Tomcat Tutorial: HelloWorld for Complete Fools [English]

15Jan/0497

Tomcat Tutorial: HelloWorld for Complete Fools [English]

The following tutorial was translated into English from the German original on this site, which is also available here. Please excuse me for my poor english skills, I am not a native speaker.

Update 26.02.2007: Note, that this Article, though technically still relevant and valid, is not up to date with the progress of the eclipse platform. I created a screencast to reflect the changes that took place and to show you development with the Eclipse WTP. Click here for the article.

I know quite a number of java developers who, despite their good knowledge of the java platform, somehow failed to successfully deploy a new Servlet to a Apache Tomcat installation. I stress, that they did not fail because of their inferior skills, but because of the fact, that there is no comprehensive
resource out there that explains the Tomcat deployment procedure:

in a nutshell
with pictures
without going into details that aren't of direct interest

So, without much further ado, I will try to explain how to install tomcat, create a deployment structure using Eclipse and writing a simple HelloWorld Servlet.

In theory, deploying a Servlet is a really straightforward task - that is, if you know somebody who is willing to introduce you into the deployment mysticisms of the Apache Tomcat development. Unfortunately, I knew nobody who was really adroit with that. So I spent a really long time running into every single ambush Tomcat has to offer for blue eyed newbies. Hence I can rightly say, that Tomcat's configuration is a pain in the rear if you don't have an expert person who guides you through your very first steps. Even if you know your Google search words cold, you won't find a single document that makes your task seem trivial.

So I figured, it would be best for newbies and the like, if you could just follow an example with pictures in it. In the following tutorial, I will try to explain the deployment procedure from the very beginning in step-by-step fashion to build a standard "Hello World" Servlet. To accomplish this, I will use the Eclipse IDE and Eclipse specific plugins, but I hope that one can understand the general proceeding that is necessary for other IDEs as well. I will assume that you are familiar with the installation of eclipse and eclipse plugins.

The following software will be neccessary to follow the tutorial:

Tomcat Servlet Container

The Server

Especially for Windows users it's pretty easy to install Tomcat, because there it has a straightforward installer script that rids you of most of the configuration work. Everything you have to do is set the Administrator password (and remember it!) and the installation directory (and remember it!).

The Plugin

The Sysdeo Tomcat Plugin is our best friend. After you have installed it, you will notice these buttons and menues in your IDE.

The left button starts Tomcat, the middle button stops it, the right button restarts Tomcat. Right now, they won't work if you press them. To enable them, you first need to configure a few things. Go to the menu "Window-> Preferences" there, you will see this dialogue box.

Enlarge

Now you need to go to the menu item "Tomcat" and select your Tomcat version. At the time of writing that would be the 4.1 5.x version. Now we adjust the field "Tomcat Home" to point to the install directory that we selected before at install time. The Sysdeo plugin now knows where to look for the server.xml file and automatically assumes the standard path to look for the file. Eclipse is now able to manage this configuration file, i.e. add a new <context> for a new application.

The Tomcat servlet container, features multiple user roles, such as the "Administrator" that we have already added to the user configuration upon installation. All users and passwords are found (in plain text, so take care to handle this safely) in the conf/tomcat-users.xml file. We now need to add another user called "Manager" that was not added to the file at installation time. Therefor we scroll down the menu point "Tomcat" and click the item "Tomcat Manager App". Now we can add a username and a password for the manager. Subsequently we click on "Add user to tomcat-users.xml" and leave the configuration menu.

Enlarge
Now we are ready to test start our Tomcat server. Click on the start button in the Tomcat menu and watch the console output. If Tomcat boots up without any stacktraces open your browser, and try to open the following address http://localhost:8080/ . If you see an image
that is similar, to the one below everything is working okay. If it doesn't you might want to Google on what might have caused the stacktrace.

Hello World

For now, we stop out Tomcat server and take a look at our very own, first servlet. First, we need to open a new project in the navigator window.

In the project window we select "Tomcat Project"...

...click on the Next button and call our new project "Hello World"

After a click on the next Button we now can adjust under which URI (Uniform Resource Identifier) we want our new application to respond to our requests. To illustrate what part of the URL this is, just take a look at the fat part in the following address: http://localhost:8080/HelloWorld/hello.
The default adjustments on the other controls should be fine by now, so we don't bother to adjust them. They should look similar to following image.

