Help! Simple Servlet Problem

hi,
I am new to servlets. I am trying to connect to database and retrive firstname and lastname and display it. When i run it i get a blank page. Can someone tell me what am i doing wrong.
Here is the code.
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.sql.*;
import javax.servlet.ServletException;
public class DisplayAll extends HttpServlet{
public void doGet(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException{
res.setContentType("text/html");
PrintWriter pw = res.getWriter();
try{
Class.forName("sun.jdbc.odbc.Jdbc.OdbcDriver");
Connection myCon = DriverManager.getConnection
("jdbc:odbc:SCANODBC","SYSDBA", "masterkey");
Statement myStmt = myCon.createStatement();
myStmt.execute("SELECT * FROM PINFO WHERE POLICYNUMBER=B05007584");
ResultSet mySet = myStmt.getResultSet();
while(mySet.next()){
String fname = mySet.getString("FIRSTNAME");
String lname = mySet.getString("LASTNAME");
pw.println("<html>");
pw.println("<body>");
pw.println("Firstname: " + fname);
pw.println("Lastname: " + lname);
pw.println("</body>");
pw.println("</html>");
myStmt.close();
myCon.close();
catch(SQLException e){
catch(ClassNotFoundException e){
}

You are putting <HTML><BODY> inside the while loop. Try the following and also close the statement and connection in "finally" block as opposed to in "try" block itself.
pw.println("<html>");
pw.println("<body>");
while(mySet.next()){
String fname = mySet.getString("FIRSTNAME");
String lname = mySet.getString("LASTNAME");
pw.println("Firstname: " + fname);
pw.println("Lastname: " + lname);
} //end while()
pw.println("</body>");
pw.println("</html>");
}//end try
catch(SQLException e){
finally
myStmt.close();
myCon.close();

Similar Messages

Help-simple-stupid-problem

I am having jswdk1.0.1 . My servlets are working.
Now I want to run my JSP code. My JSP code contains "Hello World" in a loop .The for loop is in a JSP tag. Whatever may be the value of loop(0) , browser shows Hello World only once. In short JSP is not working.
The problem maybe in classpath variable.( I have Win98, Apache is not working on my m/c)
Please tell me where & how to write it.

<% for (....)
%>
<h1> hello world<\h1>
<\body>
<\html>What do you mean by "the jsp tags are not recognised"?
If the above code is the exact code you are using, then you need to close the for loop:
<% for (....)
%>
<h1> hello world<\h1>
<%
%>
<\body>
<\html>However, the code shouldn't compile if that's the problem...
Does the JSP code get printed to the screen? or is it in the page source after you've opened the page? If so, then your page isn't getting served properly by the JSP engine - its probably oin the wrong place. What's the URL you use to accesss the page? and what directory is it in?

Help simple 3d problem

Hey,
I practice director and work simple car game.
I have done moving and collision and motion but i have one problem.
Now, player is #box and should be car model.
I have in 3d scene model car what name is "killercar".
Problem is how i change this sphere to killercar.
My code is:
--boxR = scene.newModelResource("player R",#box)
--my = scene.newModel("player",boxR)
These what i try, not work:
boxR = scene.newModelResource("player R",model("killercar"))

Is there anyway to reset to the original settings?
You simply delete the prefs in C:\Users\You\AppData\Roaming. I'm still not clear what exactly you are doing, though. If you are using the 3D extruded text you'll just have to live with it. That stuff is slow as hog... Only the conventional flat text will render faster, but only if you set the comp to the Standard 3D renderer.
Mylenium

HELP - Simple JMS Problem

package com.tpc.jms.simpleProducer;
import javax.jms.*;
import javax.naming.*;
import java.util.Hashtable;
import java.util.Properties;
public class SimpleJMSTest {
public static final String PROVIDER_URL = "jms://localhost:7676";
public static final String CONTEXT_FAC = "com.sun.jndi.cosnaming.CNCtxFactory";
public static void main (String argv[]) {
try {
Properties properties = new Properties();
properties.put(Context.PROVIDER_URL, PROVIDER_URL);
properties.put(Context.INITIAL_CONTEXT_FACTORY, CONTEXT_FAC);
properties.put(Context.SECURITY_PRINCIPAL, "guest");
properties.put(Context.SECURITY_CREDENTIALS, "guest");
InitialContext initialCtx = new InitialContext(properties);
System.out.println("Good!");
//TopicConnectionFactory topicConnFactory = (TopicConnectionFactory) initialCtx.lookup (fac);
//Topic nasdaqTopic = (Topic)initialCtx.lookup(topic);
/* System.out.println("Creating topic connection");
TopicConnection topicConnection = topicConnFactory.createTopicConnection();
topicConnection.start ();
System.out.println("Creating topic session: not transacted, auto ack");
TopicSession topicSession = topicConnection.createTopicSession(false, Session.AUTO_ACKNOWLEDGE);
System.out.println("Creating topic, subscriber");
TopicSubscriber nasdaqTopicSubscriber = topicSession.createSubscriber (nasdaqTopic);
System.out.println ("Ready to subscribe for messages :");
nasdaqTopicSubscriber.setMessageListener(new SubscriberListener());*/
catch (Exception e) {
e.printStackTrace ();
This gives me an exception:
javax.naming.ConfigurationException: Invalid URL: mq:localhost:7676 [Root exception is java.net.MalformedURLException: unknown protocol: mq]
What is the protocol? I've tried http, mq, jms, mqtcp (I know its running on a TCP port).
What is going on here?

the protocol depends on ur jms vendor..say for weblogic they use t3..try uisng "iiop" btw..whats ur server?

