Problem with Servlet that generates HTML

Hello,
I have a servlet that connects to a database to get some information which it displays in a HTML file generated by the same servlet.
For each line that I want to display from the Database I create the following in my servlet:
<input type="hidden" value="Ajax-Chelsea" name="bet_1_choice"/>
However, when I test it in Tomcat it doesn't work, and I realised in Firefox that it gets the above line as follows with the bold part added:
<input type="hidden" )="" value="Ajax-Chelsea" name="bet_1_choice"/>
I also use a javascript to add the DB information in another area of the HTML page, another table, but I don't know if this is relevant.
I don't understand what is wrong. Can someone help me please?

Thanks for your responses.
Actually the problem was my javascript. Now it is sorted out.

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Having problem with javabean that generate password

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package autogenerate;
import java.util.*;
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private String Passwd;
public String getPasswd()
return this.Passwd;
public void setPasswd(String Psd)
char[] letters = { 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H',
'J', 'K', 'L', 'M', 'N', 'P', 'R', 'T',
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'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k',
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while( Psd.length() < 10 )
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can anyone help me please?
Thanks alot

this is my .java code for getter and setter
package autogenerate;
import java.util.*;
public class GeneratePwId
private String passwd;
public String getPasswd()
return this.passwd;
public void setPasswd(int length)
char[] letters = { 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I',
'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R',
'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'a',
'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j',
'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's',
't', 'u', 'v', 'w', 'x', 'y', 'z', '0', '1',
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String psd = "" ;
length = 10;
while( psd.length() < length )
psd += letters[ (int)( Math.random() * letters.length ) ] ;
this.passwd = psd;
and this is my jsp code
<html>
<head>
<title>
Try retrieving password
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<body>
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Problem with servlet call within servlet

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I am having a problem with JMenus that persist. By this I mean
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I've checked the Java bug database, and the following seems
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http://developer.java.sun.com/developer/bugParade/bugs/4235188.html
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// Example of Menu Persistence Problem
// Try running this with line 41, paintComponent(), and without line 41
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import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
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JMenuItem[] mi;
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thisFrame.addWindowListener(new WindowAdapter() {
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Well, my understanding of the way painting works is that a component doesn't UNPAINT itself. Instead a message is sent to the component under the coordinates of the menu to REPAINT itself.
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Hello, everybody.
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Problem with Spaces that started with Snow Leopard

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Second, and this one is worse, if you say launch Excel (which you want to open in Space 4) while you are in Space 1, Excel will open and switch over to Space 4... So far so good... But now, with Excel open over in Space 4, if you are now back and working in Space 1 and while there you use the Finder to go to some other, currently unopened, Excel file and request that it open, it should switch over to Space 4 and open that file but instead it opens it wherever you are, in the case mentioned here, in Space 1... So now you have Excel files opened both in Spaces 1 and 4... Clearly a bug... Spaces had some similar issues in a few early versions of Leopard but they eventually got it working... Now it appears Spaces has regressed somewhat in SL... I love spaces and use it all the time... Hope it gets fixed soon... thanks... bob...

Hi... I have since learned that the first paragraph of my original post where I say,
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Problems with client.jar - generated from webservices toolkit from JDK 1.1.7

We have deployed a web application using the webservices in WL 6.1 using JDK 1.3.1.
The clients were able to successfully access the servlet it generated and download
the client.jar. Unfortunately this client.jar seems to be dependent on JDK 1.2
and beyond. It seems to use java.util.Map class in the JNDI-SOAP SPI.
Is there any workaround or fix to this problem, so this jar can be used from a
JDK 1.1.7 env?.
Our objective is to use WL 6.1 EJB's from WL 4.5.1 using Webservices. Are there
any known problems with this approach (Ofcourse other than this).
Thank you.
Dora Potluri
Here is the stack trace from using the client.jar
Class not found java.lang.ClassNotFoundException: java.util.Map
[Root exception is java.lang.ClassNotFoundException: java.util.Map]javax.naming.
NamingException: Class not found java.lang.ClassNotFoundException: java.util.Map
at java.lang.Throwable.<init>(Compiled Code)
at java.lang.Exception.<init>(Compiled Code)
at javax.naming.NamingException.<init>(Compiled Code)
at weblogic.soap.http.SoapContext.throwNamingException(Compiled Code)
at weblogic.soap.http.SoapContext.lookup(Compiled Code)
at javax.naming.InitialContext.lookup(Compiled Code)
at weatherEJB.WeatherBean.getTemp(Compiled Code)
at weatherEJB.WeatherBeanEOImpl.getTemp(Compiled Code)
at weatherEJB.WeatherBeanEOImpl_WLSkel.invoke(Compiled Code)
at weblogic.rmi.extensions.BasicServerObjectAdapter.invoke(Compiled Code
at weblogic.rmi.extensions.BasicRequestHandler.handleRequest(Compiled
Co
de)
at weblogic.rmi.extensions.BasicRequestDispatcher$BasicExecuteRequest.ex
ecute(Compiled Code)
at weblogic.t3.srvr.ExecuteThread.run(Compiled Code)
Fri Sep 21 10:47:12 CDT 2001:<I> <EJB> Transaction: '1001087185816_1' rolled bac
k due to EJB exception:

