Qusetion with jsp beans

Hi all
plz help with this question,if i had asimpl jsp file containing the following code:
<html>
<body>
<form method="get" action="second.jsp">
<input type="text" name="name">
<input type="text" name="age">
<input type="submit" name="submit">
</form>
</body>
</html>
and another simple jsp file containing this code:
<html>
<body>
<jsp:useBean id="bean" scope="session" class="thebeans.Bean"/>
<jsp:setProperty name="bean" property="*"/>
<jsp:getProperty name="bean" property="name"/>
<jsp:getProperty name="bean" property="age"/>
<%
bean.DataBase();
%>
</body>
</html>
*DataBase() is amethod that take the input from the jsp file and connect 2 the database 2 see f it exists before</s<br />what i want 2 do is that f it exist load specific html file f not load another html file+
how can i do that and where 2 write it+
*(sorry still new 2 java)*

Actually you're probably off on a false trail with jsp:useBean. The more up to date methods use tag libraries (typically JSTL) and access bean attributes using EL, bean expression language. E.g. you put your initial form data into a request attribute called "data" and you put:
<input type="text" name="property1" value="${data.property1}" ....useBean is no use for binding returned fields from a form. Always remember that your JSP generates HTML and once that HTML is sent to the browser that's it, the JSP has done it's job and finished. Only with JSF, at present, does what you write in your JSP affect the processing of received form data. When you get the form data back you need to "bind" the values from the request back to the bean. A framework like Spring will do this stuff for you, but in a raw Servlet/JSP environment it's up to you.

Similar Messages

Help with jsp beans

Hi ,
I'm new to beans .Please help me on this. I have 2 jsp pages -trial.jsp and trial2.jsp and a bean class-UserInfo.java
I'm setting the bean values from trial.jsp and trying to retrieve from trial2.jsp. But the values are coming as null. Can you please help me on this.
Code of Trial.jsp
<html>
<body>
<form name="beanTest" method="get" action="trial2.jsp">
<table width="60%">
<tr>
    <td width="44%">Name</td>
    <td width="56%"><label>
      <input type="text" name="name" id="name">
    </label></td>
</tr>
<tr>
    <td>Age</td>
    <td><input type="text" name="age" id="age"></td>
</tr>
<tr>
    <td>Occupation</td>
    <td><input type="text" name="occupation" id="occupation"></td>
</tr>
<tr>
    <td><label>
    <jsp:useBean id="person" class="javaUtil.UserInfo" scope="request"/>
<jsp:setProperty property="*" name="person"/>
<input type="submit" value="Test the Bean">
</form>
</body>
</html>
Trial2.jsp
<form>
<jsp:useBean id="person" class="javaUtil.UserInfo" scope="request"/>
Name<jsp:getProperty property="name" name="person"/><br>
age:<jsp:getProperty property="age" name="person"/><br>
job:<jsp:getProperty property="occupation" name="person"/><br>
</form>
UserInfo.java
package javaUtil;
import java.io.Serializable;
public class UserInfo implements Serializable{
     private static final long serialVersionUID = 1L;
     private String name;
     private int age;
     private String occupation;
     public String getName()
          return this.name;
     public void setName(String name)
          this.name=name;
     public int getAge()
          return this.age;
     public void setAge(int age)
          this.age=age;
     public String getOccupation()
          return this.occupation;
     public void setOccupation(String occupation)
          this.occupation=occupation;
Please help me.....

Actually you're probably off on a false trail with jsp:useBean. The more up to date methods use tag libraries (typically JSTL) and access bean attributes using EL, bean expression language. E.g. you put your initial form data into a request attribute called "data" and you put:
<input type="text" name="property1" value="${data.property1}" ....useBean is no use for binding returned fields from a form. Always remember that your JSP generates HTML and once that HTML is sent to the browser that's it, the JSP has done it's job and finished. Only with JSF, at present, does what you write in your JSP affect the processing of received form data. When you get the form data back you need to "bind" the values from the request back to the bean. A framework like Spring will do this stuff for you, but in a raw Servlet/JSP environment it's up to you.

Problem with java beans and jsp on web logic 6.0 sp1

          HI ,
          I am using weblogic6.0 sp1.
          i have problem with jsp and java beans.
          i am using very simple java bean which stores name and email
          from a html form.
          but i am getting following errors:
          Full compiler error(s):
          D:\bea4\wlserver6.0sp1\config\mydomain\applications\DefaultWebApp_myserver\WEB-INF\_tmp_war_myserver_myserver_DefaultWebApp_myserver\jsp_servlet\_savename2.java:89:
          cannot resolve symbol
          symbol : class userbn
          location: class jsp_servlet._savename2
          userbn ud = (userbn) //[ /SaveName2.jsp; Line: 7]
          ^
          D:\bea4\wlserver6.0sp1\config\mydomain\applications\DefaultWebApp_myserver\WEB-INF\_tmp_war_myserver_myserver_DefaultWebApp_myserver\jsp_servlet\_savename2.java:89:
          cannot resolve symbol
          symbol : class userbn
          location: class jsp_servlet._savename2
          userbn ud = (userbn) //[ /SaveName2.jsp; Line: 7]
          ^
          D:\bea4\wlserver6.0sp1\config\mydomain\applications\DefaultWebApp_myserver\WEB-INF\_tmp_war_myserver_myserver_DefaultWebApp_myserver\jsp_servlet\_savename2.java:94:
          cannot resolve symbol
          symbol : class userbn
          location: class jsp_servlet._savename2
          ud = (userbn) java.beans.Beans.instantiate(getClass().getClassLoader(),
          "userbn"); //[ /SaveName2.jsp; Line: 7]
          ^
          3 errors
          in which directory should i place java bean source file(.java file)
          here is my jsp file:
          <%@ page language = "java" contentType = "text/html" %>
          <html>
          <head>
          <title>bean2</title>
          </head>
          <body>
          <jsp:usebean id = "ud" class = "userbn" >
          <jsp:setProperty name = "ud" property = "*" />
          </jsp:usebean>
          <ul>
          <li> name: <jsp:getProperty name = "ud" property = "name" />
          <li> email : <jsp:getProperty name = "ud" property = "email" />
          </ul>
          </body>
          <html>
          here is my bean :
          ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
          import java.io.*;
          public class userbn implements Serializable
               private String name ;
               private String email;
               public void setName(String n)
                    name = n;
               public void setEmail(String e)
                    email = e;
               public String getName()
                    return name;
               public String getEmail()
                    return email;
               public userbn(){}
          ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
          pls help me.
          Thanks
          sravana.