Problem With Deploying a very simple Servlet

HELP REQUIRED:
Hi,
I'm including code of a very simple Servlet application (I shd not call it an application):
index.html
==========
<html><body bgcolor="#FFFFFF">
     <head>
     <title> Rajeev Asthana </title>
<form action = "/HelloWorldApp/HelloWorld" method = "POST" >
Please press Submit
<input type = "submit" value = "Press Me!">
</form>
</body></html>
HelloWorld.java
===============
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class HelloWorld extends HttpServlet {
     public void doPost(HttpServletRequest request,
               HttpServletResponse response)
          throws ServletException, IOException {
          response.setContentType("text/html");
          PrintWriter out = response.getWriter();
          out.println("<html><body bgcolor=\"#FFFFFF\">");
          out.println("<p>Hello World!</p>");
          out.println("</body></html>");
          out.close();
web.xml
========
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/j2ee" version="2.4" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
<display-name>HelloWorldApp</display-name>
<servlet>
<display-name>HelloWorld</display-name>
<servlet-name>HelloWorld</servlet-name>
<servlet-class>HelloWorld</servlet-class>
</servlet>
</web-app>
sun-web.xml
===========
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE sun-web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Application Server 8.0 Servlet 2.4//EN" "http://www.sun.com/software/appserver/dtds/sun-web-app_2_4-0.dtd">
<sun-web-app xmlns="http://java.sun.com/xml/ns/j2ee">
<context-root>/HelloWorldApp</context-root>
<session-config>
<session-manager persistence-type="memory">
<manager-properties/>
<store-properties/>
</session-manager>
<session-properties/>
<cookie-properties/>
</session-config>
<cache enabled="false" max-entries="4096" timeout-in-seconds="30">
<default-helper/>
</cache>
<class-loader delegate="true"/>
<jsp-config/>
</sun-web-app>
I have deployed it in following directory structure:
C:\Sun\AppServer\domains\domain1\applications\j2ee-modules\HelloWorldApp\
|
|
|               |               |               |
|               |               |               |
META-INF          WEB-INF          HelloWorld.java          index.html
               |
               |
          |          |          |          |
          |          |          |          |
     classes          sun-web.xml     web.xml          sun-j2ee-ri-project
     |
     |
     HelloWorld.class
While generating HelloWorldApp.war (which is the war file for this app), I specifies /HelloWorldApp as context root (sun specific).
Now, when I deployed it thru Admin Tool and then clicked on "Launch", it displays a page with :
Please press Submit Press Me!
But when I click the button "Press Me!", it says:
"The requested resource (/HelloWorldApp/HelloWorld) is not available."
What should I do to correct the problem?
Thanks in advance.


Yes, you need to add a servlet -mapping element and adjust your form to submit to the appropriate URL mapping.
<servlet-mapping>
<servlet-name>HelloWorldServlet</servlet-name>
<url-pattern>/servlet/Hello</url-pattern>
</servlet-mapping>

PLEASE HELP:not able to load a simple servlet

Hi,
I'm new to weblogic server.I'm trying to setup weblogic 510.Everything was
going fine until I got stuck to this small thing.I'm not able to load a
simple servlet!.
I would appreciate any pointers regarding this.Please Help me!!!
Here is what I tried:
I have installed weblogic510 plug-in for IIS.I could successfully run jsp
files.However I am not able to load simple servlets;It gave an exception
"java.lang.IllegalAccessError: try to access class
weblogic/utils/classloaders/FileSource from class
weblogic/servlet/internal/WarClassFinder"
Details of my configuration:
WebServer - IIS 4.0
IIS port=80
Weblogic port=7001
I had set it in such a way that all the requests first go to IIS and then
IIS redirects them to Weblogic.I've followed the steps according to the
document "Installing the Weblogic ISAPI Plug-in".
I've registered the servlet in weblogic.properties as following:
weblogic.httpd.register.hello=examples.servlets.HelloWorld2
I tested the servlet by URL http://localhost:7001/hello
Following is the eact text for the exception I got in the WeblogicServer
window:
Mon Jul 24 12:13:13 PDT 2000:<E> <ServletContext-General> Error loading
servlet:
examples.servlets.HelloWorld2
java.lang.IllegalAccessError: try to access class
weblogic/utils/classloaders/Fi
leSource from class weblogic/servlet/internal/WarClassFinder
at
weblogic.servlet.internal.WarClassFinder.getSource(WarClassFinder.jav
a, Compiled Code)
at
weblogic.servlet.internal.WarClassFinder.getClassSource(WarClassFinde
r.java:110)
at
weblogic.utils.classloaders.GenericClassLoader.findLocalClass(Generic
ClassLoader.java:381)
at
weblogic.utils.classloaders.GenericClassLoader.reallyLoadClass(Generi
cClassLoader.java, Compiled Code)
at
weblogic.utils.classloaders.RecursiveReloadOnModifyClassLoader$Slave.
loadClass(RecursiveReloadOnModifyClassLoader.java:234)
at
weblogic.utils.classloaders.GenericClassLoader.loadClass(GenericClass
Loader.java:146)
at
weblogic.utils.classloaders.RecursiveReloadOnModifyClassLoader.findLo
calClass(RecursiveReloadOnModifyClassLoader.java:109)
at
weblogic.utils.classloaders.GenericClassLoader.reallyLoadClass(Generi
cClassLoader.java, Compiled Code)
at
weblogic.utils.classloaders.GenericClassLoader.loadClass(GenericClass
Loader.java:172)
at
weblogic.utils.classloaders.GenericClassLoader.loadClass(GenericClass
Loader.java:146)
at
weblogic.servlet.internal.ServletStubImpl.prepareServlet(ServletStubI
mpl.java:291)
at
weblogic.servlet.internal.ServletStubImpl.getServlet(ServletStubImpl.
java:164)
at
weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubIm
pl.java:99)
at
weblogic.servlet.internal.ServletContextImpl.invokeServlet(ServletCon
textImpl.java:742)
at
weblogic.servlet.internal.ServletContextImpl.invokeServlet(ServletCon
textImpl.java:686)
at
weblogic.servlet.internal.ServletContextManager.invokeServlet(Servlet
ContextManager.java:247)
at
weblogic.socket.MuxableSocketHTTP.invokeServlet(MuxableSocketHTTP.jav
a:361)
at
weblogic.socket.MuxableSocketHTTP.execute(MuxableSocketHTTP.java:261)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java, Compiled
Code)
Mon Jul 24 12:13:13 PDT 2000:<E> <ServletContext-General> Servlet failed
with Ex
ception
I dont think there were any problems in the classpath or
servletpath;Basically WeblogicServer was able to locate the servlet but when
it tried to load the servlet it gave this exception.
I would appreciate any ideas/suggestions.
Thanks,
Sravan

