JSP can't "see" bean properties

I am trying to populate my JSP form inputs using a bean. I know the bean properties are being set, but for some reason they are not being passed to my form inputs. The bean properties are being set by a worker class just prior to hitting the JSP that segment follows. I think I may have a scope problem. Any help/thoughts would be greatly appreciated.
<HTML>
<HEAD>
<TITLE></TITLE>
<jsp:useBean id="codin" class="edu.cod.CodIn" scope="application" />
</HEAD>
<BODY>
<form action='codapp' method='post'>
<input type='hidden' name='postedFrom' value='studentInsert'>
<br>
student id: <input type='text' name='student_id' size='5' maxlength='5' value='<%= codin.getStudent_id() %>'>
<br>
last name: <input type='text' size='18' name='last_name' value="<%= codin.getLast_name() %>">
<br>
first name: <input type='text' size='16' name='first_name' value="<%= codin.getFirst_name() %>">
~
~
~
~
~
<br>
<input type='submit' value='submit'>
</form>
</BODY>
</HTML>

Here is a cod segment from my servlet. In it I am instantiating the bean, then setting the bean properties. If the bean is successfully populated, the gotoPage method returns to the studentInsert.jsp page. I would like to carry the name and ID fields back to the JSP so that the user doesn't have to re-key these fields to enter additional hours for the same individual. I am fairly certain the scope would only need to be request, however I'm sure how it's done.
if ( postOperation.equals("studentInsert") )
CodInsert codin = new CodInsert();
codin.setStudent_id(request.getParameter("student_id"));
codin.setFirst_name(request.getParameter("first_name"));
codin.setLast_name(request.getParameter("last_name"));
codin.setAi_code(request.getParameter("ai_code"));
codin.setAi_date(request.getParameter("ai_date"));
boolean successfulInsert = codin.doTheInsert();
if (successfulInsert) {
gotoPage("studentInsert.jsp",request, response);
else {
gotoPage("errorPage.jsp",request, response);
private void gotoPage(String url,
HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException
RequestDispatcher dispatcher =
getServletContext().getRequestDispatcher(url);
dispatcher.forward(request,response);
This is my useBean tag from the studentInsert.jsp:
<jsp:useBean id="codin" class="edu.cod.CodInsert" scope="request" />

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JSP can't find bean class!!!!!

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Hi,
I am having a similar problem. I was wondering if you found a solution. The error I get is listed below. I have my jsp file at ../webapps/ROOT/myapp/web and my bean file located at ../webapps/ROOT/myapp//src.
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HTTP Status 500 -
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
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^
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^
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^
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You can implement your own reset option (one methode that goes though and manually sets everything back to its original state) or you can dispose of the bean and create a new one.

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          Prasad Peddada <[email protected]> wrote:
          >David,
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Can't Create Bean Error

I modified the numguess example that comes with tomcat but I get a "can't create bean" error message when I call my jsp file. If anyone can see what I'm doing wrong or suggest ways to discover the problem I'd appreciate it.
My modified jsp:

<%@ page import = "num.NumberGuessBean" %>
<jsp:useBean id="numguess" class="num.NumberGuessBean" scope="session"/>
<jsp:setProperty name="numguess" property="*"/>
<html>
<head><title>Number Guess</title></head>
<body bgcolor="white">
<font size=4>
<% if (numguess.getSuccess()) { %>
Congratulations! You got it.
And after just <%= numguess.getNumGuesses() %> tries.<p>
<% numguess.reset(); %>
Care to try again?
<% } else if (numguess.getNumGuesses() == 0) { %>
Welcome to the Number Guess game.<p>
Play with default limits ( a number between 0 and 100)<p>
or enter upper and lower limits.<p>
<form method=get>
Play with defaults?: <input type=radio name=default value="yes">Yes
<input type=radio name=default value="no">No
<\form>
<% if (numguess.getRadio().equals("no")) { %>
<form method=get>
Enter upper limit:<input type=text name=upperLimit>
Enter lower limit:<input type=text name=lowerLimit>
<\form>
<% numguess.reset(); %>
<% } %>
<form method=get>
What's your guess? <input type=text name=guess>
<input type=submit value="Submit">
</form>
<% } else { %>
Good guess, but nope. Try <b><%= numguess.getHint() %></b>.
You have made <%= numguess.getNumGuesses() %> guesses.<p>
I'm thinking of a number between <jsp:getProperty name="numguess" property="lowerLimit"/> and <jsp:getProperty name="numguess" property="upperLimit"/>.<p>
<form method=get>
What's your guess? <input type=text name=guess>
<input type=submit value="Submit">
</form>
<% } %>
</font>
</body>
</html>
and the modified bean:
* ====================================================================
* The Apache Software License, Version 1.1
* Copyright (c) 1999 The Apache Software Foundation. All rights
* reserved.
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. The end-user documentation included with the redistribution, if
* any, must include the following acknowlegement:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
* 4. The names "The Jakarta Project", "Tomcat", and "Apache Software
* Foundation" must not be used to endorse or promote products derived
* from this software without prior written permission. For written
* permission, please contact [email protected].
* 5. Products derived from this software may not be called "Apache"
* nor may "Apache" appear in their names without prior written
* permission of the Apache Group.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
* Originally written by Jason Hunter, http://www.servlets.com.
package num;
import java.util.*;
public class NumberGuessBean {
int answer;
boolean success;
String hint;
int numGuesses;
String radiochoice;
int lowerLimit=0;
int upperLimit=100;
String error;
public NumberGuessBean() {
reset();
public void setGuess(String guess) {
numGuesses++;
int g;
try {
g = Integer.parseInt(guess);
catch (NumberFormatException e) {
g = -1;
if (g == answer) {
success = true;
else if (g == -1) {
hint = "a number next time";
else if (g < answer) {
hint = "higher";
else if (g > answer) {
hint = "lower";
public void setRadio(String s) {
     radiochoice=s;
public String getRadio() {
     return radiochoice;
public void setLowerLimit( int lowerLimit) {
     this.lowerLimit=lowerLimit;
public int getLowerLimit() {
     return lowerLimit;
public void setUpperLimit(int upperLimit) {
     this.upperLimit=upperLimit;
public int getUpperLimit() {
     return upperLimit;
public boolean getSuccess() {
return success;
public String getHint() {
return "" + hint;
public String getError() {
     return ""+error;
public int getNumGuesses() {
return numGuesses;
public void reset() {
     if (getRadio().equals("yes")) {
          answer = (int)(Math.random()*100);
     else {
          int i;
          i=(int)(Math.random()*upperLimit);
          if (i<lowerLimit) {
               i=i+lowerLimit;
          answer=i;
     success = false;
numGuesses = 0;

implement synchronizable and createa constructor, then check it once again.

How to update bean properties when using an immediate link

Hello,
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