JSP using JavaBeans

Hello
Does anyone know of any examples i can look at for using JSP's with JavaBeans.
Thanks
Jazci

Look here:
http://java.sun.com/j2ee/tutorial/1_3-fcs/doc/JSPBeans.html#62069

Similar Messages

The deployment problem in JSP using JavaBean

Hi there,
I followed the descriptions in Writing Enterprise Applications with
Java 2 SDK, Enterprise Edition tutorial to build a set of programs to run JSP with JavaBean, and I also followed the steps in creating new WAR file, but some how it wouldn't work after I deployed them. I run the JSP in IE and got a message like this:
org.apache.jasper.JasperException: Unable to compile class for JSP
An error occurred at line: 20 in the jsp file: /1bonus.jsp
Generated servlet error:
c:\j2sdkee1.3.1\repository\orbit\web\JSPRoot\$1bonus$jsp.java:63: Class org.apache.jsp.JBonusBean not found.
JBonusBean jbonus = null;
^
I used the deploytool to create the WAR file, and after I added the 1bonus.jsp, I also added JBonusBean into the WAR file. I found 1bonus.jsp was added into the WAR file, but there's no JBonusBean appeared under the WAR file.
Could you please tell me is there anything wrong?
Thanks for your time.
Regards,
Eric

I think you have not imported 'BonusBean' in your jsp. Code this line in your jsp at the top.
<%@page import="BonusBean" %>
Sudha

Two JSPs using JavaBeans

Hi,
I have a JSPs and JavaBeans question.
There are two JSP files. One.jsp and Two.jsp.
One.jsp include code that use the JavaBeans from Two.jsp:
<%
     if (bl.getDmlOperation() == NcepConstants.UPDATE) {
Two.jsp have:
<jsp:useBean      id="bl"     class="TestsPrivateBean" scope="session"/>
<%@ include file="One.jsp" %>
When I run this code in TOMCAT, it can run in runtime with no problem.
But the company it now moving to use an IDE (Oracle JDeveloper 9i) with require me to build this into one project. When I try to build the project, it shows error in One.jsp as "variable bl not found in class_One".
When I put the <jsp:useBean      id="bl"     class="TestsPrivateBean" scope="session"/> code into Two.jsp, it shows "duplicate found error".
How should I do to fix this?
Thanks
Kenny

It sounds like it's compiling One.jsp independant of Two.jsp, which will cause the first error. Try renaming One.jsp to One.inc or something. That way it doesn't try compiling One.jsp at all (it won't be there).

How to run jsp using javabean class in tomcat

hello all,
i have bean class placed in classes folder of tomcat and placed jsp and html in root directory. i am not able to run it , if i have do any setting in web.xml, pls let me know from u

No XML required, but you must put the class into a package.
Packages are folders with some files that identify whats in them, so you will end up with something like
yourWebbApp/classes/yourPackage/yourClass

Using javabean problem

Hi all,
I need to call function in java program in jsp , i use it as javabean but i found one function does not work, I think it may be because that functions related to the other class, though i have put them inside the right folder. what i would like to know is can the function be called in jsp using javabean if the function involve other class? thanks!!

Hi You can call that function using
<jsp:useBean id="beanInstanceName" class="package.class"/>
<jsp:setProperty name="beanInstanceName" property="*"/> // for setting the all attribute os the javabean class.
for gettiing the function of getting the value of attribute.
<jsp:getProperty name="beanInstanceName" property="propertyName"/>
or
call with the
<jsp:useBean id="beanInstanceName" class="package.class"/>
<%=beanInstanceName.getMthodName%> within ur Jsp.
Try this.
Thanks
Vivek

Using JavaBeans in a JSP Page

I wan't to know the advantages and disadvantages of using JavaBeans in a JSP page.
Like for example general traditional approach for a database connection
is to create a connection and access the database from that and close the connection
at the end of the page, instead of the If I use a common connection bean for making connections,
is that suggestable and then when should i close the connection then.
One good application of JavaBeans is using a Set and Get methods for form fields in
a registration form to get back the values.
So may i know how best can we use the JavaBeans other than this application.
ThanX in advance,
kiran
[email protected]

I believe putting processing and query code in the JavaBean was one of the reasons for putting JavaBeans support in JSP in the first place. The original idea was to use the setXXX methods to populate the bean's data from the posted form, then do the processing (or database query), then use the getXXX methods to display the bean's data.
Efficiency-wise, it's exactly the same as putting all the code in-line in the JSP page (actually, it might be a bit slower, because of the reflection required to do it.) Code-wise though, it makes the JSP easier to read.
Of course, we have EJBs now too, which tie very closely and can match database queries almost one-to-one, one way to incorporate these is inside the JavaBean you reference from the JSP, another way from a servlet you redirect the JSP to, etc...

