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 <[EMAIL PROTECTED]> 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 <[EMAIL PROTECTED]>:
>
> > 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 <[EMAIL PROTECTED]> 的正文：
> > > <c:catch var="exc">
> > > ...
> > > </c:catch>
> > > <c:if test="${exc != null}">
> > > <c:out value="${exc.message}"/>
> > > </c:if>
> > >
> > > Quoting Gao Di <[EMAIL PROTECTED]>:
> > >
> > > > 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!?
> > > > 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:[EMAIL PROTECTED]>
> > > D.O.Tech <http://www.dotech.com/>
> > >
> > >
> >
>
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> > > [EMAIL PROTECTED]
> > >
> > >
> >
> >
>
_________________________________________________________
> > 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:[EMAIL PROTECTED]>
> 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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