Java Bean Problem

Hi,
          I have encountered a Java bean/JSP problem. I have developed a simple test
          case as follows:
          Paramtest.jsp:
          <html>
          <head>
          <title>Param Test</title>
          <body>
          <p>
          <form name="form1" method=post action="formtest.jsp">
          <input name="check1" type="checkbox">Check1
          <br>
          <input type="submit" value="OK" type="submit">
          </form>
          </body>
          </html>
          Formtest.jsp:
          <jsp:useBean id="cbtest" class="com.ebiffa.cbtest"
          scope="request" />
          <jsp:setProperty name="cbtest" property="*" />
          <html>
          <body>
          check1= <%= cbtest.getCheck1() %>
          </body>
          </html>
          cbtest.java:
          package com.ebiffa;
          public class cbtest {
          boolean check1;
          public void setcheck1 (boolean check1) {
          this.check1=check1;
          public boolean getCheck1() {
          return check1;
          When I run the program check1 always shows 'false' regardless of whether the
          checkbox is checked.
          I am running Weblogic 5.1.0 SP8
          The program works OK on Tomcat
          Any ideas ???
          Thanks in anticipation

I had already pick that typo up I posted the wrong source code for the bean.
          "Nils Winkler" <[email protected]> wrote in message
          news:[email protected]...
          > The problem is in your bean class: The set-method's name should be
          > "setCheck1", not "setcheck1". Capitalization matters in this case (no
          > pun intended).
          >
          > Hope this helps,
          >
          > Nils
          >
          > Ian McDermid wrote:
          > >
          > > Hi,
          > >
          > > I have encountered a Java bean/JSP problem. I have developed a simple
          test
          > > case as follows:
          > >
          > > Paramtest.jsp:
          > >
          > > <html>
          > > <head>
          > > <title>Param Test</title>
          > > <body>
          > > <p>
          > > <form name="form1" method=post action="formtest.jsp">
          > > <input name="check1" type="checkbox">Check1
          > > <br>
          > > <input type="submit" value="OK" type="submit">
          > > </form>
          > > </body>
          > > </html>
          > >
          > > Formtest.jsp:
          > >
          > > <jsp:useBean id="cbtest" class="com.ebiffa.cbtest"
          > > scope="request" />
          > > <jsp:setProperty name="cbtest" property="*" />
          > > <html>
          > > <body>
          > > check1= <%= cbtest.getCheck1() %>
          > > </body>
          > > </html>
          > >
          > > cbtest.java:
          > >
          > > package com.ebiffa;
          > > public class cbtest {
          > >
          > > boolean check1;
          > >
          > > public void setcheck1 (boolean check1) {
          > > this.check1=check1;
          > > }
          > > public boolean getCheck1() {
          > > return check1;
          > > }
          > >
          > > }
          > >
          > > When I run the program check1 always shows 'false' regardless of whether
          the
          > > checkbox is checked.
          > >
          > > I am running Weblogic 5.1.0 SP8
          > >
          > > The program works OK on Tomcat
          > >
          > > Any ideas ???
          > >
          > > Thanks in anticipation
          >
          > --
          > ============================
          > [email protected]

Similar Messages

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.
          >>>
          >>
          >

Problems with a java bean in Weblogic 5.1

Hello,
          I am having a problem deploying a java bean in Weblogic 5.1:
          I have been given a .class and a .jar file for a java bean (not an EJB). I
          placed the .class file into e:\temp\WEB-INF\classes and added the following
          line to my weblogic.properties file:
          weblogic.httpd.webApp.testApp=e:/temp/
          I have also updated the web.xml file in the WEB-INF directory as follows:
          <?xml version="1.0" encoding="UTF-8"?>
          <!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web
          Application 1.2//EN"
          "http://java.sun.com/j2ee/dtds/web-app_2_2.dtd">
          <web-app>
          <servlet>
          <servlet-name>EdIface</servlet-name>
          <jsp-file>test.jsp</jsp-file>
          </servlet>
          <servlet-mapping>
          <servlet-name>EdIface</servlet-name>
          <url-pattern>EdIface</url-pattern>
          </servlet-mapping>
          </web-app>
          When I try to access my http:\\server:port\testApp\test I get an "Error
          500 - internal server error".
          Has anyone had experice with deploying a java bean with jsut the .class and
          .jar file? Where should I put the .jar file?
          I appreciate any advice!


