Using Beans in jsp

hi all,
i am using bean in my jsp page.but it is not working it shows error. i have run this with even Tomcat or WebLogic. even i have just Copy paste code from net.
the code is
index.jsp
<%@ page errorPage="errorpage.jsp" %>
<jsp:useBean id="counter" scope="session" class="beans.Counter" />
<html>
<head>
<title>Session Bean Example 1</title>
</head>
<body>
<H3>Session Bean Example 1</H3>
<center><b>The current count for the counter bean is: </b>
<%=counter.getCount() %></center>
</body>
</html>
Bean -Counter.java
package beans;
import java.io.Serializable;
public class Counter implements Serializable{
int count = 0;
public Counter(){
public int getCount() {
count++;
return this.count;
public void setCount(int count) {
this.count = count;
and error on browser is
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException: /index.jsp(3,0) The value for the useBean class attribute beans.Counter is invalid.
     org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:512)
     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:377)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
root cause
org.apache.jasper.JasperException: /index.jsp(3,0) The value for the useBean class attribute beans.Counter is invalid.
     org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:39)
     org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:405)
     org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:146)
     org.apache.jasper.compiler.Generator$GenerateVisitor.visit(Generator.java:1174)
     org.apache.jasper.compiler.Node$UseBean.accept(Node.java:1116)
     org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2163)
     org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2213)
     org.apache.jasper.compiler.Node$Visitor.visit(Node.java:2219)
     org.apache.jasper.compiler.Node$Root.accept(Node.java:456)
     org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2163)
     org.apache.jasper.compiler.Generator.generate(Generator.java:3320)
     org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:198)
     org.apache.jasper.compiler.Compiler.compile(Compiler.java:295)
     org.apache.jasper.compiler.Compiler.compile(Compiler.java:276)
     org.apache.jasper.compiler.Compiler.compile(Compiler.java:264)
     org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:563)
     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:305)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
note The full stack trace of the root cause is available in the Apache Tomcat/5.5.20 logs.
Please let me know how can i handle this situation

Try this
After<hsp:useBean>
<jsp:setProperty name="counter" property="setCounter" value=1 />
<jsp:getProperty name="counter" property="getCounter" />

Similar Messages

Error while using Beans in JSP

I am using netbeans to develop the applications and am using tomcat version (jakarta-tomcat-4.1.18).
When I execute the following program i get the below mentioned error::
StringBean.java
package test;
import java.beans.*;
public class StringBean {
private String message = "No message SPECIFIED";
public String getMessage() {
return message;
public void setMessage(String message) {
this.message = message;
StringBean.jsp
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE>Using JavaBeans with JSP </TITLE>
<LINK REL=STYLESHEET HREF="JSP-Styles.css" TYPE="text/css" >
</HEAD>
<body
<jsp:useBean id = "SB" class = "test.StringBean" />
initial value is : <jsp:getProperty name = "SB" property= "message"/>
<jsp:setProperty name= "SB" property = "message" value= "this the message after the change"/>
final value is :<jsp:getProperty name = "SB" property= "message"/>
</body>
</HTML>
javax.servlet.ServletException: test/StringBean
at org.netbeans.modules.tomcat.tomcat40.runtime.IDEJspServlet.service(IDEJspServlet.java:349)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:243)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:190)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
     at org.apache.catalina.valves.CertificatesValve.invoke(CertificatesValve.java:246)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
     at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2347)
     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
     at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:170)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
     at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:468)
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     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
     at org.apache.catalina.connector.http.HttpProcessor.process(HttpProcessor.java:1027)
     at org.apache.catalina.connector.http.HttpProcessor.run(HttpProcessor.java:1125)
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Root Cause
java.lang.NoClassDefFoundError: test/StringBean
     at java.lang.Class.getDeclaredConstructors0(Native Method)
     at java.lang.Class.privateGetDeclaredConstructors(Class.java:1590)
     at java.lang.Class.getConstructor0(Class.java:1762)
     at java.lang.Class.newInstance0(Class.java:276)
     at java.lang.Class.newInstance(Class.java:259)
at org.netbeans.modules.tomcat.tomcat40.runtime.IDEJspServlet$JspServletWrapper.load(IDEJspServlet.java:106)
     at org.netbeans.modules.tomcat.tomcat40.runtime.IDEJspServlet$JspServletWrapper.loadIfNecessary(IDEJspServlet.java:150)
     at org.netbeans.modules.tomcat.tomcat40.runtime.IDEJspServlet$JspServletWrapper.service(IDEJspServlet.java:160)
     at org.netbeans.modules.tomcat.tomcat40.runtime.IDEJspServlet.serviceJspFile(IDEJspServlet.java:246)
     at org.netbeans.modules.tomcat.tomcat40.runtime.IDEJspServlet.service(IDEJspServlet.java:339)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:243)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:190)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
     at org.apache.catalina.valves.CertificatesValve.invoke(CertificatesValve.java:246)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
     at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2347)
     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
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     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:170)
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     at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:468)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
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     at org.apache.catalina.connector.http.HttpProcessor.process(HttpProcessor.java:1027)
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Ok The class isn't found, so your classpath settings of netbeans (if you are using the run function in netbeans) isn't set.
and if you aren't using netbeans to run it, then the class isn't in the webapp/WEB-INF/classes
good luck