Yes, there is an expectation that the client jar will be run on JDK 1.3x. WLS 6.1 is certified on JDK 1.3x only. This
applies to the WebServices client as well. For details on platform support see
http://e-docs.bea.com/wls/platforms/index.html
Thanks,
Jim
Jim Rivera
Product Manager, WebLogic Server
BEA Systems, Inc.
Dora Potluri wrote:
I started testing using the client.jar generated by webservices WL 6.1 and found
that it uses reflection API interfaces that are not available til JDK 1.3. Is
there an expectation that the clients of Webservices are all going to be JDK 1.3.X.
Here is the stack trace we get.
java.lang.NoClassDefFoundError: java/lang/reflect/InvocationHandler
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at weatherEJB.WeatherBean.getTemp(WeatherBean.java:106)
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We have 5 machines here in our workgroup which have the same state regarding security patches and other system updates. We recently found out that there is a problem with the NIReport.llb\Print HTML Report using IE.vi on the different machines.
If I would open the VI on MachineA the control could be loaded. If I would open the VI on MachineB the control could be loaded. If I would copy the VI from MachineB to MachineA and open the VI the control could not be loaded. If I would copy the VI from MachineA to MachineB and open the VI on MachineB the control could be loaded. MachineB could load the version from MachineA and MachineB but on MachineA only the own version will load. I have seen that both versions have the same GUID for the Microsoft Webbrowser but are different in some other aereas.
Since printing HTML Reports is part of the application which will be distributed as application I want to know if someone else have seen such a behaviour or has got problems distributing an application.
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Waldemar
Using 7.1.1, 8.5.1, 8.6.1, 2009 on XP and RT
Don't forget to give Kudos to good answers and/or questions

Hi Tom,
this is the VI <vi.lib>\Utillitiy\NIReport.llb\Print HTML Report using IE.vi copied from a machine that can load and run the VI and it will print. On this machine the control in the VI is white.
This VI will give the "Control could not be loaded" message on my machine.
The file shdocvw.dll is 2006-10-23 16:18 size 1.460 KB and I verifyed that both machines have the same version of this file.
Waldemar
Using 7.1.1, 8.5.1, 8.6.1, 2009 on XP and RT
Don't forget to give Kudos to good answers and/or questions
Attachments:
Print HTML Report using IE.png ‏11 KB

A problem with servlets with WebLogic 4.5.1 SP11

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                         out.writeObject(objs[x]);
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          at java.lang.Exception.<init>(Compiled Code)
          at java.io.IOException.<init>(Compiled Code)
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          at weblogic.servlet.internal.ServletRequestImpl.parseQueryParams(Compiled Code)
          at weblogic.servlet.internal.ServletRequestImpl.getParameter(Compiled Code)
          at weblogic.servlet.internal.ServletRequestImpl.initSessionInfo(Compiled Code)
          at weblogic.servlet.internal.ServletRequestImpl.getSession(Compiled Code)
          at SGBA.servlets.HelloWorldServlet.doPost(Compiled Code)
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          at weblogic.servlet.internal.ServletContextImpl.invokeServlet(Compiled Code)
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          at java.lang.Exception.<init>(Compiled Code)
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          at weblogic.utils.NestedRuntimeException.<init>(Compiled Code)
          at weblogic.servlet.internal.ServletRequestImpl.mergePostParams(Compiled Code)
          at weblogic.servlet.internal.ServletRequestImpl.parseQueryParams(Compiled Code)
          at weblogic.servlet.internal.ServletRequestImpl.getParameter(Compiled Code)
          at weblogic.servlet.internal.ServletRequestImpl.initSessionInfo(Compiled Code)
          at weblogic.servlet.internal.ServletRequestImpl.getSession(Compiled Code)
          at SGBA.servlets.HelloWorldServlet.doPost(Compiled Code)
          at javax.servlet.http.HttpServlet.service(Compiled Code)
          at javax.servlet.http.HttpServlet.service(Compiled Code)
          at weblogic.servlet.internal.ServletStubImpl.invokeServlet(Compiled Code)
          at weblogic.servlet.internal.ServletContextImpl.invokeServlet(Compiled Code)
          at weblogic.servlet.internal.ServletContextImpl.invokeServlet(Compiled Code)
          at weblogic.socket.MuxableSocketHTTP.invokeServlet(Compiled Code)
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          at weblogic.t3.srvr.ExecuteThread.run(Compiled Code)
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          Frankie Carrero.


