scriptless webpage
Hello everyone,
I seek advice on implementing scriptless code into a web page for a vocabulary project. I nearly have a scriptless web page except I don't know the best way to to go about this one. I tried to use
<%=sa[${incr.count}%2]%>
but gives me the error: ']' expected.
here is the snippet I am having trouble with:
<table width="540" border="1" align="center">
<tr>
<th>
<div align="center"><b>word</b></div></th>
<th>
<div align="center"><b>meaning</b></div>
</th>
<th>
</th>
</tr>
<%
int incr=-1;
%>
<c:forEach var="vocab" items="${list}" varStatus="incr">
<%
String[] sa={"tdwhite","tdgrey"};
incr++;
%>
<tr>
<td class="<%=sa[${incr.count}%2]%>">
<div align="center"><a href="action.jsp?action=edit&id=${vocab.id}">${vocab.name}</a></div></td>
<td class="<%=sa[incr%2]%>">${vocab.description}</td>
<td class="<%=sa[incr%2]%>">
<div align="center" class="style1">look it up on <a href="http://dictionary.reference.com/browse/${vocab.name}">dictionary.com</a></div></td>
</tr>
</c:forEach>
</table>
Any advice is greatly appreciated. Thanks!
--Gregory
[2221 byte] By [
Greg439a] at [2007-11-26 14:59:00]
# 2
JSTL and EL works best with JavaBeans, and the idea is to move as much work from the JSP page as possible. To this end, I would consider creating a JavaBean that works as a 'constants' type of data store. In this little sample the bean would need just a few methods.
package luke.steve.datastore;
public class ConstantsBean {
private static final String tableCellClassNamesEven = "tdwhite";
private static final String tableCellClassNamesOdd = "tdgray";
public String getVocabTableCellClassNameEven() {
return tableCellClassNamesEven;
}
public String getVocabTableCellClassNameOdd() {
return tableCellClassNamesOdd;
}
}
Of course, you could fill it with other values that could be usefull as well. On the JSP page, you would have:
<!-- /* First, import the JavaBean above */ -->
<jsp:useBean id="constants" class="luke.steve.datastore.ConstantsBean" scope="page" />
<!-- /* Then include the code and loop */ -->
<table width="540" border="1" align="center">
<tr>
<th><div align="center"><b>word</b></div></th>
<th><div align="center"><b>meaning</b></div></th>
<th></th>
</tr>
<c:forEach var="vocab" items="${list}" varStatus="incr">
<c:choose>
<!-- /* If at an even increment, get the even class name */ -->
<c:when test="${(incr.count mod 2) eq 0}">
<c:set var="${className}" value="${constants.vocabTableCellClassNameEven}" />
</c:when>
<!-- /* Otherwise get the odd one */ -->
<c:otherwise>
<c:set var="${className}" value="${constants.vocabTableCellClassNameOdd}" />
</c:otherwise>
</c:choose>
<tr>
<td class="${className}">
<div align="center"><a href="action.jsp?action=edit&id=${vocab.id}">${vocab.name}</a></div>
</td>
<td class="${className}">${vocab.description}</td>
<td class="${className}">
<div align="center" class="style1">look it up on <a href="http://dictionary.reference.com/browse/${vocab.name}">dictionary.com</a></div>
</td>
</tr>
</c:forEach>
</table>
Message was edited by:
stevejluke
Those smarter than me will probably do a better job - maybe with a resource bundle.
# 3
Hi,
You got a couple of problems
first: int incr=-1 and varStatus="incr"> are two different variables
if you like to work with int incr you need to do something like
<td class="<%=sa[incr%2]%>">
<% incr++;%> and you can display in jsp expression <%= XXXX %>
but if you like to use varStatus="incr" you need to use <c:out value="${incr.count%2}"/>
remember int XXXX and varStatus="XXXX" a totally different variables.