Urgent!!!!!How can i use javamail in jsp without using javabeans

hello friend
I m making a forum in which i want to send response to the user through mail I m not using javabean Can anyone help me.How to use javamail in jsp

http://java.sun.com/developer/onlineTraining/JavaMail/exercises.html

Getting error while passing implicit request object from JSP to JavaBean

Hi,
I am getting error while passing implicit object ie( request object)
from within JSP to JavaBean.
Following is source for JSP, JavaBean and Error message I am getting.
vaLookup.jsp Source
<jsp:useBean id="db" class="advisorinsight.javabeans.DisplayPages"
scope="request">
<jsp:setProperty name="db" property="request" value="<%= request %>"
/>
</jsp:useBean>
<jsp:getProperty name="db" property="totalrecords" />
JAVABEAN DisplayPages.java source
package javabeans;
import java.io.Serializable;
import javax.servlet.http.HttpServletRequest;
public final class DisplayPages implements Serializable {
private String totalrecords;
private HttpServletRequest request;
public void setRequest(HttpServletRequest req){
this.request = req;
public java.lang.String getTotalrecords()
this.totalrecords =
this.request.getParameter("totalrecords");
return this.totalrecords;
public DisplayPages(){
totalrecords = "";
request = null;
error after executing vaLookup.jsp
[30/Nov/2001 11:56:04:5] info: EXTMGR-006: GXExtensionManager: Extension
service JavaExtData successfully loaded
[30/Nov/2001 11:56:04:5] info: EXTMGR-006: GXExtensionManager: Extension
service LockManager successfully loaded
[30/Nov/2001 11:56:04:5] info: EXTMGR-006: GXExtensionManager: Extension
service RLOPManager successfully loaded
[30/Nov/2001 11:56:04:5] info: REQ-012: thread add
[30/Nov/2001 11:56:04:5] info: REQ-012: thread add
[30/Nov/2001 11:56:04:5] info: REQ-012: thread add
[30/Nov/2001 11:56:04:5] info: REQ-012: thread add
[30/Nov/2001 11:56:04:5] info: REQ-012: thread add
[30/Nov/2001 11:56:04:5] info: REQ-012: thread add
[30/Nov/2001 11:56:04:5] info: REQ-012: thread add
[30/Nov/2001 11:56:04:5] info: REQ-012: thread add
[30/Nov/2001 11:56:04:7] info: ENGINE-ready: ready: 10819
[30/Nov/2001 11:56:46:0] info: --------------------------------------
[30/Nov/2001 11:56:46:0] info: JSPRunnerSticky: init
[30/Nov/2001 11:56:46:0] info: --------------------------------------
[30/Nov/2001 11:56:51:7] error: Exception: SERVLET-compile_failed:
Failed in compiling template: /va/valookup.jsp, javac error:
c:\iplanet\ias6\ias\APPS\variabl
S\va\valookup.java:76: Undefined variable: JSP_8
db.setRequest(_JSP__8);
^
1 error
Exception Stack Trace:
java.lang.Exception: javac error:
c:\iplanet\ias6\ias\APPS\variableannuity\va\WEB-INF\compiled_jsp\jsp\APPS\va\valookup.java:76:
Undefined variable: JSP_8
db.setRequest(_JSP__8);
^
1 error
at
com.netscape.server.servlet.jsp.JSPCompiler.compileJSP(Unknown Source)
at
com.netscape.server.servlet.jsp.JSPCompiler.compileOrLoadJSP(Unknown
Source)
at
com.netscape.server.servlet.jsp.JSPCompiler.compileInstance(Unknown
Source)
at
com.netscape.server.servlet.jsp.JSPCompiler.compileInstance(Unknown
Source)
at
com.netscape.server.servlet.platformhttp.PlatformHttpServletResponse.callJspCompiler(Unknown
Source)
at
com.netscape.server.servlet.platformhttp.PlatformHttpServletResponse.callUri(Unknown
Source)
at
com.netscape.server.servlet.platformhttp.PlatformHttpServletResponse.callUriRestrictOutput(Unknown
Source)
at
com.netscape.server.servlet.platformhttp.PlatformRequestDispatcher.forward(Unknown
Source)
at com.netscape.server.servlet.jsp.JSPRunner.service(Unknown
Source)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:865)
at
com.netscape.server.servlet.servletrunner.ServletInfo.service(Unknown
Source)
at
com.netscape.server.servlet.servletrunner.ServletRunner.execute(Unknown
Source)
at com.kivasoft.applogic.AppLogic.execute(Unknown Source)
at com.kivasoft.applogic.AppLogic.execute(Unknown Source)
at com.kivasoft.thread.ThreadBasic.run(Native Method)
at java.lang.Thread.run(Thread.java:479)