          Hello,
          We have developed a client that connects to servlets in WebLogic 4.5.1. Some of the servlets use sessions to store data, and they receive some parameters from the client to retrieve information from a database.
          When we use WebLogic 4.5.1, everything works fine. However, when we upgrade it to Service Pack 11, we find a problem. If we make a servlet that receives some parameters, but it does no use sessions, everything is correct. If we make a servlet that does not receive any parameter, and we use sessions, we find no problem either. But if we make a servlet that receives parameters and uses sessions within the doPost() method, there is an exception when we call the method Request.getSession(true).
          I would thank any help about this point, since I'm not sure if this is the result of a bug, or if there is a new parameter that we have to set in the file weblogic.properties, or any other reason.
          The code of our servlet is as simple as follows:
          public void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException {
               ObjectInputStream in = new ObjectInputStream(request.getInputStream());
               String arg = null;
               String arg2 = null;
               String arg3 = null;
               try{
                    arg = (String)in.readObject();
                    arg2 = (String)in.readObject();
                    arg3 = (String)in.readObject();
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               HttpSession session = request.getSession(true);
          // WE GET THE EXCEPTION AT THIS POINT.
               Integer ival = (Integer) session.getValue("simplesession.counter");
               if (ival == null)
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                    ival = new Integer(1);
               else
                    // Increment the counter
                    ival = new Integer(ival.intValue() + 1);
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               session.putValue("simplesession.counter", ival);
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               ObjectOutputStream out = new ObjectOutputStream(response.getOutputStream());
               out.writeObject(ival);
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          public int servletClient(String usuario,String password) {
               int numero = 0;
               try{
                    // Input parameters
                    Serializable[] objs = {"login",usuario, password};
                    // Invokes the servlet
                    ObjectInputStream in = ServletWriter.postObjects(urlServlet, objs); // SEE BELOW...
                    // Get the results
                    numero = ((Integer)in.readObject()).intValue();
                    in.close();
               }catch(Exception e){
                    e.printStackTrace();
          static public ObjectInputStream postObjects(URL servlet, Serializable objs[]) throws Exception
                    URLConnection con = servlet.openConnection();
                    con.setDoInput(true);
                    con.setDoOutput(true);
                    con.setUseCaches(false);
                    con.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
                    // Write the arguments as post data
                    ObjectOutputStream out = new ObjectOutputStream(con.getOutputStream());
                    int numObjects = objs.length;
                    for (int x = 0; x < numObjects; x++) {
                         out.writeObject(objs[x]);
                    out.flush();
                    out.close();
                    return new ObjectInputStream( con.getInputStream() );
          // THE CLIENT CODE FINISHES HERE
          The exception we get is the following:
          Mon Feb 21 13:47:41 GMT-02:00 2000:<E> <ServletContext-Servlets> Servlet failed with RuntimeException
          Mon Feb 21 13:47:41 GMT-02:00 2000:<E> <ServletContext-Servlets> java.io.IOException: Unexpected end of POST data. Read 0 bytes. Content-length = 20
          at java.lang.Throwable.<init>(Compiled Code)
          at java.lang.Exception.<init>(Compiled Code)
          at java.io.IOException.<init>(Compiled Code)
          at weblogic.servlet.internal.ServletRequestImpl.mergePostParams(Compiled Code)
          at weblogic.servlet.internal.ServletRequestImpl.parseQueryParams(Compiled Code)
          at weblogic.servlet.internal.ServletRequestImpl.getParameter(Compiled Code)
          at weblogic.servlet.internal.ServletRequestImpl.initSessionInfo(Compiled Code)
          at weblogic.servlet.internal.ServletRequestImpl.getSession(Compiled Code)
          at SGBA.servlets.HelloWorldServlet.doPost(Compiled Code)
          at javax.servlet.http.HttpServlet.service(Compiled Code)
          at javax.servlet.http.HttpServlet.service(Compiled Code)
          at weblogic.servlet.internal.ServletStubImpl.invokeServlet(Compiled Code)
          at weblogic.servlet.internal.ServletContextImpl.invokeServlet(Compiled Code)
          at weblogic.servlet.internal.ServletContextImpl.invokeServlet(Compiled Code)
          at weblogic.socket.MuxableSocketHTTP.invokeServlet(Compiled Code)
          at weblogic.socket.MuxableSocketHTTP.execute(Compiled Code)
          at weblogic.t3.srvr.ExecuteThread.run(Compiled Code)
          --------------- nested within: ------------------
          weblogic.utils.NestedRuntimeException: cannot parse POST parameters of request /HelloWorldServlet
          - with nested exception:
          [java.io.IOException: Unexpected end of POST data. Read 0 bytes. Content-length = 20]
          at java.lang.Throwable.<init>(Compiled Code)
          at java.lang.Exception.<init>(Compiled Code)
          at java.lang.RuntimeException.<init>(Compiled Code)
          at weblogic.utils.NestedRuntimeException.<init>(Compiled Code)
          at weblogic.servlet.internal.ServletRequestImpl.mergePostParams(Compiled Code)
          at weblogic.servlet.internal.ServletRequestImpl.parseQueryParams(Compiled Code)
          at weblogic.servlet.internal.ServletRequestImpl.getParameter(Compiled Code)
          at weblogic.servlet.internal.ServletRequestImpl.initSessionInfo(Compiled Code)
          at weblogic.servlet.internal.ServletRequestImpl.getSession(Compiled Code)
          at SGBA.servlets.HelloWorldServlet.doPost(Compiled Code)
          at javax.servlet.http.HttpServlet.service(Compiled Code)
          at javax.servlet.http.HttpServlet.service(Compiled Code)
          at weblogic.servlet.internal.ServletStubImpl.invokeServlet(Compiled Code)
          at weblogic.servlet.internal.ServletContextImpl.invokeServlet(Compiled Code)
          at weblogic.servlet.internal.ServletContextImpl.invokeServlet(Compiled Code)
          at weblogic.socket.MuxableSocketHTTP.invokeServlet(Compiled Code)
          at weblogic.socket.MuxableSocketHTTP.execute(Compiled Code)
          at weblogic.t3.srvr.ExecuteThread.run(Compiled Code)
          I hope all this information can help you making an idea of our problem. We will be looking forward to receiving your answer.
          Thanks in advance,
          Frankie Carrero.

