how is the flow in this JSP

I was trying to understand the use of <c:url> tags, I looked for a example in here.
But i did not understand the flow of execution in this page at all
Could you please explain it?

body>
	<form method="POST">
		<center>
		<table border="1" >
			<tr>
				<td width="50%">Enter URL:</td>
	 
				<td width="50%">
				<input type="text" name="url" value="http://www.roseindia.net"/>
				</td>
			</tr>

<tr>
				<td width="50%">Enter your name</td>

<tr>
				<td width="50%">Enter the password</td>

<tr>
				<td width="50%">Enter your email address</td>

<c:if test="${pageContext.request.method=='POST'}">
		<hr>
		<c:url value="${param.url}" var="url">
			<c:param name="name" value="${param.name}"/>
			<c:param name="pwd" value="${param.pwd}"/>
			<c:param name="email" value="${param.email}"/>
		</c:url>

<br/><b>The resulting URL is:</b>
		<c:out value="${url}"/>
	</c:if>
	<hr>
</body>
</html>

Do you really not indent your code? If you do, why are you posting unindented code that's hard to read?

In any case, in the following:
The <c:url> action creates the properly formed and encoded URL and stores it in a scoped variable named url.

Afterwards, the EL expression ${url} causes it to be emitted into the generated HTML.

Sorry for the unindented code. I indented it now.
But when the page is first loaded, only the table is created, and ON clicking the submit button the c:url thing is happening. I mean why is the curl thing not happening when the page is loaded(It would have printed null anyhow)?? what is THE condition that is stopping the execution of the c:url until the submit button is clicked.

May be this question is simple and stupid. I think this is because i don't have an prior experience in development

The first time the page is accessed it would be through a GET, not a POST, so the whole code block isn't executed.

But when is the page loaded for the second time

I mean to ask when and how??

That happens when the form is submitted - since the form tag has no action attribute, it submits to itself.

Ulf Dittmer wrote:The first time the page is accessed it would be through a GET, not a POST

Ulf Dittmer wrote:since the form tag has no action attribute, it submits to itself.

What i understood from these statements is that when a from without action attribute is first loaded , it is GET. And when it is submitted it would return the same page with a POST request. (Correct me if i am wrong. i have a feeling that this is wrong.)
With the above assumption i tried this code in a JSP.

EVEN after submission the method returned is GET

What i understood from these statements is that when a from without action attribute is first loaded , it is GET.

It has nothing to do with whether or not a form in a JSP page has an action attribute. Any URL entered in a browser is accessed via GET.

With the above assumption i tried this code in a JSP.
<%= request.getMethod() %><br> <form > <input type="text" name="First"> <input type="submit"> </form>
EVEN after submission the method returned is GET

You can't just randomly omit attributes and expect things to work still. If you want a POST, then you need a method attribute that says so. In the absence of a method attribute, the default method is GET.

Ulf Dittmer wrote:The first time the page is accessed it would be through a GET, not a POST, so the whole code block isn't executed.

Then how is the request becomes post when the form is submitted ??

That's what the method attribute is for that I mentioned.

By the way, that smiley you're using doesn't mean what you think it means: http://faq.javaranch.com/java/SaloonGraemlins

Ulf Dittmer wrote:
By the way, that smiley you're using doesn't mean what you think it means: http://faq.javaranch.com/java/SaloonGraemlins

Oh... sorry i did not me that expression
i meant

Soory to say that, I still did not understand how the request becomes POST

That's what the method attribute is for that I mentioned.