Configuring Exception page in web.xml

Instead of showing error page for individual action performed in Servlet,JSP,It is always recommended to configure those error page in web.xml

<web-app>

             <servlet>
                       <!-- some servlet cofiguration -->
             </servlet>

             <servlet-mapping>
                       <!-- some servlet mappings-->
             </servlet-mapping>

            <welcome-file-list>
                         <!-- Welcomefile list configurations-->
            </welcome-file-list>

              <error-page>
                        <error-code>404</error-code>
                        <location>/pagenotfound.jsp</location>
               </error-page>
         
                <error-page>
                         <exception-type>java.lang.Exception</exception-type>
                         <location>/error.jsp</location>
               </error-page>
</web-app>