Simple JSP example problems

Hello, I am new to JSP and I was wondering if I could get some help from some people that know what they are doing. I'm trying to run a simple JSP example that I got out of a book. But I've modified it a bit to just play around with it. But it doesn't want to run. I'm starting to think it's something wrong with the way I'm building/installing the stuff. I'm running IBM WebSphere 4 and JBuilder 8. I was just wondering if you could look at my code just to make sure I'm doing this right.
It's a pretty simple example. A JSP calls a class to get a message to print out.
Here's the code for the class: (HelloWorld.java)
package helloworld;
public class HelloWorld
private String message = "No message specified";
public String getMessage()
return(message);
public void setMessage(String message)
this.message = message;
=================================================================
Here's the code for the JSP: (HelloWorld.jsp)
<html>
<head>
<title>Using JavaBeans with JSP</title>
</head>
<body>
<jsp:useBean id="helloWorld" class = "helloworld.HelloWorld" />
<ol>
<li>Initial Value (JSP Expression):
<%= helloWorld.getMessage() %></li>
<li><jsp:setProperty name="helloWorld"
property="message"
value="Hello World" />
Value after setting property with setProperty:
<jsp:getProperty name="helloWorld"
property="message" /></li>
</ol>
</body>
</html>
I just wanted to be able to test out a JSP hitting a class file. Does someone have a better/easier way to do this? Or do you see anything wrong with my example? Thanks in advance.

The 1 thing missing in your example is the import directive for the helloworld.HelloWorld class.
Add the following line somewhere around the start of your jsp and things should be fine
<%@ page import="helloworld.HelloWorld" %>
Cheers

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<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by Mona Marathe ([email protected]):
Hello!
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The above error message is likely due
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news:[email protected]..
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<?xml version="1.0" encoding="ISO-8859-1"?>
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"http://java.sun.com/j2ee/dtds/web-app_2_2.dtd">
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Employing a descendent of the Action class that does not implement the perform() method while using the Struts 1.0 libraries. Struts 1.1 Action child classes started using execute() rather than perform(), but is backwards compatible and supports the perform() method. However, if you write an Action-descended class for Struts 1.1 with an execute() method and try to run it in Struts 1.0, you will get this "Document contained no data" error message in Netscape or a completely empty (no HTML whatsoever) page rendered in Microsoft Internet Explorer.
Also check this URL http://www.geocities.com/Colosseum/Field/7217/SW/struts/errors.html