Bump

Problems with Java-Beans-Connectivity

Post Author: dweise
CA Forum: JAVA
I'm new in crystal reports and try to connect a sample bean class to the java beans conectivity. Problem is that i only get JavaServerType=JavaBeans|JavaBeanName= for selection. Can anyone tell me what the problem is with my configuration. I followed the steps of the POJOTutorial.doc and the Configuration-Infos of the java_beans_connectivity.My System is w2k professional and for Crystal Reports i use the developer installation with Product Version 11.5.0.313 Thanks by now

Post Author: pabhijit
CA Forum: JAVA
Could you send me the detailed steps and what point you are stucked.? I recently did something simillar and may be I would be able to help.

Problems with the ActiveX bridge for Java beans when using third-party .jar

I encountered the following problem when using the ActiveX bridge for a java bean:
I am using JDK 1.4.2_09 and MS Visual Basic 6.0 (SP6). I wrote a java bean called ProcessViewer (my class ProcessViewer inherits from JComponent and implements the interfaces Serializable and AdjustmentListener) which I would like to use within a VB 6.0 application. I used the ActiveX bridge (packager.exe) to generate a DLL (ProcessViewer.dll) and registered it successfully. The java bean GUI-control works fine within my VB 6.0 application unless my java bean (ProcessViewer.jar) uses any third-party .jar files.
But when I tried to add a reference to some third-party class (com.sap.xxx.xxx....) I got some problems. I could solve the problem with packager.exe by setting the correct CLASSPATH. But at runtime my VB 6.0 application does not work. It crashes or it reports an error like this: "The control ... could not be loaded from axbridge.dll" (although I deployed my .jar file correctly to the directory C:\Programme\Java\j2re1.4.2_09\axbridge\bin and lib). Setting the CLASSPATH environment variable before calling my VB 6.0 application (exe) did not solve the problem.
How can I teach my VB 6.0 application (containing the Java bean ActiveX control) where to find the third-party .jar file? Copying the third-party .jar file to the JRE lib-folder or to the axbridge\lib folder did not solve the problem either.
I studied the documentation about the ActiveX bridge given at:
http://java.sun.com/j2se/1.4.2/docs/guide/beans/axbridge/developerguide/index.html
but I am missing informations on how the third-party .jar files can be found during runtime of the ActiveX container (e. g. a VB 6.0 application).

See how to solve your problem with JNI:
http://codeproject.com/cpp/OOJNIUse.asp
More examples (for SWING) in tools setup:
http://www.simtel.net/product.php[id]95126[SiteID]simtel.net
http://www.simtel.net/product.php[id]94368[SiteID]simtel.net
http://www.simtel.net/product.php[id]93174[SiteID]simtel.net

Problem KeyEvent Java Bean (Francois Degrelle)

Hello !
I have a problem with the KeyEvent Java Bean (keykressed.zip)
from the Forms - PJC and JavaBean store !
1.
I call a forms-dialog and use the KeyEvent Java Bean.
(Set_Custom_Property('BL.BEAN',1,'INIT','')
2.
I call a second forms-dialog and use the KeyEvent Java Bean too.
Set_Custom_Property('BL.BEAN',1,'INIT','')
3.
Now i go back to the first forms-dialog and this dialog hangs...
(No input over keyboard possible !)
Maybe you can help me ?
Many thanks in advance !
Thomas

Hello,
Re-load the JAR file from the article.
I still get an error in the Java console after closing the second dialog, but the key is correctly sent to the first form, so it seems to be OK.
Francois

Java Bean Function problem

Hi All .
i just embeded a java bean into oracle forms it appear succesfully on the canvas now i want to execute the following function but unable to do so. Can u please explain me what i have to type where requested to call following function.
FUNCTION getDate(
obj ORA_JAVA.JOBJECT) RETURN ORA_JAVA.JOBJECT;
and the code i have on custom-trigger is
declare
newdate date;
begin
     newdate := JCALENDAR.getdate("WHAT to write here");
     if (newdate is not null) then
          :vhead.DTv := newdate;
     end if;
end;
Thanks in Advance
Message was edited by:
Fiz Dosani

Did you use the Java Importer to import the classes ?
>>yes i do
and i am also using a bean area & while looking your reply at the following thread i try to use fbean package for calling a function but the problem is that the getdate function return date and i didnot find invoke_date precedure in fbean package
Re: How to call java function in Oracle forms?

