用户注册加入验证码
从同事那弄过来,拿来主义了.
 
用到一个jar包(附件里有)
jsp测试页:
<%@ page contentType="text/html; charset=GBK" %>
<%@ page import = "cn.com.enorth.util.imgcode.ImageCodeUtils" %>
<%
String txt = "";
String rightCode = ImageCodeUtils.getCodeValue(request);
if(ImageCodeUtils.isGoodCode(request,"thecode")){
    txt="yes";
}
else{
    txt="no";
}
%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>test p_w_picpath code</title>
<script language="javascript">
function reloadImg(){
var i = Math.random();
document.getElementById("imgCode").src="imgcode?"+i;
}
</script>
</head>
<body bgcolor="#ffffff">
<form action="test.jsp" method="POST" name="form1">
    <img id="imgCode" src="imgcode" border="0">
    <input type="text" name="thecode"/>    <a href="javascript:reloadImg();">看不清？</a>
    <br>
    <input type="submit" name="submit" value="submit" />     <%=txt%>
</form>
<a href="changetype.jsp">change type</a>
</body>
</html>
 
自己的用法:
页面
<tr>
      <td width="30%" align="right">
        <img id="imgCode" src="imgcode" border="0" />
      </td>
      <td>
            <input type="text" name="thecode"/><font color="red">*</font>
            <a href="javascript:reloadImg();">看不清？</a>
            <font color="red">${VerificationError }</font>
      </td>
    </tr>
 
程序中(如果验证码输入正确...)
if (ImageCodeUtils.isGoodCode(request, "thecode")){
     ...
     ...
     return SUCCESS;
}