Re: [iPlanet-JATO] sp3 jsp compiler problem

Weiguo,
First, Matt is correct, the regular expression tool is perfect for general text
substitution situations, and as a completely independent tool its use is not
restricted to migration situations (or file types for that matter).
Second, I sympathize with the unfortunate trouble you are experiencing due to
Jasper's (perhaps more strict) compilation, but in what way did the iMT
automated translation contribute to these inconsistencies that you cited?
1. Changed the case of the tag attribute to be the same as what's
defined in tld.
example: changed OnClick to onClick
The iMT does not generate any OnClick or onClick clauses per se. In a
translation situation, the only way "OnClick" would have been introduced was if
it had been part of the pre-existing project's "extraHTML" (which was written
by the original customer and just passed through unchanged by the iMT) or if it
was added manually by the post-migration developer.
2. Removed attributes which are not defined in tld.
example: escape attribute only defined in three tags
but in some pages, it's used although it's not defined as an
attribute
of certain tags. The jasper compiler doesn't like it.Can you give soem examples? Is there a definite pattern? Again, this might be
similar to the OnClick situation described above?
3. In an end tag, there can't be any space.
example: </content > doesn't work. </content> works.
Again, the content tag would never have been generated by the iMT. There was no
equivalent in the NetDynamics world, so any content tags in your code must have
been introduced by your developers manually. Its a shame that jasper is so
particular, but the iMT could not help you out here even if we wanted to. The
constants that are used by the iMT are defined in
com.iplanet.moko.jsp.convert.JspConversionConstants. From what I can see, the
only situation of a closing tag with any space in it is
public static final String CLOSE_EMPTY_ELEMENT = " />";
But that should not cause the type of problem you are referring to.
Mike
----- Original Message -----
From: Matthew Stevens
Sent: Thursday, September 06, 2001 10:16 AM
Subject: RE: [iPlanet-JATO] sp3 jsp compiler problem
Weiguo,
Others will chime in for sure...I would highly recommend the Regex Tool from
the iMT 1.1.1 for tackling this type of problem. Mike, Todd and myself have
posted to the group (even recently) on directions and advantages of creating
your own RULES (rules file) in XML for arbitary batch processing of source.
matt
-----Original Message-----
From: weiguo.wang@b...
[mailto:<a href="/group/SunONE-JATO/post?protectID=125056020108194190033029175101192165174144234026000079108238073194105057099246073154180137239239223019162">weiguo.wang@b...</a>]
Sent: Thursday, September 06, 2001 12:25 PM
Subject: [iPlanet-JATO] sp3 jsp compiler problem
Matt/Mike/Todd,
We are trying to migrate to sp3 right now, but have had a lot of
issues with the new jasper compiler.
The following workaround has been employed to solve the issues:
1. Changed the case of the tag attribute to be the same as what's
defined in tld.
example: changed OnClick to onClick
2. Removed attributes which are not defined in tld.
example: escape attribute only defined in three tags
but in some pages, it's used although it's not defined as an
attribute
of certain tags. The jasper compiler doesn't like it.
3. In an end tag, there can't be any space.
example: </content > doesn't work. </content> works.
As I see it, we have two options to go about solving this problem:
1. Write a script which will iterate through all the jsp files and
call jspc on them. Fix the errors manually when jspc fails. Jspc will
flag the line number where an error occurs.
2. Write a utility which scans the jsp files and fix the errors when
they are encountered. We should define what's an error and how to
correct it. It's best if we combine this with solution 1 since we
might miss an error condition.
Actually, there might be another option, which is seeking help from
you guys since you have better understanding of JATO and iAS. Can you
do anything to help us?
We would be happy to hear your thoughts.
At last, I would like to suggest modifying the moko tool so that
these rules are enforced and the generated JSPs work with the new
compiler. This is for the benefit of any new migration projects.
Thanks a lot.
Weiguo
[email protected]
Choose from 1000s of job listings!
[email protected]
[Non-text portions of this message have been removed]

Thanks a lot Matt and Mike for your prompt replies.
I agree completely that iMT doesn't introduce the inconsistencies.
About the three cases I mentioned, the third one happens only in
manually created JSPs. So it has nothing to do with iMT. The first
two are mainly due to the existing HTML code, as you rightly pointed
out.
The reason I made the suggestion is since we know that case 1 and 2
won't pass the japser compiler in sp3, we have to do something about
it. The best place to do this, in my mind, is iMT. Of course, there
might be some twists that make it impossible or difficult to do this
kind of case manipulation or attribute discard.
Weiguo
--- In iPlanet-JATO@y..., "Mike Frisino" <Michael.Frisino@S...> wrote:
Weiguo,
First, Matt is correct, the regular expression tool is perfect for general text substitution situations, and as a completely independent
tool its use is not restricted to migration situations (or file types
for that matter).
>
Second, I sympathize with the unfortunate trouble you are experiencing due to Jasper's (perhaps more strict) compilation, but
in what way did the iMT automated translation contribute to these
inconsistencies that you cited?
>
1. Changed the case of the tag attribute to be the same as what's
defined in tld.
example: changed OnClick to onClick
The iMT does not generate any OnClick or onClick clauses per se. In a translation situation, the only way "OnClick" would have been
introduced was if it had been part of the pre-existing
project's "extraHTML" (which was written by the original customer and
just passed through unchanged by the iMT) or if it was added manually
by the post-migration developer.
>
2. Removed attributes which are not defined in tld.
example: escape attribute only defined in three tags
but in some pages, it's used although it's not defined as an
attribute
of certain tags. The jasper compiler doesn't like it.Can you give soem examples? Is there a definite pattern? Again, this might be similar to the OnClick situation described above?
>
>
3. In an end tag, there can't be any space.
example: </content > doesn't work. </content> works.
Again, the content tag would never have been generated by the iMT. There was no equivalent in the NetDynamics world, so any content tags
in your code must have been introduced by your developers manually.
Its a shame that jasper is so particular, but the iMT could not help
you out here even if we wanted to. The constants that are used by the
iMT are defined in
com.iplanet.moko.jsp.convert.JspConversionConstants. From what I can
see, the only situation of a closing tag with any space in it is
public static final String CLOSE_EMPTY_ELEMENT = " />";
But that should not cause the type of problem you are referring to.
Mike
----- Original Message -----
From: Matthew Stevens
Sent: Thursday, September 06, 2001 10:16 AM
Subject: RE: [iPlanet-JATO] sp3 jsp compiler problem
Weiguo,
Others will chime in for sure...I would highly recommend the Regex Tool from
the iMT 1.1.1 for tackling this type of problem. Mike, Todd and myself have
posted to the group (even recently) on directions and advantages of creating
your own RULES (rules file) in XML for arbitary batch processing of source.
>
matt
-----Original Message-----
From: weiguo.wang@b...
[mailto:<a href="/group/SunONE-JATO/post?protectID=125056020108194190033029175101192165174048139046">weiguo.wang@b...</a>]
Sent: Thursday, September 06, 2001 12:25 PM
Subject: [iPlanet-JATO] sp3 jsp compiler problem
Matt/Mike/Todd,
We are trying to migrate to sp3 right now, but have had a lot of
issues with the new jasper compiler.
The following workaround has been employed to solve the issues:
1. Changed the case of the tag attribute to be the same as
what's
defined in tld.
example: changed OnClick to onClick
2. Removed attributes which are not defined in tld.
example: escape attribute only defined in three tags
but in some pages, it's used although it's not defined as an
attribute
of certain tags. The jasper compiler doesn't like it.
3. In an end tag, there can't be any space.
example: </content > doesn't work. </content> works.
As I see it, we have two options to go about solving this problem:
>>
1. Write a script which will iterate through all the jsp files and
call jspc on them. Fix the errors manually when jspc fails. Jspc will
flag the line number where an error occurs.
2. Write a utility which scans the jsp files and fix the errors when
they are encountered. We should define what's an error and how to
correct it. It's best if we combine this with solution 1 since we
might miss an error condition.
Actually, there might be another option, which is seeking help from
you guys since you have better understanding of JATO and iAS. Can you
do anything to help us?
We would be happy to hear your thoughts.
At last, I would like to suggest modifying the moko tool so that
these rules are enforced and the generated JSPs work with the new
compiler. This is for the benefit of any new migration projects.
Thanks a lot.
Weiguo
[email protected]
Choose from 1000s of job listings!
[email protected]
Service.
>
>
>
[Non-text portions of this message have been removed]

