急求一个jsp代码里面的疑问

首先在后台servlet代码中，加入了wResultData.setModelCode()，然后在前台jsp文件中取出，显示在叶面，但是总提示Error,请诸位大哥帮我检查一下，看看问题出在那里？而且最好能推荐给我一个好的jsp页面调试工具，谢谢了！<%@ page errorPage="/public_html/DAPX/DAPX9999/JspError.jsp" session="false" contentType="text/html; charset=GBK"%><%@ page import="JP.co.SMOJ.DAPA.DAPX7010.model.AResultData" %>
<%@ page import="java.util.*" %>
<%@ page import="JP.co.SMOJ.DAPA.DAPA0000.model.ACodePatcher" %>
<%
//寢壥僨乕僞傪庢摼偡傞
String strSessionID = (String)request.getAttribute("SessionID");
    AResultData wResultData = (AResultData)request.getAttribute(strSessionID);

// 僒乕僶XML儊僢僙乕僕
String wServerXMLMessage = (String)request.getAttribute("DAPA0001.APP.XMLMESSAGE");
if(wServerXMLMessage == null)
{
wServerXMLMessage = "";
}
%><HTML>
<HEAD>
<META HTTP-EQUIV="Content-Language" CONTENT="cn">
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=GBK">
<XML id = "xmlMessage"><%= wServerXMLMessage %></XML>
<TITLE>Master Information(DAPX7010)</TITLE>
<LINK REL="STYLESHEET" TYPE="text/css" HREF="/dap/public_html/DAPX/common/DAPX0000.css" TITLE="DAPX0000.css">
<SCRIPT language="JavaScript" src="/dap/public_html/DAPX/common/DAPX3005.js"></SCRIPT>
<SCRIPT language="JavaScript" src="/dap/public_html/DAPA/DAPA0000/ACodePatcher.js"></SCRIPT>
<SCRIPT language="JavaScript" SRC="/dap/public_html/DAPA/common/CommonFunction.js"></script><SCRIPT language="JavaScript">
<!--
function window_onLoad(){
//堦僷僢働乕僕偺悢検
var strCartonQty = <%=wResultData.getCartonQty()%>;
if(strCartonQty == null){
divCartonQty.innerText = "";
}
else{
divCartonQty.innerText = addComma(strCartonQty+"");
} // 僒乕僶乕儊僢僙乕僕偺昞帵
var wResultFlag = checkPopupServerMessage(xmlMessage, window.dialogArguments.parent.parent.parent);}// CLOSE儃僞儞墴壓帪
function CallClose()
{
window.close();
}-->
</SCRIPT></HEAD><BODY onLoad="window_onLoad()"><table border="0" CELLPADDING=0 CELLSPACING=0  width="100%">
<tr>
<td>
<!--僿僢僟晹-->
<TABLE CLASS="tblHeader" height="34">
<TR>
<TD height="30"><b><font size="3">Master Information</font></b></TD>
</TR>
</TABLE>
</td>
</tr>
<tr HEIGHT= "5">
<td></td>
</tr>
<!--僨乕僞晹-->
<tr>
<td height="205">
<TABLE BORDER="2" CELLSPACING="0" cellpadding="1" width="100%" height="80%">
  <tr>
<td width="50%" height="20" bgcolor="#CCFFCC" nowrap>
  <b>Country of origin</b>
</td>
<td width="50%" align="right" nowrap><%=ACodePatcher.toHTML(wResultData.getCountry())%><br></td>
  </tr>
  <tr>
<td height="20" bgcolor="#CCFFCC" nowrap>
<b>PR Lead Time</b>
</td>
<td align="right" nowrap><%=ACodePatcher.toHTML(wResultData.getPRLT())%><br></td>
  </tr>
  <tr>
<td height="20" bgcolor="#CCFFCC" nowrap>
<b>Planning Cycle</b>
</td>
<td align="right" nowrap><%=ACodePatcher.toHTML(wResultData.getPlanCycle())%><br></td>
  </tr>
  <tr>
<td height="20" bgcolor="#CCFFCC" nowrap>
<b>Master Carton qty </b></td>
<td align="right" nowrap><SPAN id="divCartonQty"></SPAN><br></td>
  </tr>
  <tr>
<td height="20" bgcolor="#CCFFCC" nowrap>
<b>Initial Ship Week</b>
</td>
<td align="right" nowrap><%=ACodePatcher.toHTML(wResultData.getInitialShipWeek())%><br></td>
  </tr>
  <tr>
<td height="20" bgcolor="#CCFFCC" nowrap>
<b>Final Ship Week</b>
</td>
<td align="right" nowrap><%=ACodePatcher.toHTML(wResultData.getFinalShipWeek())%><br></td>
  </tr>
  <tr>
<td height="20" bgcolor="#CCFFCC" nowrap>
<b>Division Comp.</b></td>
<td align="right" nowrap><%=ACodePatcher.toHTML(wResultData.getDivComp())%><br></td>
  </tr>
  <tr>
<td height="20" bgcolor="#CCFFCC" nowrap>
<b>Import Flag</b></td>
<td align="right" nowrap><%=ACodePatcher.toHTML(wResultData.getImpFlag())%><br></td>
  </tr>
  <tr>
<td height="20" bgcolor="#CCFFCC" nowrap>
<b>SIH Flag</b></td>
<td height="20" align="right" nowrap><%=ACodePatcher.toHTML(wResultData.getSIHFlag())%><br></td>
  </tr>   
  </table>
</td>
  </tr>
<!--僼僢僞晹-->
<tr HEIGHT= "3">
<td></td>
</tr>
<tr HEIGHT="30">
<TD>
<TABLE CLASS="tblFooter">
<TR>
<TD ALIGN="right">
<INPUT TYPE="button" CLASS="btClose" NAME="ButtonClose" VALUE="Close" ONCLICK="CallClose()">
</TD>
</TR>
</TABLE>
</td>
</tr>
</table></BODY>
</HTML>