Use bean in jsp, please help me out

Hi all,
As a beginner in jsp I want to use a bean into my jsp page. But this bean is sourcing from a old applet (i've converted the code applet into beans code), and should return a chart (grpahics).
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Mypackage.mybean.paint(Graphics g);
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I don't think that you can use the Graphics object in a JSP. A JSP is executed on the server side and only the output from that will be sent to the client. If you want to use Graphics objects etc, I think that you'll have to send it to an applet (possibly embedded in the page), but since I've never done this, I can't help you, I'm afraid.
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Raj.

Calling a Jdialog from javascript using bean in JSP

Hello all...
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sample code :
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codes for display is written......
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Where is the JavaBean? Are you using an (J)Applet to deploy the bean to the client? If so then you might want to hop on over to the [Applet Forum|http://forums.sun.com/forum.jspa?forumID=421] to see what the problem is. When you do, show them the JavaScript you use to access the Applet.
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Using beans with jsp

Hi
i am using tomcat 6.0 and jdk 1.6u17
i am trying to use a bean to connect to MySql db using jsp page but i keep getting the error :
org.apache.jasper.JasperException: org.apache.jasper.JasperException: Unable to load class for JSP
i read about it and i think that it is unable to locate my bean class file
here is the beanDb.java
package beans;
import java.sql.;
import java.io.;
public class beanDb
private Connection dbCon;
String path="jdbc:mysql://localhost:3306/dbname?user=username&password=pwd";
String dbDriver="com.mysql.jdbc.Driver";
public beanDb()
super();
public boolean connect() throws ClassNotFoundException,SQLException
Class.forName(dbDriver);
dbCon = DriverManager.getConnection(path);
return true;
public void close() throws SQLException
dbCon.close();
public void path()
public ResultSet execSQL(String sql) throws SQLException
Statement s = dbCon.createStatement();
ResultSet r = s.executeQuery(sql);
return (r == null) ? null : r;
public int updateSQL(String sql) throws SQLException
Statement s = dbCon.createStatement();
int r = s.executeUpdate(sql);
return (r == 0) ? 0 : r;
and the jsptest.jsp code is :
<%@ page contentType="text/html; charset=iso-8859-1" language="java" import="java.sql.*" errorPage="" %>
<jsp:useBean id="beanDb" class="beanDb" scope="request" />
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<title>Untitled Document</title>
</head>
<body>
<%
out.println(beanDb.connect());
%>
</body>
</html>
the location of these files are :
C:\Program Files\Apache Software Foundation\Tomcat 6.0\webapps\myApp\WEB-INF\classes\beans\beanDb.java
C:\Program Files\Apache Software Foundation\Tomcat 6.0\webapps\myApp\jsptest.jsp
Please suggest a solution..
Thanks