The only thing that I see that looks funny to me is when you pass the request object into the method using <%=request%>, Im not sure whats going to happen here because that is suppose to print the results. Have you tried simply using <%request%>?

Jsp and JavaBean problem

Hi All,
I need UR help
Problem:
I have a javaBean and a jsp page say test.class and test.jsp respectively.
Now the problem is when i run my jsp in web browser with path
http://localhost:8080/mypackage/test.jsp and use test.class in it. It give me an error Class test.class Not Found but when i give the path http://localhost:8080/examples/jsp/parentpackage/mypackage/test.jsp
it works fine.
I am using Tomcat 3.2 and i have already made changes in server.xml for my jsp files thats why i can run my programs with the earlier path but dont know why its giving the error when i use javabean,
Also i have put my javabean class in---parentpackage/mypackage/test.class
Thanks
Amit

hi there,
Thanks for you time, here i have placed the source for jsp and javabean
Please excuse me if you find the code unproper
Code for JSP:
<%
response.setHeader("Pragma","No-cache");
response.setDateHeader("Expires",0);
response.setHeader("Cache-control","No-cache");
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>Internal Clarification-Agent View</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
</head>
<body background="images/c.jpg" bgproperties="fixed">
<%@ page language="java" import="java.sql.*" %>
<%@ page import="javax.servlet.*" %>
<%@ page import="java.io.*" %>
<%@ page import="java.util.*" session="true"%>
<%@ page import="java.util.Date" %>
<%@ page import="java.sql.Timestamp" %>
<%@ page import="java.text.*" %>
<%@ page import="java.lang.*" %>
<%@ page import="javax.servlet.http.*"%>
<jsp:useBean id="navi" class="arvato.interclarification.rqchunk" scope="session" />
<%
try{
Connection con = null;
PreparedStatement ps = null;
PreparedStatement ps1 = null;
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
con = DriverManager.getConnection("jdbc:odbc:interdsn","","");
String qrno = request.getParameter("qrno");
String rdb = request.getParameter("rb");
String key = request.getParameter("key");
String cname = request.getParameter("cname");
//out.print(key);
//if(st.equals("All")){
String sql="";
if(rdb!=null){
if(rdb.equals("1")){
if(qrno==null||qrno.equals("")){
sql = "SELECT * FROM crequired ORDER BY adate DESC";
else if(qrno!=null){
sql = "SELECT * FROM crequired WHERE queryno LIKE '"+qrno+"%'";
}else if(rdb.equals("2")){
if(key==null||key.equals("")){
sql = "SELECT * FROM crequired ORDER BY adate DESC";
else if(key!=null){
sql = "SELECT * FROM crequired WHERE clarification LIKE '"+key+"%'";
else if(rdb.equals("3")){
if(cname==null||cname.equals("")){
sql = "SELECT * FROM crequired ORDER BY adate DESC";
else if(cname!=null){
sql = "SELECT * FROM crequired WHERE fname LIKE '"+cname+"%'";
if(rdb==null)
sql = "SELECT * FROM crequired ORDER BY adate DESC";
ps = con.prepareStatement(sql,ResultSet.TYPE_SCROLL_INSENSITIVE,ResultSet.CONCUR_READ_ONLY);
//ps.setString(1,space);
/*}else{
sql = "SELECT * FROM crequired WHERE status=? AND space=?";
ps = con.prepareStatement(sql);
ps.setString(1,st);
