IllegalAccessError trying to instantiate public class from JSP page

I have a public class called UrlHolderClient located in both
WEB-INF/classes/UrlHolderClient.class and
WEB-INF/lib/urlholder.jar.
This client class is used as a wrapper class around a simple ejb which holds urls. I have a JSP which tries to create an instance of UrlHolderClient in jspInit(), but the call to the constructor throws a java.lang.IllegalAccessError. I have no idea what the problem is here. I import the classes using the page directive.
Any suggestions?

Is this tomcat you are deploying on or some other App Server?
Also, you reference JspInit(), have you tried instanting in
Scriplet Code <% UrlHolderClient urlHolderClient = new UrlHolderClient() %>
Does that not work either?

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hi all!
Does anyone know how to load java class from jsp page?
I try to load java class from jsp page.
Is it possible to load java class fom jsp page?
thanks and have a good day!

What I mean is How to load/open java class file from jsp page?
I think we can open Applet from jsp page by using
<applet code=helloApplet.class width=100 height=100>
</applet>
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Calling java class from jsp page

Dear Friends.
I wrote jsp page and java class.
Am calling java class from jsp page. after processing result,
I have to refresh jsp page from java class.
processing time may take 5 minutes or 1 minute etc. that depends on user.
Can It be possible ? if possible , How ?

Ok, I get a very strange error now:
org.apache.jasper.JasperException: Unable to compile class for JSPerror: An error has occurred in the compiler; please file a bug report (http://java.sun.com/cgi-bin/bugreport.cgi).
What is this??? Anyone?

Cant find bean class from jsp page using Tomcat 4

Hi
I have searched numerpus forums and seen many posts from people who seem to have the same problem however none of the solutions seem to work for me.
I have a jsp page which is trying to call a bean method however I get an error
saying that the class for the bean cannot be found. I have :
1. put the class in a package called kolaBean under
C:\Program Files\Apache Tomcat 4.0\webapps\ROOT\begjsp-ch01\WEB-INF\classes\kolaPackage
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3. included an empty constructor in the java file for the bean
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5. used the full package name:
kolaPackage.kolaBean bakedBean = new kolaPackage.kolaBean();
6. imported import java.beans.*; (is this necessary ?)
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in reply to David Rons email:
Is this a fresh install of tomcat? If so, it could be a configuration
problem.Yes it is
Is the class public in the package (I forget that all the time)?Yes it is. I have also declared the constructor to be public is this
necessary?
What's the error message?here is the error message:
An error occurred between lines: 11 and 14 in the jsp file:
/begjsp-ch01/kolaBean.jsp
Generated servlet error:
C:\Program Files\Apache Tomcat
4.0\work\localhost\_\begjsp-ch01\kolaBean$jsp.java:59: Class
kolaPackage.kolaBean not found.
kolaPackage.kolaBean bakedBean = new
kolaPackage.kolaBean();
^
2 errors
Thanks in advance
Kola

Calling my Java class from JSP page

Hello, I am trying to call my Java class from my JSP page passing parameters to it and getting back a collection of result sets. Can someone tell me what I might be doing wrong:
JSP code to call Java class:
<%
String strEssUser = "test";
String strProcessingMonth = "JUL";
String strProcessingYear = "2002";
strQueryList=new ListReturn(strEssUser.toString(), strProcessingMonth.toString(), strProcessingYear.toString());
%>
I get this error when I try to run this JSP page using tomcat:
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strQueryList=new ListReturn(strEssUser.toString(), strProcessingMonth.toString(), strProcessingYear.toString());
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Ok, I get a very strange error now:
org.apache.jasper.JasperException: Unable to compile class for JSPerror: An error has occurred in the compiler; please file a bug report (http://java.sun.com/cgi-bin/bugreport.cgi).
What is this??? Anyone?