          You realy can do it like Xiang says, but the better way is to use packages. That's
          the way BEA is designed for. If you use packages you can but your bean classes
          in every subfolder beneath Classes. Here for example we have the subfolders test
          and beans:
          You have to declare the package on top of your Bean Source Code:
          package test.beans;
          In your JSP you don't need the import code of Xiang. You only have to refer the
          path of your bean class:
          <jsp:useBean id="testBean" scope="session" class="test.beans.TestBean" />
          There are some other AppServers that only can deploy Java Beans in packages. So
          if you use packages you are always on the right side.
          ciao bernd
          "sravana" <[email protected]> wrote:
          >
          >Thank you very much Xiang Rao, It worked fine.
          >Thanks again
          >sravana.
          >
          >"Xiang Rao" <[email protected]> wrote:
          >>
          >><%@ page import="userbn" language = "java" contentType = "text/html"
          >>%> should
          >>work for you.
          >>
          >>
          >>"sravana" <[email protected]> wrote:
          >>>
          >>>HI ,
          >>>
          >>>I am using weblogic6.0 sp1.
          >>>
          >>>i have problem with jsp and java beans.
          >>>
          >>>i am using very simple java bean which stores name and email
          >>>
          >>>from a html form.
          >>>
          >>>but i am getting following errors:
          >>>
          >>>________________________________________________________________
          >>>
          >>>Full compiler error(s):
          >>>D:\bea4\wlserver6.0sp1\config\mydomain\applications\DefaultWebApp_myserver\WEB-INF\_tmp_war_myserver_myserver_DefaultWebApp_myserver\jsp_servlet\_savename2.java:89:
          >>>cannot resolve symbol
          >>>symbol : class userbn
          >>>location: class jsp_servlet._savename2
          >>> userbn ud = (userbn) //[ /SaveName2.jsp; Line: 7]
          >>> ^
          >>>D:\bea4\wlserver6.0sp1\config\mydomain\applications\DefaultWebApp_myserver\WEB-INF\_tmp_war_myserver_myserver_DefaultWebApp_myserver\jsp_servlet\_savename2.java:89:
          >>>cannot resolve symbol
          >>>symbol : class userbn
          >>>location: class jsp_servlet._savename2
          >>> userbn ud = (userbn) //[ /SaveName2.jsp; Line: 7]
          >>> ^
          >>>D:\bea4\wlserver6.0sp1\config\mydomain\applications\DefaultWebApp_myserver\WEB-INF\_tmp_war_myserver_myserver_DefaultWebApp_myserver\jsp_servlet\_savename2.java:94:
          >>>cannot resolve symbol
          >>>symbol : class userbn
          >>>location: class jsp_servlet._savename2
          >>> ud = (userbn) java.beans.Beans.instantiate(getClass().getClassLoader(),
          >>>"userbn"); //[ /SaveName2.jsp; Line: 7]
          >>> ^
          >>>3 errors
          >>>
          >>>____________________________________________________________
          >>>
          >>>in which directory should i place java bean source file(.java file)
          >>>
          >>>here is my jsp file:
          >>>--------------------------------------------------------
          >>>
          >>><%@ page language = "java" contentType = "text/html" %>
          >>><html>
          >>><head>
          >>><title>bean2</title>
          >>></head>
          >>><body>
          >>><jsp:usebean id = "ud" class = "userbn" >
          >>><jsp:setProperty name = "ud" property = "*" />
          >>></jsp:usebean>
          >>><ul>
          >>><li> name: <jsp:getProperty name = "ud" property = "name" />
          >>><li> email : <jsp:getProperty name = "ud" property = "email" />
          >>></ul>
          >>></body>
          >>><html>
          >>>
          >>>-------------------------------------------------------------
          >>>
          >>>here is my bean :
          >>>
          >>>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
          >>>
          >>>import java.io.*;
          >>>
          >>>public class userbn implements Serializable
          >>>{
          >>>
          >>>     private String name ;
          >>>
          >>>     private String email;
          >>>
          >>>     public void setName(String n)
          >>>     {
          >>>
          >>>          name = n;
          >>>     }
          >>>
          >>>     public void setEmail(String e)
          >>>     {
          >>>
          >>>          email = e;
          >>>     }
          >>>
          >>>     public String getName()
          >>>     {
          >>>
          >>>          return name;
          >>>     }
          >>>
          >>>     public String getEmail()
          >>>     {
          >>>
          >>>          return email;
          >>>     }
          >>>
          >>>     public userbn(){}
          >>>}
          >>>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
          >>>
          >>>pls help me.
          >>>Thanks
          >>>sravana.
          >>>
          >>
          >

How to configure multiple jsp files with diff beans in faces-config.xml??

