java - OGNL中的Struts 2“%”符号和“#”符号

Question

谁能告诉我如何在 STRUTS2 OGNL 中使用“%”和“#”符号？我用谷歌搜索，但找不到任何有价值的信息。或者给我一个文档链接。

谢谢

Answer 1

The % character forces OGNL evaluation, so <s:property name="%{foo}"/> will query the stack for a foo property. It's not always required (rarely, in fact), but it's easier to use it consistently for clarity.

The # character accesses a named value stack context variable, for example, you used to need it to access a variable created using the <s:set> tag. You need it to access things like a session variable, like <s:property name="#session.user.name"/>.

• S2 OGNL Docs
• S2-specific OGNL Docs
• OGNL reference docs