Nice to hear it works!
However, one mistake you have in the configuration you provided:
You put D:\weblogic\BDL\servletclasses in both CLASSPATH and
weblogic.class.path, remove it from CLASSPATH.
Cheers - Wei
Sravan Thella <[email protected]> wrote in message
news:[email protected]...
Hi Michael and Wei,
Thank you very much for the response.
My servlet details:
Name - HelloWorld2.class
package - examples.servlets
Location - d:\weblogic\BDL\servletclasses ---- here BDL is my new folder
where I want to keep my servlets
My CLASSPATH(environment) settings:
D:\weblogic\BDL\servletclasses;d:\weblogic\classes\boot;d:\weblogic\eval\clo
>
udscape\lib\cloudscape.jar;d:\weblogic\lib\poolorb.jar;D:\java\jre\lib\rt.ja
r;
my weblogic classpath settings(set it thru wlconfig)
D:\weblogic\BDL\servletclasses;d:\weblogic\classes\boot;d:\weblogic\eval\clo
>
udscape\lib\cloudscape.jar;d:\weblogic\lib\poolorb.jar;D:\java\jre\lib\rt.ja
r;
My weblogic.policy:
grant codeBase "file:d:/weblogic/-" {
permission java.io.FilePermission "d:${/}weblogic${/}-",
"read,write,delete,execute";
permission java.net.SocketPermission "localhost:1-9000",
"connect,accept,listen,resolve";
permission java.awt.AWTPermission "accessClipboard";
permission java.awt.AWTPermission "accessEventQueue";
permission java.awt.AWTPermission "showWindowWithoutWarningBanner";
permission java.io.SerializablePermission"enableSubclassImplementation";
permission java.io.SerializablePermission "enableSubstitution";
permission java.lang.RuntimePermission "accessClassInPackage.*";
permission java.lang.RuntimePermission "accessDeclaredMembers.*";
permission java.lang.RuntimePermission "createClassLoader";
permission java.lang.RuntimePermission "createSecurityManager";
permission java.lang.RuntimePermission "defineClassInPackage.*";
permission java.lang.RuntimePermission "exitVM";
permission java.lang.RuntimePermission "getClassLoader";
permission java.lang.RuntimePermission "createClassLoader";
permission java.lang.RuntimePermission "getProtectionDomain";
permission java.lang.RuntimePermission "loadLibrary.*";
permission java.lang.RuntimePermission "modifyThread";
permission java.lang.RuntimePermission "modifyThreadGroup";
permission java.lang.RuntimePermission "readFileDescriptor";
permission java.lang.RuntimePermission "setContextClassLoader";
permission java.lang.RuntimePermission "setFactory";
permission java.lang.RuntimePermission "setIO";
permission java.lang.RuntimePermission "setProtectionDomain";
permission java.lang.RuntimePermission "setSecurityManager";
permission java.lang.RuntimePermission "writeFileDescriptor";
permission java.lang.reflect.ReflectPermission "suppressAccessChecks";
permission java.net.NetPermission "requestPasswordAuthentication";
permission java.net.NetPermission "setDefaultAuthenticator";
permission java.security.SecurityPermission "getPolicy";
permission java.security.SecurityPermission "setPolicy";
permission java.util.PropertyPermission "*", "read,write";
grant codeBase "file:d:/weblogic/BDL/servletclasses/-" {
permission java.io.FilePermission
"d:${/}weblogic${/}BDL{/}servletclasses{/}-", "read,write,delete,execute";
permission java.net.SocketPermission "localhost:1-9000",
"connect,accept,listen,resolve";
permission java.awt.AWTPermission "accessClipboard";
permission java.awt.AWTPermission "accessEventQueue";
permission java.awt.AWTPermission "showWindowWithoutWarningBanner";
permission java.io.SerializablePermission"enableSubclassImplementation";
permission java.io.SerializablePermission "enableSubstitution";
permission java.lang.RuntimePermission "accessClassInPackage.*";
permission java.lang.RuntimePermission "accessDeclaredMembers.*";
permission java.lang.RuntimePermission "createClassLoader";
permission java.lang.RuntimePermission "createSecurityManager";
permission java.lang.RuntimePermission "defineClassInPackage.*";
permission java.lang.RuntimePermission "exitVM";
permission java.lang.RuntimePermission "getClassLoader";
permission java.lang.RuntimePermission "createClassLoader";
permission java.lang.RuntimePermission "getProtectionDomain";
permission java.lang.RuntimePermission "loadLibrary.*";
permission java.lang.RuntimePermission "modifyThread";
permission java.lang.RuntimePermission "modifyThreadGroup";
permission java.lang.RuntimePermission "readFileDescriptor";
permission java.lang.RuntimePermission "setContextClassLoader";
permission java.lang.RuntimePermission "setFactory";
permission java.lang.RuntimePermission "setIO";
permission java.lang.RuntimePermission "setProtectionDomain";