Hi All,
I have 2 seperate jsp pages one is a login page and the other is the main application page.Now i am handling both the pages with seperate Bean class with respective setter and getter methods.How can i state the same in faces-config.xml file???..
Is the below way correct???
<?xml version='1.0' encoding='UTF-8'?>

<faces-config version="1.2"
    xmlns="http://java.sun.com/xml/ns/javaee"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
                   http://java.sun.com/xml/ns/javaee/web-facesconfig_1_2.xsd">
    <managed-bean>
            <managed-bean-name>LoginForm</managed-bean-name>
            <managed-bean-class>useraccess.LoginForm</managed-bean-class>
            <managed-bean-scope>request</managed-bean-scope>
    </managed-bean>
    <navigation-rule>
            <from-view-id>/login.jsp</from-view-id>
        <navigation-case>
            <from-action>#{LoginForm.CheckValidUser}</from-action>
            <from-outcome>success</from-outcome>
            <to-view-id>/success.jsp</to-view-id>
        </navigation-case>
        <navigation-case>
            <from-action>#{LoginForm.CheckValidUser}</from-action>
            <from-outcome>fail</from-outcome>
            <to-view-id>/fail.jsp</to-view-id>
        </navigation-case>
    </navigation-rule>
    <managed-bean>
            <managed-bean-name>DSRApplication</managed-bean-name>
            <managed-bean-class>DSRApplication.LoginForm</managed-bean-class>
            <managed-bean-scope>request</managed-bean-scope>
    </managed-bean>
    <navigation-rule>
            <from-view-id>/DSR.jsp</from-view-id>
        <navigation-case>
            <from-action>#{DSRApplication.checkValidDateInAllFields}</from-action>
            <from-outcome>alldatasuccess</from-outcome>
            <to-view-id>/success.jsp</to-view-id>
        </navigation-case>
        <navigation-case>
            <from-action>#{DSRApplication.checkValidDateInAllFields}</from-action>
            <from-outcome>datafail</from-outcome>
            <to-view-id>/fail.jsp</to-view-id>
        </navigation-case>
    </navigation-rule>
</faces-config>Thanks in advance to all.
regards,
Viswanadh.

Thanks ejp for the reply.
Since i am a beginner even i dont know the exact reason to answer you for why am i using JSP with Facelets.Kindly provide me the suggestion and valuable information you have so that i can learn.
Apart from this i want to know whether the way provided in that faces-config.xml is possible or do we have a way to make that possible???
regards,
Viswanadh.

Using java bean with jsp

hello friends,
i'm new to jsp. i want to create an html form that accepts username and a value from four radio buttons and display back the entered name and checked radio button's value using java bean.
i use the <jsp:setProperty id="" property="*"> method. i don't know how to access the radio buttons value from the html.
also when i use an additional field other than username the jsp page is showing error.
Please give me the correct method to use java bean with jsp in this circumstance.
thank you.

thank you, but i have a problem left. the case is like this.
i got the jsp and bean worked fine when i have a sinle input text field.
but when i added a second text field i recieved the following error.
javax.servlet.ServletException: basket.newbean.getUserPass()Ljava/lang/String;
     org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:825)
     org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:758)
     org.apache.jsp.newform.process_jsp._jspService(process_jsp.java:69)
     org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:324)
     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)
where userPass is the new form element. I have made the subsequent chanes in my bean program and jsp file.
pls hlp.

Problems with managed beans on included JSPs

I've got a problem with managed beans within an included JSP
The included page looks as follows:
<f:subview id="includedPage" binding="#{testBean.component}">
     <h:outputText value="Hallo from the included page"/>
     <h:outputText value="#{testBean.msg}" />
</f:subview>The including page is also very simple
<f:view>
     <html>
          <head>
               <title>Test include</title>
          </head>
          <body>
               <h:outputText value="Hello from the including page"/>
               <jsp:include page="included.jsp"/>
          </body>
     </html>
</f:view>The testBean is a managed bean with page scope and looks as follows:
public class TestBean {
    public UIComponent fComponent;
    public TestBean() {
        System.out.println("TestBean Constructor called " + toString() );
    public String getMsg() {
        return "Component = " + fComponent ;
    public void setComponent(UIComponent component) {
        System.out.println("setComponent called " + component);
        fComponent = component;
    public UIComponent getComponent() {
        System.out.println("getComponent called " + fComponent);
        return fComponent;
}The output to the console is:
TestBean Constructor called de.kvb.athena.web.beans.TestBean@1bc16f0
getComponent called null
TestBean Constructor called de.kvb.athena.web.beans.TestBean@18622f3
setComponent called javax.faces.component.UINamingContainer@160877b
TestBean Constructor called de.kvb.athena.web.beans.TestBean@5eb489
and the page displays
Hello from the include page
Hello from the included page Component = null
Can anyone explain this behavior ? What's the reason that the page displays
Component = null
and is it possible to display the parent naming container (subview) this way ?
how ?
Thanks