How do I expand my simple JSP page to implement Connection Pooling?

Hi everyone,
I have a small SQL database which contains information about Students and a StudenBean which contains their attributes and appropriate get/set methods (which I haven't needed to use yet).
I want to write a simple JSP page which displays all the students details in one big table. I can do this using the basic prototyping method of adding the dataSource and driver details to the deployment descriptor (web.xml - I'm using the latest version of Tomcat by the way) and then accessing the database using JSP standard SQL actions.
Here's a snipet of what I've done (just an example, the final code works):
<sql:query var="temp"
sql="SELECT * FROM Employee ORDER BY UserName"
/>
<c:forEach items="${temp.rows}" var="row">
<td><c:out value ="${row.UserName}"/></td>
<td><c:out value ="${row.FirstName}"/></td>
<td><c:out value ="${row.LastName}"/></td>
Now I want to upgrade! I want to access the dataSource using Connection Pooling and it's causing me a lot of trouble. I already have the required working classes/data such as ConnectionPool.java, ResourceManagerListener.java, the MySQL driver etc.
However, I don't know what the best way to setup the connection for my purposes would be and where I should do it.
Do I need to write a servlet or tag handler/custom action to establish the connection and access my bean through it? I would like to keep a similar sort of business logic as I already have developed i.e. be able to use actions in my JSP page to cycle through the database and print out each detail from the row.
Rather confused and muddled. Thanks for any input!

Good idea.
Set up a JNDI data source for your app, according to these docs:
http://jakarta.apache.org/tomcat/tomcat-4.1-doc/jndi-datasource-examples-howto.html
You'll have to put the right information into your web.xml and a context.xml. Once you've done that, your JSTL JSPs will simply use the connection resource automagically.
MOD