permission java.lang.RuntimePermission "setSecurityManager";
permission java.lang.RuntimePermission "writeFileDescriptor";
permission java.lang.reflect.ReflectPermission "suppressAccessChecks";
permission java.net.NetPermission "requestPasswordAuthentication";
permission java.net.NetPermission "setDefaultAuthenticator";
permission java.security.SecurityPermission "getPolicy";
permission java.security.SecurityPermission "setPolicy";
permission java.util.PropertyPermission "*", "read,write";
I dont know what is wrong here. In the weblogic.policy file,I tried
differrent combinations but it never worked.
I find weblogic documentation for troubleshooting to be pathetic.Notuseful
at all.Documentation looks
good to read ;not for practical purposes.I'm not sure whether others have
similar opinion.
I'm stuck at this thing for the past few days,I still have lot of work todo
to purusue our management team to buy weblogic
but I'm still stuck at this thing.
Thank you very much for your time.
Thanks,
Sravan
"Sravan Thella" <[email protected]> wrote in message
news:[email protected]...
Hi,
I'm new to weblogic server.I'm trying to setup weblogic 510.Everything
was
going fine until I got stuck to this small thing.I'm not able to load a
simple servlet!.
I would appreciate any pointers regarding this.Please Help me!!!
Here is what I tried:
I have installed weblogic510 plug-in for IIS.I could successfully runjsp
files.However I am not able to load simple servlets;It gave an exception
"java.lang.IllegalAccessError: try to access class
weblogic/utils/classloaders/FileSource from class
weblogic/servlet/internal/WarClassFinder"
Details of my configuration:
WebServer - IIS 4.0
IIS port=80
Weblogic port=7001
I had set it in such a way that all the requests first go to IIS andthen
IIS redirects them to Weblogic.I've followed the steps according to the
document "Installing the Weblogic ISAPI Plug-in".
I've registered the servlet in weblogic.properties as following:
weblogic.httpd.register.hello=examples.servlets.HelloWorld2
I tested the servlet by URL http://localhost:7001/hello
Following is the eact text for the exception I got in the WeblogicServer
window:
Mon Jul 24 12:13:13 PDT 2000:<E> <ServletContext-General> Error loading
servlet:
examples.servlets.HelloWorld2
java.lang.IllegalAccessError: try to access class
weblogic/utils/classloaders/Fi
leSource from class weblogic/servlet/internal/WarClassFinder
at
weblogic.servlet.internal.WarClassFinder.getSource(WarClassFinder.jav
a, Compiled Code)
at
weblogic.servlet.internal.WarClassFinder.getClassSource(WarClassFinde
r.java:110)
at
weblogic.utils.classloaders.GenericClassLoader.findLocalClass(Generic
ClassLoader.java:381)
at
weblogic.utils.classloaders.GenericClassLoader.reallyLoadClass(Generi
cClassLoader.java, Compiled Code)
at
weblogic.utils.classloaders.RecursiveReloadOnModifyClassLoader$Slave.
loadClass(RecursiveReloadOnModifyClassLoader.java:234)
at
weblogic.utils.classloaders.GenericClassLoader.loadClass(GenericClass
Loader.java:146)
at
weblogic.utils.classloaders.RecursiveReloadOnModifyClassLoader.findLo
calClass(RecursiveReloadOnModifyClassLoader.java:109)
at
weblogic.utils.classloaders.GenericClassLoader.reallyLoadClass(Generi
cClassLoader.java, Compiled Code)
at
weblogic.utils.classloaders.GenericClassLoader.loadClass(GenericClass
Loader.java:172)
at
weblogic.utils.classloaders.GenericClassLoader.loadClass(GenericClass
Loader.java:146)
at
weblogic.servlet.internal.ServletStubImpl.prepareServlet(ServletStubI
mpl.java:291)
at
weblogic.servlet.internal.ServletStubImpl.getServlet(ServletStubImpl.
java:164)
at
weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubIm
pl.java:99)
at
weblogic.servlet.internal.ServletContextImpl.invokeServlet(ServletCon
textImpl.java:742)
at
weblogic.servlet.internal.ServletContextImpl.invokeServlet(ServletCon
textImpl.java:686)
at
weblogic.servlet.internal.ServletContextManager.invokeServlet(Servlet
ContextManager.java:247)
at
weblogic.socket.MuxableSocketHTTP.invokeServlet(MuxableSocketHTTP.jav
a:361)
at
weblogic.socket.MuxableSocketHTTP.execute(MuxableSocketHTTP.java:261)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java,Compiled
Code)
Mon Jul 24 12:13:13 PDT 2000:<E> <ServletContext-General> Servlet failed
with Ex
ception
I dont think there were any problems in the classpath or
servletpath;Basically WeblogicServer was able to locate the servlet butwhen
it tried to load the servlet it gave this exception.
I would appreciate any ideas/suggestions.
Thanks,
Sravan