ps.setString(2,space);
ResultSet rs = ps.executeQuery();
%>
<table width="100%" border="0" cellspacing="0">
<tr>
<td width="50%"><strong><img src="images/microsoftlogo1.jpg" width="288" height="94"></strong></td>
<td width="50%"><div align="right"><strong><img src="images/logo2.jpg" width="177" height="77"></strong></div></td>
</tr>
</table><br>
<hr noshade color="#000000">
<div align="center"><font color="#990000" size="4" face="Verdana, Arial, Helvetica, sans-serif"><strong>CSR
VIEW</strong></font>
</div>
<form name="form" method="post" action="agentview1.jsp">
<table width="59%" border="1" align="center" cellpadding="2" cellspacing="0">
<tr>
<td width="49%"><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><strong>
<input name="rb" type="radio" value="1" <%if(rdb!=null){if(rdb.equals("1")){out.print("checked");}}%>>
<font size="1">SEARCH BY QUERY NUMBER:</font></strong></font></td>
<td width="51%"><input name="qrno" type="text" id="qrno"></td>
</tr>
<tr>
<td><strong><font size="2" face="Verdana, Arial, Helvetica, sans-serif">
<input type="radio" name="rb" value="2" <%if(rdb!=null){if(rdb.equals("2")){out.print("checked");}}%>>
<font size="1"> SEARCH BY KEY WORD:</font></font></strong></td>
<td><input name="key" type="text" id="key"></td>
</tr>
<tr>
<td><input type="radio" name="rb" value="3" <%if(rdb!=null){if(rdb.equals("3")){out.print("checked");}}%>>
<strong><font size="1" face="Verdana, Arial, Helvetica, sans-serif">SEARCH
BY CSR NAME:</font></strong></td>
<td><input name="cname" type="text" id="cname"></td>
</tr>
<tr>
<td colspan="2"><div align="center">
<input type="submit" name="Submit" value="Submit">
</div></td>
</tr>
</table>
</form><br>
Back
<%
navi.setchunk(10);
navi.setRS(rs);
String v="";
String vv=request.getParameter("off");
if(vv==null){v="1";}
else{
v=vv;
int i=Integer.parseInt(v);
navi.setcursor(i);
ResultSet rs2=navi.getRS();
int h1=1;
if(request.getParameter("off")!=null) h1=Integer.parseInt(request.getParameter("off"));
int h2= navi.getchunk();
int h3= navi.getcount();
int offset=(h3-h1)<h2?h3:(h1+h2-1);
%>
<table width=100%><tr><td width=33%> </td><td align=center width=34%><font face="verdana, arial" size=2 color=#000000>Displaying <%=h1%> to <%=offset%> of <font size=4><%=h3 %></font></font></td><td width=33%> </td></tr></table>
<%
int c1=navi.getcount(),c2=navi.getchunk();
int c3=navi.getcursor();
int c4=c3+c2;
int c5=c3-c2;
%>
<table width=100% ><tr><td align=left width=100% >
<%
if(c3>c2 && c3<=c1){
out.print("<a href=\"agentview1.jsp?n=y&off="+c5+"\">Previous</a>");
%></td><td align=right width=100%>
<%
if(c1>c2 && (c1-c3)>=c2){
out.print("<a href=\"agentview1.jsp?n=y&off="+c4+"\">Next</a>");}
%>
</td></tr></table>
<table width="1359" border="0" cellspacing="1">
<tr bgcolor="#3C6C84">
<th width="2%"><font color="#FFFFFF" size="1" face="Verdana, Arial, Helvetica, sans-serif">S.No.</font></th>
     <th width="5%"><font color="#FFFFFF" size="1" face="Verdana, Arial, Helvetica, sans-serif">Query No</font></th>
<th width="5%"><font color="#FFFFFF" size="1" face="Verdana, Arial, Helvetica, sans-serif">Clarification
Posting Date & Time</font></th>
     <th width="3%"><font color="#FFFFFF" size="1" face="Verdana, Arial, Helvetica, sans-serif">Posted
