java - jsp页面的2层大括号是什么意思？

Question

jsp页面的2层大括号是什么意思？如下：
<span>{{$row.sex}}</span>
<p>{{$row.id_card}}</p>
<p>{{$row.mobil}}</p>
<span>{{$row.order_num}}</span>
这里的{{$row.sex}}、{{$row.id_card}}、{{$row.order_num}}是什么意思？谢谢。

Answer 1

Template tag, dynamic data is parsed according to {{与}} as separation during compilation.