Enlarge
If we now "Finish" the Wizard, we can see, that Eclipse has created a whole bunch of new directories. It should look similar to this:

Now we can create a new class named HelloServlet in the directory WEB-INF/src. Now we can copy and paste following code into this class.

import java.io.*;

import javax.servlet.http.*;
import javax.servlet.*;

public class HelloServlet extends HttpServlet {
  public void doGet (HttpServletRequest req,
                                         HttpServletResponse res)
        throws ServletException, IOException
  {
        PrintWriter out = res.getWriter();
        out.println("Hello, Brave new World!");
        out.close();
  }
}

Our View should now look like this:

Enlarge
Unfortunately we are not yet finished. We still need to create the web.xml descriptor, which contains certain elements of configuration specific to our application and the server behaviour. So we create the file web.xml in the directory WEB-INF (Note: not in the directory WEB-INF/src !!!). For our simple application, the following parameters should be fine.

<!DOCTYPE web-app PUBLIC
  '-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN'
  'http://java.sun.com/dtd/web-app_2_3.dtd'>
<web-app>
  <servlet>
    <servlet-name>hello</servlet-name>
    <servlet-class>HelloServlet</servlet-class>
  </servlet>

  <servlet-mapping>
    <servlet-name>hello</servlet-name>
    <url-pattern>/hello</url-pattern>
  </servlet-mapping>
</web-app>

What follows now is a little explanation of what we just copied and pasted into web.xml . The Doctype is an xml specific item that tells the xml parser where to look
for the dtd consistency rules for our xml document. The dtd ensures that no wrong parameter combinations are entered. The main tag <web-app> contains all preferences for our servlet. The <servlet> tag basically contains the name (<servlet-name>) that will be used throughout the xml document to reference our servlet and its linked class (<servlet-class>) . The tag <servlet-mapping> is responsible for telling the server, to what document name in the URL our application should respond to. Note, that the correct order of these tags has to be retained to form a valid web.xml descriptor. If we followed all steps correctly, we should now be able to fire up Tomcat again. Our workspace should now look like that:

Enlarge
So, if we now enter the right combination of URI and resource name into the address bar of our browser (in our case this would actually be http://localhost:8080/HelloWorld/hello) we should be able to see the output from our very first servlet. Congratulations, now you are in the game

Enlarge
Oh, yeah - if you want to enable your Tomcat engine to serve JSPs too, you just have to add the following lines to the web.xml file and put the jsp files in the top level directory of your eclipse project.

    <servlet>
        <servlet-name>jspAssign</servlet-name>
        <servlet-class>org.apache.jasper.servlet.JspServlet</servlet-class>
        <init-param>
            <param-name>logVerbosityLevel</param-name>
            <param-value>WARNING</param-value>
        </init-param>
        <init-param>
            <param-name>fork</param-name>
            <param-value>false</param-value>
        </init-param>
        <load-on-startup>3</load-on-startup>
    </servlet>

    <servlet-mapping>
        <servlet-name>jspAssign</servlet-name>
        <url-pattern>/*.jsp</url-pattern>
    </servlet-mapping>

For further reading, I recommend following Sites:

Tomcat 4.1 Documentation
Advanced JSP and Servlet Tutorial

Filed under: Coding, Tutorial Leave a comment

Comments (97) Trackbacks (1) ( subscribe to comments on this post )

Anonymous
November 26th, 2004 - 16:37

not native
Hi,
You wrote “xcuse me for my poor english skills, I am not a native speaker”.
So you are not native, then you must me “emulated”, aren’t you?
Me not native too.

Good tutorial. There are several similar tutorials, this one has added value bacause it addresses to web.wml configuration step.

Anyway it didn’t work for me. For some reason is keeps returning a “not available” Tomcat error page:
“El recurso requerido (/HelloWorld/hello) no estÃ¡Â¡ disponible” (The requested resource blah not available).
Most other tutorials did the same. I can’t find out what the reason is.