My simple jsp doesn't work: hhhelp

hello i'm new to java.
I'm testing a simple jsp with a javabean: Fruit.class
When i test it , it seems there is a problem of package (but i really need help on this)...
Here's the error i get:
C:\jakarta-tomcat-5.0.19\work\Catalina\localhost\_\org\apache\jsp\confirm_jsp.java:44: cannot resolve symbol
symbol : class Fruit
location: class org.apache.jsp.confirm_jsp
Fruit commandeFruit = null;
^
here's the full error report
Etat HTTP 500 -
type Rapport d'exception
message
description Le serveur a rencontr� une erreur interne () qui l'a emp�ch� de satisfaire la requ�te.
exception
org.apache.jasper.JasperException: Impossible de compiler la classe pour la JSP
Une erreur s'est produite � la ligne: 2 dans le fichier jsp: /confirm.jsp
Erreur de servlet g�n�r�e:
    [javac] Compiling 1 source file
C:\jakarta-tomcat-5.0.19\work\Catalina\localhost\_\org\apache\jsp\confirm_jsp.java:44: cannot resolve symbol
symbol : class Fruit
location: class org.apache.jsp.confirm_jsp
      Fruit commandeFruit = null;
      ^
Une erreur s'est produite � la ligne: 2 dans le fichier jsp: /confirm.jsp
Erreur de servlet g�n�r�e:
C:\jakarta-tomcat-5.0.19\work\Catalina\localhost\_\org\apache\jsp\confirm_jsp.java:46: cannot resolve symbol
symbol : class Fruit
location: class org.apache.jsp.confirm_jsp
        commandeFruit = (Fruit) _jspx_page_context.getAttribute("commandeFruit", PageContext.PAGE_SCOPE);
                         ^
Une erreur s'est produite � la ligne: 2 dans le fichier jsp: /confirm.jsp
Erreur de servlet g�n�r�e:
C:\jakarta-tomcat-5.0.19\work\Catalina\localhost\_\org\apache\jsp\confirm_jsp.java:48: cannot resolve symbol
symbol : class Fruit
location: class org.apache.jsp.confirm_jsp
          commandeFruit = new Fruit();
                              ^
Une erreur s'est produite � la ligne: 16 dans le fichier jsp: /confirm.jsp
Erreur de servlet g�n�r�e:
C:\jakarta-tomcat-5.0.19\work\Catalina\localhost\_\org\apache\jsp\confirm_jsp.java:71: cannot resolve symbol
symbol : class Fruit
location: class org.apache.jsp.confirm_jsp
      out.write(org.apache.jasper.runtime.JspRuntimeLibrary.toString((((Fruit)_jspx_page_context.findAttribute("commandeFruit")).getNomFruit())));
                                                                        ^
Une erreur s'est produite � la ligne: 17 dans le fichier jsp: /confirm.jsp
Erreur de servlet g�n�r�e:
C:\jakarta-tomcat-5.0.19\work\Catalina\localhost\_\org\apache\jsp\confirm_jsp.java:74: cannot resolve symbol
symbol : class Fruit
location: class org.apache.jsp.confirm_jsp
      out.write(org.apache.jasper.runtime.JspRuntimeLibrary.toString((((Fruit)_jspx_page_context.findAttribute("commandeFruit")).getCouleur())));
                                                                        ^
Une erreur s'est produite � la ligne: 18 dans le fichier jsp: /confirm.jsp
Erreur de servlet g�n�r�e:
C:\jakarta-tomcat-5.0.19\work\Catalina\localhost\_\org\apache\jsp\confirm_jsp.java:77: cannot resolve symbol
symbol : class Fruit
location: class org.apache.jsp.confirm_jsp
      out.write(org.apache.jasper.runtime.JspRuntimeLibrary.toString((((Fruit)_jspx_page_context.findAttribute("commandeFruit")).getPrix())));
                                                                        ^
Une erreur s'est produite � la ligne: 19 dans le fichier jsp: /confirm.jsp
Erreur de servlet g�n�r�e:
C:\jakarta-tomcat-5.0.19\work\Catalina\localhost\_\org\apache\jsp\confirm_jsp.java:80: cannot resolve symbol
symbol : class Fruit
location: class org.apache.jsp.confirm_jsp
      out.write(org.apache.jasper.runtime.JspRuntimeLibrary.toString((((Fruit)_jspx_page_context.findAttribute("commandeFruit")).getPoids())));
                                                                        ^
7 errors
     org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:127)
     org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:351)
     org.apache.jasper.compiler.Compiler.generateClass(Compiler.java:415)
     org.apache.jasper.compiler.Compiler.compile(Compiler.java:458)
     org.apache.jasper.compiler.Compiler.compile(Compiler.java:439)
     org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:553)
     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:291)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:301)
     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:248)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
note La trace compl�te de la cause m�re de cette erreur est disponible dans les fichiers journaux de Tomcat.
--------------------------------------------------------------------------------

