what's the difference between #{} ${} and %{}?

Question

I\'m currently working with struts2, and I just don\'t understand what the difference is between ${var}, #{var}, and %{var} are they d

Answer 1

Just a another note:

You may use $ in your action to ask struts to evaluate your parameters against OGNL before passing it to other methods for example:

Using a custom validator

Struts 2 - reusing Custom Expression Validator

OR

Change the download file name

Struts 2 Download - How to configure the file name dynamically?