EL

[sangeeta kapoor]

There is a person bean with name property. So in my JSP to get the name using EL

${requestScope.person["name"]}

How can I get the same result without using the dot operator and only using the [] operator.

I am doing something like this but this doesn't work
${requestScope[person["name"]]}

[Durgaprasad Guduguntla]

Well, this is a tricky and good question.

requestScope - a java.util.Map that maps request-scoped attribute names to their values.

If you want to use [] operator on the requestScope Map, the value evaluated for the expression used within the [] should be available as "key" for any object stored in the request scope. For example, look at the following JSP:

  
<%@ page import="foo.scwcd.Person" %>
<%@ page import="java.util.ArrayList" %>
<%
ArrayList list = new ArrayList();
list.add("EL");
list.add("Example");
Person p = new Person();
p.setName("Sangeetha");
request.setAttribute("person", p);
request.setAttribute("Sangeetha", list);
%>
 
The Persons name is: ${requestScope.person["name"]}<br>
The value of object containing person as Key: ${requestScope[person["name"]]} 

The output is:

  
The Persons name is: Sangeetha
The value of object containing person as Key: [EL, Example] 

Here person["name"] is evaluated to "Sangeetha" which in turn is the key for object "list" stored in the requestScope Map.

Thanks,

Durga

[P. Dunn]

I am doing something like this but this doesn't work
${requestScope[person["name"]]}

To put it another way,

person["name"] 

evaluates to a Person object, not the string "person." The object must be turned into a map key for requestScope. The object is not evaluating to the string you expect.
[ February 23, 2005: Message edited by: P. Dunn ]