By</font></th>
<th width="6%"><font color="#FFFFFF" size="1" face="Verdana, Arial, Helvetica, sans-serif">Received
By</font></th>
<th width="3%"><font color="#FFFFFF" size="1" face="Verdana, Arial, Helvetica, sans-serif">Sub
Process </font></th>
     <th width="4%"><font color="#FFFFFF" size="1" face="Verdana, Arial, Helvetica, sans-serif">Region</font></th>
<th width="5%"><font color="#FFFFFF" size="1" face="Verdana, Arial, Helvetica, sans-serif">Status</font></th>
<th width="15%"><font color="#FFFFFF" size="1" face="Verdana, Arial, Helvetica, sans-serif">Clarification
Required OnQuery </font></th>
<th width="18%"><font color="#FFFFFF" size="1" face="Verdana, Arial, Helvetica, sans-serif">Solution</font></th>
<th width="8%"><font color="#FFFFFF" size="1" face="Verdana, Arial, Helvetica, sans-serif">Date
& Time Visited On</font></th>
<th width="7%"><font color="#FFFFFF" size="1" face="Verdana, Arial, Helvetica, sans-serif">Date
& Time Closed On</font></th>
<th width="5%"><font color="#FFFFFF" size="1" face="Verdana, Arial, Helvetica, sans-serif">Remarks</font></th>
</tr>
<%
int m = 0;
for(int l=0;l<c2 && i<=c1;l++,i++){
//while(rs.next()){
m = m+1;
String queryno = rs.getString("queryno");
//out.print(queryno);
%>
<tr>
<td bgcolor="#FFFFCC"><font face="Verdana, Arial, Helvetica, sans-serif" size="1"><b><%=m%></b></font></td>
     <td width="5%" bgcolor="#FFE4CA"><font face="Verdana, Arial, Helvetica, sans-serif" size="1"><b><%=queryno%></b></font></td>
<td bgcolor="#FFFFCC"><font face="Verdana, Arial, Helvetica, sans-serif" size="1">
<%Date d1 = rs.getDate("adate");
     String dd1="";
     SimpleDateFormat sddf = new SimpleDateFormat("MM/dd/yyyy");
     dd1 = sddf.format(d1);
     Date t1 = rs.getTime("atime");
     String tt1="";
     SimpleDateFormat stdf = new SimpleDateFormat("HH:mm");
     tt1 = stdf.format(t1);
     String ttm = dd1+" "+tt1;
     out.print(ttm);
     %></font>
</td>
     <td bgcolor="#FFE4CA"><font face="Verdana, Arial, Helvetica, sans-serif" size="1">
<b><%String fnm = rs.getString("fname");
String lnm = rs.getString("lname");
String nm = fnm+" "+lnm;
out.print(nm);
%></b></font></td>
<td width="6%" bgcolor="#FFFFCC"><font face="Verdana, Arial, Helvetica, sans-serif" size="1"><%
     String tnm = rs.getString("tname");
     if(tnm.equals("null")||tnm.equals("-")){}else{out.print(tnm);}
     %></font></td>
     <td bgcolor="#FFE4CA"><font face="Verdana, Arial, Helvetica, sans-serif" size="1"><b><%=rs.getString("space")%></b></font></td>
     <td bgcolor="#FFFFCC"><font face="Verdana, Arial, Helvetica, sans-serif" size="1"><b><%String rg = rs.getString("region");
     if(rg==null||rg.equals("null")){}else{out.print(rg);}%></b></font></td>
     <%String status = rs.getString("status");
     if(status.equalsIgnoreCase("New")){%><td bgcolor="#FF0000"><font face="Verdana, Arial, Helvetica, sans-serif" size="1" color="#FFFFFF"><b><%=status%></b></font></td>
     <%}else if(status.equalsIgnoreCase("Open")||status.equalsIgnoreCase("Awaiting MS Reply")){%><td bgcolor="#FFCC33"><font face="Verdana, Arial, Helvetica, sans-serif" size="1" color="#FFFFFF"><b><%=status%></b></font></td><%}else{%><td bgcolor="#00CC00"><font face="Verdana, Arial, Helvetica, sans-serif" size="1" color="#FFFFFF"><b><%=status%></b></font></td><%}%>