Juan Lanus
TECNOSOL
Argentina
Anonymous
November 26th, 2004 - 19:26

not native again
Hi,
After writing my former comment I deleted all of the eclipse and tomcat files in my disk and reinstalled it all disregarding prior configuration files.
Then it worked like a charm saludating this brave neue welt!
It’s Eclipsr Version: 3.0.1 Build id: 200409161125, Tomcat 5.0.30 and Sysdeo’s Tomcat plugin version 3 as of 2004-11-26.
Thanks a lot!
–
Juan Lanus
TECNOSOL
Argentina
Anonymous
August 11th, 2006 - 06:59

“No UserDatabase component found under key UserDatabase” solved
I had the same problem. Got “No UserDatabase component found under key UserDatabase” after messing around with Eclipse. I run tomcat5 on CentOS and Eclipse on WindowsXP.

It was some sort of permission problem. This solved it for me:

chown -R tomcat4:tomcat4 /usr/share/tomcat5
Anonymous
June 15th, 2005 - 15:29

Tomcat problem
java.lang.NullPointerException
at com.sysdeo.eclipse.tomcat.TomcatPreferencePage.performOk

Didi you solve teh problem ?
What was the solution/fix/workaround ?

thanks / Massimo
Anonymous
June 15th, 2005 - 14:42

regardin web.xm
The tomcat project does not create automatically web.xml file.
We are made to make web.xml file manually and make entries for the servlet.
Is this the right behaviour of the tomcat plugins.
Anonymous
June 15th, 2005 - 15:19

Errors when setting the Tomcat preferences in Eclipse

I have the very same problem.
Did you solve it ?
What was teh solution/workaround to solve it ?
Just let me have a feedback ..

thakns / regards / Massimo

SDK :
C:\j2sdk1.4.2_05

Sysdeo Tomcat Launcher: version 2.2.1

Eclipse Platform Version: 3.0.2

Tomcat Version: Apache Tomcat/5.0.30
Using CATALINA_TMPDIR: C:\jetspeed\jakarta-tomca
(Jetspeed 2, M3 on Tomcat 5.0.30)

Hi,

I have problems (Null Pointer Exception) when trying to set the Tomcat preferences in Eclipse (Window –> Preferences –> Tomcat).

Sometimes, already by clicking on “Tomcat” an exception occours
(see Ex.1 here below) then when saving the settings (on “OK”)
another exception occours (see Ex.2 here below).

Do you know the reasons ? already experienced ? any solution ?

***************************
Ex. 1
***************************

ERROR MESSAGE IN ERROR DIALOG on “Tomcat”:
“The currently displayed page containes invalid values”

ERROR MESSAGE IN ERROR LOG on “Tomcat”:

java.lang.NullPointerException

java.lang.NullPointerException
at com.sysdeo.eclipse.tomcat.TomcatPreferencePage.performOk(TomcatPreferencePage.java:160)
at org.eclipse.jface.preference.PreferenceDialog$11.run(PreferenceDialog.java:746)
at org.eclipse.core.internal.runtime.InternalPlatform.run(InternalPlatform.java:616)
at org.eclipse.core.runtime.Platform.run(Platform.java:747)
at org.eclipse.jface.preference.PreferenceDialog.okPressed(PreferenceDialog.java:728)
at org.eclipse.jface.preference.PreferenceDialog.buttonPressed(PreferenceDialog.java:199)
at org.eclipse.ui.internal.dialogs.WorkbenchPreferenceDialog.buttonPressed(WorkbenchPreferenceDialog.java:75)
at org.eclipse.jface.dialogs.Dialog$2.widgetSelected(Dialog.java:506)
at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:89)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:82)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:796)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:2773)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2432)
at org.eclipse.jface.window.Window.runEventLoop(Window.java:668)
at org.eclipse.jface.window.Window.open(Window.java:648)
at org.eclipse.ui.internal.OpenPreferencesAction.run(OpenPreferencesAction.java:72)
at org.eclipse.jface.action.Action.runWithEvent(Action.java:881)
at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:915)
at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:866)
at org.eclipse.jface.action.ActionContributionItem$7.handleEvent(ActionContributionItem.java:785)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:82)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:796)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:2773)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2432)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:1377)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:1348)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:254)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:141)
at org.eclipse.ui.internal.ide.IDEApplication.run(IDEApplication.java:96)
at org.eclipse.core.internal.runtime.PlatformActivator$1.run(PlatformActivator.java:335)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:273)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:129)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.core.launcher.Main.basicRun(Main.java:185)
at org.eclipse.core.launcher.Main.run(Main.java:704)
at org.eclipse.core.launcher.Main.main(Main.java:688)

***************************
Ex. 2
***************************

ERROR MESSAGE IN ERROR DIALOG on “OK”:
“An error has occoured. See error log for more details.”