Calling Classes From JSP pages

I am importing an application specific class in a JSP page and calling it
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          Regards,
          Pradeep


Put it in WEBLOGICCLASSPATH variable. And make sure it is only in
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          Cheers - Wei
          John Brown <[email protected]> wrote in message
          news:39693f9e$[email protected]..
          > I am importing an application specific class in a JSP page and calling it
          > (Win NT). It compiles the servlet successfully but cannot appear to find
          the
          > class during execution.
          > I have tried placing the class file / jar file containing the class in
          > CLASSPATH environment / weblogic JAVAPATH variable / weblogic
          ServletClasses
          > directory .. so far without any luck.
          > I would appreciate any suggestions.
          >
          > Regards,
          >
          > Pradeep
          >
          >
          >

Trying to trigger a servlet from .jsp page on combo box change

I have a jsp page with two combo boxes ( single select ).
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The country servlet successfully connects to the database and retrieves all countries
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However, the populating of the city combo box depends on what country
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ResultSet rs;
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Country combo box. i.e.:
<option value="5">Portugal</option>
If it's not possible to retrieve the value property from the option,
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So to reiterate, I need the City servlet to be called into action
any time a different country is selected in the country combo box.
I'm a newbie to jsp & servlets, so any suggestions much appreciated.
Edited by: Irish_Fred on Jan 20, 2010 4:29 AM

Cheers, I came up with a solution using Ajax, where I didn't have to change
anything in my servlets and only had to make minor changes to my jsp page.
I didn't want to use any javascript in my web app, but I guess Ajax
has addressed the issue of cross platform independence.

Using java class from JSP page

I have a class that connects to the database and return the result in form of array of objects, now I wrote a tester and I was able to print the result on the console but when it came to JSP how can I use this class I am a bit confused, how can I declare an array of objects and save the result that comes from the class method
note: my class is not a bean it is a service class that contain methods to retreive different information from the database.
I would apritiate any help but please make it in sequence for example declaring an array to hold the result then call the method that returns the array of objects..etc
please help, I am really confused and don't know what to write
thank you

You can access a class in the same way as a bean, after all a bean is just a class that follows a set of rules.
You need to put your classes in packages to access them.
I have 2 packages, params and DTO. I set the class that returns the Data Transfer Object, or array of objects up as I would a bean
<jsp:useBean id="DTO" scope="request" class="params.DTO" />
I think you skip the above declaration and access it directly in code using
params.DTO();
but setting it up as I would a bean allows me to simply use
DTO();
DTO is the class that passes back the array of objects.
Objects themselves I have in a seperate package, also called DTO (sorry if this is confusing, made sense at the time :-) ) You dont need them in seperate packages, just helped me keep DTO objects seperate from business logic classes......
Now before I use params.DTO() I declare a variable of the Object type DTO() returns
<%! DTO.workSheet[] ws; %>
So, ws is the object type that will be returned by params.DTO()
Then to get my array of objects back from params.DTO() :-
ws = DTO.workSheet(day);
or if you dont like the bean declaration
ws = params.DTO.workSheet(day);
You need to put your packages under WEB-INF/Classes when using Tomcat
So I have
Tomcat 5.0\webapps\myApplication\WEB-INF\classes\params
Tomcat 5.0\webapps\myApplication\WEB-INF\classes\DTO
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How to instantiate a .class from a JSP?

Hi,
probably it's a simple problem, byt I'm new in JSP and I couldn't work it out.
I'm converting a SSJS Netscape Application to JSP. My needing is to write a Java .class containing only static methods, to call them from the JSP pages.
For trying, I wrote a simple class that I call from a JSP page, but I get this error:
Error: 500
Location: /JSP24H/cap01/Simple2.jsp
Internal Servlet Error:
org.apache.jasper.JasperException: Unable to compile class for
JSPC:\tomcat\work\localhost_8080%2FJSP24H\_0002fcap_00030_00031_0002fSimple_00032_0002ejspSimple2_jsp_0.java:80:
Incompatible type for =. Can't convert void to java.lang.String.
v = GenFunction.messaggio();
^
This is the JSP instantiating the Java class:
<HTML>
<HEAD><TITLE>A Simple JSP</TITLE></HEAD>
<BODY>
<FONT COLOR="blue" FACE="Trebuchet">
<CENTER>
<%@ page import = "GenFunction" %>
<% out.println("My name is Charly !" + "<br>"); %>
<%
String v = " ";
v = GenFunction.messaggio();
out.println( v );
%>
</CENTER>
</FONT>
</BODY>
</HTML>
And this is the class instantiated from JSP:
public class GenFunction {
public static void main (String args[]) {
public static String messaggio() {
String a;
a = " Hello world !";
return a;
In order to be sure about what I'm doing, I opened a DOS window and I called the class within the following:
public class call_Class {
public static void main (String args[])
String v;
GenFunction x = new GenFunction();
v = x.messaggio();
System.out.println(v);
When I instantiate the class from DOS it's all right, why not from JSP. It seems to be returning a void value (I tried with casting too but without success).
Thanks !

