If you’re a newbie just starting to learn Spring, or even if you’ve heard a lot about Spring but not sure what it was, Martin Fowler has an excellent article about this: Inversion of Control and Dependency Injection pattern.
It was a bit old (written in 2004) but every single conceptual discussion still applies today.
If any of the following keyword doesn’t make any sense to you, then I beg you spare 20 minutes of your time to read this excellent article:
- Inversion of Control
- Dependency Injection
- Service Locator