ERROR MESSAGE IN ERROR LOG on “OK”:

Problems occurred when invoking code from plug-in: “org.eclipse.core.runtime”.

java.lang.NoSuchMethodError: org.eclipse.jdt.internal.ui.wizards.dialogfields.ListDialogField.setElements(Ljava/util/List;)V
at com.sysdeo.eclipse.tomcat.editors.ProjectListEditor.updateProjectsList(ProjectListEditor.java:65)
at com.sysdeo.eclipse.tomcat.editors.ProjectListEditor.(ProjectListEditor.java:39)
at com.sysdeo.eclipse.tomcat.TomcatPreferencePage.createContents(TomcatPreferencePage.java:123)
at org.eclipse.jface.preference.PreferencePage.createControl(PreferencePage.java:217)
at org.eclipse.jface.preference.PreferenceDialog$12.run(PreferenceDialog.java:1008)
at org.eclipse.core.internal.runtime.InternalPlatform.run(InternalPlatform.java:616)
at org.eclipse.core.runtime.Platform.run(Platform.java:747)
at org.eclipse.jface.preference.PreferenceDialog.showPage(PreferenceDialog.java:1003)
at org.eclipse.jface.preference.PreferenceDialog$8.selectionChanged(PreferenceDialog.java:529)
at org.eclipse.jface.viewers.StructuredViewer$3.run(StructuredViewer.java:450)
at org.eclipse.core.internal.runtime.InternalPlatform.run(InternalPlatform.java:616)
at org.eclipse.core.runtime.Platform.run(Platform.java:747)
at org.eclipse.jface.viewers.StructuredViewer.firePostSelectionChanged(StructuredViewer.java:448)
at org.eclipse.jface.viewers.StructuredViewer.handlePostSelect(StructuredViewer.java:708)
at org.eclipse.jface.viewers.StructuredViewer$5.widgetSelected(StructuredViewer.java:726)
at org.eclipse.jface.util.OpenStrategy.firePostSelectionEvent(OpenStrategy.java:200)
at org.eclipse.jface.util.OpenStrategy.access$4(OpenStrategy.java:195)
at org.eclipse.jface.util.OpenStrategy$3.run(OpenStrategy.java:349)
at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:106)
at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:2750)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2435)
at org.eclipse.jface.window.Window.runEventLoop(Window.java:668)
at org.eclipse.jface.window.Window.open(Window.java:648)
at org.eclipse.ui.internal.OpenPreferencesAction.run(OpenPreferencesAction.java:72)
at org.eclipse.jface.action.Action.runWithEvent(Action.java:881)
at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:915)
at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:866)
at org.eclipse.jface.action.ActionContributionItem$7.handleEvent(ActionContributionItem.java:785)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:82)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:796)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:2773)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2432)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:1377)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:1348)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:254)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:141)
at org.eclipse.ui.internal.ide.IDEApplication.run(IDEApplication.java:96)
at org.eclipse.core.internal.runtime.PlatformActivator$1.run(PlatformActivator.java:335)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:273)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:129)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.core.launcher.Main.basicRun(Main.java:185)
at org.eclipse.core.launcher.Main.run(Main.java:704)
at org.eclipse.core.launcher.Main.main(Main.java:688)
Anonymous
October 22nd, 2007 - 02:18

this is the best it solve my servlet problem
Mario
October 22nd, 2007 - 22:05

I am using eclipse Version: 3.3.1, and Tomcat/5.5.17.

I was getting the following error with my web.xml
Unexpected element “{}web-app” {antlib:org.apache.tools.ant}web-app
and it looked like eclipse was interpretting this file as an ant file versus a web file descriptor.

My servlet was not coming up so I searched for a while and did not find an answer.
I did find from another guy who apparently got distracted by this message that to run the servlet directly you needed to add the servlet keyword in the URL.

That ended up working for me, than I realized that by playing with the object name I had tricked myself. Long story short, there are two URLs I could use to run the servlet and the error above did not seem to be significant.

In my case since I used “MytomcatProject” as the name of my project, myHello as a servlet name and MyServletPattern as mapping name so I can direct link to it.

