• Post Reply Bookmark Topic Watch Topic
  • New Topic
programming forums Java Mobile Certification Databases Caching Books Engineering Micro Controllers OS Languages Paradigms IDEs Build Tools Frameworks Application Servers Open Source This Site Careers Other Pie Elite all forums
this forum made possible by our volunteer staff, including ...
Marshals:
  • Campbell Ritchie
  • Jeanne Boyarsky
  • Ron McLeod
  • Paul Clapham
  • Liutauras Vilda
Sheriffs:
  • paul wheaton
  • Rob Spoor
  • Devaka Cooray
Saloon Keepers:
  • Stephan van Hulst
  • Tim Holloway
  • Carey Brown
  • Frits Walraven
  • Tim Moores
Bartenders:
  • Mikalai Zaikin

Problem about EL ....

 
Greenhorn
Posts: 17
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Hi everyone,

i have a problem in studying El...

when i create a Map in <% %> area:
<%
SortedMap map = new SortedMap;
map.put("key", "value");
%>
and want to display the data by using EL
${map.key}

but it show me nothing....
what is the reason?
it can show me ${header["user-agent"]}
that mean the page can run El at my tomcat..

also, do EL only for display the date?
(for replace the <%= XX %> tag)
how do i create instance by using EL?

i always get confuse with the format ${aaa.bbb.ccc}

thanks
 
Ranch Hand
Posts: 118
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
The map created in the scriptlet was never stored in one of the JSP scopes.

<%
Map map = new HashMap();
map.put("key", "value");
pageContext.setAttribute("map", map);
%>

<c ut value='${map["key"]}'/>
 
With a little knowledge, a cast iron skillet is non-stick and lasts a lifetime.
reply
    Bookmark Topic Watch Topic
  • New Topic