Calling Classes From JSP pages

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

Put it in WEBLOGICCLASSPATH variable. And make sure it is only in
          WEBLOGICCLASSPATH , nowhere else.
          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
          >
          >
          >

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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?

How to load java class from jsp page?

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?
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<applet code=helloApplet.class width=100 height=100>
</applet>
but, how to open java class which is an application made by Frame?
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Calling Beans from JSP page

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.
Note: I am using tomcat server and my jsp and servlet files are running seccessfuly, there is any special change in classpath for java beans? if any please tell
My jsp file is in tomcat-->webapps-->jsp--><my file>
My bean (*.class) file-->webapps-->Root-->web-inf-->classes--><my file>
Pleae help me for the above problem.
Mubashar ([email protected])

According to J2EE standards:
The web appl directory structure should be:
WebAppRootDirectory
|
|---html, jsp, images etc
|
|---WEB-INF---
|---classes--
|---lib
|
|
1) Make sure WEB-INF is in capital letters
2) Place all ur beans in classes dir or sub-directory in
classes
3) In Tomcat place WebAppRootDirectory in webapps
directory
[email protected]

How to call Servlet from jsp page and how to run this app using tomcat..?

Hi ,
I wanted to call servlet from jsp action i.e. on submit button of JSP call LoginServlet.Java file.
Please tell me how to do this into jsp page..?
Also i wanted to execute this application using tomcat.
Please tell me how to do this...? what setting are required for this...? what will be url ..??
Thanks.

well....my problem is as follows:
whenever i type...... http://localhost:8080/appName/
i am getting 404 error.....it is not calling to login.jsp (default jsp)
but when i type......http://localhost:8080/appName/login.do........it executes servlet properly.
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In short can anyone please tell me how to diaplay jsp page using tomcat 5.5
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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:
C:\Program Files\Apache Tomcat 4.0\work\Standalone\localhost\em\jsp\Test_0005fSummarySBU_0005fscreen$jsp.java:77: Class org.apache.jsp.ListReturn not found.
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).
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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
2. included the package statement in the java file for the bean
3. included an empty constructor in the java file for the bean
4. I have declared the above constructor as public (is this necessary?)
5. used the full package name:
kolaPackage.kolaBean bakedBean = new kolaPackage.kolaBean();
6. imported import java.beans.*; (is this necessary ?)
7. still got the same error...
Any pointers really really appreciated
Thanks
Kola

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

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
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Does that not work either?

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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
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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; %>
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ws = DTO.workSheet(day);
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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
Under which reside the classes

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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.
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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

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

Hi everybody.
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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)
3 errors
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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:
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Wot all ways are there to call servlet from jsp

hi all
i want to know wot all methods are available
so that i can call servlet from jsp
the one which i know is using RequestDispatcher
wot are others ?
thanx

hi all
i want to know wot all methods are available
so that i can call servlet from jsp
the one which i know is using RequestDispatcher
wot are others ?
thanxhi here are few ways... to call servlet from jsp...
these are just generic syntax.
Form:
<form action="ServletPath">
Link:
Directives & Action tags :
<%@ page import="ServletPath" %>
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hope you got your answer.
regards,
immu

Calling JApplet from jsp

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use the jsp:plugin tag like this in your jsp page..
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Calling Classes From JSP pages

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