页面显示正常，后台却输出Servlet.service() for servlet [jsp] in context with path [/luntan] t

不要看代码多，其实 就那么几行诗重要的 ，只是为了方便 我全粘上去了 谢谢啦我做了一个注册界面 register.jsp  在地址栏输入后，页面显示正常，后台却显示错误
register.jsp 代码如下：<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">
   
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>注册网页</title>
</head>
<link href="css/1.css" rel="stylesheet" type="text/css" />
<body><center>
<table cellspacing=0 width="1043" border="0" align="center" bordercolor="#308ECB">
  <tr bgcolor=#308ECB>
   <jsp:include page="head.jsp"></jsp:include>
  </tr>
 <tr> <jsp:include page="register1.jsp"></jsp:include>
  </tr></table></center>
</body>
</html>head.jsp代码如下：
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = 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 'head.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">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
<style type="text/css">
<!--
a:link {font-family:"宋体";text-decoration:none}
a:visited {font-family:"宋体";text-decoration:none}
a:hover {font-family:"宋体";text-decoration:none}
-->
</style>
  </head>
  
  <body>
    <center>
  <table width="1043" border="0">
  <tr>
    <td width="60"><div id="my" align="center"><a href="#">技术论坛首页</a></div></td>
    <td width="50"><div align="center"><a href="#">资讯</a></div></td>
    <td width="50"><div align="center"><a href="#">论坛</a></div></td>
    <td width="50"><div align="center"><a href="#">博客</a></div></td>
    <td width="50"><div align="center"><a href="#">下载</a></div></td>
    <td width="50"><div align="center"><a href="#">搜索</a></div></td>
    <td width="50"><div align="center"><a href="#">更多</a></div></td>
  
  </tr>
</table>
 </center></body>
</html>
  
register1.jsp代码如下：<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = 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 'register1.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">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
<script type="text/javascript"  language="javascript" src="js/checkreg.js"></></script>
  </head>
  
  <body><form name="userregisterform" action="RegCheServelt" method="post" onsubmit="return checkForm(this)">
   <table width="1043" border="0" align="center" bordercolor="#F0F0F0">
  <tr>
    <td  colspan="3"><div align="center" ><img src="images/reg.PNG" width="74" height="28" align="middle" /></div></td>
  </tr>
  <tr>
    <td colspan="2"><table width="100%" border="0">
      <tr>
        <td width="33%" class="STYLE2">填写会员信息</td>
        <td width="33%" class="STYLE2">邮箱验证</td>
        <td width="33%" class="STYLE2">注册成功</td>
      </tr>
    </table>
    </td>
  </tr>
  
  <tr>
    <td><div align="right" class="STYLE2">*用户名：</div></td>
    <td width="715" colspan="-4"><input type="text" name="username" maxlength="16">
      （
      字母、下划线、减号，开头只能是字母，长度为）</td>
  </tr>
  <tr>
    <td><div align="right" class="STYLE2">*密码</div></td>
    <td colspan="-4"><input type="password" name="password1" >
      （长度大于6位小于16位）</td>
  </tr>
  <tr>
    <td><div align="right" class="STYLE2">*确认密码</div></td>
    <td colspan="-4"><input type="password" name="password2" >
      （确保密码输入正确）</td>
  </tr>
  <tr>
    <td><div align="right" class="STYLE2">*邮箱</div></td>
    <td colspan="-4"><input type="text" name="email" >
      （请输入正确的邮箱）</td>
  </tr>
  <tr>
    <td><div align="right" class="STYLE2">*验证码</div></td>
    <td colspan="-4"><input type="text" name="checkcode" ></td>
  </tr>
  <tr>
    <td align="center" colspan="2"><img src="image.jsp"/></td>
  </tr>
  <tr>
    <td colspan="2"><div align="center" class="STYLE2"><input type=image name="sb" src="images/register.PNG"></div></td>
  </tr>
  <tr>
    <td colspan="2">&nbsp;</td>
  </tr>
  <tr>
    <td colspan="2">&nbsp;</td>
  </tr>
  <tr>
    <td colspan="2">&nbsp;</td>
  </tr>
  <tr>
    <td colspan="2" bordercolor="#F0F0F0">&nbsp;</td>
  </tr>
  <tr>
    <td colspan="2">&nbsp;</td>
  </tr>
  <tr>
    <td colspan="2">&nbsp;</td>
  </tr>
  <tr>
    <td colspan="2">&nbsp;</td>
  </tr>
 
</table> </form>
  </body>
</html>