如何在 Jquery 选择器中使用 JSTL var
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How to use JSTL var in Jquery selector
提问by xyz
I am using following Jquery selector
我正在使用以下 Jquery 选择器
$("#selectedQuery td input:radio").attr('checked', true);
Where selectedQueryis a JSTL variable declared as
selectedQueryJSTL 变量在哪里声明为
<c:set var="selectedQuery" value="${dataRequestForm.queryMasterId}" />
I tested the selector with hard coded values and it's working fine but no luck when used with selectedQuery.
How can we use JSTL <c:set>var in Jquery ? Is there any work around ?
我用硬编码值测试了选择器，它工作正常，但与selectedQuery.
我们如何<c:set>在 Jquery 中使用 JSTL var？有什么解决办法吗？
回答by davidnortonjr
Mixing JSTL code in with the JavaScript can cause your code to become really jumbled. If it's unavoidable, I have all my JSTL variables set to JavaScript variables in one place:
将 JSTL 代码与 JavaScript 混合可能会导致您的代码变得非常混乱。如果不可避免，我会将所有 JSTL 变量都设置在一处：
<c:set var="selectedQuery" value="${dataRequestForm.queryMasterId}" />
<script type="text/javascript">
//NOTE: we are sure 'selectedQuery' does not contain any double-quotes,
// but most values will need to be escaped before doing this.
var selectedQuery = "${selectedQuery}";
// etc.
</script>
...
<script type="text/javascript">
$("#" + selectedQuery + " td input:radio").attr('checked', true);
</script>
回答by Matt Ball
In a JSP:
在 JSP 中：
<c:set var="selectedQuery" value="${dataRequestForm.queryMasterId}" />
<script>
$("#${selectedQuery} td input:radio").attr('checked', true);
</script>
回答by aroth
I do stuff like that all the time. The JSP parser doesn't know or care about the difference between the contents of a <script>tag (whether using jQuery or not) and any other content in the JSP page.
我一直在做这样的事情。JSP 解析器不知道也不关心<script>标记的内容（无论是否使用 jQuery）与 JSP 页面中的任何其他内容之间的区别。
It should work fine if you do:
如果您这样做，它应该可以正常工作：
<c:set var="selectedQuery" value="${dataRequestForm.queryMasterId}" />
...
<script>
$("#${selectedQuery} td input:radio").attr('checked', true);
</script>
Note that this requires that the <script>element with your jQuery selector be inside of the same page/JSP scope as your <c:set>. If they aren't in the same scope then of course this will not work.
请注意，这要求<script>带有 jQuery 选择器的元素与<c:set>. 如果它们不在同一范围内，那么这当然不起作用。
