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Calling a servlet from an HTML page

And Green
Greenhorn

Joined: Sep 28, 2007
Posts: 26
This question will probably make the more experienced users of servlets laugh due it's simplicity/stupidity!

If my form action in an HTML page is :

<FORM ACTION="/servlet/HelloYall">

and my servlet is in the directory:

apache_install_dir\Tomcat 5.5\webapps\ROOT\WEB-INF\classes

Where should I run my HTML from, for the path to the servlet to be valid?

Thanks in advance!
Bear Bibeault
Author and ninkuma
Marshal

Joined: Jan 10, 2002
Posts: 60781
    
  65

You map the path to the servlet in the web.xml and use that. It is independent of the location of the HTML page.


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Yogendra Joshi
Ranch Hand

Joined: Apr 04, 2006
Posts: 213
Hello ,

Any question asked here at Ranch isnt a stupid question. We are all learners here and its always a pleasure helping.

now , to the main point ,

in web.xml file , you have an element called <servlet> which has child elements called <servlet-name> and <servlet-class> , You can give any name you want to the <servlet-name> , however you need to give fully qualified classname for the <servlet-class> element , If your servlet resides inside WEB-INF/classes folder , then simply the name of the java class would suffice and as Bear told , once this entry is done you need to map your java class to a URL Pattern which will be accessed from your HTML page.

For URL mapping also , there is a tag called <servlet-mapping> which further has to 2 child elements called <servlet-name> and <url-pattern>

So , If your servlet name is TestHelloWorld, then you need to have these entries in your web.xml



So now from your HTML page , if you have an form action like below then it would hit your Servlet and execute the logic written inside this.

<form action="/hello/abc" method="post">
<input type="Submit" value="Get Value from My First Servlet" />
</form>

Hope this helps.
Yogendra Joshi.


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