What does your "usebean" tag look like?
-----Original Message-----
From: Tim Davidson [mailto:[EMAIL PROTECTED]
Sent: Friday, June 13, 2003 4:39 AM
To: [EMAIL PROTECTED]
Subject: Re: JSP:Setproperty and empty strings
Thanks for your answer but this doesnt work! The following lines have no affect on the
bean:
<jsp:setProperty name="myBean" property="firstName" value="<%=null%>"/>
<jsp:setProperty name="myBean" property="firstName" value="<%=""%>"/>
<jsp:setProperty name="myBean" property="firstName" value=""/>
Also:
<jsp:setProperty name="myBean" property="*" value=""/>
or
<jsp:setProperty name="myBean" property="*" value="<%=""%>"/>
causes:
org.apache.jasper.JasperException: jsp.error.setProperty.invalid
Any other ideas?
-----Original Message-----
From: Hans Bergsten [mailto:[EMAIL PROTECTED]
Sent: Thursday, June 12, 2003 5:25 PM
To: [EMAIL PROTECTED]
Subject: Re: JSP:Setproperty and empty strings
Tim Davidson wrote:
> yeah, the spec is unclear on this point. I have tried this and it doesnt have the
> desired behaviour:
> <jsp:SetProperty name="RequestParmBean" property="inputfieldA" value=""/>
> This will not set inputfieldA to an empty string.
> Does anyone know why they implemented it in this way?
I think it was for consistency with the auto-population model, i.e.,
when using property="*". But, the result is very confusing, I agree.
This should work, though, since a request-time attribute value is
used as-is:
<jsp:setProperty name="RequestParmBean" property="inputfieldA"
value='<%= "" ' />
or to set it to null:
<jsp:setProperty name="RequestParmBean" property="inputfieldA"
value='<%= null ' />
Messy ... An alternative is to use JSTL's <c:set>:
<c:set target="${RequestParmBean}" property="inputfieldA"
value="" />
Hans
> -----Original Message-----
> From: Zerbe John W [mailto:[EMAIL PROTECTED]
> Sent: Thursday, June 12, 2003 4:48 PM
> To: [EMAIL PROTECTED]
> Subject: Re: JSP:Setproperty and empty strings
>
>
> If I am reading the spec correctly, you can initialize all of your properties
> individually prior to setting them from the request params. I believe that the line
> you quoted from the spec only applies when setting properties from request params.
>
> eg:
> <jsp:SetProperty name="RequestParmBean" property="inputfieldA" value=""/>
> <jsp:SetProperty name="RequestParmBean" property="inputfieldA" param="inputfieldA"/>
>
> or, assuming an input form the "inputfieldA" and "inputfieldB":
> <jsp:SetProperty name="RequestParmBean" property="inputfieldA" value=""/>
> <jsp:SetProperty name="RequestParmBean" property="inputfieldB" value=""/>
> <jsp:SetProperty name="RequestParmBean" property="*"/>
>
>
> -----Original Message-----
> From: Tim Davidson [mailto:[EMAIL PROTECTED]
> Sent: Thursday, June 12, 2003 9:30 AM
> To: [EMAIL PROTECTED]
> Subject: JSP:Setproperty and empty strings
>
>
> Hi
>
> Using <jsp:setProperty...> is is possbible to set empty strings? and if so how?
>
> I realise the spec says:
> "If the parameter has an empty or null value, the corresponding Bean property is
> not set. "
>
> but can anyone reccommend a fix?
>
> thanks in advance.
>
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--
Hans Bergsten <[EMAIL PROTECTED]>
Gefion Software <http://www.gefionsoftware.com/>
Author of O'Reilly's "JavaServer Pages", covering JSP 1.2 and JSTL 1.0
Details at <http://TheJSPBook.com/>
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