struts - accessing beans from JSP

[bowkerSF]

hello. in one of my jsps, i have something like <logic:notEmpty
name="myData">...</logic:notEmpty>. however, i'm not sure where
myData is coming from because there's no <jsp:useBean> tag anywhere in
the jsp. aside from just searching all the .java files for "myData,"
how do you determine where it's coming from?

and, i'm pretty sure you can't just access any ol' variable in that
<logic:notEmpty> tag. so, how do you know which ones are valid to
access and which ones aren't?

thanks

 

[jlc488]

hello.  in one of my jsps, i have something like <logic:notEmpty
name="myData">...</logic:notEmpty>.  however, i'm not sure where
myData is coming from because there's no <jsp:useBean> tag anywhere in
the jsp.  aside from just searching all the .java files for "myData,"
how do you determine where it's coming from?

and, i'm pretty sure you can't just access any ol' variable in that
<logic:notEmpty> tag.  so, how do you know which ones are valid to
access and which ones aren't?

thanks

i think it is called custom tag library...and..they usually sets in
request attribute..

 

[Arne Vajhøj]

hello. in one of my jsps, i have something like <logic:notEmpty
name="myData">...</logic:notEmpty>. however, i'm not sure where
myData is coming from because there's no <jsp:useBean> tag anywhere in
the jsp. aside from just searching all the .java files for "myData,"
how do you determine where it's coming from?

and, i'm pretty sure you can't just access any ol' variable in that
<logic:notEmpty> tag. so, how do you know which ones are valid to
access and which ones aren't?

It searches i page, request, session and application
scope.

But request scope is the most used (set by something like
Struts action).

Arne