By "page scope" I assume you mean "none"? If so JSF creates a new bean for each place it's referenced. The closest to the behavior you want, once per "page", is really request scope.
(I'm not sure why the constructor is being called thrice, though. I should look into this.)
I assume you want a bean-per-subview scenario. This should be doable, and one way that allows a dynamic number of subviews would be as follows:
--create a "manager" bean in request scope
--give it get/set methods that retrieves a Map of "TestBean" instances; the idea is that each subview use a different key "s1", "s2", etc
back the manager method with Map implementation that checks if there's already a TestBean associated with the key returns it if yes, else null.
If that seems messy, the component solution is hairy :-) See http://forum.java.sun.com/thread.jspa?threadID=568937&messageID=2812561
--A

JSP tag collaboration with BI Beans

Hello!
We need to reorganize a dimension hierarchy in runtime during presentation. It's merely a matter of formatting. We use a tag handler that reeds its body doing some operations and puts a new content for body in page.
We tried this
====================
<My:BodyReaderTag>
<orabi:ListCombo renderAs="combo" autoSubmit="true" biList="${tagtest_dimMemList1_data}"/>
</My:BodyReaderTag>
====================
When doing this my tag grabs all content except the output from orabi:ListCombo. It seems like orabi:ListCombo does not push the JspWriter on the stack (by collaboration with orabi:BIBody tag). When, for testing purposes only, I removed the orabi:BIBody tag, I got the result I would like to get.
How can I get the output from orabi:ListCombo tag? Or if that is not possible, where can I find detailed information so I can create my own customized tag handlers that collaborates with BI Beans,
Thanks in advance,
Mats

The implementation of the <orabi:ListCombo> is based on UIX JSP tags technology. It uses an instance of oracle.cabo.ui.RenderingContext created earlier by the BIThinSession tag to do the actually rendering.
May I ask what are you trying to do with the <my:reformatter> tag? The ListCombo tag has attributes like "styleClass" and "inlineStyle" that can be used customize the look and feel of the content it renders. Also, we provide a set of built-in styles. Have you looked into whether you can use "styleClass" or "inlineStyle" attributes to satisfy your formatting needs?
Hope this helps,
Keith
Oracle Business Intelligence Product Management
BI on Oracle: http://www.oracle.com/bi/
BI on OTN: http://www.oracle.com/technology/products/bi/
BI Beans http://www.oracle.com/technology/products/bib/index.html
Discoverer: http://www.oracle.com/technology/products/discoverer/
BI Software: http://www.oracle.com/technology/software/products/ias/devuse.html
Documentation: http://www.oracle.com/technology/documentation/appserver1012.html
BI Samples: http://www.oracle.com/technology/products/bi/samples/
Blog: http://oraclebi.blogspot.com/

Prob with running jsp Bean

Hi,
I am trying to run a bean through a jsp but its giving error at useBean tag of jsp:
The error is :
HTTP Status 500 -
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException: /Quadratic.jsp(7,0) The value for the useBean class attribute com.brainysoftware.Quadratic is invalid.
     org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:39)
     org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:409)
     org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:150)
     org.apache.jasper.compiler.Generator$GenerateVisitor.visit(Generator.java:1227)
     org.apache.jasper.compiler.Node$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:3272)
     org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:244)
     org.apache.jasper.compiler.Compiler.compile(Compiler.java:470)
     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)
My jsp is:
<HTML>
<HEAD>
<TITLE> JSP BEAN Quadratic Example </TITLE>
</HEAD>
<BODY>
<%@ page language="java" %>
<jsp:useBean id="quadratic" scope="session" class="com.brainysoftware.Quadratic" />
<jsp:setProperty name="quadratic" property="ia" param="a" />
<jsp:setProperty name="quadratic" property="ib" param="b" />
<jsp:setProperty name="quadratic" property="ic" param="c" />
X1= <%= quad.getDx1( ) %>
X2= <%= quad.getDx2( ) %>
End of program
</BODY>
</HTML>my bean is:
package com.brainysoftware;
import java.io.*;
class Quadratic{
int ia;
int ib;
int ic;
String dx1;
String dx2;
public int getIa( ) {
return ia;
public void setIa( int ii) {
ia=ii;
public int getIb( ) {
return ib;
public void setIb(int ii) {
ib=ii;
public int getIc( ) {
return ic;
public void setIc(int ii) {
ic=ii;
public String getDx1( ) {
double detA;
double result;
detA= ib*ib -4*ia*ic;
if(detA<0.0)
return "Real Roots not possible";
else {
result= -ib - Math.sqrt(detA/(2 * ia));
Double Dresult=new Double (result);
return Dresult.toString( );
public String getDx2( ) {
double detA;
double result;
detA= ib*ib -4*ia*ic;
if(detA<0.0)
return "Real Roots not possible";
else {
result= -ib + Math.sqrt(detA/(2 * ia));
Double Dresult=new Double (result);
return Dresult.toString( );
my directory structure is given below:
C:\tomcat-5.0.28\jakarta-tomcat-5.0.28\webapps\jsp-examples\WEB-INF\classes\com\
brainysoftware>dir
Volume in drive C has no label.
Volume Serial Number is 4C50-9542
Directory of C:\tomcat-5.0.28\jakarta-tomcat-5.0.28\webapps\jsp-examples\WEB-IN
F\classes\com\brainysoftware
05/22/2005 11:15 PM <DIR> .
05/22/2005 11:15 PM <DIR> ..
05/22/2005 11:18 PM 134 CalculatorBean.java
05/23/2005 12:12 AM 216 Counter.java
05/24/2005 10:48 PM 358 SimpleJavaBean.java
06/14/2005 11:16 PM 1,205 Calculator.java
06/14/2005 11:16 PM 1,323 Calculator.class
06/16/2005 06:44 PM 534 CalculatorBean2.java
06/17/2005 08:53 AM 703 CalculatorBean2.class
06/16/2005 07:00 PM 352 CalculatorBean2.html
06/17/2005 08:51 AM 588 CalculatorBean2.jsp
06/17/2005 04:29 PM 97 UploadBean.java
06/17/2005 04:43 PM 527 FileUploadBean.java
06/17/2005 04:43 PM 834 FileUploadBean.class
06/18/2005 12:21 PM 863 Quadratic.java
06/18/2005 12:21 PM 1,093 Quadratic.class
14 File(s) 8,827 bytes
2 Dir(s) 8,615,821,312 bytes free
C:\tomcat-5.0.28\jakarta-tomcat-5.0.28\webapps\jsp-examples\WEB-INF\classes\com\
brainysoftware>
The above clearly shows the presence of Bean in the reqd directory but still I am getting an error. Can somebody help me:
Zulfi.