Here is my web.xml file

myHello
HelloServlet

myHello
/MyServletPattern

Here are the two URLs that will run the servlet:

http://localhost:8080/MytomcatProject/MyServletPattern

or directly without the mapping set in web.xml

http://localhost:8080/MytomcatProject/servlet/myHello

and using the class name also works

http://localhost:8080/MytomcatProject/servlet/HelloServlet

cheers,
Liviu
November 24th, 2007 - 13:13

Hello. I’m using tomcat and I followed the tutorial. GREAT TUTORIAL! But there seems to be an error in the web.xml file in the section

jspAssign
/*.jsp

I had to change url-pattern from /*.jsp to *.jsp in order for tomcat to start, otherwise it would’n start do to “severe errors”.
Aania
November 26th, 2007 - 06:23

Real gud tutoial dude…

I’ve followed all ur steps…

But am still getting the below lines…

HTTP Status 404 – /HelloWorld/hello

——————————————————————————–

type Status report

message /HelloWorld/hello

description The requested resource (/HelloWorld/hello) is not available.

Wud be real nice if smeone cud come up wit some solution for tht…
Mitch
December 5th, 2007 - 02:27

Hi,
I am using apache and eclipse for the first time. I am running into an issue. When I create the HelloServlet.java class, a yellow icon with a question mark appears on top on my web-inf, package, and class. I also notice a yellow line appears under the class name HelloWorld. I place the curso on top of it, and I saw the message below:
“The serializable class HelloServlet does not declare a static final serialVersionUID field of type long”. I am not sure what I did wrong. When I paste the url in the browser, it does not show the message. It shows me an error 404.
I am using eclipse 3 with tomcat 6 and java 5.
P.S. I started tomcat, and all the jsp and html samples are working fine.
Mahesh
December 19th, 2007 - 16:44

Hi,
This is really a good Tutorial for the Learners.Thanks for the Tutorial.
janakadalugama
January 3rd, 2008 - 03:42

Thank you , I did and got idea how tomcat plug with eclipse and
and develop a project.
olly
March 17th, 2008 - 13:35

thanks. excellent tutorial – well communicated – went very smooth!
d and j
March 24th, 2008 - 21:17

THANK YOU THANK YOU THANK YOU THANK YOU!!!!!
You just saved us numerous hours of work! more time for pizza!

Thanks again!
anoymous
March 26th, 2008 - 15:31

THANK YOU!!!!!!! Very concise and very easy to follow…
Vasily
March 31st, 2008 - 03:23

Hi,

I’ve been using Tomcat plugin for a while and I’ve just noticed that eclipse console output is not respecting System.out/err color settings.

Here is simple example:
System.out.println(“test out”);
System.err.println(“test err”);

If you run this code as stand alone java app than output would be:
test out <– black
test err <– red

If you run it within your webapp running with tomcat plugin output would be:
test 1 out <– black
test 1 err <– black

Do you know why?

Thank you,
Vasily
peter
April 5th, 2008 - 12:56

Hi,

is there any way to define the OS-user under which the tomcat process will run?
Under Lunix this plugin does not work because tomcat runs under the login-user und not the tomcat-user.
Karen
November 2nd, 2008 - 07:40

Thank you soooo much! This make it so much simpler.
I did have to look under /conf/Catalina/localhost to get the correct reference of my project to then enter in localhost:8080//hello (from your example).
Thank you again! I have been programming in Java for years and years, but setting up a tomcat server with eclipse I found to be surprisingly tricky )
Nguon TAING
November 13th, 2008 - 15:49

Hi,

it is a good tutorial. thanks BIG BIG

Nguon
Wang Zhi
December 17th, 2008 - 05:28

Very good!
Mariem
December 17th, 2008 - 22:14

Hi,

Thx a lot for this tutorial

Mariem
Naresh
December 18th, 2008 - 09:11

great tutorial..i was just lookin for this kind of tutorial..web app development demystified for newbies..
Mals
January 16th, 2009 - 12:12

I tried to create the Project and I am unable to view the classes folder under WEB-INF directory from eclipse and also the Web.xml doesnt display with XML icon and infact when i tried to invoke from browser it displays Page not found error.(404) Can some one help me to solve this problem
Thank You Very Much..
January 28th, 2009 - 11:28

Hi…
Thanks alot. Really, I was fighting for long time but I could not build a single App. Screen shots are really helpful.
Uma
February 25th, 2009 - 09:18

