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Dought about useBean and getProperty

Narendra Dhande
Ranch Hand

Joined: Dec 04, 2004
Posts: 950
Hi,

To use the <jsp:getProperty > action, is it required to define the bean using <jsp:useBean> ?

I am asking this question, because I found that the <jsp:getProperty> work on any scoped beans. I tested the following.



Here Person is valid bean.
After running this JSP file the output is narendra.

Any clarification please.

Thanks


Narendra Dhande
SCJP 1.4,SCWCD 1.4, SCBCD 5.0, SCDJWS 5.0, SCEA 5.0
Roy Simon
Ranch Hand

Joined: Aug 26, 2005
Posts: 62
The jsp:getProperty tag is used as follows:
<jsp:getProperty name = "myName" property = "myProperty">
so it is seen that the name attribute has to be an id of some bean. Hence somewhere before the getProperty tag the useBean tag has to be there.
You can check the c:set tag to when is similar to this but only much cooler....
Hope this helps
Regards
Simon
Narendra Dhande
Ranch Hand

Joined: Dec 04, 2004
Posts: 950
Hi,


so it is seen that the name attribute has to be an id of some bean. Hence somewhere before the getProperty tag the useBean tag has to be there.


I was also thinking in the same direction. But the above posted code excuted without error. I tested it on tomcat and Sn Java Application Server 8.1. I addition to this, if I try

<jsp:useBean id="pr" class="mypackage.Person">
<jsp:setProperty name="pr" property="name" value="narendra"/>
</jsp:useBean>

<% Person p = new Person();
p.setName("SomeName");
pageContext.setAttribute("pr", p);
%>

The in the same program, I use the following

<jsp:getProperty name="pr" property="name" />

It is printing "SomeName" not "narendra"

Thanks
 
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