class QuadraticThe class is not public. It is only visible to other classes in the same package as itself, so the servlet (JSP) trying to instantiate and reference it can't see it.
Make it public.

Help me!! How to use JavaScript with JSP ??

I am using JDeveloper and I created a screen in JSP which uses a bean for database connectivity and retriving info onto the page.
The page has a ListBox where list items are populated from the database.My requirement is
whenever the list is changed the page shuold be refreshed with the selected item info.
I tried to use 'JavaScript' for triggering the event with 'onChange' event of the ListBox.But the event is not getting invoked. I think JavaScript is not working with JSP.
Please help me with how to Use javaScript with JSP or any other alternative where I can meet my requirement.
I have one more question...I have gone through the JSP samples in OTN and I am trying do download the sample 'Travel servlet' which show list of countries...etc
I have also gone through the 'readme' but I don't know how to extract .jar file.
I would be great if you could help me in this.
Thanks!!
Geeta
null

We have a similar need. We have used Cold Fusion to display data from Our Oracle Database. We have a simple SElect Box in HTML populated with the oracle data. When someone selects say the State of Pennsylvania. then we have an On change event that runs a Javascript to go get all the cities in Pennsylvania.
Proble we are having is that inorder for the Javascript to work , we currently have to send all the valid data.
Do you know of any way to dynamically query the the Oracle database in Javascript

Use of Threads with JSP's

Can you use threads in a web application that uses JSP's plus Servlets and Beans ?
We have a JRUN 3.1 application using JSPs, Servlets and Beans. Shortly after we went live it became apparent that any 2 users using the same object experienced problems as one object was overwriting another. In a panic the problem was solved by whacking SYNCHRONISED on all objects.
Now we want to write another application, are there strategies for using Threads with JSPs?
Would this be part of the webserver configuration or would the application be coded in a certain way ?
Please can you give me a simplistic answer or point me to some documentation that gives a simple overview.
Thanks Steve

Hi,
You can use thread with jsp, i am sending u a example
package thread;
import java.io.Serializable;
public class TaskBean implements Runnable, Serializable {
private int counter;
private int sum;
private boolean started;
private boolean running;
private int sleep;
public TaskBean() {
counter = 0;
sum = 0;
started = false;
running = false;
sleep = 100;
protected void work() {
try {
Thread.sleep(sleep);
counter++;
sum += counter;
} catch (InterruptedException e) {
setRunning(false);
public synchronized int getPercent() {
return counter;
public synchronized boolean isStarted() {
return started;
public synchronized boolean isCompleted() {
return counter == 100;
public synchronized boolean isRunning() {
return running;
public synchronized void setRunning(boolean running) {
this.running = running;
if (running)
started = true;
public synchronized Object getResult() {
if (isCompleted())
return new Integer(sum);
else
return null;
public void run() {
try {
setRunning(true);
while (isRunning() && !isCompleted())
work();
} finally {
setRunning(false);
And JSP page start.jsp
<% session.removeAttribute("task"); %>
<jsp:useBean id="task" scope="session"
class="thread.TaskBean"/>
<% task.setRunning(true); %>
<% new Thread(task).start(); %>
<jsp:forward page="status.jsp"/>
///////////////// status .jsp
<jsp:useBean id="task" scope="session"
class="thread.TaskBean"/>
<HTML>
<HEAD>
<TITLE>JSP Progress Bar</TITLE>
<% if (task.isRunning()) { %>
<SCRIPT LANGUAGE="JavaScript">
setTimeout("location='status.jsp'", 1000);
</SCRIPT>
<% } %>
</HEAD>
<BODY>
<H1 ALIGN="CENTER">JSP Progress Bar</H1>
<H2 ALIGN="CENTER">
Result: <%= task.getResult() %><BR>
<% int percent = task.getPercent(); %>
<%= percent %>%
</H2>
<TABLE WIDTH="60%" ALIGN="CENTER"
BORDER=1 CELLPADDING=0 CELLSPACING=2>
<TR>
<% for (int i = 10; i <= percent; i += 10) { %>
<TD WIDTH="10%" BGCOLOR="#000080"> </TD>
<% } %>
<% for (int i = 100; i > percent; i -= 10) { %>
<TD WIDTH="10%"> </TD>
<% } %>
</TR>
</TABLE>
<TABLE WIDTH="100%" BORDER=0 CELLPADDING=0 CELLSPACING=0>
<TR>
<TD ALIGN="CENTER">
<% if (task.isRunning()) { %>
Running
<% } else { %>
<% if (task.isCompleted()) { %>
Completed
<% } else if (!task.isStarted()) { %>
Not Started
<% } else { %>
Stopped
<% } %>
<% } %>
</TD>
</TR>
<TR>
<TD ALIGN="CENTER">
<BR>
<% if (task.isRunning()) { %>
<FORM METHOD="GET" ACTION="stop.jsp">
<INPUT TYPE="SUBMIT" VALUE="Stop">
</FORM>
<% } else { %>
<FORM METHOD="GET" ACTION="start.jsp">
<INPUT TYPE="SUBMIT" VALUE="Start">
</FORM>
<% } %>
</TD>
</TR>
</TABLE>
</BODY>
</HTML>
////////////////////////////// stop.jsp
<jsp:useBean id="task" scope="session"
class="thread.TaskBean"/>
<% task.setRunning(false); %>
<jsp:forward page="status.jsp"/>
deploy it into ur server and run start.jsp
and see whatb happens