Problem compiling simple servlet

I am trying to compile a very simple servlet.
When I do, I get the following error message:
Package javax.servlet does not exist
I am using the Java 2 SDK, Standard Edition Version 1.3.1.
I have downloaded the servlet api (zip file servletapi2_1_1win.zip)
from Sun's site. I unzipped these files in my lib directory; there are two folders,
one called api and the other called src. Api and Src directories have their own
sub-folders, javax/servlet/http etc.
I am using W2K ; I had to create a CLASSPATH system variable in the environment
variables section of control panel since there was none defined.
I added the following line:
C:\jdk1.3.1_01\lib\api\javax\servlet;C:\jdk1.3.1_01\lib\api\javax\servlet\http;
I also did this for the PATH statement..
My servlet looks like this:
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class howdy extends HttpServlet {
public void doGet(HttpServletRequest req, HttpServletResponse res)
throws ServletException, IOException {
res.setContentType("text/html");
PrintWriter out = res.getWriter();
out.println("<HTML>");
out.println("<HEAD><TITLE>Hello World </TITLE></HEAD>");
out.println("<BODY>");
out.println("<BIG>Hello World </BIG>");
out.println("</BODY></HTML>");

Thanks. I was able to figure it out by specifying the
full classpath
at the command line, like this:
C:> javac -classpath
C:\jdk1.3.1_01\lib\servletapi2_1_1-win.zip\MyServlet.ja
a
Apparantly the system doesn't acknowledge the
environmental variable that
I created in the control panel; also I have no
autoexec.bat file...so it
looks like I have to write out the full path whenever
I need to compile
something. Kind of bothersome, but at least it
works.
You shouldn't have to do this. What operating system are you using?
If you are using win2000, winNT or winxp, you should set the classpath in your system environment varialbes. You can also make a config.bat file and put everything in there. Then just run this config.bat file to set up your environment once for every session.
Here's a file that I have set up on one of our NT machines. I just double click the icon for this file on my shortcut, and it gives me the window where I can compile my java programs.
Hope this helps.
Kamran
=========== File SetJava.bat ============
set PATH=%PATH%;m:\jdk1.3\bin
set CLASSPATH=m:\jdk1.3\jre\lib;m:\jdk1.3\jaxp-1.1\jaxp.jar;m:\jdk1.3\jaxp-1.1\crimson.jar;m:\jdk1.3\jaxp-1.1\xalan.jar;.
cd cis235
%SystemRoot%\system32\cmd.exe

Simple OOP Problem. Help!

This is just a simple OOP problem that i cant decide on a best
implementation for.
im passing an object to an instance of, 'TabbedFrame', which is just
a frame with a Tabbed Pane in it that is holding custom panels.
however, these custom panels need access to the object being
passed to 'TabbedFrame' and to some methods in it.
i cant make them static however so how do i gain access to them?
is my only option to pass the 'TabbedFrame' to each panel?
like - jtabbedpane.add( "Panel 1", new mypanel1(this));
here is code:
new TabbedFrame( DataObject );
public class TabbedFrame{
public TabbedFrame(DataObject do){
this.do = do;
jtabbedpane.add( "Panel 1", new mypanel1() );
DataObject do;
public class mypanel1{
public mypanel1(){
// need access to DataObject of the 'TabbedFrame' object that instantiated
// this 'mypanel1' and to some of its methods
}i would just pass the DataObject to evey panel (there are 12) but
i also need to be able to call methods in the 'TabbedFrame'.
Any help would be appreciated!

Modify mypanel1's constructor:
public class mypanel1{
TabbedFrame tf;
public mypanel1(TabbedFrame tf){
this.tf = tf;
// need access to DataObject of the 'TabbedFrame' object that instantiated
// this 'mypanel1' and to some of its methods
DataObject theDo = tf.getDataObject();
tf.someMethod(); // Call method on the TabbedFrame
}In TabbedFrame:
public TabbedFrame(DataObject do){
this.do = do;
// Modify call to constructor to pass "this" TabbedFrame.
jtabbedpane.add( "Panel 1", new mypanel1(this) );
}

Problem running simple servlet on tomcat 4.0

hi,
i have setup tomcat4.0 on the server and i am trying to run a simple servlet but it is not working. here is what i have done:
1. setting the CATALINA_HOME variable to the directory where tomcat is installed
2. setting the classpath variable to servlet.jar
3. i am putting the .class fille in tomcat-home-directory/webapps/ROOTS/WEB-INF/classes
4. i am giving the url as http://localhost:8080/servlet/HelloServlet.class
but error is given...could you please tell where could i have probably made a mistake
regards
preeti

hi tnguyen1973
now my servlets are running on the server provided they are kept under /examples/WEB-INF/classes. But now i have my own folder at the same level of examples called Lm which also has WEB-INF/classes. but if i put my servlets here it is giving exception.hope u got me. please, tell me where should i make necessary modifications to get the servlets run from my own folder instead of examples
thank u

Simple servlet help - please

I am trying to write a simple servlet that based on the client ip redirect to a new page.
I can get the client ip and return it. But what I am not sure how to do next is to take that ip address and search through the text file and return the second field (i.e abc.html)
I have setup a text file that is tab delimmited that looks like the following:
XXX.XXX.XXX.XXX abc.html
XXX.XXX.XXX.123 apps/index.html
Any suggestions greatly appreciated.

