java - Struts 2 "%" sign and '#" sign in OGNL

Question

Anybody can tell me how to use "%" and "#" sign in STRUTS2 OGNL? I google around, but can't find any valuable info about this.Or give me a link of documentation of this.

thanks

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