Problems with servlet mapping in 10g AS

Hi There,
i have a web application consisting of 2 controller servlets and use url mapping to send requests to the appropriate servlet, but i have a strange issue with 10g where it seems to be alternating between serlvets when handling requests!!!!
the web.xml is like as follows (with the app having the root context '/app'):
<servlet>
<servlet-name>control1</servlet-name>
<servlet-class>com.package1.class.name</servlet-class>
</servlet>
<servlet>
<servlet-name>control2</servlet-name>
<servlet-class>com.package2.class.name</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>control2</servlet-name>
<url-pattern>/special/*</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>control1</servlet-name>
<url-pattern>/*</url-pattern>
</servlet-mapping>
therefore i'd expect a request like http://domain.name/app/special/content to be handled by the control2 servlet and http://domain.name/app/normal/content or http://domain.name/app/normal/special/content to be handled by the control1 servlet...
but what seems to happen when requesting http://domain.name/app/special/content oc4j seems to alternate which servlet it passes it to...
is there any reason why this might be happening (like some app server configuration), as i have other applications that are configured in the same way, and there's no problems with requests going to the wrong servlet.
many thanks for your help,
Andy

In your integration process, define the import parameter under Configurable Parameters category.
http://help.sap.com/saphelp_nwpi71/helpdata/en/44/1f1a5c932d0d19e10000000a114a6b/frameset.htm
Regards,
Prateek

