如何在中写入表达式

Hello friend I am trying to write Decryption value expression into s:textfield value"<%=custFirstName%>" something like this but it give me an error i.e According to TLD or attribute directive in tag file, attribute value does not accept any expressions so what is the alternate way to do same thing in . Please help me out. in INPUT type its working well but i want to do it same thing through struts tage.Hello friend I am trying to write Decryption va