hello i tried what you told me but it steel seems i've
got 2 errors
here's the error
exception
org.apache.jasper.JasperException: Impossible de
compiler la classe pour la JSP
Une erreur s'est produite � la ligne: 5 dans le
fichier jsp: /confirm.jsp
Erreur de servlet g�n�r�e:
[javac] Compiling 1 source file
C:\jakarta-tomcat-5.0.19\work\Catalina\localhost\_\org\
pache\jsp\confirm_jsp.java:6: <identifier> expected
import full.package.name.Fruit;
^
C:\jakarta-tomcat-5.0.19\work\Catalina\localhost\_\org\
pache\jsp\confirm_jsp.java:47: cannot resolve symbol
symbol : class Fruit
location: class org.apache.jsp.confirm_jsp
Fruit commandeFruit = null;
^--------------------------------------
here's my jsp:
<%-- confirm.jsp --%>
<%@ page import="full.package.name.Fruit" %>
<jsp:useBean id="commandeFruit" class="Fruit" />
<jsp:setProperty name="commandeFruit"
property="nomFruit" value="Mangue" />
<jsp:setProperty name="commandeFruit"
property="couleur" value="Orange" />
<jsp:setProperty name="commandeFruit" property="prix"
value="5.95" />
<jsp:setProperty name="commandeFruit" property="poids"
param="saisie_poids" />
<HTML>
<body>
<h1>Votre commande de fruit (confirm.jsp)</h1>
<br>
Fruit : <jsp:getProperty name="commandeFruit"
property="nomFruit"/><br>
Couleur : <jsp:getProperty name="commandeFruit"
property="couleur" /><br>
Prix au kg : <jsp:getProperty name="commandeFruit"
property="prix" /> Euros<br>
Quantit� : <jsp:getProperty name="commandeFruit"
property="poids" /><br>
Total
:�<%=commandeFruit.getPrix()*commandeFruit.getPoid
() %> Euros<p></p>
Revenir � la commande pour
la modifier
</body>
</html>
First error is becoz you are using word package which is a standard identifier. So you have to change ur folder name to smething else other than package.
Second error is becoz of the first error. If the forst error is fixed second error will not occur.
Thanks
KM

Jsp compilation problem in IAS ?.

None of the JSP's present in a directory with a name "default" gets compiled . I get the javac exception given below.
Tried it out with Fortune sample application by creating a drectory with a name "default" .Even a simple jsp with a "hello" string also fails . Is "default" some kind of key word in IAS .
javac error: /usr/local/iplanet/ias6.new/ias/APPS/fortune/fortune/WEB-INF/compiled_jsp/jsp/APPS/fortune/default/test.java:1: Identifier expected. package jsp.APPS.fortune.default; Superclass HttpJspBase of class test not found. public class test extends HttpJspBase { ^ 2 errors

Hi,
I can give you a quick answer that this could be an issue. However, I would like to experiment and prove by testing across various platform and different service packs. Please let me know more details, especially on the default directory, like where the directory resides, how you have packaged the application and what is the name of the application etc. This will help me to replicate the problem and conclude at a solution.
Thanks & Regards
Ganesh .R
Developer Technical Support
Sun Microsystems
http://www.sun.com/developers/support

JWSDP 2.0 JAX-RPC example problem Fast Infoset

Hi,
I installed JWSDP 2.0 and and Tomcat 5.0 for JWSDP. The server runs fine and the example HelloWorld is accessible (I can see the WSDL file in my browser: http://localhost:8080/jaxrpc-HelloWorld/hello?WSDL).
The Problem is that I can not run the client: I tried "ant run-client". The error occurs while trying to create a stub in the file "HelloClient.java" with the following line of code:
stub = (HelloIF_Stub) (helloWorldService.getHelloIFPort());
This is the error I get:
[java] Exception in thread "main" java.lang.NoClassDefFoundError: org/jvnet/fastinfoset/FastInfosetSource
[java] at hello.HelloWorldService_Impl.getHelloIFPort(HelloWorldService_Impl.java:59)
[java] at hello.HelloClient.setUp(HelloClient.java:68)
[java] at hello.HelloClient.main(HelloClient.java:45)
[java] Java Result: 1
I am not sure about the structure of the application, so I don't know where to look for the "FastInfosetSurce" file.
Thanks for any help.
Best regards.