<td bgcolor="#FFE4CA"><font face="Verdana, Arial, Helvetica, sans-serif" size="1" color="#0000CC"><%=rs.getString("clarification")%></font></td>
     <%
//String queryno = rs.getString("queryno");
String qry1 = "select * from csolution where queryno=?";
ps1 = con.prepareStatement(qry1);
ps1.setString(1,queryno);
ResultSet rs1 = ps1.executeQuery();
while(rs1.next()){%>
<td bgcolor="#FFFFCC"><font face="Verdana, Arial, Helvetica, sans-serif" size="1"><%=rs1.getString("solution")%></font></td>
     <td bgcolor="#FFE4CA"><font face="Verdana, Arial, Helvetica, sans-serif" size="1"><%
     Date dp = rs1.getDate("dateofopen");
     String dp1="";
     SimpleDateFormat spdf = new SimpleDateFormat("MM/dd/yyyy");
     dp1 = spdf.format(dp);
     Date tp = rs1.getTime("timeofopen");
     String tp1="";
     SimpleDateFormat stpf = new SimpleDateFormat("HH:mm");
     tp1 = stpf.format(tp);
     String tpm = dp1+" "+tp1;
     out.print(tpm);
     %></font>
</td>
     <td width="5%" bgcolor="#FFFFCC"><font face="Verdana, Arial, Helvetica, sans-serif" size="1"><%
     Date dc = rs1.getDate("dateofclose");
     String dc1="";
     SimpleDateFormat scdf = new SimpleDateFormat("MM/dd/yyyy");
     dc1 = scdf.format(dc);
     Date tc = rs1.getTime("timeofclose");
     String tc1="";
     SimpleDateFormat stcf = new SimpleDateFormat("HH:mm");
     tc1 = stcf.format(tc);
     String tcm = dc1+" "+tc1;
     out.print(tcm);
     %></font>
</td>
     <td width="16%" bgcolor="#FFE4CA"><font face="Verdana, Arial, Helvetica, sans-serif" size="1"><%String remarks = rs1.getString("remarks");
     if(remarks==null){}else{out.print(remarks);}
     %></font></td>
<%}navi.setcursor();
}con.close();}catch(Exception e){out.print(e);}%>
</tr>
</table><br>
<font size="2" face="Verdana, Arial, Helvetica, sans-serif">Back to
Main Menu</font>
</body>
</html>
Code for javaBean:
package arvato.interclarification;
import javax.servlet.http.*;
import java.sql.*;
public class rqchunk
          ResultSet rs=null;
          int chunk=5;
          int count=0;
          int cursor=1;
          public rqchunk(){}
          public void setRS(ResultSet rset) throws SQLException
               rs = rset;
               int cnt=0;
               while(rs.next())
                    cnt++;
               rs.absolute(1);
               count=cnt;
          public void setcursor()throws SQLException
               cursor++;
               rs.absolute(cursor);
          public void setcursor(int i)throws SQLException
               cursor=i;
               rs.absolute(cursor);
          public int getcursor()
               return cursor;
          public int getchunk()
               return chunk;
          public void setchunk(int i)
               chunk=i;
          public void setcount(int j)
               count=j;
          public int getcount()
               return count;
          public ResultSet getRS()
               return rs;
          public void clearRS()
               cursor=0;
               rs=null;
Please excuse me if my codes are not understandable enough
Thanks
Amit

