Spring into Java | Your First Real Database with JPA and H2
Welcome back, Midnight Coders ☕🌙
In this episode of Spring into Java, we finally make MediaStack remember things.
We persist books using Spring Data JPA, store them in an H2 file database, and prevent duplicate entries using clean, idempotent service logic.
This is where MediaStack stops being a demo
and starts behaving like a real application.
What You’ll Learn
Configuring H2 for local development
Persisting entities with Spring Data JPA
Enforcing uniqueness with ISBN
Writing safe, idempotent repository logic
Viewing data via H2 Console and IntelliJ Database View
By the end of this video, fetched books are stored, protected, and inspectable.