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From Gao Di <jaoy...@yahoo.com.cn>
Subject Re: how to catch my own exception in jstl
Date Mon, 23 Aug 2004 02:49:05 GMT
cause the DeviceHelper is on the top layer,it can't
catch the IOException,then i throw a custom exception
(DaoException) in it.in the place which really
generates IOException,i put the message in my custome
exception:
catch (IOException e) {
throw new DaoException("server down");}

so i think,can i use jstl to catch the DaoException in
the DeviceHelper and get the "server down" string.
in fact the problem is,can the <c:catch> tag catch the
exactly exception,if no,i can only use jsp script.

 --- Kris Schneider <kris@dotech.com> 的正文:
> You're right, I skimmed your post too quickly. Can
> you provide a more complete
> stack trace? So, does DeviceHelper.getDevices()
> catch IOException and throw
> DaoException?
> 
> Quoting Gao Di <jaoyina@yahoo.com.cn>:
> 
> > it seems u don't know what i mean,i know the
> useage u
> > wrote,but it only displays the el exception
> message.
> > 
> >  --- Kris Schneider <kris@dotech.com> 的正文:
> > > <c:catch var="exc">
> > >   ...
> > > </c:catch>
> > > <c:if test="${exc != null}">
> > >   <c:out value="${exc.message}"/>
> > > </c:if>
> > > 
> > > Quoting Gao Di <jaoyina@yahoo.com.cn>:
> > > 
> > > > i know the <c:catch> can catch the exception
> on
> > > > jsp,but the error message which i got from it
> > > looked
> > > > like below:
> > > > javax.servlet.jsp.el.ELException: An error
> > > occurred
> > > > while getting property "deivces" from an
> instance
> > > of
> > > > class com.service.transfer.client.DeviceHelper
> 
> > > > 
> > > > in fact this error was generated by an
> IOException
> > > in
> > > > the deep layer,and i have written my own
> exception
> > > > class to describe the detail error reason,such
> as:
> > > > catch (IOException e) {
> > > > throw new DaoException("server down");}	
> > > > so i want to know in my jsp files can i use
> jstl
> > > to
> > > > catch the DaoException and show the "server
> down"
> > > > message on the page.yet the <c:catch> can only
> > > catch
> > > > the exception,it didn't know what the exactly
> > > > exception it is.
> > > > 
> > > >
> > >
> >
>
_________________________________________________________
> > > > Do You Yahoo!?
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> > > > http://music.yisou.com/
> > > > 美女明星应有尽有,搜遍美图、艳图和酷图
> > > > http://image.yisou.com
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> > > >
> > >
> >
>
http://cn.rd.yahoo.com/mail_cn/tag/1g/*http://cn.mail.yahoo.com/event/mail_1g/
> > > 
> > > -- 
> > > Kris Schneider <mailto:kris@dotech.com>
> > > D.O.Tech       <http://www.dotech.com/>
> > > 
> > >
> >
>
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> > > For additional commands, e-mail:
> > > taglibs-user-help@jakarta.apache.org
> > > 
> > >  
> > 
> >
>
_________________________________________________________
> > Do You Yahoo!?
> > 150万曲MP3疯狂搜,带您闯入音乐殿堂
> > http://music.yisou.com/
> > 美女明星应有尽有,搜遍美图、艳图和酷图
> > http://image.yisou.com
> > 1G就是1000兆,雅虎电邮自助扩容!
> >
>
http://cn.rd.yahoo.com/mail_cn/tag/1g/*http://cn.mail.yahoo.com/event/mail_1g/
> 
> -- 
> Kris Schneider <mailto:kris@dotech.com>
> D.O.Tech       <http://www.dotech.com/>
> 
>
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> 
>  

_________________________________________________________
Do You Yahoo!?
150万曲MP3疯狂搜,带您闯入音乐殿堂
http://music.yisou.com/
美女明星应有尽有,搜遍美图、艳图和酷图
http://image.yisou.com
1G就是1000兆,雅虎电邮自助扩容!
http://cn.rd.yahoo.com/mail_cn/tag/1g/*http://cn.mail.yahoo.com/event/mail_1g/

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