Cannot pass parameters from action class to jsp using arraylist

hi all,
Im using datasource for jdbc connection.now i want to pass the selected values in action class from database to a jsp page.I want to use arraylist.But im not familar with arraylist.can anybody help .plzzzzzzzzzzz

You can use plain javabeans to transfer the data. Check out the jsp:usebean tag. If you don't know how to do, check out the Java EE tutorial: http://java.sun.com/javaee/5/docs/tutorial/doc/ Using javabeans in JSP pages starts halfway chapter 4.

Using javabean in tomcat(unable to compile class)

Hello, I am using jakarta-tomcat-5.0.28, OS:WinXP
I am getting the following error when i use javabean in tomcat (the example is executed just fine in another web server:Blazix)
I am very new to this (JSP, Servlets and tomcat) so any help would be greatly appreciate.
THE ERROR IS:
==============================================================
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException: Unable to compile class for JSP
An error occurred at line: 1 in the jsp file: /SaveName.jsp
Generated servlet error:
C:\Programs\internet\jakarta-tomcat-5.0.28\work\Catalina\localhost\JSPSession\org\apache\jsp\SaveName_jsp.java:42: cannot resolve symbol
symbol : class UserData
location: class org.apache.jsp.SaveName_jsp
UserData user = null;
^
An error occurred at line: 1 in the jsp file: /SaveName.jsp
Generated servlet error:
C:\Programs\internet\jakarta-tomcat-5.0.28\work\Catalina\localhost\JSPSession\org\apache\jsp\SaveName_jsp.java:44: cannot resolve symbol
symbol : class UserData
location: class org.apache.jsp.SaveName_jsp
user = (UserData) jspxpage_context.getAttribute("user", PageContext.SESSION_SCOPE);
^
An error occurred at line: 1 in the jsp file: /SaveName.jsp
Generated servlet error:
C:\Programs\internet\jakarta-tomcat-5.0.28\work\Catalina\localhost\JSPSession\org\apache\jsp\SaveName_jsp.java:46: cannot resolve symbol
symbol : class UserData
location: class org.apache.jsp.SaveName_jsp
user = new UserData();
^
3 errors
     org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:84)
     org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:332)
     org.apache.jasper.compiler.Compiler.generateClass(Compiler.java:412)
     org.apache.jasper.compiler.Compiler.compile(Compiler.java:472)
     org.apache.jasper.compiler.Compiler.compile(Compiler.java:451)
     org.apache.jasper.compiler.Compiler.compile(Compiler.java:439)
     org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:511)
     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:295)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
note The full stack trace of the root cause is available in the Apache Tomcat/5.0.28 logs.
===============================================================
ERROR END
I use the folowing files:
GetName.html
SaveName.jsp
NextPage.jsp
UserData.java
My Dir Structure is:
/JSPSession
    GetName.html
     SaveName.jsp
     NextPage.jsp
   /WEB-INF
      /classes
         UserData.java
         UserData.class
   /libThe Code for the files is:
GetName.html
<HTML>
<BODY>
<FORM METHOD=POST ACTION="SaveName.jsp">
What's your name? <INPUT TYPE=TEXT NAME=username SIZE=20><BR>
What's your e-mail address? <INPUT TYPE=TEXT NAME=email SIZE=20><BR>
What's your age? <INPUT TYPE=TEXT NAME=age SIZE=4>
<P><INPUT TYPE=SUBMIT>
</FORM>
</BODY>
</HTML>---------------------------------------------------------------------------------------------------
SaveName.jsp
<jsp:useBean id="user" class="UserData" scope="session"/>
<jsp:setProperty name="user" property="*"/>
<HTML>
<BODY>
<A HREF="NextPage.jsp">Continue</A>
</BODY>
</HTML>-----------------------------------------------------------------------------------------------------
NextPage.jsp
<jsp:useBean id="user" class="UserData" scope="session"/>
<HTML>
<BODY>
You entered<BR>
Name: <%= user.getUsername() %><BR>
Email: <%= user.getEmail() %><BR>
Age: <%= user.getAge() %><BR>
</BODY>
</HTML>------------------------------------------------------------------------------------------------------------
UserData.java
public class UserData {
    String username;
    String email;
    int age;
    public void setUsername( String value ) {
        username = value;
    public void setEmail( String value ) {
        email = value;
    public void setAge( int value ) {
        age = value;
    public String getUsername() { return username; }
    public String getEmail() { return email; }
    public int getAge() { return age; }
}

A very common question. Tomcat dislikes classes which are not packaged. So, add a package statement in your UserBean.java
package beans; // or something like thatand then place the compiled class file UserBean.class into WEB-INF/classes/beans.
Put the import statement into the JSP accordingly and try again.
***Annie***

What is the difference of using JavaBean and regular classes?

Experts,
I am new to JavaBean(not EJB), and wondering what is the difference of using JavaBean for JSP page compared with using regular Java class?
I know there are Bean tags which save some lines, what else?
What does "serialization" mean compared with "not serializable"?
thanks very much.

No.
A JavaBean is a regular JavaClass that:
1) implements java.io.Serializable
2) Its data members are private, and its data is accessed via getters and setters. You must define the getters and setters. Getters retrive the property, and must be in the format:
public PropertyType getPropertyName()
for most cases. The exception is when the PropertyType is a boolean, in which case you use:
public boolean isPropertyName()
Setters assign values to the property, and are in the form:
public void setPropertyName(PropertyType propValue)
3) There is also a PropertyChangeEvent model that needs to be followed.
A marker interface has no methods you need to implement. It just marks the class as supporting certain operations. In the case of Serializable, it means the class can be written to be an ObjectOutputStream for persistant storage.
As far as an example of JavaBean persistance, take a search on the java.sun.com site for Serializeable
Also, take a look at this: http://java.sun.com/developer/onlineTraining/Beans/beans02/
It concentrates mainly on gui component beans, but not all beans need to be gui parts... There are other pages to look at, but I can't find them at the moment, and I have to run...

