JSP Initialization Parameters

Hello All,
I'm trying to set JSP initialization parameters in the web.xml file
<servlet>
<servlet-name>listener</servlet-name>
<jsp-file>/info.jsp</jsp-file>
<init-param>
<param-name>track</param-name>
<param-value>/track.jsp</param-value>
</init-param>
</servlet>

I, also tried setting the context params:
<context-param>
<param-name>track</param-name>
<param-value>/track.jsp</param-value>
</context-param>

Here is the JSP Code:
info.jsp
--------
Reading param vaue= <%= getServletConfig().getInitParameter("track")%> 

Reading context param vaue= <%= application.getInitParameter("track")%> 
The problem is that I'm getting 'null' for both, jsp params and context params....

pls...help...

I thinki go the reply....i missed out the mapping tag...without that it seems things don't work...here is the web.xml file

<servlet>
<servlet-name>listener</servlet-name>
<jsp-file>/info.jsp</jsp-file>
<init-param>
<param-name>track</param-name>
<param-value>/track.jsp</param-value>
</init-param>
</servlet>

<servlet-mapping>
<servlet-name>listener</servlet-name>
<url-pattern>/initJSP</url-pattern>
</servlet-mapping>

I am having the same problem I am trying to access the jsp init parameters from the jsp file. And its not working. If somebody know please tell.

Here is the jsp file
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<HTML>
<HEAD>
<%@ page import="java.util.*" %>
<%@ page
language="java"
contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"
%>
<META http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<META name="GENERATOR" content="IBM WebSphere Studio">
<META http-equiv="Content-Style-Type" content="text/css">
<LINK href="theme/Master.css" rel="stylesheet" type="text/css">
<TITLE>AccessGlobalAttrbutes.jsp</TITLE>
</HEAD>
<BODY>
Place content here.

This is a local Parameter: <%= config.getInitParameter("email") %> 
This is a local Parameter: <%= pageContext.getServletConfig().getInitParameter("email") %>

<%
Enumeration en = config.getInitParameterNames();
while(en.hasMoreElements()){

%>
<%= "Elements " + en.nextElement() %>

<% } %>

</BODY>
</HTML>

Here the web.xml file.

<servlet>
<servlet-name>AccessGlobalAttrbutes</servlet-name>
<display-name>AccessGlobalAttrbutes</display-name>
<jsp-file>/AccessGlobalAttrbutes.jsp</jsp-file>
<init-param>
<param-name>email</param-name>
<param-value>localtina@hotmail.com</param-value>
</init-param>
</servlet>

<servlet-mapping>
<servlet-name>AccessGlobalAttrbutes</servlet-name>
<url-pattern>/AccessGlobalAttrbutes</url-pattern>
</servlet-mapping>

in the output is is giving me

Place content here.

This is a local Parameter: null
This is a local Parameter: null

any hint will be of great help.
Have a nice day.
[ October 02, 2006: Message edited by: Tina Jain ]

Hi Tina,

Have you tried the following URL,

http://localhost:8080/test/AccessGlobalAttrbutes

i mean without a .jsp extension in your URL.

This way it works fine for me.

Regards,
Praveen

Hi Pravin,

Thanks for your reply.

If I want to access JSP initializations parameters in a jsp page that how will do it.

your reply
---

Have you tried the following URL,

http://localhost:8080/test/AccessGlobalAttrbutes

i mean without a .jsp extension in your URL.
------

What if I want to access it in the application

Have a Nice Day,
Best Regards,
Tina

If a deployment descriptor parameter is to be generally accessible from various parts of a web app, it should be a conext parameter.

I have the same problem

The web.xml is :

<servlet>
<servlet-name>TestJspPage</servlet-name>
<jsp-file>/hello.jsp</jsp-file>
</servlet>
<servlet-mapping>
<servlet-name>TestJspPage</servlet-name>
<url-pattern>/hello.do</url-pattern>
</servlet-mapping>
<context-param>
<param-name>city</param-name>
<param-value> New Delhi</param-value>
</context-param>

And I'm trying to use this parameter in my hello.jsp in this way

<%= application.getInitParameter("city") %>

When I'm accessing hello.do
it is giving me null

Can anybody help me out??

Thanks

Is this legacy code? If not, there should be no Java code in your JSP. You should be accessing such data using the EL.

You can use EL in your JSP

It's OK to get the context initialization parameter through EL, but, if we want to access the JSp initialization parameters through EL, then, How?

Thanks!

Abimaran Kugathasan wrote:if we want to access the JSp initialization parameters through EL, then, How?

Thanks!

Can you show the code?

Use EL implicit objects to access context params
Eg
However, I don't think EL has a way to access JSP initialization parameters directly. You'll have to work around it.
One workaround would be to write a tld - map the getParameterName method and then include this tld in your jsp page and use el to invoke the method.
Someone might be able to suggest a better work around though.