Ed Webb wrote:
> Rick Herrick wrote:
>> Ed Webb wrote:
>>
>>> fea jabi wrote:
>>>
>>>> Thanks for your responses. I appreciate that.
>>>>
>>>> I used the JSTL to format the date. Will it work using that? Do I have
>>>> to
>>>> use decorator itself?
>>>>
>>> Use the Decorator instead
>>
>> I was actually going to suggest using JSTL for the date format. That
>> lets
>> the sort work on the date object directly (instead of the text
>> representation of the date), but doesn't require extra code. I have an
>> adversion to using decorators. Also, the JSTL date format is easily
>> localizable and easily changeable in a deployed app, whereas changes to
>> code require redeployment or hot-patching of the app.
>>
>> Why would you recommend using the decorator instead?
>>
> From what I remember from the original post, using the JSTL did not
> allow the dates to be sorted chronologically, they were being sorted
> alphabetically. If the JSTL can be used to format the date and
> DisplayTag can correctly sort the Date objects then that'd be the easier
> option. I think that's already been tried and found to not work which is
> why I suggested a Decorator. I suspect I encountered a similar problem
> when I began working with DisplayTag but it was so long ago now that
> I've forgotten.
The issue with the sorting would depend on the output of the getter. If
the getter puts out a Date object, then sorting would sort
chronologically. If the getter puts out a string containing a formatted
date, then it would sort alphabetically. Just whatever the default
comparator for the data type is.
You need to treat the tags for the date a bit differently when you're
using JSTL, however. Instead of something like:
<display:column property="myDate"/>
Instead do something like (assuming table tag declares uid="item"):
<display:column sortProperty="myDate" title="Date">
<fmt:formatDate value="${item.myDate}" pattern="MM/dd/yyyy"/>
</display:column>
You'll want to play with the pattern and maybe some other attrs on the
<fmt:formatDate> tag. There are also some neat ways to set up
localization with this in conjunction with the <fmt:setLocale> tag, but I
don't really know how to do it.
--
Rick Herrick
[EMAIL PROTECTED]
Proud member of the reality-based community
Never try to discourage thinking for you are sure to succeed.--Bertrand
Russell
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