http://forums.sun.com/thread.jspa?threadID=5423314

Using beans with jsp without any ide

Hi
i am using tomcat 6.0 and jdk 1.6u17
i am trying to use a bean to connect to MySql db using jsp page but i keep getting the error :
org.apache.jasper.JasperException: org.apache.jasper.JasperException: Unable to load class for JSP
i read about it and i think that it is unable to locate my bean class file
here is the beanDb.java
package beans;
import java.sql.*;
import java.io.*;
public class beanDb
     private Connection dbCon;
     String path="jdbc:mysql://localhost:3306/dbname?user=username&password=pwd";
     String dbDriver="com.mysql.jdbc.Driver";
     public beanDb()
          super();
     public boolean connect() throws ClassNotFoundException,SQLException
Class.forName(dbDriver);
dbCon = DriverManager.getConnection(path);
return true;
     public void close() throws SQLException
     dbCon.close();
     public void path()
     public ResultSet execSQL(String sql) throws SQLException
          Statement s = dbCon.createStatement();
ResultSet r = s.executeQuery(sql);
return (r == null) ? null : r;
     public int updateSQL(String sql) throws SQLException
     Statement s = dbCon.createStatement();
int r = s.executeUpdate(sql);
return (r == 0) ? 0 : r;
and the jsptest.jsp code is :
<%@ page contentType="text/html; charset=iso-8859-1" language="java" import="java.sql.*" errorPage="" %>
<jsp:useBean id="beanDb" class="beanDb" scope="request" />
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<title>Untitled Document</title>
</head>
<body>
<%
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               ResultSet rs = null;
%>
</body>
</html>
the location of these files are :
C:\Program Files\Apache Software Foundation\Tomcat 6.0\webapps\ROOT\myApp\WEB-INF\classes\beans\beanDb.java
C:\Program Files\Apache Software Foundation\Tomcat 6.0\webapps\ROOT\myApp\jsptest.jsp
Please suggest a solution..
Thanks

here is the changed code but still the same error:
package beans;
import java.sql.;
import java.io.;
public class beanDb
private Connection dbCon;
String path="jdbc:mysql://localhost:3306/dbname?user=username&password=pwd";
String dbDriver="com.mysql.jdbc.Driver";
public beanDb()
super();
public boolean connect() throws ClassNotFoundException,SQLException
Class.forName(dbDriver);
dbCon = DriverManager.getConnection(path);
return true;
public void close() throws SQLException
dbCon.close();
public void path()
public ResultSet execSQL(String sql) throws SQLException
Statement s = dbCon.createStatement();
ResultSet r = s.executeQuery(sql);
return (r == null) ? null : r;
public int updateSQL(String sql) throws SQLException
Statement s = dbCon.createStatement();
int r = s.executeUpdate(sql);
return (r == 0) ? 0 : r;
and the jsptest.jsp code is :
<%@ page contentType="text/html; charset=iso-8859-1" language="java" import="java.sql.*" errorPage="" %>
<jsp:useBean id="beanDb" class="beanDb" scope="request" />
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<title>Untitled Document</title>
</head>
<body>
<%
out.println(beanDb.connect());
%>
</body>
</html>
the location of these files are :
C:\Program Files\Apache Software Foundation\Tomcat 6.0\webapps\myApp\WEB-INF\classes\beans\beanDb.java
C:\Program Files\Apache Software Foundation\Tomcat 6.0\webapps\myApp\jsptest.jsp

Java.lang.NoSuchMethodError using beans and JSP

Hi,
I get a
java.lang.NoSuchMethodError: Unit.UnitBean.execSQL(Ljava/lang/String; Ljava/sql/ResultSet;
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Any help would be greatly appreciated.
Mike
Heres a copy of my java bean code:
package Unit;
import java.sql.*;
import java.io.*;
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<%@ page import="java.io.*" %>
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Yeah, that worked great, thanks a lot. I thought that JSP compiled when you changed it and then visited it, but i've tried that. I just ran ant stop start on my server and it's all working.
Thanks again :)
Mike

Error when use Bean in JSP... Help!