A simple solution:
Format your file correctly and use it as a properties file.(Take a look at the Properties Class: http://java.sun.com/j2se/1.4/docs/api/java/util/Properties.html )
To check the values, load your file as a Properties:
public static final String PATH_OF_THE_FILE = "textFile.properties";
private Properties props;
    InputStream sFile= null;
    try
      sFile= ClassLoader.getSystemResourceAsStream(PATH_OF_THE_FILE );
      props = new Properties();
      props.load(sFile);
      sFile.close();
    }catch(Throwable t){...}..and ask for the property you need:
String value= props.getProperty(theIP);Another solution would be to load your ip/url pairs into a static HashMap (check HashMap class: http://java.sun.com/j2se/1.4/docs/api/java/util/HashMap.html )
HTH

Weblogic error while deplying a simple servlet program

Hi This is a very simple servlet program.
I am trying to deploy it on the weblogic server but i get this error as follow
Unable to access the selected application.
*javax.enterprise.deploy.spi.exceptions.InvalidModuleException: [J2EE Deployment SPI:260105]Failed to create*
DDBeanRoot for application, 'E:\AqanTech\WebApp1\myApp.war'.
I have checked everything, right from my code to my web.xml file. I have used a build.bat file to build my war file.
PLEASE HELP ME TO SOLVE THIS HUGE PROBLEM OF MINE ?
Thanks,
Shoeb

Hi,
The J2EE Error code siply suggest that there is something wrong in your Deployment Descriptors...
Can u please post the XML files available inside your "WEB-INF" directory?
Thanks
Jay SenSharma
http://jaysensharma.wordpress.com (WebLogic Wonders Are Here)

Unable to deploy a simple servlet using WAR file on Oracle9iAS v9.0.3

Hi All,
I am facing problem while deploying a simple servlet using WAR file on Oracle 9i App Server.
I have installed Oracle9iAS J2EE and Web Cache v9.0.3 on Windows 2000 server.
It includes:
     - Oracle HTTP Server
     - Oracle9iAS Containers for J2EE
     - Oracle9iAS Web Cache
     - Oracle Enterprise Manager
The release of installed Oracle9iAS is Release 2 (9.0.3)
I referred following link to Deploy Applications Using WAR file:
     http://otn.oracle.com/products/ias/daily/sept12.html
As mentioned in this documentation I have followed following steps to deploy WAR file:
1] I have created a war file by name SimpleServlet.war. In SimpleServlet.war, there is a servlet by name Simple which prints time at which servlet was accessed.
2] I have modified <ora9ias_home>\j2ee\home\config\application.xml and added following web module entry:
     <web-module id="SimpleServlet" path="../../home/applications/SimpleServlet.war" />
3] To make this module accessible from over the web, I have modified file
     <ora9ias_home>\j2ee\home\config\default-web-site.xml and added following entry:
     <web-app application="SimpleServlet" name="SimpleServlet" root="/SimpleServlet"/>
4] I saved both the files and started Oracle HTTP Server and accessed page as below:
          http://<server>:7777/SimpleServlet/Simple
where Simple is servlet in SimpleServlet.war file.
In the browser, The page cannot be found is shown to user. I have verified that SimpleServlet.war is extracted to SimpleServlet folder under <ora9ias_home>\j2ee\home\applications folder. I found that Simple.class is stored under WEB-INF/classes folder and web.xml contains correct entry for url pattern for servlet Simple.
What else could be the problem? Am I placing the war file in wrong place or modifying application.xml or default-web-site.xml in a wrong directory?
This is very urgent. Please help me with your valuable comments on this.
Thanks in advance.
Regards,
Sandesh

Hi All,
I am facing problem while deploying a simple servlet
using WAR file on Oracle 9i App Server.
I have installed Oracle9iAS J2EE and Web Cache v9.0.3
on Windows 2000 server.
It includes:
     - Oracle HTTP Server
     - Oracle9iAS Containers for J2EE
     - Oracle9iAS Web Cache
     - Oracle Enterprise Manager
The release of installed Oracle9iAS is Release 2
(9.0.3)
I referred following link to Deploy Applications
Using WAR file:
     http://otn.oracle.com/products/ias/daily/sept12.html
As mentioned in this documentation I have followed
following steps to deploy WAR file:
1] I have created a war file by name
SimpleServlet.war. In SimpleServlet.war, there is a
servlet by name Simple which prints time at which
servlet was accessed.
2] I have modified
<ora9ias_home>\j2ee\home\config\application.xml and
added following web module entry:
<web-module id="SimpleServlet"
path="../../home/applications/SimpleServlet.war" />
3] To make this module accessible from over the web,
I have modified file
<ora9ias_home>\j2ee\home\config\default-web-site.xml
and added following entry:
<web-app application="SimpleServlet"
name="SimpleServlet" root="/SimpleServlet"/>
4] I saved both the files and started Oracle HTTP
Server and accessed page as below:
          http://<server>:7777/SimpleServlet/Simple
where Simple is servlet in SimpleServlet.war file.
In the browser, The page cannot be found is shown to
user. I have verified that SimpleServlet.war is
extracted to SimpleServlet folder under
<ora9ias_home>\j2ee\home\applications folder. I found
that Simple.class is stored under WEB-INF/classes
folder and web.xml contains correct entry for url
pattern for servlet Simple.
What else could be the problem? Am I placing the war
file in wrong place or modifying application.xml or
default-web-site.xml in a wrong directory?
This is very urgent. Please help me with your
valuable comments on this.
Thanks in advance.
Regards,
SandeshHave you restarted you http server and then tried to load it again? Are you using the right port; maybe you have to use port 7778? Check you server settings in the http server instance. Also check your url binding of you application at Farm > Application Server: infrastructurehost > OC4J_instance > Application: appname > Web Module: modulename
Good luck!
rgds Thomas