Problem while calling servlet from java bean

I am trying to call a servlet from java bean in cep.
My java bean:
package com.bea.wlevs.example.algotrading;
import com.bea.wlevs.ede.api.StreamSink;
import com.bea.wlevs.example.algotrading.event.MarketEvent;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.Unmarshaller;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.StringReader;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
public class MarketEventBean implements StreamSink {
     String s=null;
     public void onInsertEvent(Object event) {
          if (event instanceof MarketEvent) {
               MarketEvent marketEvent = (MarketEvent) event;
               try {
                    JAXBContext cxt = JAXBContext.newInstance(MarketEvent.class);
                    Unmarshaller unmarsh = cxt.createUnmarshaller();
                    StringReader strReader = new StringReader(marketEvent.getString_1());
                    MarketEvent obj = (MarketEvent) unmarsh.unmarshal(strReader);
                    s=obj.getSymbol();
                    System.out.println("data: " + s);
               } catch(Exception e) {
                    e.printStackTrace();
               try {
                    System.out.println("test1");
     URL url = new URL("http://172.18.21.94:7001/AppServletrecv-Model-context-root/ReceiveServlet");
     URLConnection conn = url.openConnection();
          System.out.println("test2");
     conn.setDoOutput(true);
          System.out.println("test3");
     BufferedWriter out =
     new BufferedWriter( new OutputStreamWriter( conn.getOutputStream() ) );
     out.write("symbol="+s);
          System.out.println("test4");
     out.flush();
     System.out.println("test5");
     out.close();
     System.out.println("test6");
     BufferedReader in =
     new BufferedReader( new InputStreamReader( conn.getInputStream() ) );
          System.out.println("test7");
     String response;
     while ( (response = in.readLine()) != null ) {
     System.out.println( response );
     in.close();
     catch ( MalformedURLException ex ) {
     // a real program would need to handle this exception
     catch ( IOException ex ) {
     // a real program would need to handle this exception
My servlet code:
package model;
import javax.servlet.http.HttpServlet;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class ReceiveServlet extends HttpServlet {
private final static String _SYMBOL = "symbol";
public void doPost(HttpServletRequest request, HttpServletResponse response) {
* Get the value of form parameter
// private final static String USERNAME = "username";
String symbol = request.getParameter( _SYMBOL );
* Set the content type(MIME Type) of the response.
response.setContentType("text/html");
* Write the HTML to the response
try {
PrintWriter out = response.getWriter();
out.println("<html>");
out.println("<head>");
out.println("<title> A very simple servlet example</title>");
out.println("</head>");
out.println("<body>");
out.println("<h1>Hello " + symbol +"</h1>");
out.println("</body>");
out.println("</html>");
out.close();
} catch (IOException e) {
Web.xml:
<?xml version = '1.0' encoding = 'windows-1252'?>
<web-app 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-app_2_5.xsd"
version="2.5" xmlns="http://java.sun.com/xml/ns/javaee">
<servlet>
<servlet-name>ReceiveServlet</servlet-name>
<servlet-class>model.ReceiveServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>ReceiveServlet</servlet-name>
<url-pattern>/ReceiveServlet</url-pattern>
</servlet-mapping>
</web-app>
My servlet is running in weblogic server.
But when I am running this program in weblogic server side there is no log.
Edited by: 856272 on Jun 23, 2011 6:43 AM

I would run both sides in a debugger and see what code is getting invoked

Implementing java beans in forms 10g [Problem]

