This is my small guestbook application written in plain Java, without any frameworks and libraries.
Features:
- REST & JSON
- Users and authentication
- Data persistence
- Simple EL parser
- Template engine.
All of these completely without any frameworks or libraries.
- ~ 800 lines of code,
- ~ 1200 with comments
- ~70kb final executable JAR
See it in action on Youtube.
Written for my article (russian).