Declaring a variable in one JSP file and accessing it in another JSP file

10-09-2006

I am new to JSPs and am actually a core java programmer. I have a
problem. I have different jsp files and all these jsp files should be
including a header.jsp. I want to display different title in this
header.jsp for each of the above files, I mentioned. The way I thought
was that I'll have a variable called pageTitle in all the above jsp
files and access this variable in header.jsp. But I am not successful
uptil now.

10-09-2006

Hi,

Looks like JSP tag files might be your best bet. They are kind of like
include, but can handle attributes. If all you have to do is change the
title, it can be passed as an attribute to the tag file. If you want to
add more customization, you might have to consider using tag handlers -
they can contain complex java code.

http://today.java.net/pub/a/today/20.../tagfiles.html

http://java.sun.com/j2ee/1.4/docs/tu.../JSPTags5.html

-cheers,
Manish

10-09-2006

wrote:
> I am new to JSPs and am actually a core java programmer. I have a
> problem. I have different jsp files and all these jsp files should be
> including a header.jsp. I want to display different title in this
> header.jsp for each of the above files, I mentioned. The way I thought
> was that I'll have a variable called pageTitle in all the above jsp
> files and access this variable in header.jsp. But I am not successful
> uptil now.

page.jsp

<%
String pagename = "example page";
%>
<%@ include file="hdr.jsp" %>
Bla bla bla

hdr.jsp

I am <%=pagename%>.
<hr>

works here.

I do not believe that you can do it with the jsp:include
tag.

And in general I think you are on the wrong track - this is
not the JSP way of doing things.

Arne

10-09-2006

wrote:
> I am new to JSPs and am actually a core java programmer. I have a
> problem. I have different jsp files and all these jsp files should be
> including a header.jsp. I want to display different title in this
> header.jsp for each of the above files, I mentioned. The way I thought
> was that I'll have a variable called pageTitle in all the above jsp
> files and access this variable in header.jsp. But I am not successful
> uptil now.
>

myjsp.jsp:

<html>
<%
String title = "A Title";
%>
<%@ include file = "includes/header.jsp" %>

Rest of the page here

</html>

Reference <%=title%> in your header.jsp. You can set title to a
different value in each page that includes the header.

10-10-2006

You could check out something like Struts tiles as well,
http://struts.apache.org/1.x/struts-tiles/index.html (not tied to Struts
btw).

-Kristian

wrote:
> I am new to JSPs and am actually a core java programmer. I have a
> problem. I have different jsp files and all these jsp files should be
> including a header.jsp. I want to display different title in this
> header.jsp for each of the above files, I mentioned. The way I thought
> was that I'll have a variable called pageTitle in all the above jsp
> files and access this variable in header.jsp. But I am not successful
> uptil now.
>

10-10-2006

Thanks to all who replied. This was of great help and got many other
pointers too through your replies. Thanks a ton.

Also Arne,

Can you please elaborate on what you exactly mean by "you are on the
wrong track - this is
not the JSP way of doing things". This might help me to have a
different point of view.

-Anubha

Arne Vajhøj wrote:
> page.jsp
>
> <%
> String pagename = "example page";
> %>
> <%@ include file="hdr.jsp" %>
> Bla bla bla
>
> hdr.jsp
>
> I am <%=pagename%>.
> <hr>
>
> works here.
>
> I do not believe that you can do it with the jsp:include
> tag.
>
> And in general I think you are on the wrong track - this is
> not the JSP way of doing things.
>
> Arne

10-10-2006

wrote:
> Can you please elaborate on what you exactly mean by "you are on the
> wrong track - this is
> not the JSP way of doing things". This might help me to have a
> different point of view.

You should be looking at:
- having requests going to a controller servlet
that sets various info in request and forward
to a JSP page
- having no embedded Java code in the JSP code
and only using taglibs
etc.etc.

Arne

10-11-2006

Another way to do it is with jsp:include

In parent.jsp, do this:

<jsp:include file='header.jsp>
<jsp

aram name="title" value="some text"/>
</jsp:include>

In header.jsp, do this:

Title is ${param.title}.

-cheers,
Manish

10-11-2006

> <jsp:include file='header.jsp>

sorry - please read <jsp:include page="header.jsp">

-cheers,
Manish

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