I put a String into a session,and I use <s:if> to determine the session if it is exist,if exist,show OK,if not exist,it shows error,but when I run it,it shows error,I don't know why don't show OK? How to correct to show OK? my code is follows: <%@ page contentType="text/html; charset=UTF-8" %> <%@ taglib uri="/struts-tags" prefix="s" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd";> <html xmlns="http://www.w3.org/1999/xhtml"; xml:lang="en" lang="en"> <head> </head> <% request.setAttribute("tt",new String("1")); %> <body> <s:if test="Session.tt?exists"> OK </s:if> <s:else> Error </s:else> </body> </html>
