logic:forward problem

My code is

<logic:notPresent name="catagory" scope="request">
<logic:forward name="cat"/>
</logic:notPresent>

<html-el:select property="category" value="">
<html-el

ption value="0">Select Category</html-el

ption>
<logic

resent name="catagory" scope="request">
<c:forEach var="i" varStatus="status" items="${catagory}">
<html-el

ption value="${i}">${i}</html-el

ption>
</c:forEach>
</logic

resent>
</html-el:select>

lobal forward

<forward name="cat" path="/web/category1.do" />
Action

<action path="/category1"
input="/Buyer/rfqview.jsp"
type="com.manipal.struts.action.Catalogue"/>

Catalogue class

package com.manipal.struts.action;
import com.manipal.struts.DataBase.DBConnect;
import java.util.Hashtable;
import java.util.Vector;
import org.apache.struts.action.*;
import java.sql.*;
import javax.servlet.http.*;

public class Catalogue extends Action
{
Connection con;

public ActionForward execute(ActionMapping mapping,ActionForm form,HttpServletRequest req,HttpServletResponse res) throws Exception
{
Hashtable v=new Hashtable();
ResultSet r;
Statement st;
String path="";
int i=0;
Integer in;
con=DBConnect.getConnectionDB();
String param=req.getParameter("option");
System.out.println(DBConnect.i);
String s="select * from gil_category";
try
{
st=con.createStatement();
r=st.executeQuery(s);
while(r.next())
{
i=r.getInt("CATEGORYID");
in=new Integer(i);
v.put(in,r.getString("CATEGORY"));

}
req.setAttribute("catagory",v);
path="success";
}
catch (SQLException e)
{
System.out.println("Query not executed");
}
if(param.equals("view"))
return mapping.findForward(path);
else
return mapping.getInputForward();

}

}

Error:

SEVERE: ServletException in �WEB-INF/tiles/rfqpost.jsp� : Exception Forwarding for name cat : java.lang.IlligalState Exception : cannot forward after the response has been commiteed.

What this message is telling you is that you have started to write something to the response in your JSP prior to the <logic:forward> tag, and that is not allowed. The <logic:notPresent> block that you have shown us must go at the very beginning of the JSP before writing anything -- even before the <head> block.

I am using tiles.

My files are: postrfq.jsp
<%@ taglib uri="/WEB-INF/struts-tiles.tld"
prefix="tiles" %>
<tiles:insert page="/WEB-INF/tiles/main-layout.jsp">
<tiles

ut name="title" value="Welcome kurlon eprocurement system"/>
<tiles

ut name="header" value="/WEB-INF/tiles/header2.jsp"/>
<tiles

ut name="menu" value="/WEB-INF/tiles/search-menu.jsp"/>
<tiles

ut name="body" value="/WEB-INF/tiles/rfqpost.jsp"/>
<tiles

ut name="footer" value="/WEB-INF/tiles/footer.jsp"/>
</tiles:insert>

mainLayout.jsp

<%@ taglib uri="/WEB-INF/struts-html.tld" prefix="html" %>
<%@ taglib uri="/WEB-INF/struts-tiles.tld" prefix="tiles" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html:html locale="true">
<head>
<html:base />
<title><tiles:getAsString name="title" /></title>
</head>
<body><center>
<table border="0" width="80%" height="100%" cellspacing="5">
<tbody>
<tr><td colspan="2" height="20%" align="center"><tiles:insert attribute="header" /></td></tr>
<tr>
<td width="20%" height="75%" valign="top"><tiles:insert attribute="menu" /></td>
<td width="60%" height="75%" valign="top"><tiles:insert attribute="body" /></td>
</tr>
<tr><td colspan="2" height="5%" align="center"><tiles:insert attribute="footer" /></td></tr>
</tbody>
</table></center>
</body>
</html:html>

rfqpost.jsp

<%@ taglib uri="/WEB-INF/struts-html.tld" prefix="html" %>
<%@ taglib uri="/WEB-INF/struts-html-el.tld" prefix="html-el" %>
<%@ taglib uri="/WEB-INF/struts-bean.tld" prefix="bean" %>
<%@ taglib uri="/WEB-INF/struts-logic.tld" prefix="logic" %>
<%@ taglib uri="c.tld" prefix="c" %>
<%@ page language="java" %>
<%response.setHeader("Cache-Control","no-cache");
response.setHeader("Cache-Control","no-store");
response.setHeader("Location", "login.jsp");
response.setHeader("Pragma", "no-cache");
%>
<html:html>
<logic:notPresent name="id" scope="catagory">
<logic:forward name="cat"/>
</logic:notPresent>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Untitled Document</title>
<script language="javascript" type="text/javascript" src="../javascript/datetimepicker.js"></script>
<script language="javascript" type="text/javascript" src="../javascript/date.js"></script>
<style type="/web/text/css">

</style>

</head>

<body leftmargin="0" topmargin="0" marginwidth="0" marginheight="0">
 
<table width="100%" border="0" align="center" cellpadding="0" cellspacing="0" class="boder">
<tr>
<td height="1003" align="left" valign="top">
 
