ui development using jstl+jsp+javascript using spring framework.

[Cbani]

hi guys,

i m stuck in a ui development using jstl+jsp+javascript using spring framework.

need solution very urgently...plz help.

i have a jsp page where i have two select box..
i have a hashmap<string, hashset> which comes from the server side.

my requirement is to populate the first select box with the keys of the hashmap and the second as the values(hashset) of the corresponding key.

i am able to display the first one;

now, the second select box should get populated with the hashset of the particular key from the map.


the second one should get populated once the user selects any of the options from the first select box; and onChange should display the corresponding values of the map that is a set.


here is my code

<td align="left"><strong>Environment Component Name:</strong></td>
<td align="left">
<form:select path="envCompName" id="envCompName" [B]onchange="<c:set var="set" value="${map.value}" /> "[/B]>
<form:option value="-" label="--Please Select Env Component--" />
<c:forEach items="${superPackage.superPackageMap}" var="map" >
<form:option value="${map.key}" label="${map.key}" id="envCompNameOpt"/>
<form:hidden path="house" id="hiddenSet" value="${map.value}" />
</c:forEach>
</form:select>
</td>
<td align="right"><strong>Environment Name:</strong></td>
<td align="right"><form:select path="envName" id="envName" >
<form:option value="-" label="--Please Select Environment--" />
<c:forEach items="${set}" var="mySet" >
<form:option value="${mySet}" label="${mySet}" id="envCompNameOpt"/>
</c:forEach>
</form:select></td>

the code you see in bold gives me a syntax error.please suggest how can i solve that..any code will be helpful..i have tried calling a javascript function onChange of first one...but no luck :(

[Eranga]

Cbani, please don't post unrelated questions in others threads. Start a new thread next time on the correct sub-forum. This time only I'll move this to the correct place.

[Cbani]

hey sorry Eranga..i was searching for a related thread but when dint get; added here..next time i ll take care of the same... but please provide some solutions

[Cbani]

any idea guys?

[Cbani]

hi guys,

now i have modified my code to remove the syntax errors.

                                                  <tr>
													<td align="left"><strong>Environment Component Name:</strong></td>
													<td align="left">
													<c:set var="map" value=""/>
														<form:select path="envCompName" id="envCompName" onchange='" <c:set var='valueSet' value='${map.value}'/> "' >
															<form:option value="-" label="--Please Select Env Component--" />
															<c:forEach items="${superPackage.superPackageMap}" var="map" >
																<form:option value="${map.key}" label="${map.key}" id="envCompNameOpt"/>														
															</c:forEach>
														</form:select>
													</td>
													<td align="right"><strong>Environment Name:</strong></td>
													<td align="right"><form:select path="envName" id="envName" >
														<form:option value="-" label="--Please Select Environment--" />
															<c:forEach items="${valueSet}" var="set" >
																	<form:option value="${set}" label="${set}" id="envCompNameOpt"/>
															</c:forEach>
														</form:select></td>
													<td style="padding: 4px 18px 5px; white-space: nowrap;"
														width="10%"><input type="button" value="Deploy"
														class="darkBlueButton" onclick="" /></td>
												</tr>

but my jsp is throwing exception at run time. pls suggest

This attribute is not recognized. <form:select path="envCompName" id="envCompName" onchange='" <c:set var='valueSet' value='${map.value}'/> "' >


This attribute is not recognized. <form:select path="envCompName" id="envCompName" onchange='" <c:set var='valueSet' value='${map.value}'/> "' >

the one you see in bold is where its pointing out
i m really stuck up....pls help

[Eranga]

Did you get the same error or a different one, can you post it here?

[Cbani]

This attribute is not recognized. <form:select path="envCompName" id="envCompName" onchange='" <c:set var='valueSet' value='${map.value}'/> "' >


This attribute is not recognized. <form:select path="envCompName" id="envCompName" onchange='" <c:set var='valueSet' value='${map.value}'/> "' >


This is what i am getting in my jsp...


i found a bad workaround(not suggestable); writing java code inside my jsp.
by this workaround i am able to achieve the functionality i was looking for.

can you suggest any solution wherein there is no java code in jsp. i.e. by using only jsp jstl and javascript?

[Eranga]

How did you define the attribute c ?

[Cbani]

thats a tablib uri prefix for jstl; the problem is not there.
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>

the problem is in the below code where i try to embed a jstl tag inside a select tag
<form:select path="envCompName" id="envCompName" onchange='" <c:set var='valueSet' value='${map.value}'/> "' >


this form is a spring form tag as u see below
<%@ taglib uri="http://www.springframework.org/tags/form" prefix="form"%>

[Eranga]

No, why I ask that is sometime this cause the class-path.

[Eranga]

Try to set a dummy value and check what's really happen. I'm not sure that your form recognized that onchange.