-- JSP File --
<%@ page import="com.puppet.javabean.database.DBBean" %>
<jsp:useBean      id="connectionPool"
          scope="application"
          class="DBBean" >
<jsp:setProperty     name="connectionPool"
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</jsp:useBean>
-- JavaBean --
import java.io.Serializable;
public class DBBean implements Serializable
private String driver;
void setDriver(String driver)
     System.out.println("------------"+driver+"------------");
     this.driver = driver;
public String getDriver()
     return driver;
But it gen. error in Tomcat.
-- Error --
org.apache.jasper.JasperException: Cannot find any information on property 'Driver' in a bean of type 'DBBean'
at org.apache.jasper.runtime.JspRuntimeLibrary.introspecthelper(Unknown
Source)
how can i solve this ?
Thx a lot

[Servlet.LOG]: account: init
[1/21/05 15:37:59:234 IST] 6ab9ec7e WebGroup E SRVE0020E: [Servlet Error]-[account]: Failed to load servlet: javax.servlet.ServletException: Failed to load JSP file: /JSP/account.jsp
com.ibm.ws.webcontainer.servlet.LoadTargetServletFailure: Failed to load target servlet [account]

Cannot resolve the symbol while using use bean in jsp

Hi,
          Jsp with weblogic version 4.5 were running fine. When running on
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          Thanks
          madhu


Three possibilities:
          Is your directory name really "Web-inf"? That will not work. It needs to be "WEB-INF".
          In WEB-INF, do you have:
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          When you say "cannot resolve symbol", is it the LinkRS class that it can't resolve?

Use beans in jsp

Hi,
I have a file called "SAXParserBean.java" in /WEB-INF/classes/beans/xml/sax and another file called "SAXElement.java" in /WEB-INF/classes/beans/xml/sax.
I have compiled SAXElement.java successfully and get the SAXElement.class, but when I compile
SAXElement.java, I got the following errors :
==============
C:\Program Files\Allaire\JRun\servers\default\default-app\WEB-INF\classes\beans\
xml\sax>javac SAXParserBean.java
SAXParserBean.java:16: Class beans.xml.sax.SAXElement not found.
private SAXElement currentElement=null;
^
SAXParserBean.java:32: Class beans.xml.sax.SAXElement not found.
currentElement = new SAXElement(uri, localName, qName, attrs);
^
SAXParserBean.java:33: Class beans.xml.sax.SAXElement not found in void startEle
ment(java.lang.String, java.lang.String, java.lang.String, org.xml.sax.Attribute
s).
vector.addElement(currentElement);
^
SAXParserBean.java:50: Invalid left hand side of assignment.
if (currentElement!=null && elementText1=null)
^
4 errors
==========================
It seemed that it don't recoginze the SAXElement.class, do anybody know why??
It's urgent, if anybody knows,please let me know, thanks.
Thanks,
ED

1. Seems like we have missed beans.xml.sax.SAXElement.class in classpath.
2. SAXParserBean.java:50: Invalid left hand side of assignment.    if (currentElement!=null && elementText1=null)
                                            ^
                                             \_ This must be == (not a single =)

Beans through jsp

hi,
i' m trainee developer and working in struts. i'm totally novice in this regard. my pl asked me to develop an application on struts. i'm getting problem while using bean through jsp. i'm writing code:
<jsp:useBean id="myBean" class="MyBean" type="MyBean" scope = "session"/>
the error is:
cannot resolve symbol
symbol : class MyBean
location: class org.apache.jsp.confirm_jsp
MyBean myBean = null;
^
total 3 errors associated with it. MyBean class is located in WEB-INF/classes
can any one help me out?

put your bean in a package and put that package under the WEB-INF/classes directory. Then use the fully qualified class name for the jsp:useBean:
//in the bean
package net.thelukes.myprog.beans;
//the jsp:useBean
<jsp:useBean id="myBean" class="net.thelukes.myprog.beans.MyBean" scope="session"/>

How To Use EJB in JSP

I've used beans in JSP.. but how to use EJB's in beans ??
EJB's are deployed in Oracle 8i
Please Help
Thank You.

Please find the answer in this HOWTO:
http://technet.oracle.com:89/ubb/Forum2/HTML/006404.html
HOWTO's are archived on the JDeveloper Documentation page:
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Thanks,
-Roel.

