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Getting values from the map using jstl
Hi all,
Below is the code that I am working. I have a list as a key and a string and integer as values. The problem I am having is displaying the values of the map.
This is the output I getJava Code:<%@ page language="java" contentType="text/html" %> <%@ page import="java.util.*" %> <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> <% // Create an ArrayList with test data List list = new ArrayList(); String[] arr={"name1","name2"}; list.add(arr); Map author1 = new HashMap(); author1.put(list, "A"); author1.put(list, new Integer(1)); //author1.put("list",list); pageContext.setAttribute("authors", author1); %> <html> <head> <title>Search result: Authors</title> </head> <body bgcolor="white"> <table> <TH>Name</th> <TH>Id</th> <TH>List</TH> <tr> <c:forEach var="entry" items="${authors}"> <c:forEach var="value" items="${entry.key}"> <c:forEach var="hvalue" items="${value}"> <TR> <TD>${entry.value}</TD> <c:if test="${!empty value}"> <TD>${hvalue}<br></TD> </c:if> </TR> </c:forEach> </c:forEach> </c:forEach> </tr> </table> </body> </html>
The output that I am expecting isJava Code:Name Id List 1 name1 1 name2
I am desperately in need of help. Can someone help me pleaseJava Code:Name Id List A 1 name1 A 1 name2
Thanks in Advance
- 07-28-2010, 09:34 AM #2
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A List as a key?
That really doesn't sound right...
Anyway, yoiu are using the same list object as your key for both things you are adding isn, resulting in the 'A' being overwritten by the '1'. So the only thing that you list is mapped to is the Integer '1', which is why you see the output you see.
Now, because I can't think of any reason to use a List as a key (key's are usually ids or Strings or enums, occasionally beans) I suspect your concept is wrong. What is it you're trying to do?
- 07-28-2010, 05:58 PM #3
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Thanks to Tolls for the reply. Thanks for pointing out, yes it was overridding. Anyway I solved the problem.
- 12-06-2011, 08:06 AM #4
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Re: Getting values from the map using jstl
hiiii Ms.Ranjan
i am facing the same problem....
so please tell me how this problem get resolve....
Thanks in advance..
- 12-06-2011, 09:44 AM #5
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Re: Getting values from the map using jstl
Maybe if you post your code and problem we might be able to solve it, but if it's the exact same problem then I explain what the trouble is in my post (including a lot of typos, it seems).
- 12-06-2011, 12:01 PM #6
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Re: Getting values from the map using jstl
thanks it get resolved.
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