Hi All,
I am trying to implement the java bean in the forms 10g
I performed the following steps, but no luck.. Could anybody please help me in this?
I have created a simple java class
package mypackage1;
public class MyClass
public String GetString(String a)
return a;
Make a jar myjar.jar out of it.
Copy this jar files in $ORACLE_HOME/forms/java directory
and set the archive.jini parameter in formsweb.cfg to
archive_jini=frmall_jinit.jar,Myjar.jar
Created a simple form having one button, one textbox
Set the implementation class property of text item to mypackage1.MyClass
on button pressed trigger, I wrote
set_custom_property('block2.text_item4',1,'GetString','Hello World');
Ideally, on button pressed, it should show the text "Hello World" in the etxt box. But on button pressed nothing is happening and in java console on error is appearing.
My java console output is
Loading http://asst104253:8889/forms/java/frmall_jinit.jar from JAR cache
Loading http://asst104253:8889/forms/java/Myjar.jar from JAR cache
proxyHost=null
proxyPort=0
connectMode=HTTP, native.
Forms Applet version is : 10.1.2.0
Could anyone please tell me what I am doing wrong?? And how do I achieve this functionality??
Please, any help appreciated !!

Hi there
The is plenty wrong with this code:
1. MyClass is not extending VBean
2. There is no public boolean setProperty(ID ID, Object args) method and no property IDs have been defined so set_custom_property('block2.text_item4',1,'GetString','Hello World'); will not execute anything
3. If you're hoping to return values back from the bean, you need to define a custom event and associated ID.
If you're just looking for some java code to return values in a similar manner as normal Oracle functions then you may want to consider using forms java stored procedures which are based on static java methods. Beans are really more for interaction type stuff with other applications.
But any way if you want to do it this way (i.e. using beans) then at very least you class should look something like (Note, I have not compiled is so there may be a few errors):
package mypackage1;
import oracle.forms.handler.IHandler;
import oracle.forms.ui.CustomEvent;
import oracle.forms.properties.ID;
import oracle.forms.ui.VBean;
import oracle.forms.engine.Main;
import oracle.forms.engine.*;
import oracle.forms.handler.*;
public class MyClass extends VBean
// initiating event id
protected static final ID pgetString = ID.registerProperty("GetString");
// return value id
private static final ID preturnValue = ID.registerProperty("returnValue");
// return event id
protected static final ID preturn = ID.registerProperty("returnEvent");
static IHandler mHandler;
public String GetString(String a)
// may do some string manipulation here.
return a;
public boolean setProperty(ID ID, Object args)
if (_ID== pgetString)
if (_args instanceof String)
String myArg = (String)_args;
mHandler.setProperty(preturnValue,getString(myArg));
CustomEvent ce = new CustomEvent(mHandler, preturn);
dispatchCustomEvent(ce);
Keep your button as is and then to return the value back into forms place a WHEN-CUSTOM-ITEM-EVENT trigger on the bean area with something like this:
DECLARE
     BeanValListHd1 PARAMLIST;
     ParamType NUMBER;
     EvenName     Varchar2(20);
     CurrentValue Varchar2(2000);
BEGIN
     BeanValListHd1 := get_parameter_list(:SYSTEM.CUSTOM_ITEM_EVENT_PARAMETERS);
     IF :SYSTEM.Custom_Item_Event = 'returnEvent' THEN
          IF iD_NULL(BeanValListHd1) THEN
          MESSAGE('NO PARAMETER FOUND FOUND');
          ELSE
          GET_PARAMETER_ATTR(BeanValListHd1,'returnValue',ParamType,CurrentValue);
          MESSAGE('IN CUSTOM EVENT THE STRING RETURNED IS '|| CurrentValue);
          END IF;
     ELSE
          MESSAGE('no value');
     END IF;
END;
hope this helps
Q

WDVisibility type paramter in Java Bean(Web Dynpro DC in CE 7.1)

Hi All,
I need to set a WDVisibility type paramter in a java bean and i am able to do so.It imports com.sap.tc.webdynpro.progmodel.api.WDVisibility class .
The problem is when i am creating a Java Bean model it is not allowing me to select the Java bean class it gives an error message" Invalid Class : No class files found for JavaBean : com/sap/tc/webdynpro/progmodel/api/WDVisibility".
The java Bean class exists in Web Dynpro DC>src folder.
Any Pointers?
Regards
Avinash

Hi Ondrej ,
Refer the above links to convert the component of the first dc as a public part.
Then declare the methods which are written in the component controller of the first DC in the interface controller with the same signature.( When method is called automatically component controller method is called)
In second dc in component controller properties tab add the reference of the first dc.
Then access the method in second dc as
wdthis.wdget<UsedComponent name>Interface.methodname();
Thanks & Regards,
Ardhendu

An error in jsp page useBean when i try to include the java bean package?