Hi,
I reselved the problem by just copying the FastInfoset to the jaxrpc\lib directory (I am sure this should work in a different way).
Well, the next problem I am getting is that the "XMLStreamWriter" class cannot be found. This class is contained in jsr173_api.jar.
I guess my main question is the following:
Which projects are necessary to get this simple helloWorld example to work?
I did set the JWSDP_HOME varible. Is there another setting I have to make to have all necessary jar-files available and to be able to run the samples?
Could anybody point me to a tutorial that does not only show a few lines of code (as the HelloWorld sample in the JWSDP-Tutorial) but that would instead lead me through a step-by-step sample application that I write by myself and actually runs at the end? The example in the JWSDP-Tutorial uses all kinds of existing config files which are not explained.
Thanks for your help.

Deployment of simple JSP to Oracle Servlet Engine

Hi
Anyone there tried to deploy a simple JSP running against OSE.
Please advice where can I get more information for this.
Thanks

Yes I have tried it with simple examples like data access and calling EJB. In-session EJB calls do not work but if your JSP is deployed in another Oracle JVM like 9iAS then EJB calls work.
There are two manuals you can refer:
JSP Developers guide at http://technet.oracle.com/docs/products/oracle8i/doc_library/817_doc/java.817/a83720/toc.htm
AND
Java Tools reference guide at http://technet.oracle.com/docs/products/oracle8i/doc_library/817_doc/java.817/a83727/toc.htm
null

JSP Compile problem with WLS 5.1 sp9

Hi All,
          The attached, simple JSP file uses a custom tag, and some JavaScript. When
          this is compiled into Java, the Java that is created is Bad. It seems as if
          WLS is having problems properly escaping single-quotes and double-quotes.
          Also attached, is the generated Java file. Note around line 82, and compare
          that to around line 15 of the JSP.
          Does anyone have an idea what can be done to fix this? This JSP compiles
          fine under Tomcat 3.2.
          Thanx!
          Will Hartung
          ([email protected])
          [test.jsp]
          [_test.java]


Hi All,
          The attached, simple JSP file uses a custom tag, and some JavaScript. When
          this is compiled into Java, the Java that is created is Bad. It seems as if
          WLS is having problems properly escaping single-quotes and double-quotes.
          Also attached, is the generated Java file. Note around line 82, and compare
          that to around line 15 of the JSP.
          Does anyone have an idea what can be done to fix this? This JSP compiles
          fine under Tomcat 3.2.
          Thanx!
          Will Hartung
          ([email protected])
          [test.jsp]
          [_test.java]

HELP.....!!!!! Chinese jsp compilation problem.....

Hi,
Could someone please help on the above mentioned?
I'm using JDeveloper 3.2.3 for my program development under Chinese windows platform. I have created a simple JSP page, which contains few static Chinese words and I have included the line
<%@ page contentType="text/html;charset=UTF-8"%>
at the top of the page. When I tried to compile it using encoding "UTF8" (under compiler option), the compiler gave me this error:
C:\Program Files\Oracle\JDeveloper 3.2.3\myhtml\Chinese_html\ChineseList.jsp
Error: (0) sun.io.MalformedInputException.
Btw, when I have removed the line <%@ page contentType="text/html;charset=UTF-8"%> from the page and compile, I've got this error:
C:\Program Files\Oracle\JDeveloper 3.2.3\myhtml\Chinese_html\ChineseList.jsp
Warning: (0) ISO-8859-1 character set may not match project compiler setting.
C:\Program Files\Oracle\JDeveloper 3.2.3\myhtml\Chinese_html\ChineseList.java
Error: (0) malformed input character in C:\Program Files\Oracle\JDeveloper 3.2.3\myhtml\Chinese_html\ChineseList.java.
I do appreciate your help on this. Thank you.