Deployment problem sdk 1.4 with entity bean

hallo!
i have a big problem with the j2ee sdk 1.4. when i want to add an entity bean to my ear-file, everything goes good, but when i put the sql-ql for the finder-method and save the file i got an error like this
xxxxxxx.ear is corrupt or cannot be read
when i dont save and will show the descriptor it generates an empty descriptor for this entity bean.
the problem is, that the deployment tool cannot generate the deployment desciptor for entity beans. with session bean there was no problems.
hope somebody can help me.
thanks

There's bug in non-U.S. locales. The workaround is described in this thread:
http://forum.java.sun.com/thread.jsp?forum=136&thread=472692&tstart=15&trange=15
-Ian Evans
Sun Microsystems
J2EE Tutorial team

Why JavaBeans with JSP

Hi,
I know its an easy question and probably a silly one to ask, but still please take time to answer this. Why do we use JavaBeans with JSP to make use of reusable code. Cant we use simple classes for this?
Thanks in advance

Hi,
JavaBeans technology is the component architecture for the Java 2 Platform, Standard Edition (J2SE). Components (JavaBeans) are reusable software programs that you can develop and assemble easily to create sophisticated applications. By using Java beans, JSP allows you to keep much more of your code separate from the html than other html embedded languages. Java beans basically let you keep all the logic of your page (like the code to connect to a database, manipulate data etc�) in a separate file known as a Java bean. Then from within your html page - all you do is use one tag to 'use' the bean, and then a few other short tags to send data to and from the bean.
the website http://java.sun.com/products/jsp/html/jsptut.html is a good start, simple and easy understand.
Good luck!
jmling

Please help; how to write XML document with JSP?

I try to write XML document with JSP...
But I got wrong results everytime.
The result is not XML file displayed in the browser,
but HTML file.
I even tried to use HTML special code for <, >, "
but still display as HTML file not XML file.
How to do this?
Thanks in advance. I put my codes below.
Sincerely,
Ted.
================
Here is code for the JSP (called stk.jsp):
<%@ page contentType="text/xml" %>
<%@ page import="bean.Stock" %>
<jsp:useBean id="portfolio" class="bean.Portfolio" />
<% java.util.Iterator pfolio = portfolio.getPortfolio();
Stock stock = null; %>
<?xml version="1.0" encoding="UTF-8"?>
<portfolio>
<% while (pfolio.hasNext())
stock = (Stock) pfolio.next(); %>
<stock>
<symbol>
<%=stock.getSymbol() %>
</symbol>
<name><%=stock.getName() %> </name>
<price><%=stock.getPrice() %> </price>
</stock>
<% } %>
</portfolio>
=================
Here is the code for bean.Stock:
package bean;
public class Stock implements java.io.Serializable
String symbol, name;
float price;
public Stock(String symbol, String name, float price)
this.symbol = symbol;
this.name = name;
this.price = price;
public String getSymbol()
return symbol;
public String getName()
return name;
public float getPrice()
return price;
===============
And here is bean.Portfolio:
package bean;
import java.util.Iterator;
import java.util.Vector;
public class Portfolio implements java.io.Serializable
private Vector portfolio = new Vector();
public Portfolio()
portfolio.addElement(new Stock("SUNW", "Sun Microsystem", 34.5f));
portfolio.addElement(new Stock("HWP", "Hewlett Packard", 15.15f));
portfolio.addElement(new Stock("AMCC", "Applied Micro Circuit Corp.", 101.35f));
public Iterator getPortfolio()
return portfolio.iterator();
}

Hi
I'm not sure whta your query is but I tested your code as it is has been pasted and it seems to work fine. There is an XML output that I'm getting.
Keep me posted.
Good Luck!
Eshwar Rao
Developer Technical Support
Sun microsystems
http://www.sun.com/developers/support

HOW can I call EJB with JSP?

