Forum:

Servlets

First helloWorld servlet program

Ranch Hand

Posts: 168

posted 11 years ago

Number of slices to send:

Optional 'thank-you' note:

Send

Hi,
I am trying to make my first java servlet.
Its a simple hello world program. A button is clicked and this takes you to a new page displaying the message hello world.
When i run it i get an error page HTTP 404
The requested resource () is not available.
So i assume there is something wrong with my code.

Start page

Servlet

XML

Bear Bibeault

Sheriff

Posts: 67750

173

I like...

posted 11 years ago

Number of slices to send:

Optional 'thank-you' note:

Send

Your form action is prefixed with "/servlets". That's not part of the mapping in the deployment descriptor. Why is it there?

Your form action should be prefixed with the context path. I assume that that's not "/servlets"?

[Asking smart questions] [About Bear] [Books by Bear]

HTML 5 (verified skill)
Skill verified by Jeanne Boyarsky

CSS 3 (verified skill)
Skill verified by Jeanne Boyarsky

JavaScript (verified skill)
Skill verified by Jeanne Boyarsky

Bear Bibeault

Sheriff

Posts: 67750

173

I like...

posted 11 years ago

Number of slices to send:

Optional 'thank-you' note:

Send

And, I realize that this is a learning exercise, but in the real world, servlets should never be used to emit HTML.

[Asking smart questions] [About Bear] [Books by Bear]

tom davies

Ranch Hand

Posts: 168

posted 11 years ago

Number of slices to send:

Optional 'thank-you' note:

Send

I have my servlet in a package named servlets in netbeans. I wrongly thought i would navigate to it using /servlets/ . .
It has worked now i just have the servlet name.
I have also just changed it to out.println("message"); instead of the html
Thanks

Bear Bibeault

Sheriff

Posts: 67750

173

I like...

posted 11 years ago

1
Number of slices to send:

Optional 'thank-you' note:

Send

tom davies wrote:I have my servlet in a package named servlets in netbeans. I wrongly thought i would navigate to it using /servlets/ . .

Right -- the package has nothing to do with the URL mapping.

It has worked now i just have the servlet name.

Warning! This will only work when the web app is the root web app. You should always fetch and include the context path when forming URLs in web pages (such as for images and form actions). For the root web app, the context path just happens to be the empty string. Your app will break if the app is depoyed using a differnt context path.

See the JspFaq for how to fetch the context path in a JSP.

I have also just changed it to out.println("message"); instead of the html

Emitting HTML is fine while you are learning. I just wanted to make sure it did not become a bad habit that you'll need to unlearn later.

[Asking smart questions] [About Bear] [Books by Bear]

Maybe he went home and went to bed. And took this tiny ad with him:

We need your help - Coderanch server fundraiser

https://coderanch.com/wiki/782867/Coderanch-server-fundraiser