error: package javax.servlet does not exist

Question

I was trying to implement a login filter in my web app with jsf 2, following this guide:

https://stackoverflow.com/tags/servlet-filters/info

after I compiled

Answer 1

I needed to import javaee-api as well.

  
     javax
     javaee-api
     7.0
  

Unless I got following error:

package javax.servlet.http does not exist
javax.servlet.annotation does not exist
javax.servlet.http does not exist
...