HTTP Status 404 web.xml problem

name:

7, in the Show input message hello.jsp write the code , as follows:
<% @ page language = "java" pageEncoding = "gbk"%>
<% @ taglib prefix = "s" uri = "/ struts-tags"%>

input content is :




8, error.jsp write error in the information , as follows:

<% @ page language = "java" pageEncoding = "gbk"%>

input is wrong !