Hi Sir,
I am using import com.project.ShowData in java beans inorder to connect to the jsp.
The jsp code goes like this:-
<%@ page import="com.project.ShowData" %>
<jsp:useBean id="jspuser1" class="com.viman.ShowData" scope="session"/>
<jsp:setProperty name="jspuser1" property="*"/>
Here the error is showing as cannot resolve symbols in com.project.ShowData.But i have given the same in java beans like this:-
Package com.project;
//import of package goes here
public class ShowData
//code goes here
It seems that all are correct here.I have done few programs using this without any problem.But suddenly it is giving a problem like this.What is the problem here?It is quite Urgent.Thank u.
Regards,
m.ananthu

Greetings,
Here the error is showing as cannot resolve symbols in com.project.ShowData.But i have given the
same in java beans like this:-Seeing the actual error would be more helpful. ;)
Regards,
m.ananthu Regards,
Tony "Vee Schade" Cook

Java server page compiler can not find a class defined in a java bean file

I have a jsp file using java bean. The java bean class file is uploaded into the server and also the directory to this java bean .class file is included in the Unix environment CLASSPATH. This .jsp file is registered and should be compiled and excecuted automatically.
WHen I try to invoke this .jsp file, the jsp compiler error, saying the class defined by java bean can not be found. I already include this path in teh CLASSPATH, I thought the jsp compiler will go to the right place according to CLASSPATH to find the referenced class.
Can anyone tell me what I have done wrong or what should I do in order to allow jsp compiler to find the class refrenced by .jsp file and defined by java bean file?
Thank you so much

hello friends,
i am also facing the same problem of not finding bean class files for both jsp and servlet though it is placed in same package. the problem of not finding bean class file for jsp is experienced in Tomcat server only whereas in Blazix, there is no such error and the file is compiled and runs successfully.
i have checked Tomcat properly. there is no error in its configuration also servlets without the use of bean files run successfully. so please can anybody guide me about what is the problem and how to solve it. plz its urgent .

Context mapping vs. Java beans

Hi,
I'm making a "Server" Component (Java Web Dynpro) that exposes a view to other "Client" Components (other Java Web DynPros). The Clients can insert the exposed view into their views to use the Server's services.
The Server, obviously, has to be initialized with specific data from the Client.
At first I thought of creating a context node in the Server, structured with all the attributes needed for its configuration, and then expose that node in the interface. In this way the Client creates a local copy of that node via node mapping and then populates its attributes with values. Once the client populates it in its wdDoInit() method, the embedded view's wdDoInit() method is called and the Server's View can initialize itself.
Now, instead, I was considering using Java Beans (a class that wraps all the data that I've currently put in the context) because:
1- The Client should not be able to alter the Server's configuration once it has been initialized. With context mapping the Client can alter at runtime the configuration node's content.
2- The Server configuration has to be shared between multiple Server's views. When passing a configuration NodeElement as argument to methods shared between views, I've always the problem that I have to deal with the type of the NodeElement (the public interface of the component controller, the private interfaces of the views).
What is the right way to do things in this scenario?
Thanks to anyone who drops an answer,
See you,
Pietro
PS. If it's unclear, let me know!

You can implement some inteface at server,
declare usage of this interface at client.
then,
you can initalise server component by getting that interface from server component,
and calling methods with desired objects as arguments.
other methods of this interface can be used to return server's configuration,
so it will be shared.

