
</form>
</body>
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