问题
What is the exact use of %{} notation in Struts 2? Can someone explain with a simple example where the code works when %{} is used and does not works when its not used?
回答1:
Used in OGNL to force evaluate the content in brackets as OGNL expression. For example
<s:iterator value = "myAnswers" status="stat">
<s:textfield name = "myAnswers[%{#stat.index}].name"/>
evaluation of the stat.index should be forced.
来源：https://stackoverflow.com/questions/18491659/struts-2-the-usage-of-notation