asked on

How do I get variables to be available outside of <% %>?

Hello,
Im new to JSP trying to figure some things out. How do I get variables that I set in code blocks <% %>, to be usable on a regular page? See my example below: I set the campaignid,listid,and userid values based on the querystring... it outputs fine in the block, but the variables arent avaialbe to the rest of the page?


<%
String[] work = request.getQueryString().split("_");
if (work.length == 3)
{
String campaignid = work[0];
String listid = work[1];
String userid = work[2];
out.println(campaignid + " | " + listid + " | " + userid);
}
%>

CampaignID: ${campaignid} 
ListID: ${listid} 
UserID: ${userid} 

Thanks,
Rick

hongjun

try declaring it outside the brackets {.. }


<%
String[] work = request.getQueryString().split("_");
String campaignid = "", listid = "", userid = "";
if (work.length == 3)
{
campaignid = work[0];
listid = work[1];
userid = work[2];
out.println(campaignid + " | " + listid + " | " + userid);
}
%>

Mick Barry

String[] work = request.getQueryString().split("_");
String campaignid = "";
String listid = "";
String userid = "";
if (work.length == 3)
{
campaignid = work[0];
listid = work[1];
userid = work[2];
out.println(campaignid + " | " + listid + " | " + userid);
}

richardsimnett

ASKER

Tried both out guys. Neither worked... still dont get any output from the ${campaignid} tokens outside of the <% %>.

Thanks,
Rick

ASKER CERTIFIED SOLUTION

Mick Barry

membership

This solution is only available to members.

To access this solution, you must be a member of Experts Exchange.

Start Free Trial

hongjun

And also are you sure work.length is == 3?
If not, then the value will be blank and you won't see anything.

hongjun

richardsimnett

ASKER

Here is what I am getting...

The Code:

<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/sql" prefix="sql" %>


<%
String campaignid = "";
String listid = "";
String userid ="";
String[] work = request.getQueryString().split("_");
if (work.length == 3)
{
campaignid = work[0];
listid = work[1];
userid = work[2];
out.println(campaignid + " | " + listid + " | " + userid + " ");
}
%>

CampaignID: <%= campaignid %> 
CampaignID: ${campaignid} 

The output:

1 | 1 | 1000
CampaignID: 1
CampaignID:

Why does this work for the first <%= %> but not for ${campaignid}? it makes no sense.

Thanks,
Rick

Mick Barry

means EL isn't working

richardsimnett

ASKER

objects,
any suggestions on how to get that to work.... it works in other places.. I have ${2+2} to test it out and that works....

Thanks,
Rick

Mick Barry

Actually I take that back, think its a scope issue instead.
el cannot see local vars, only session/request vars. If you really want to use el, then try adding values to request scope.

How do I get variables to be available outside of &lt;% %&gt;?

How do I get variables to be available outside of <% %>?