javax.servlet.ServletConfig <init-param>

<web-app ...>
  ...
  <servlet>
    ...
    <init-param>
      <param-name>databaseURL</param-name>
      <param-value>jdbc:mysql://localhost:3306/ebookshop</param-value>
    </init-param>

    <init-param>
      <param-name>user</param-name>
      <param-value>myuser</param-value>
    </init-param>
  </servlet>
  ...
</web-app>