Unable to deploy a simple servlet using WAR file

Hi All,
I am facing problem while deploying a simple servlet using WAR file on Oracle 9i App Server.
I have installed Oracle 9i App Server. I referred following link to Deploy Applications Using WAR file:
     http://otn.oracle.com/products/ias/daily/sept12.html
As mentioned in this documentation I have followed following steps to deploy WAR file:
1] I have created a war file by name SimpleServlet.war. In SimpleServlet.war, there is a servlet by name Simple which prints time at which servlet was accessed.
2] I have modified <ora9ias_home>\j2ee\home\config\application.xml and added following web module entry:
     <web-module id="SimpleServlet" path="../../home/applications/SimpleServlet.war" />
3] To make this module accessible from over the web, I have modified file
     <ora9ias_home>\j2ee\home\config\default-web-site.xml and added following entry:
     <web-app application="SimpleServlet" name="SimpleServlet" root="/SimpleServlet"/>
4] I saved both the files and started Oracle HTTP Server and accessed page as below:
          http://<server>:7777/SimpleServlet/Simple
where Simple is servlet in SimpleServlet.war file.
In the browser, The page cannot be found is shown to user. I have verified that SimpleServlet.war is extracted to SimpleServlet folder under <ora9ias_home>\j2ee\home\applications folder. I found that Simple.class is stored under WEB-INF/classes folder and web.xml contains correct entry for url pattern for servlet Simple.
What else could be the problem? Am I placing the war file in wrong place or modfiying application.xml or default-web-site.xml in a wrong directory?
This is very urgent. Please help me with your valuable comments on this.
Thanks in advance.
Regards,
Sandesh

Hi Juliana,
Thanks a lot for your suggestion.
I am sorry if I have posted this message to a wrong forum. This is first time I am posting a message to OTN. I will resend message to J2EE forum as per you suggestion.
Meanwhile, please note information you asked for is as below:
I installed Oracle9iAS J2EE and Web Cache v9.0.3 on Windows 2000 server.
It includes:
     - Oracle HTTP Server
     - Oracle9iAS Containers for J2EE
     - Oracle9iAS Web Cache
     - Oracle Enterprise Manager
The release of installed Oracle9iAS is Release 2 (9.0.3)
Please do reply at the earliest.
Once again thanks and look forward to hear from you.
Regards,
Sandesh

Run a simple servlet in WLS6.1

          Hi,
          I am new to WLS 6.1
          I have a simple servlet that outputs a string on webpage.
          I am trying to run this servlet using the WLS6.1
          I have compiled the source code and copied the class file (MyFirstServlet.class)
          into
          D:\BEA\wlserver6.1\config\mydomain\applications\DefaultWebApp\WEB-INF\classes
          I have the web.xml file in web-inf directory as below
          <?xml version="1.0" ?>
          <!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> HelloWorld </servlet-name>
               <servlet-class> HelloWorld</servlet-class>
          </servlet>
          <servlet-mapping>
               <servlet-name> HelloWorld </servlet-name>
               <url-pattern> HelloWorld </url-pattern>
          </servlet-mapping>
          <welcome-file-list>
          <welcome-file>index.html</welcome-file>
          </welcome-file-list>
          <servlet> <servlet-name> MyFirstServlet </servlet-name> <servlet-class> MyFirstServlet
          </servlet-class> </servlet>
          <servlet-mapping> <servlet-name> MyFirstServlet </servlet-name> <url-pattern>
          MyFirstServlet </url-pattern> </servlet-mapping>
          </web-app>
          HelloWorls is also another simple servlet.
          then in the browser I give
          http://localhost:7001/MyFirstServlet
          this is the error I get
          Error 404--Not Found
          From RFC 2068 Hypertext Transfer Protocol -- HTTP/1.1:
          10.4.5 404 Not Found
          The server has not found anything matching the Request-URI. No indication is given
          of whether the condition is temporary or permanent.
          If the server does not wish to make this information available to the client,
          the status code 403 (Forbidden) can be used instead. The 410 (Gone) status code
          SHOULD be used if the server knows, through some internally configurable mechanism,
          that an old resource is permanently unavailable and has no forwarding address.
          what is the problem?
          Please anyone help me in this matter!
          Thanks in Advance
          SP


          Hi,
          I am new to WLS 6.1
          I have a simple servlet that outputs a string on webpage.
          I am trying to run this servlet using the WLS6.1
          I have compiled the source code and copied the class file (MyFirstServlet.class)
          into
          D:\BEA\wlserver6.1\config\mydomain\applications\DefaultWebApp\WEB-INF\classes
          I have the web.xml file in web-inf directory as below
          <?xml version="1.0" ?>
          <!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> HelloWorld </servlet-name>
               <servlet-class> HelloWorld</servlet-class>
          </servlet>
          <servlet-mapping>
               <servlet-name> HelloWorld </servlet-name>
               <url-pattern> HelloWorld </url-pattern>
          </servlet-mapping>
          <welcome-file-list>
          <welcome-file>index.html</welcome-file>
          </welcome-file-list>
          <servlet> <servlet-name> MyFirstServlet </servlet-name> <servlet-class> MyFirstServlet
          </servlet-class> </servlet>
          <servlet-mapping> <servlet-name> MyFirstServlet </servlet-name> <url-pattern>
          MyFirstServlet </url-pattern> </servlet-mapping>
          </web-app>
          HelloWorls is also another simple servlet.
          then in the browser I give
          http://localhost:7001/MyFirstServlet
          this is the error I get
          Error 404--Not Found
          From RFC 2068 Hypertext Transfer Protocol -- HTTP/1.1:
          10.4.5 404 Not Found
          The server has not found anything matching the Request-URI. No indication is given
          of whether the condition is temporary or permanent.
          If the server does not wish to make this information available to the client,
          the status code 403 (Forbidden) can be used instead. The 410 (Gone) status code
          SHOULD be used if the server knows, through some internally configurable mechanism,
          that an old resource is permanently unavailable and has no forwarding address.
          what is the problem?
          Please anyone help me in this matter!
          Thanks in Advance
          SP

