OO Programming with Java

2.c The servlet(s) required a deployment descriptor (linking classes to url): the web.xml file.

cat > WEB-INF/web.xml <<EOF
<?xml version="1.0" encoding="UTF-8"?>
<web-app>
  <servlet>
    <servlet-name>Users</servlet-name>
    <servlet-class>Users</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>Users</servlet-name>
    <url-pattern>/Users</url-pattern>
  </servlet-mapping>
</web-app>
EOF

With this file, the servlet is accessible at:
http://127.0.0.1:8080/web/Users

go futher