Using JavaBeans into JSP

I have a simple example for using Beans in JSP and the problem is that i get this error: org.apache.jasper.JasperException: /BeanCounter.jsp(8,0) The value for the useBean class attribute Counter is invalid.
The program's ideea is to count how many times i've accesed the bean
This is the code: (i'm using Apache Tomcat 5.5)
My bean (Counter):
import java.io.Serializable;
public class Counter implements Serializable{
int count = 0;
public Counter() {
public int getCount() {
count++;
return this.count;
public void setCount(int count) {
this.count = count;
and the code for BeanCounter.jsp :
<HTML>
<HEAD>
<TITLE>JSP Bean Example</TITLE>
</HEAD>
<BODY>
<%@ page language="java" %>
<jsp:useBean id="counter" scope="session" class="Counter" /> //i guess that here is the problem but i don't have a package or anything else
<jsp:setProperty name="counter" property="count" param="count" />
<%
out.println("Count from scriptlet code : "
+ counter.getCount() + "<BR>");
%>


Count from jsp:getProperty :
<jsp:getProperty name="counter" property="count" /><BR>
</BODY>
</HTML>
The Counter.class is in WEB-INF/classes
I just cannot understand why it doesn't work. Please help :) Thanks in advance

So put your class in a package, and it should work fine.
package mypackage;
import java.io.Serializable;
import java.io.Serializable;
public class Counter implements Serializable {
     int count = 0;
     public Counter() {
     public int getCount() {
          count++;
          return this.count;
     public void setCount(int count) {
          this.count = count;
}and in your JSP:
<jsp:useBean id="counter" scope="session" class="mypackage.Counter" />
The class then moves to be WEB-INF/classes/mypackage/Counter.class
Also, your original post was missing a closing '}' on the Counter class.

Database connection using beans

Hi, I'm very new to JSP. I'm trying to write an application which has a Login page which the user uses to login to a Oracle database (with their own User ID and password). Once the user has successfully logged in I would like to use the same connection to all the other pages the user is traversing until the user logs out. I have come to know that this is possible using beans in JSP or using the connection pool, but I'm not 100% sure how. Can someone please provide me some sample code of the Login page, the beans and a third page which uses the connection. I really appreciate your time and efforts. Thanks a lot in advance for all your efforts and support.
Cheers
Balaji

What you have to learn is how to use session variables after you have successfully logged in your pages. What the next succeeding pages will do is to check if this session variable is not null or valid and then proceed with the display of the pages or redirect it to the login page otherwise. You can implement this sesion variable as a bean to store all the details for a particular user.
Typically you will use
Object o = session.getAttribute("yourSessionVariable");
if (o ==null)
// go to login page OR
// create a session variable
// like session.setAttribute("yourSessionVariable", new Object());
}else
//proceed with the display
Here, o is your bean.
Hope this helps

Problem with JSP using bean packaged in jar file

Hi,
          I am trying to use a java bean in a jsp file. The java bean is packaged
          into a jar file. I am getting class not found compilation error. If the
          bean remains to be a seperated class file, everything work well.
          Does anyone know how I can use bean in a jar file within jsp , i.e. to
          allow the bean to be found during compilation ?
          Thanks,
          Terence.
          [email protected]


Jacek,
          Thanks for replying.
          My JSP's are just files in my document root . However, I found a solution to
          my
          problem. That is to have the jar file defined in my weblogic.class.path. I may
          have missed some files in my original jar file which causes my problem.
          Mayby I should package everything into a web application for deployment. That
          will be my next step.
          Thanks anyway.
          Terence.
          Jacek Laskowski wrote:
          > Terence Lai wrote:
          > >
          > > Hi,
          > >
          > > I am trying to use a java bean in a jsp file. The java bean is packaged
          > > into a jar file. I am getting class not found compilation error. If the
          > > bean remains to be a seperated class file, everything work well.
          >
          > How do you use the JSP file ? Is it a part of web application ? If so,
          > the bean jar package should be located in WEB-INF/lib directory. It's
          > also recommended to put the bean class into a package, so it's not in
          > 'unnamed' package, and <jsp:useBean> can find it.
          >
          > >
          > > Does anyone know how I can use bean in a jar file within jsp , i.e. to
          > > allow the bean to be found during compilation ?
          >
          > see above.
          >
          > > Terence.
          >
          > Jacek Laskowski
          > HP Consulting

Using Beans in jsp

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