Need help with getResource() problem under weblogic 6.1

Hey all,
          I've got a serious problem that I can't figure out. This should be really
          simple - but it's alluding me. I have an ear file with a number of servlets
          inside it. This ear file also contains a resource that my servlets want to
          read from. This resource is located (within the ear file) at:
          "/content/structure/a.txt". The file contains raw ascii.
          To have my serlvet read from this file, I thought it would be as simple as:
          URL content =
          servlet.getServletContext().getResource("/content/structure/a.txt");
          // pw is an instance of PrintWriter
          pw.print(content.getContent());
          However, when I execute the above I get the following exception:
          java.lang.NullPointerException
          at
          java.net.URLConnection.stripOffParameters(URLConnection.java:1011)
          at java.net.URLConnection.getContentHandler(URLConnection.java:979)
          at java.net.URLConnection.getContent(URLConnection.java:581)
          OK, so fine - I figure that I'm new to this. The documentation for the URL
          class tells me there is another way around this. It says that rather then
          calling getContent() directly, I can open a stream on the URL and read from
          that, like so:
          URL content =
          servlet.getServletContext().getResource("/content/structure/scenario2resourc
          es.txt");
          FileInputStream fis = content.openStream();
          but when I do this I get the following different exception:
          java.lang.ClassCastException: weblogic.utils.zip.SafeZipFileInputStream^M
          at Utility.writeFileToOutput(Utility.java:134)^M
          Apparently this thing is trying to return a web-logic-specific stream (which
          is incompatible with an FileInputStream) - which I don't want to use or
          learn about since I want my stuff to work under other webservers.
          Can anyone tell me what I'm doing wrong? This should be simple.
          -john
          John Hilgedick
          WisdomTools, Inc.
          [email protected]


Wenjin,
          I appreciate your response. I tried treating it as a normal InputStream -
          but it didn't make any difference. Here's what I did:
          URL content =
          servlet.getServletContext().getResource("/content/structure/scenario2resourc
          es.txt");
          InputStream is = (InputStream)content.getContent();
          And here's the exception:
          java.lang.NullPointerException^M
          at
          java.net.URLConnection.stripOffParameters(URLConnection.java:1011)^M
          at
          java.net.URLConnection.getContentHandler(URLConnection.java:979)^M
          at java.net.URLConnection.getContent(URLConnection.java:554)^M
          at java.net.URL.getContent(URL.java:807)^M
          at Utility.writeFileToOutput(Utility.java:134)^M
          You can see that it is definitely breaking somewhere in getContent().
          If you have any other ideas, I'd appreciate hearing about them.
          -john
          ----- Original Message -----
          From: "Wenjin Zhang" <[email protected]>
          Newsgroups: weblogic.developer.interest.servlet
          Sent: Wednesday, November 20, 2002 5:03 PM
          Subject: Re: Need help with getResource() problem under weblogic 6.1
          >
          > The "/" in getServletContext().getResource("/content/structure/a.txt")
          means the
          > web (WAR) application root, not your EAR root.
          >
          > The ClassCastException is because that content.openStream() is not
          FileInputStream
          > and has nothing to do with Weblogic. You should treat it as normal
          InputStream.
          >
          >
          > "John Hilgedick" <[email protected]> wrote:
          > >Hey all,
          > >
          > >I've got a serious problem that I can't figure out. This should be
          really
          > >simple - but it's alluding me. I have an ear file with a number of
          servlets
          > >inside it. This ear file also contains a resource that my servlets want
          > >to
          > >read from. This resource is located (within the ear file) at:
          > >"/content/structure/a.txt". The file contains raw ascii.
          > >
          > >To have my serlvet read from this file, I thought it would be as simple
          > >as:
          > >
          > >URL content =
          > >servlet.getServletContext().getResource("/content/structure/a.txt");
          > >// pw is an instance of PrintWriter
          > >pw.print(content.getContent());
          > >
          > >However, when I execute the above I get the following exception:
          > >
          > >java.lang.NullPointerException
          > > at
          > >java.net.URLConnection.stripOffParameters(URLConnection.java:1011)
          > > at
          java.net.URLConnection.getContentHandler(URLConnection.java:979)
          > > at java.net.URLConnection.getContent(URLConnection.java:581)
          > >
          > >OK, so fine - I figure that I'm new to this. The documentation for the
          > >URL
          > >class tells me there is another way around this. It says that rather
          > >then
          > >calling getContent() directly, I can open a stream on the URL and read
          > >from
          > >that, like so:
          > >
          > >URL content =
          >
          >servlet.getServletContext().getResource("/content/structure/scenario2resour
          c
          > >es.txt");
          > >FileInputStream fis = content.openStream();
          > >
          > >but when I do this I get the following different exception:
          > >
          > >java.lang.ClassCastException: weblogic.utils.zip.SafeZipFileInputStream^M
          > > at Utility.writeFileToOutput(Utility.java:134)^M
          > >
          > >Apparently this thing is trying to return a web-logic-specific stream
          > >(which
          > >is incompatible with an FileInputStream) - which I don't want to use
          > >or
          > >learn about since I want my stuff to work under other webservers.
          > >
          > >Can anyone tell me what I'm doing wrong? This should be simple.
          > >
          > >-john
          > >
          > >
          > >--
          > >John Hilgedick
          > >WisdomTools, Inc.
          > >[email protected]
          > >
          > >
          >

Help! Simple Servlet Problem

Similar Messages

Maybe you are looking for