JSTL

Can i omit .xml file??? If I don't want to use .xml files, how to solve it? bcoz according the reference book, I have no need to use the .xml file.

this is a special file called a "web.xml" file which sets parameters specific to a web application.  most servlet containers require this file.  you should definitely learn what it is and how to use it.  don't try to skip this part.  here is a good reference:

http://developer.java.sun.com/developer/Books/javaserverpages/servlets_javaserver/servlets_javaserver05.pdf

JSTL is suppose to be easy to learn.  I agree with all "tbone" has posted but there is a bare bones approach. Look at this  
http://developer.java.sun.com/developer/technicalArticles/javaserverpages/faster/    
but  it can be even simpler.  If you  downloaded    jakarta-taglibs-standard-1.0.1 , then look  at   README.txt  that came with the distribution.   Here is part of that    
"To use this distribution with your own web applications, simply copy the JAR
files in the 'lib' directory to your application's WEB-INF/lib directory.
Then, import JSTL into your pages with the following directives:

  CORE LIBRARY
    EL:  <%@ taglib prefix="c" uri="http://java.sun.com/jstl/core" %>  
     .
     .
     .  etc       "

There is no need for the newbie to fool around with .tld  or .xml   files.    Yes, your web app will run JSP without a web-xml file.   First have fun with  JSTL  then start dig deeper.

typo last  part should be      
Yes, your web app will run JSP without a web.xml file.   First have fun with  JSTL  then start to dig deeper.

Instead of  
><%@ taglib uri="http://java.sun.com/jsp/jstl/core_rt" prefix="c" %>
did you try  
<%@ taglib prefix="c" uri="http://java.sun.com/jstl/core" %>
<%@ taglib prefix="c_rt" uri="http://java.sun.com/jstl/core_rt" %>

try this,
       <c:forEach var="entry" item="${header}">
         <tr>
            <td>
              <c:out value="${entry.key}"/>
            </td>
            <td>
              <c:out value="${entry.value}"/>
            </td>
          </tr>
       </c:forEach>

where did you define   header  ?

i change <%@ taglib uri="http://java.sun.com/jsp/jstl/core_rt" prefix="c" %>  to <%@ taglib prefix="c_rt" uri="http://java.sun.com/jstl/core_rt" %> n have no error msg, but i still can't get the header information

Yah, I m using Tomcat5. I have a RequestHeaders folder under c:\Java\Tomcat5.0\webapps\, inside RequestHeaders i have a folder WEB-INF, and 2 folder under WEB-INF, which are Classes, lib n tld. I copy .jar files to lib folder and .tld files to tld folder. After this i create a a.jsp with block of codes like above, under RequestHeaders folder.

>which are Classes  
no   it is classes    
Are you able to use JSTL yet ?    

just try    
<c:out value="hello"/>  
to see if JSTL  works.

if I replace
     <c:forEach var="entry" item="${header}">
       <tr>
          <td>
            <c:out value="${entry.key}"/>
          </td>
          <td>
            <c:out value="${entry.value}"/>
          </td>
        </tr>
     </c:forEach>
with...
<c:out value="hello"/>  , it works

I asked you last week.
>where did you define   header  ?

I dun understand what do u mean tt where did i define header.

I solved the problem... anyway thanks

What was the problem ?
I was wrong  
Since you are using Tomcat 5 which uses JSP 2.0  
 you can use EL in your HTML without using <c:out>  

hello!
can u tell me please? How u have solved ur problem. I have the same problem as u had

you said
I solved the problem... anyway thanks
How? please share ur solution
thanks