[英]s:iterator over Map with a dynamic key parameter
I have a problem with the inner iterator in the following Struts2 JSP: 我在下面的Struts2 JSP中遇到了内部迭代器的问题:
<s:iterator value="thatCompany.tags" var="tagGroups">
<tr>
<td><s:property value="#tagGroups.key" /></td><!-- this works nicely! -->
<td>
<ul>
<s:iterator value="{thisCompany.tags['#tagGroups.key']}" var="thisTagGroup">
<!-- doesn't work, displays one empty LI element -->
<li> <s:property value="#thisTagGroup.key"/>
</s:iterator>
</ul>
</td>
<!-- snip -->
thisCompany.tags and thatCompany.tags are both of type Map<String, Map<BigDecimal, String>>
thisCompany.tags和thatCompany.tags都是
Map<String, Map<BigDecimal, String>>
Got it, this syntax works: 知道了,这个语法有效:
<s:iterator value="thisCompany.tags[#tagGroups.key]" var="foobar">
<li> <s:property value="#foobar.value"/>
</s:iterator>
But this is weird: if I name the variable thisTagGroup instead of foobar it doesn't work anymore. 但这很奇怪:如果我将变量命名为thisTagGroup而不是foobar,它就不再起作用了。 Is it because this is somehow reserved and variable names cannot even begin with this- ?
难道是因为这是莫名其妙地保留和变量名,甚至不能用这个-开始呢?
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