Help with jsp and javaBean in eclipse/Tomcat

Hi,
I am new to JSP and JavaBean. I am going through tutorial for a jsp page that uses a javaBean. I am using eclipse to create jsp page and the java bean.
My eclipse project "Date" has five package as under:-
1. Deployment Descriptor
2. Java Resources: src
3. build
4. WebContent
I have my data.jsp page in WebContent/WEB-INF/ folder. When I just run date.jsp in a browser as: http://localhost:8080/Date/date.jsp, it gets launched into the browser correctly. But when I add a JavaBean "TimeFormatterBean.java" in the Java Resources:src folder and use it in date.jsp page, I get errors as under:-
org.apache.jasper.JasperException: Unable to compile class for JSP:
An error occurred at line: 5 in the jsp file: /date.jsp
TimeFormatterBean cannot be resolved to a type
2: pageEncoding="ISO-8859-1"%>
3: <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
4:
5: <jsp:useBean id="formatter" class="TimeFormatterBean"/>
6:
7: <html>
8: <head>
The data.jsp page is as under:-
<jsp:useBean id="formatter" class="TimeFormatterBean"/>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
     <h1> Date JSP </h1>
     <p> The current time is:
     <%= new java.util.Date() %>
     <jsp:getProperty name="formatter" property="name"/>
     </p>
</body>
</html>I can see "TimeFormatterBean.class" in build/classes folder.
If anyone could please help me out with this, it would be very helpful
Thanks a lot!

You probably should place TimeFormatterBean inside a package, or maybe you could try importing it , even if it�s in the default package, with something like this <%@ page import="TimeFormatterBean" %> at the top

JSP with JavaBeans

Hello,
I'm trying to write my first page of JSP using a JavaBean.
I've created a simple bean :
package dalpkg;
public class DalBean
public DalBean()
setName("DIMA");
private String myName;
public void setName(String name)
this.myName=name;
public String getName()
return myName;
}Now i've created a JSP :
<jsp:useBean class="dalpkg.DalBean" id="info" scope="session">
<html>
<head>
<title>Simple JSP Document</title>
</head>
<body>
Initial name is <%=info.getName()%><br>
<% info.setName("Adi"); %>
New name is <%=info.getName()%><br>
</body>
</html>
</jsp:useBean>I'm Getting this error : "/DIMA/hello.jsp(1,1) The value for the useBean class attribute dalpkg.DalBean is invalid"
I couldn't find the solution any where.
Where should I put the .Java file for it to work?
Could this be the reason why this isnt working?

Well thats wierd.. the class file looks ok.. starts just like you said CA FE BA BE.
Recomiling didnt help..
but this code works :
package dalpkg;
public class HelloWorld
public void HelloWorld()
public String ReturnHello()
return "Hello";
<jsp:useBean class="dalpkg.HelloWorld" id="info" scope="session">
<html>
<head>
<title>Simple JSP Document</title>
</head>
<body>
Print Hello : <%=info.ReturnHello()%><br>
</body>
</html>
</jsp:useBean>Edited by: dimamah on Mar 6, 2009 4:43 PM

Using javabean

I try to use javabean
after I compile the javabean and put the class file at WEB-INF\lib
but I get errors like below at jsp page
( I use sun java studio as tool ,is there any reference )
testpage_jsp_jsp.java [67:1] cannot resolve symbol
symbol : class simpleMath
location: class jsps.test_page_jsp_jsp
simpleMath pagecounter = null;
^
testpage_jsp_jsp.java [70:1] cannot resolve symbol
symbol : class simpleMath
location: class jsps.test_page_jsp_jsp
pagecounter= (simpleMath)
^
testpage_jsp_jsp.java [75:1] cannot resolve symbol
symbol : class simpleMath
location: class jsps.test_page_jsp_jsp
pagecounter = (simpleMath) java.beans.Beans.instantiate(this.getClass().getClassLoader(), "simpleMath");
^
thanks for the help

class file go into WEB-INF/classes
You also should packages and import the classes into your jsp

JSP using JavaBeans

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