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What's Going Wrong Here?

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posted 15 years ago

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HI Everyone,

I ahve written a servlet code. But somehow I am running into problems! The basic flow is from a JSP --> Servlet --> JSP. But somehow my context path has gone wrong somewhere.

My form tag consists of this:

My web.xml:
[/code]

But somehow the context name which turns up is:

Could you please tell me where i am going wrong??

Vijitha Kumara

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posted 15 years ago

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How is your application deployed (directory structure) ? Are you able to access any other resource(s) in the application & how you access (i.e. URL) the resource ?

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Nishan Patel

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posted 15 years ago

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Hi,

Can you please make some small change from

to

and check..

Thanks, Nishan Patel
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Nishan Patel

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posted 15 years ago

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Hi,

Use [code] tag when you question at java ranch with code...

please read this ............ Use Code Tag

Thanks, Nishan Patel
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Somnath Mallick

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posted 15 years ago

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^^ That didn't work!

I have attached my directory structure please check it out.

I did use code tag! Somehow got removed when i was editing my post!

DirectoryStructure.jpeg

Seetharaman Venkatasamy

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posted 15 years ago

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Somnath Mallick wrote:
<form action="EnvDetailsServlet" method="post">

and your url-pattern of servlet-mapping is

is this helps you ? got the problem ?

Nishan Patel

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posted 15 years ago

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Hi,

It's my mistake change

to

from the <url-pattern> your servlet selected .... so just change this and check for problem ...

Thanks, Nishan Patel
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Somnath Mallick

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posted 15 years ago

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I tried with :

Both of them didn't work!

Nishan Patel

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Hi,

After make changes to <form action="/iVVTPortal2/EnvDetailsServlet" method="post">

still show the message,

HTTP Status 404 - /iVVTPortal2/jsp/EnvDetailsServlet
type Status report

message /iVVTPortal2/jsp/EnvDetailsServlet

description The requested resource (/iVVTPortal2/jsp/EnvDetailsServlet) is not available.
Apache Tomcat/6.0.20

Can you please post your code from where you dispatch to your jsp page using JSP --> Servlet --> JSP

If you are using Servlet then your code looks like this into servlet,

Thanks, Nishan Patel
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Somnath Mallick

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posted 15 years ago

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Atleast that extra "jsp" has gone away from the context path. Now i get the error:

My JSP Page is:

<%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
	<head>
		<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
		<title>Environment Display Details</title>
	</head>
	<body style="BACKGROUND-COLOR: #c0c0c0; height : 359px;">
		<form action="/iVVTPortal2/EnvDetailsServlet" method="post">
			<h1 style="FONT-FAMILY: 'Raavi';"><i><B FONT-FAMILY: 'Lucida Calligraphy'>Retrieve Environment Details:</B></i></h1>
			<br>
			<br>
			<br>
			<table  border="2"   >
 				<tr>
 					<td  >Environment:</td>
 					<td ><input type="text" name="environment"></td>
 				</tr>
 				<tr>
 					<td  >CP Name:</td>
 					<td ><input TYPE="text" name="cpName"></td>
 				</tr>
 				<tr>
 					<td ><input type="submit" value="Submit"></td>
 					<td ><input type="reset" value="Reset"></td>
 				</tr>
 			</table>
		</form>
	</body>
</html>

This sends the request from JSP-->Servlet. This is in the jsp folder of the WebContent.

Nishan Patel

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posted 15 years ago

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Hi,

/jsp/yourJsp .jsp this path depending upon your application structure. It you put your jsp file at context level then it simply required /yourjsp.jsp...
I just give you simple example...

Thanks, Nishan Patel
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Ankit Garg

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posted 15 years ago

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Somnath please Use A Meaningful Subject Line when you start a topic.

Did you change the URL patter

to

in your deployment descriptor?? Also in your JSP you don't need to hard code the context path. You can use ${pageContext.request.contextPath} like

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Somnath Mallick

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posted 15 years ago

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Thanks Ankit, your suggestion worked. Could you please explain me what this statement does: pageContext.request.contextPath? Also one of my friends told me to use:

Its also working! Could you please tell me how?

Nishan Patel

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posted 15 years ago

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pageContext is of type javax.servlet.jsp.PageContext.

pageContext class is an abstract class.

It do following things

provide convenience methods to get and set attributes in diff scopes.

provide convenience methods for transferring requests to other resources in the web application

store the references to implicit objects

when you write pageContext.request.contextPath will give you request object and get path to your project like localhost:8080/Test

so

form action="${pageContext.request.contextPath}/EnvDetailsServlet" method="post">

this will make post on action localhost:8080/Test/EnvDetailsServlet

Thanks, Nishan Patel
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Ankit Garg

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posted 15 years ago

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Somnath, Nishan explained everything nicely. As far as using ../ is concerned, it worked fine in this case. But its not necessary that it will work in all the cases. Using ../ is a relative path. So if your jsp is accessed using the URL

then ../EnvDetailsServlet will point to

But if your jsp is accessed using the URL then ../EnvDetailsServlet will point to
This might be problematic. So using the complete path from the context path is the best choice...

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Somnath Mallick

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Thanks all for your replies! It was of great help!!

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