Hi, I'm working with JSP and want to include some EJB. I dont know how can I access EJB through JSP. I dont know if I use the right code in JSP for calling EJB. Did someone know how to use that? Can someone tell me if is the right code in JSP in my example?
Thanks, Kristjan
THIS IS THE JSP: (useejb.jsp)
<%@ taglib uri="http://xmlns.oracle.com/j2ee/jsp/tld/ojsp/ejbtaglib.tld" prefix="EJB" %>
<%@ page import="mypackage1.MySessionEJB" %>
<%@ page import="mypackage1.MySessionEJBHome" %>
<%@ page import="mypackage1.impl.MySessionEJBBean" %>
<HTML>
<head><TITLE>USEBEAN</TITLE></head>
<body>
<EJB:useHome id="mySessionEJBHome" type="mypackage1.MySessionEJBHome" location="java:comp/env/ejb/mySessionEJB" local="false" />
<EJB:useBean id="mySessionEJBBean" type="mypackage1.impl.MySessionEJBBean" local="false">
<EJB:createBean instance="<%=mySessionEJBHome.create() %>" />
</EJB:useBean>
<%= mySessionEJBBean.calc() %>
</body>
</html>
THIS IS THE EJB CODE:(MySessionEJBBean.java)
package mypackage1.impl;
import javax.ejb.SessionBean;
import javax.ejb.SessionContext;
import java.lang.String.*;
public class MySessionEJBBean implements SessionBean
public void ejbCreate(){}
public void ejbActivate(){}
public void ejbPassivate(){}
public void ejbRemove(){}
public void setSessionContext(SessionContext ctx){}
public String calc(String value)
return value + value;
public String zanka(String x)
return x;
(MySessionEJB.java)
package mypackage1;
import javax.ejb.EJBObject;
import java.rmi.RemoteException;
public interface MySessionEJB extends EJBObject
public String calc(String value) throws RemoteException;
String zanka(String x) throws RemoteException;
(MySessionEJBHome.java)
package mypackage1;
import javax.ejb.EJBHome;
import java.rmi.RemoteException;
import javax.ejb.CreateException;
public interface MySessionEJBHome extends EJBHome
public MySessionEJB create() throws RemoteException, CreateException;
}

You might want to look at using a Java Bean wrapper, this can be done automically using WebSphere. It creates what is called an access bean which the JSP imports.
HTH,
J.Clancey

