Hao Ding wrote:
> Hi,
>
> I have not got an idea to solve the problem below. Can anybody give me a hand?
>
> Regards,
> Hao
>
>
>>===== Original Message From Tag Libraries Users List
>
> <[EMAIL PROTECTED]> =====
> I have a JSP page that initially uses scriptlets, now I am going to transfer
> it using JSTL tags
>
> The initial code is
>
> <%@ page import="mm.*" %>
> <jsp:useBean id="cate" scope="session" class="mm.CateBean" />
> <jsp:useBean id="report" scope="page" class="mm.ReportBean" />
>
> <%
> int idx = report.getId();
> mm.LData ld = cate.getLData(idx);
> %>
>
> How to translate the Java code into EL using JSTL core library?
>
> Any help will be very much appreciated.
The first part is easy: The "${report.id}" EL expression corresponds
to the "report.getId()" Java code. But there's no support for calling
methods with arguments in the EL, so you need to change things a
bit to do it all with JSTL and the EL. One way is to change the
CateBean so that it has a getter method that returns an array of
all data instead of (or in addition to) the method that returns
one item given a key, i.e. add this method:
public LData[] getLData() {...}
You can then replace all of the above with this:
<jsp:useBean id="cate" scope="session" class="mm.CateBean" />
<jsp:useBean id="report" scope="page" class="mm.ReportBean" />
<c:set var="ld" value="${cate[report.id]}" />
The "ld" variable is then available in other EL expressions, and
as a page scope attribute to custom actions etc.
Hans
--
Hans Bergsten [EMAIL PROTECTED]
Gefion Software http://www.gefionsoftware.com
JavaServer Pages http://TheJSPBook.com
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