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JSP Initialization Parameters

 
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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")%><br>

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

pls...help...
 
Reema Patel
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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>
 
Greenhorn
Posts: 23
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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>
<P>Place content here.</P>




This is a local Parameter: <%= config.getInitParameter("email") %> <br />
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 ]
 
Ranch Hand
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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
 
Tina Jain
Greenhorn
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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
 
Sheriff
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173
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If a deployment descriptor parameter is to be generally accessible from various parts of a web app, it should be a conext parameter.
 
Greenhorn
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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
 
Bear Bibeault
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Is this legacy code? If not, there should be no Java code in your JSP. You should be accessing such data using the EL.
 
Ranch Hand
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Eclipse IDE Java
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You can use EL in your JSP
 
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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!
 
Hebert Coelho
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Abimaran Kugathasan wrote:if we want to access the JSp initialization parameters through EL, then, How?

Thanks!



Can you show the code?
 
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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.
 
Don't get me started about those stupid light bulbs.
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