Hi! very helpful tutorial…but I have a problem when I am trying to run this HelloWorld I am getting an error saying “The archive: C:/Program Files/Apache Software Foundation/Tomcat 4.1/bin/bin/bootstrap.jar which is referenced by the classpath, does not exist.” I guess I messed up while setting the paths …can u pls help me out…am new to this servlet programming and tomcat..
Thanx in advance
Nick
February 26th, 2009 - 17:14

Works perfect.
That tomcat plugin is exactly what i needed.
shwetha
February 27th, 2009 - 07:14

Thanks it helped me to run my helloworld using Eclipse

Can you tell how to run servlet if it is in some package .as in this case it is in default package in web-inf folder
Dee
April 22nd, 2009 - 15:24

Awesome Tutorial man.

I followed your instructions and have created my first servlet. A quick note for those who apparently did everything right but got a “resource HelloWorld/hello could not be found” message.

Check for spelling error – Don’t forget the space between “Hello” and “World” when typing in the URI.

Also, if you didn’t set Eclipse workspace to point to the webapps directory in your Tomcat installation folder, be sure to copy the Hello World application from the workspace and paste it inside the webapps directory.

These may save some people precious hours.
Stanislav
May 6th, 2009 - 12:40

This helped me get started, thank you!
Dorel de la Craiova
June 2nd, 2009 - 17:50

Thanks a lot, it was extremly useful, I have a deadline and this tutorial save mai a$$ in record time. Well done !
Tech Freaks
July 13th, 2009 - 16:47

Nice article.

You may wanted to check some similar articles below:
http://www.tech-freaks.in/Java-Programming/JSP-Servlets/jsp-servlet-workshop.html
http://www.tech-freaks.in/Java-Programming/JSP-Servlets/eclipse-tomcat-integration.html
Dorothy
July 16th, 2009 - 09:32

Thanks so much for this beginner tutorial. I didn’t know where to start and this has got me up and running very quickly.
Nahuel
September 16th, 2009 - 13:11

Great tutorial. I was all the morning try to do it by my own and with this 10 minutes!!! Great explanation
dana
October 9th, 2009 - 14:06

which is the link where I can find the Sysdeo Eclipse Tomcat Launcher plugin?
Michelle
October 28th, 2009 - 18:39

This tutorial answered some problems I had, but I did this after some reading. I understood the file directory structures and the servlet and xml file necessity. I could have done it w/o any background, but it was a great tutorial for step by step application of the theory I read.
Trevor
January 13th, 2010 - 21:38

Great tutorial, very useful! As a beginner i was able to pick it up very fast and it is well laid out. Reading the comments answered any other questions that i had. Thank you very much
Timothy Anderson
January 29th, 2010 - 01:49

Good tutorial. I can now successfully execute a Hello World. I am actually integrating tomcat eclipse and hoping that you could provide a resource on this– the one I linked to isn’t that great.
eastcoaster
January 30th, 2010 - 02:07

excellent tutorial! even using tomcat 6.x this still worked goood, thanks so much
Hitesh
February 2nd, 2010 - 08:18

Hello. I’m using tomcat and I followed the tutorial. GREAT TUTORIAL! But there seems to be an error in the web.xml file in the section

jspAssign
/*.jsp

I am getting “severe errors”.
Mads
February 10th, 2010 - 09:16

Simple but so valuable man!
My life has just become so much easier…
/Mads
mk
February 10th, 2010 - 22:19

Excellent tutorial…very descriptive
charan
March 3rd, 2010 - 16:09

can any one help me how to deploy an application similar to the one mentioned iin this page in ubuntu using context.xml file. im really struggling with it for my college project. can anyone help
adult vod
March 7th, 2010 - 04:59

would it be possible to translate your website into spanish because i have difficulties of speaking to english, and as there are not many pictures on your website i would like to read more of what you are writting .
Mayur
March 13th, 2010 - 01:14

Thank you so much. It was really helpful…
Mayur
March 13th, 2010 - 01:15

@Dana – The sysdeo plugin url no longer works. Try this instead
http://www.eclipsetotale.com/tomcatPlugin.html#A3
satish
May 4th, 2010 - 07:13

Hi All,

I have deployed an application in tomcat 5.5 and added required workdir and docbase details via server.xml.

Now i am deploying another application which is modified of the previous one but when i am doing it is automatically take deploy location to be the previous one.

Please help if anyone has idea on this…………….

Regards
Satish.