Do you have multiple versions of classes in the server CLASSPATH somehwhere? If you have changed the class, and not bounced the server, try bouncing the server(may be using cached class)
-Mak

Calling WEB-INF/lib/.Jar class from JSP

Hi everybody.
I have a problem about calling my jar file class from JSP .My development plotform is WSAD 5.1.2 and application server : WebSphere Test Server 5.1.This is the my server console error:
error: IO exception sun.io.MalformedInputException
D:\Projeler\Mustafa Yilmaz\WFR\WTIREAR\WTIRSD.jar(dvo/utb_part_tai_tool_code_bilgi_DVO.java):4: cannot access ortak.dvo.AnaDvo
bad class file: D:\Projeler\Mustafa Yilmaz\WFR\WTIREAR\ERPOrtak.jar(ortak/dvo/AnaDvo.java)
file does not contain class ortak.dvo.AnaDvo
Please remove or make sure it appears in the correct subdirectory of the classpath.
(source unavailable)
3 errors
]: org.apache.jasper.JasperException: Unable to compile class for JSP
D:\Projeler\Mustafa Yilmaz\WFR\WTIREAR\WTIRSD.jar(dvo/utb_part_tai_tool_code_bilgi_DVO.java):8: class utb_part_tai_tool_code_bilgi_DVO is public, should be declared in a file named utb_part_tai_tool_code_bilgi_DVO.java
(source unavailable)
error: IO exception sun.io.MalformedInputException
D:\Projeler\Mustafa Yilmaz\WFR\WTIREAR\WTIRSD.jar(dvo/utb_part_tai_tool_code_bilgi_DVO.java):4: cannot access ortak.dvo.AnaDvo
bad class file: D:\Projeler\Mustafa Yilmaz\WFR\WTIREAR\ERPOrtak.jar(ortak/dvo/AnaDvo.java)
file does not contain class ortak.dvo.AnaDvo
Please remove or make sure it appears in the correct subdirectory of the classpath.
(source unavailable)
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can you help me ?

class utb_part_tai_tool_code_bilgi_DVO is public,
should be declared in a file named utb_part_tai_tool_code_bilgi_DVO.java...
cannot access ortak.dvo.AnaDvo bad class file:
D:\Projeler\Mustafa Yilmaz\WFR\WTIREAR\ERPOrtak.jar(ortak/dvo/AnaDvo.java)
file does not contain class ortak.dvo.AnaDvoThe error messages say it all. Rename the .java files so that they match the class names. Then recompile and repack the JAR file.

Can not call bean class from JSp/Tomcat 5.5

hello everyone...
i m using one bean class Parser which is called by discussion.jsp page. i put class file in webapps/grid/WEB-INF/classes and JSP page is in webapps/grid/. The whole combination is working fine for tomcat 3.3.2 but not working properly in tomcat 5.5.
Error is as follow...
org.apache.jasper.JasperException: Unable to compile class for JSP
An error occurred at line: 38 in the jsp file: /discussion.jsp
Generated servlet error:
Parser cannot be resolved or is not a typeplease help me....
Thank in Advance

You still need to import the class from the default package. As a word of advice you should put the class in a package. The later versions of Tomcat do not play well with bean classes that are not in packages.

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hi,
I tried to my best to call java beans from JSP page but it generate error that "unable to load class....", please help me that in which directory jsp file and bean *.class file reside, currently my setting are as follows.
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According to J2EE standards:
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classes
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directory
[email protected]

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I want to insert data into a database table from JSP page using Entity Beans(EJB 3.0).
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Hi sir
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Well, you wouldn't do it in Java. You would do it in JSTL, preferably.
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IllegalAccessError trying to instantiate public class from JSP page

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