JCalendar its not working with other beans with implementation class

Hello,
Jcalendar DEMO from http://forms.pjc.bean.over-blog.com/article-14848846.html and its working , even in new clean new form but if it with other beans like lafbean,keytypedbean etc... it gives this error:
Java Plug-in 1.6.0_34
Using JRE version 1.6.0_34-b04 Java HotSpot(TM) Client VM
Forms Session ID is formsapp.27
The proxy host is null, and the proxy port is 0.
Native HTTP implementation is being used for the connection.
The connection mode is HTTP.
Forms Applet version is 11.1.2.0
! DrawLAF57: ***                    ***
! DrawLAF57: ***     Look and Feel Project v1.7.4     ***
! DrawLAF57: ***                    ***
*------- L&F Java memory report [DrawLAF Init()] -------*
*----------> DrawLAF57 total: 27217920 used: 22697928   free:4519992
SCALE_IMAGE=Width=FIT,Height=FIT
jsp Width=java.awt.Dimension[width=523,height=409]
Scale Width=523
Scale Height=409
Clear image
loading (shared) icon filename=/120.png
loading (shared) icon filename=/7.png
loading (shared) icon filename=/Printer.png
loading (shared) icon filename=/8.png
loading (shared) icon filename=/44.png
loading (shared) icon filename=/Search.png
loading (shared) icon filename=/10.png
loading (shared) icon filename=/96.png
loading (shared) icon filename=/99.png
loading (shared) icon filename=/98.png
loading (shared) icon filename=/97.png
loading (shared) icon filename=/118.png
loading (shared) icon filename=/Calender18.png
loading (shared) icon filename=/Calender18.png
loading (shared) icon filename=/119.png
loading (shared) icon filename=/Tick.png
Exception in thread "AWT-EventQueue-2" java.lang.NullPointerException
     at com.jgoodies.looks.plastic.PlasticComboBoxButton.paintComponent(PlasticComboBoxButton.java:206)
     at javax.swing.JComponent.paint(Unknown Source)
     at javax.swing.JComponent.paintChildren(Unknown Source)
     at javax.swing.JComponent.paint(Unknown Source)
     at javax.swing.JComponent.paintChildren(Unknown Source)
     at javax.swing.JComponent.paint(Unknown Source)
     at javax.swing.JComponent.paintChildren(Unknown Source)
     at javax.swing.JComponent.paint(Unknown Source)
     at javax.swing.JComponent.paintChildren(Unknown Source)
     at javax.swing.JComponent.paint(Unknown Source)
     at javax.swing.JComponent.paintChildren(Unknown Source)
     at javax.swing.JComponent.paint(Unknown Source)
     at javax.swing.JComponent.paintChildren(Unknown Source)
     at javax.swing.JComponent.paint(Unknown Source)
     at javax.swing.JComponent.paintChildren(Unknown Source)
     at javax.swing.JComponent.paint(Unknown Source)
     at javax.swing.JLayeredPane.paint(Unknown Source)
     at javax.swing.JComponent.paintChildren(Unknown Source)
     at javax.swing.JComponent.paintToOffscreen(Unknown Source)
     at javax.swing.RepaintManager$PaintManager.paintDoubleBuffered(Unknown Source)
     at javax.swing.RepaintManager$PaintManager.paint(Unknown Source)
     at javax.swing.RepaintManager.paint(Unknown Source)
     at javax.swing.JComponent.paint(Unknown Source)
     at java.awt.GraphicsCallback$PaintCallback.run(Unknown Source)
     at sun.awt.SunGraphicsCallback.runOneComponent(Unknown Source)
     at sun.awt.SunGraphicsCallback.runComponents(Unknown Source)
     at java.awt.Container.paint(Unknown Source)
     at java.awt.Window.paint(Unknown Source)
     at javax.swing.RepaintManager.paintDirtyRegions(Unknown Source)
     at javax.swing.RepaintManager.paintDirtyRegions(Unknown Source)
     at javax.swing.RepaintManager.prePaintDirtyRegions(Unknown Source)
     at javax.swing.RepaintManager.access$700(Unknown Source)
     at javax.swing.RepaintManager$ProcessingRunnable.run(Unknown Source)
     at java.awt.event.InvocationEvent.dispatch(Unknown Source)
     at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
     at java.awt.EventQueue.access$000(Unknown Source)
     at java.awt.EventQueue$1.run(Unknown Source)
     at java.awt.EventQueue$1.run(Unknown Source)
     at java.security.AccessController.doPrivileged(Native Method)
     at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
     at java.awt.EventQueue.dispatchEvent(Unknown Source)
     at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
     at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
     at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
     at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
     at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
     at java.awt.EventDispatchThread.run(Unknown Source)
Exception in thread "AWT-EventQueue-2" java.lang.NullPointerException
     at com.jgoodies.looks.plastic.PlasticComboBoxButton.paintComponent(PlasticComboBoxButton.java:206)
     at javax.swing.JComponent.paint(Unknown Source)
     at javax.swing.JComponent.paintChildren(Unknown Source)
     at javax.swing.JComponent.paint(Unknown Source)
     at javax.swing.JComponent.paintToOffscreen(Unknown Source)
     at javax.swing.RepaintManager$PaintManager.paintDoubleBuffered(Unknown Source)
     at javax.swing.RepaintManager$PaintManager.paint(Unknown Source)
     at javax.swing.RepaintManager.paint(Unknown Source)
     at javax.swing.JComponent._paintImmediately(Unknown Source)
     at javax.swing.JComponent.paintImmediately(Unknown Source)
     at javax.swing.RepaintManager.paintDirtyRegions(Unknown Source)
     at javax.swing.RepaintManager.paintDirtyRegions(Unknown Source)
     at javax.swing.RepaintManager.prePaintDirtyRegions(Unknown Source)
     at javax.swing.RepaintManager.access$700(Unknown Source)
     at javax.swing.RepaintManager$ProcessingRunnable.run(Unknown Source)
     at java.awt.event.InvocationEvent.dispatch(Unknown Source)
     at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
     at java.awt.EventQueue.access$000(Unknown Source)
     at java.awt.EventQueue$1.run(Unknown Source)
     at java.awt.EventQueue$1.run(Unknown Source)
     at java.security.AccessController.doPrivileged(Native Method)
     at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
     at java.awt.EventQueue.dispatchEvent(Unknown Source)
     at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
     at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
     at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
     at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
     at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
     at java.awt.EventDispatchThread.run(Unknown Source)
Exception in thread "AWT-EventQueue-2" java.lang.NullPointerException
     at com.jgoodies.looks.plastic.PlasticComboBoxButton.paintComponent(PlasticComboBoxButton.java:206)
     at javax.swing.JComponent.paint(Unknown Source)
     at javax.swing.JComponent.paintChildren(Unknown Source)
     at javax.swing.JComponent.paint(Unknown Source)
     at javax.swing.JComponent.paintToOffscreen(Unknown Source)
     at javax.swing.RepaintManager$PaintManager.paintDoubleBuffered(Unknown Source)
     at javax.swing.RepaintManager$PaintManager.paint(Unknown Source)
     at javax.swing.RepaintManager.paint(Unknown Source)
     at javax.swing.JComponent._paintImmediately(Unknown Source)
     at javax.swing.JComponent.paintImmediately(Unknown Source)
     at javax.swing.RepaintManager.paintDirtyRegions(Unknown Source)
     at javax.swing.RepaintManager.paintDirtyRegions(Unknown Source)
     at javax.swing.RepaintManager.prePaintDirtyRegions(Unknown Source)
     at javax.swing.RepaintManager.access$700(Unknown Source)
     at javax.swing.RepaintManager$ProcessingRunnable.run(Unknown Source)
     at java.awt.event.InvocationEvent.dispatch(Unknown Source)
     at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
     at java.awt.EventQueue.access$000(Unknown Source)
     at java.awt.EventQueue$1.run(Unknown Source)
     at java.awt.EventQueue$1.run(Unknown Source)
     at java.security.AccessController.doPrivileged(Native Method)
     at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
     at java.awt.EventQueue.dispatchEvent(Unknown Source)
     at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
     at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
     at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
     at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
     at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
     at java.awt.EventDispatchThread.run(Unknown Source)
Any idea?
Charles.

Those are not Oracle demos. Please post your questions about those on their forum:
http://forms-pjc-bean.space-forums.com/

Qusetion with jsp beans

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