Chris Tucker wrote:
>
> Hi all,
>
> I was wondering how other people approach the problem of passing parameters
> to include files (or even if this is really something that it's a good idea
> to do...). For example, say I want to specify some button text for an
> included file, I may want pass a parameter called "buttontext" with the
> value "Hello". The way I've been approaching this so far is to encode the
> parameters as a query string on the include URL, e.g.
> <jsp:include page="test.jsp?buttontext=Hello" />
> but this doesn't really scale up to anything more than simple textual
> arguments. I could add stuff to the session or context, allowing me to use
> more complex objects, but I don't want to be creating a load of
> interdependencies as far as attribute naming etc. is concerned between an
> include file and the file including it. Ideally, I'd like to just be able
> to parameterise the include as one would a method.
>
> Any suggestions?
For text parameters, you can use nested param elements instead of the
query string:
<jsp:include page="test.jsp">
<jsp:param name="buttontext" value="Hello" />
</jsp:include>
This saves you from having to convert special characters in the parameter
value (URL encoding).
For complex data structures, you can use request attributes:
<jsp:useBean id="foo" class="com.foo.MyComplexData"
scope="request">
<jsp:setProperty name="foo" property="bar" value="<%= new Date() %>" />
...
</jsp:useBean>
<jsp:include page="test.jsp">
The included page is processing the same request, so it has access to all
request scope data.
Hans
--
Hans Bergsten [EMAIL PROTECTED]
Gefion Software http://www.gefionsoftware.com
Author of JavaServer Pages (O'Reilly), http://TheJSPBook.com
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