Hi,
Follow the web.xml
<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE web-app
PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd">
<web-app>
<servlet>
<servlet-name>Teste</servlet-name>
<servlet-class>Teste</servlet-class>
</servlet>
<servlet>
<servlet-name>setStatusCode</servlet-name>
<servlet-class>SetStatusCodeServlet</servlet-class>
</servlet>
<servlet>
<servlet-name>sendErrorServlet</servlet-name>
<servlet-class>SendErrorServlet</servlet-class>
</servlet>
<servlet>
<servlet-name>SomaValores</servlet-name>
<servlet-class>SomaValores</servlet-class>
</servlet>
<servlet>
<servlet-name>ErrorPageServlet</servlet-name>
<servlet-class>ErrorPageServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>ErrorPageServlet</servlet-name>
<url-pattern>/Erro</url-pattern>
</servlet-mapping>
<error-page>
<error-code>404</error-code>
<location>/jsp/erro.jsp</location>
</error-page>
<error-page>
<exception-type>java.lang.Throwable</exception-type>
<location>/cert/servlet/ErrorPageServlet</location>
</error-page>
</web-app>
Thanks