Here's some info one of the JSP Developers sent me:
1. HELP.....!!!!! Chinese jsp compilation problem.....
The customer is trying to parse a document generated by
Windows's notepad. When saved in UTF-8, the byte
order mark is saved too. We have a know bug that
JSP parser doesn't recognize Byte Order Mark. The
bug is : 1915285.
2. CHINESE CHARACTER ON JSP
. SQLPLUS depends on NLS_LANG setting. If you
check the windows registry, the default of NLS_LANG
depends on the OS. The user environment is Traditional
Chinese, so does NLS_LANG. If we set NLS_LANG
to .UTF8, SQLPLUS dumps the data in UTF8, however,
the command prompt will have problem displaying them.
. For JSP, as mentioned in a previous mail:
<%@ page contentType="text/html;charset=UTF-8" %> for all languages
<%@ page contentType="text/html;charset=GB2312" %> for simplified Chinese
<%@ page contentType="text/html;charset=Big5" %> for traditional Chinese
. When you enter Chinese characters on a browser,
the data is automatically converted to page encoding
(UTF-8 in your case) before sent back to the server.
But your receiving servlet/JSP needs to have request
encoding set correctly.
    I'm not sure about the JDeveloper environment,
but here is a simple JSP you may try to verify your
OC4J environment:
a.    To set up the schema:
connect scott/tiger
create table tab01(col varchar2(100));
b. Edit the connect string in nls.jsp
c. Run the nls.jsp in oc4j instance.

<%@ page contentType="text/html; charset=UTF-8" %>
<%@ page import="oracle.jdbc.*,java.sql.*,java.io.*"%>
<HTML>
<HEAD>
<TITLE>Hello</TITLE></HEAD>
<BODY>
<%
request.setCharacterEncoding("UTF-8");
String sampledata="\u7D20";
String paramValue = request.getParameter("myparam");
String connStr = "jdbc:oracle:thin:@dlsun478:5521:j2ee01";
String user = "scott";
String passwd = "tiger";
DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());
Connection conn = DriverManager.getConnection(connStr, user, passwd);
if (paramValue == null || paramValue.length() == 0) { %>
   <FORM METHOD="GET">
   Please input your name: <INPUT TYPE="TEXT" NAME="myparam"
value="<%=sampledata%>" size=20>
<BR>
   <INPUT TYPE="SUBMIT" value="Insert Data">
   </FORM>
<%
selectData(conn, out);
else
%>
   <H1> Insert Data: <%= paramValue %> </H1>
   <br/>
<%
insertData(conn, paramValue);
%>
<a href="nls.jsp">back</a>
<%
%>
</BODY>
</HTML>
<%!
public void insertData(Connection aConn, String myval)
    try {
      PreparedStatement stmt = aConn.prepareStatement("insert into tab01
values(?)");
      stmt.setString(1, myval);
      stmt.executeUpdate();
      aConn.close();
    catch (SQLException e) {
      e.printStackTrace();
public void selectData (Connection aConn, JspWriter out)
    try {
      Statement stmt = aConn.createStatement( );
      ResultSet r = stmt.executeQuery("SELECT col FROM tab01");
      out.println("<H1>List of Data:</H1>");
      while (r.next()) {
        out.println(r.getString(1)+"<br/>");
      aConn.close();
    catch (SQLException e) {
      e.printStackTrace();
    catch (IOException e) {
      e.printStackTrace();
%>

Simple DataSocket example hangs the DataSocket server

Hi,
I am having problems with the Simple DataSocket example. As soon as I try to connect to the DataSocket server on the local machine using dstp the server crashes. The error signature is:
AppName: cwdss.exe AppVer: 4.2.3.1 ModName: mfc42.dll
ModVer: 6.2.4131.0 Offset: 0001bc9b
By restarting the server I am sometimes able to connect but most of the time this only results in a repeated crash. Furthermore when I try to close either the reader or the writer after such a crash I get the error message “the RPC-server is not available”. The only way to close the program is to use the task manager. I am using Measurement Studio 7.1 and Visual Studio 2003 version 7.1.3088 and I have successfully used DataSocket to communicate with an OPC server on the local machine. I would appreciate any suggestions on how to solve the problems since I would like use dstp in my own applications.
Adam

As I wrote in the original post, it is the simple datasocket example that I am having trouble with. I have managed to get the reader and writer to talk to each other by restarting the datasocket server repeatedly, but since the datasocket server crashes most of the times when I try to connect to it (i.e. I press either manual or auto update connect) this is rather tedious work. I think that the files were replaced correctly; at least the file cwdss.exe reappeared. The version of cwdss.exe is 4.2.3.1. Which other files should I check? The version of nids.dll is the same, i.e. 4.2.3.1.
Adam

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