<form:checkbox/> BUG when 1 digit map key

[eros]

Here's the jsp code:

<c:forEach var="entry" items="${viewObj.mapObj.itemMap}"
	varStatus="status">
	<c:set var="linkId" value="${entry.key}"></c:set>
	<c:set var="item" value="${entry.value}"></c:set>
	<tr>
		<td><form:checkbox
			title="${linkId}"
			path="currentItemMap['${linkId}']" value="1"/></td>
		<td>
		${item.attrNo}</td>
	</tr>
</c:forEach>

Here's the generated html code:

<tr>
	<td>
		<input type="checkbox" value="1" title="2" name="mapObj.currentItemMap['2']" id="mapObj.currentItemMap['2']1">
		<input type="hidden" value="on" name="_mapObj.currentItemMap['2']"></td>
	<td>
		8316M0680</td>
</tr>
<tr>
	<td>
		<input type="checkbox" value="1" title="1" name="mapObj.currentItemMap['1']" id="mapObj.currentItemMap['1']1">
		<input type="hidden" value="on" name="_mapObj.currentItemMap['1']"></td>
	<td>
		8317M0770</td>
</tr>
<tr>
	<td>
		<input type="checkbox" checked="checked" value="1" title="12" name="mapObj.currentItemMap['12']" id="mapObj.currentItemMap['12']1">
		<input type="hidden" value="on" name="_mapObj.currentItemMap['12']"></td>
	<td>
		8308M0150</td>
</tr>

Here's the mapObj.currentItemMap actual data: KEY/VALUE pairs

{2=1, 1=1, 12=1}

Findings:
the three (3) checkboxes must be checked but only the last one was checked.

the only difference of the checkboxes are thier KEY.

1st checkbox KEY is '2' (which is one digit)
2nd checkbox KEY is '1' (which is one digit)
3rd checkbox KEY is '12' (which is two digit)

Anyone encountered the same problem? this is very easy to reproduce. Just provide a Map<String, String> in your jsp which the KEYs are one (1) digit.

[eros]

i tried the below case.

Here's the mapObj.currentItemMap actual data:

{a=1, aa=1}

Here's the generated html code:

<tr>
	<td>
		<input type="checkbox" value="1" title="a" name="mapObj.currentItemMap['a']" id="mapObj.currentItemMap['a']1">
		<input type="hidden" value="on" name="_mapObj.currentItemMap['a']"></td>
	<td>
		8316M0680</td>
</tr>
<tr>
	<td>
		<input type="checkbox" checked="checked" value="1" title="aa" name="mapObj.currentItemMap['aa']" id="mapObj.currentItemMap['aa']1">
		<input type="hidden" value="on" name="_mapObj.currentItemMap['aa']"></td>
	<td>
		8317M0770</td>
</tr>

the bug is, checkbox elements must be checked.

[eros]

I am using 2.5.6SEC01 version, this bug was already resolved in 3.x?

[eros]

I accidentally discovered the problem.

During the data binding to Map<String, String> type, single character String type was converted to Character type.

Anyone here encountered the same phenomenon?

[eros]

Overriding the data binding class or some similar approach may solve my problem.

Anyone here, knows what class do I need to override? and functionality to override?