<html:errors/>
<html:form method="post" action="/postrfq.do" >
<table width="489" border="1" align="center" cellpadding="0" cellspacing="0" bordercolor="#CCCCCC">
<tr>
<td height="34" colspan="2" align="left" valign="middle"><div align="center">RFQ Posting Form</div> <div align="right">* Indicate mandatory fields</div></td>
</tr>
<tr>
<td width="205" height="34" align="left" valign="middle" class="headingsinforms"> Category*</td>
<td width="278">
<% System.out.println("\n\n\nHI\n\n\n\n"); %>

<html-el:select property="category" value="">
<html-el

ption value="0">Select Category</html-el

ption>

</html-el:select>
</td>
</tr>
<tr>
<td height="32" align="left" valign="middle" class="headingsinforms">Subcategory*</td>
<td>
<html:select property="catsubcatid" value="">
<html

ption value="0">Select SubCategory</html

ption>

</html:select>
</td>
</tr>

<tr>
<td height="31" align="left" valign="middle" class="headingsinforms">Product*</td>
<td>
<html:select property="product" value="">
<html

ption value="0">Select Product</html

ption>

</html:select>
</td>
</tr>

<tr>
<td height="30" align="left" valign="middle" class="headingsinforms">Technical
Specification*</td>
<td><html:textarea property="techspec" rows="3"/></td>
</tr>
<tr>
<td height="30" align="left" valign="middle" class="headingsinforms">Product
Description </td>
<td><html:textarea property="description" rows="3"/></td>
</tr>
<tr>
<td height="28" align="left" valign="middle" class="headingsinforms">Delivery
Destination*</td>
<td>

<html:select property="location" >
<html

ption value="0">Select One</html

ption>

</html:select>

</td>
</tr>
<tr>
<td height="28" align="left" valign="middle" class="headingsinforms">Quality</td>
<td><html:textarea property="quality" rows="3"/> </td>
</tr>
<tr>
<td height="28" align="left" valign="middle" class="headingsinforms"> Mode of
Shipment* </td>
<td>
<html:select property="shipmentmode" >
<html

ption value="selected">Select Shipment</html

ption>
<html

ption value="Air">Air</html

ption>
<html

ption value="Sea">Sea</html

ption>
<html

ption value="Surface Road">Surface Road</html

ption>
<html

ption value="Surface Rail">Surface Rail</html

ption>
</html:select>
</td>
</tr>

<tr>
<td height="26" align="left" valign="middle" class="headingsinforms">Package
Details*</td>
<td><html:textarea property="packagedet" rows="3"/></td>
</tr>
<tr>
<td height="27" align="left" valign="middle" class="headingsinforms">Photograph</td>
<td><html:textarea property="photo1" rows="3"/></td>
</tr>
<tr>
<td height="30" align="left" valign="middle" class="headingsinforms">Remarks</td>
<td><html:textarea property="remark1" rows="3"/></td>
</tr>
<tr>
<td height="27" align="left" valign="middle" class="headingsinforms">Photograph</td>
<td><html:file property="photo2" size="20"/></td>
</tr>
<tr>
<td height="29" align="left" valign="middle" class="headingsinforms">Remarks</td>
<td><html:textarea property="remark2" rows="3"/></td>
</tr>
<tr>
<td height="31" align="left" valign="middle" class="headingsinforms">Target
Price*</td>
<td><html:text property="expprice" size="20"/>
<html:select property="exppricetype" value="">
<html

ption value="0">Select Target </html

ption>

</html:select>
</td>
</tr>

<tr>
<td height="61" align="left" valign="middle" class="headingsinforms">Delivery
Terms*</td>
<td><html:radio property="price_term" value="FDF" >
Free Delivery
to Factory</html:radio> 
<html:radio property="price_term" value="EYW">
Ex-Your-Works</html:radio></td>
</tr>
<tr>
<td height="61" align="left" valign="middle" class="headingsinforms">Payment
Terms*</td>
<td><html:textarea property="paymentterm" rows="3"/></td>
</tr>

<tr>
<td height="59" align="left" valign="middle" class="headingsinforms">End date
for Submission of Qtn </td>
<td><html:text property="enddate" size="30" maxlength="10" readonly="readonly" value=""/>
<a href="javascript:NewCal('date','ddmmyyyy')"><img src="../images/cal.gif" width="16" height="16" border="0" alt="Pick a date"></a></td>
</tr>
</table>
 
 
<img src="../forms/supplier_files/mb.gif" width="1" height="16">
<table width="200" border="0" align="center" cellpadding="0" cellspacing="0">
<tr> <td>
<input type="hidden" name="newaccount" value="second">
<html:submit property="submit1" value="Next>>"/></td>
<td><html:reset property="Submit2" value="Reset"/></td>
</tr>
</table>
 
</td>
</tr>
</table>
</html:form>
</body>
</html:html>

I am getting the same error.pliz help me.

I'm afraid you simply can't do what you're trying to do in this way.

Tiles takes several page fragments and of those fragments, generates a single http page to send back to the browser. The principle behind a redirect is that you decide "up front" that this is not the page you should be displaying, but some other page. If you try to do this inside a tile (which, remember is a page fragment) you have already tried to send part of your response to the browser. You can't change your mind in mid-stream.

I haven't used tiles a lot, so don't know all the tricks, but here is something I think would work:

Put the following code in your postrfq.jsp:

and remove the <logic:notPresent> block from rfqpost.jsp.