"Java-Bean: True" missing after being packed in jar file

Hi All
X86, Windows XP Professional, J2SDK 1.4.2
I complied a section of code ", which is from << Thinking In Java>>(3rd).
Created a manifest file "BangBean.tmp"
<<
Name: bangbean/BangBean.class
Java-Bean: True
>>
And then packed class files into "BangBean.jar" with command
"jar cfm BangBean.jar Bang BangBean.tmp bangbean".
It's puzzling that "Java-Bean: Ture" was missing in the "BangBean.jar/META-INF/MENIFEST.MF" .
<<
Manifest-Version: 1.0
Created-By: 1.4.2 (Sun Microsystems Inc.)
Name: bangbean/BangBean.class
>>
What's more, after altering the"BangBean.tmp" into this
<<
Java-Bean: True
Name: bangbean/BangBean.class
>>
and had a another try.
I got a jar file with such MENIFEST.MF.
<<
Manifest-Version: 1.0
Created-By: 1.4.2 (Sun Microsystems Inc.)
Java-Bean: True
Name: bangbean/BangBean.class
>>
This jar file worked well in BDK's beanbox.
I've test it with JSDK 1.5.0, the same thing happened.
And I didn't encounter such problem in other bean programs.
I've searched " 'Java-Bean: True' missing " with google, but didn't get proper answers.
Is there anybody who can give a prompt about why this happend?
Thanks a lot for your help!
code
//: bangbean:BangBean.java
// A graphical Bean.
package bangbean;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.util.*;
import com.bruceeckel.swing.*;
public class
BangBean extends JPanel implements Serializable {
private int xm, ym;
private int cSize = 20; // Circle size
private String text = "Bang!";
private int fontSize = 48;
private Color tColor = Color.RED;
private ActionListener actionListener;
public BangBean() {
addMouseListener(new ML());
addMouseMotionListener(new MML());
public int getCircleSize() { return cSize; }
public void setCircleSize(int newSize) {
cSize = newSize;
public String getBangText() { return text; }
public void setBangText(String newText) {
text = newText;
public int getFontSize() { return fontSize; }
public void setFontSize(int newSize) {
fontSize = newSize;
public Color getTextColor() { return tColor; }
public void setTextColor(Color newColor) {
tColor = newColor;
public void paintComponent(Graphics g) {
super.paintComponent(g);
g.setColor(Color.BLACK);
g.drawOval(xm - cSize/2, ym - cSize/2, cSize, cSize);
// This is a unicast listener, which is
// the simplest form of listener management:
public void addActionListener(ActionListener l)
throws TooManyListenersException {
if(actionListener != null)
throw new TooManyListenersException();
actionListener = l;
public void removeActionListener(ActionListener l) {
actionListener = null;
class ML extends MouseAdapter {
public void mousePressed(MouseEvent e) {
Graphics g = getGraphics();
g.setColor(tColor);
g.setFont(
new Font("TimesRoman", Font.BOLD, fontSize));
int width = g.getFontMetrics().stringWidth(text);
g.drawString(text, (getSize().width - width) /2,
getSize().height/2);
g.dispose();
// Call the listener's method:
if(actionListener != null)
actionListener.actionPerformed(
new ActionEvent(BangBean.this,
ActionEvent.ACTION_PERFORMED, null));
class MML extends MouseMotionAdapter {
public void mouseMoved(MouseEvent e) {
xm = e.getX();
ym = e.getY();
repaint();
public Dimension getPreferredSize() {
return new Dimension(200, 200);
} ///:~
************************************************

Since you didn't use code-formatting tags ([ code ] and [ /code ] without the spaces) it's kinda hard to look at it. But I'm sure it DID execute much more than just the return statement - maybe you're not closing a file or db connection, or maybe you're seeing a cached page, so it actually isn't executing ANYTHING on the server (is your browser set to never check for newer pages so it (almost) always returns from cache, for example?)

How to pass a populated Java bean to a jsp

Hi,
I'm new to J2EE world. I want to know how should I pass a populated Java Bean (not EJB) to a JSP without displaying that JSP in the next step. I would be much grateful to anyone who gives a solution to my problem.
Thanks in advance
With best regards
Sampath

> I'm new to J2EE world. I want to know how should I
pass a populated Java Bean (not EJB) to a JSP without
displaying that JSP in the next step.
Urk?
A JSP is meant to be displayed. If there's business logic in that JSP, get it out of there. Process the bean as needed on the server side and send the flow on to some view that actually should be displayed.
~

Java Bean Problem

Similar Messages

Maybe you are looking for