Problem with Servlets

Hi,
I am Tejas , a newbie with servlets. Now, I have a servlet which contains a Javascript method. On clicking a link , the Javascript method is called.
But however, I find that there is some trouble. I created a class called MainFrames.java, the object of which I am instantiating in the Javascript method.
But this code doesnt work properly. I have given the snippet below
out.println("<script type='text/javascript'>");
out.println("function threader()");
out.println("{");
out.println("alert('Inside Threader');");
out.println("<%@ page import=\"XcForm.MainFrames\"%>"); //I have a hunch that this statement is the problem
out.println("<%");
out.println("MainFrames mainframes = new MainFrames();"); //without the import statement above, the MainFrames.java class is not being recognised
out.println("%>");
out.println("}");
out.println("</script>");
Thanks in advance,
Tejas

Do not put presentation code in servlets. Put them in JSPs. And mixing serverside code (scriptlets) and clientside code (javascript) this way is indeed not going to work. That code will certainly not be executed in the order as you write. Serverside code is executed at the server and is finished when the response is completed. So any serverside code inside clientside code is alreay executed. Clientside code is executed at the client and will only execute when the response is completed (onload, etc) or when the client invokes it (onclick, onsubmit, etc). Further on, do not put business code in presentation code. Put them in servlets.

Problems with servlet filters

Hello,
I'm trying to implement filters for some of the examples presented in the j2ee tutorial. Thus, I've realized a very simple filter that works very well for the Converter example (mapped to the index.jsp URL). But this filter doesn't work with the Duke's Bank application and I don't understand why. I've tried to map this filter to the Dispatcher servlet and also to different URLs, the filter is actually executed, but the client gets no response from the server.
Here's the source code for my filter :
package com.sun.ebank.web.filters;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
public final class MyFilter implements Filter {
private FilterConfig filterConfig = null;
public void init(FilterConfig filterConfig) throws ServletException {
this.filterConfig = filterConfig;
public void destroy() {
this.filterConfig = null;
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
if (filterConfig == null) return;
HttpServletRequest hr = (HttpServletRequest)request;
System.out.println ("MyFilter : " + hr.getMethod () + " URL=" + hr.getRequestURL () + " QueryString={" + hr.getQueryString () + "}");
chain.doFilter(request, response);
public String toString() {
if (filterConfig ==null) return ("MyFilter()");
StringBuffer sb = new StringBuffer("MyFilter(");
sb.append(filterConfig);
sb.append(")");
return (sb.toString());
Can anybody help me?
Thanks,
B.F.

As you're not actually doing anything in this filter but a quick System.out.print, there doesn't appear to be a problem with the filter code.
What does your web.xml file look like?
Does your IDE allow you to trace through the filter to the next target in the chain? If so, where does the code die? If not, use System.out.print statements to determine how far into the code you get.
No response to the client usually means that the response didn't have any content set. You can verify this by checking the state of the response object after doFilter has been called; if the headers haven't been set then something crashed in a bad way.
Good luck!

Problem with Servlet Tutorial

I am going through the servlet tutorial with a specific end in mind. I found a section that I think relates exactly to what I want to do. I want to have servlet redirect the user to another URL. The following code is given as an example.
public class Dispatcher extends HttpServlet {
   public void doGet(HttpServletRequest request,
      HttpServletResponse response) {
      request.setAttribute("selectedScreen",
         request.getServletPath());
      RequestDispatcher dispatcher = request.
         getRequestDispatcher("/template.jsp");
      if (dispatcher != null)
         dispatcher.forward(request, response);
   public void doPost(HttpServletRequest request,
}The problem is that I can't compile this. There is no HttpServletRequest.getRequestDispatcher(String) method. Am I misssing something here? Am I even on the right track?

An extract from one of my servlets that redirects to
another URL is
this:response.sendRedirect(response.encodeRedirec
URL("NoLogon"));But it appears you want to
forward, rather than redirect. There's a difference,
but I don't exactly know what it is. The forwarding
example in my servlets book looks like
this:RequestDispatcher dispatcher =
getServletContext().getRequestDispatcher(address);
dispatcher.forward(request, response);
I tried pasting your first example into my code and got the follwoing error:
Method encodeDirectURL(java.lang.String) not found in interface javax.servlet.ServletResponse
It seems like there is still something missing here. When I look at the API I only see four methods for this class.

Problem with Servlet that generates HTML

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