What is Spring?
Before understanding Spring Boot, you need to know its parent: Spring Framework. Spring is a powerful, open-source application framework for Java that simplifies enterprise-level development.
Spring IoC Container
In the previous document, we covered what Spring is at a high level, including a brief mention of Inversion of Control (IoC). Now we'll dive into the mechanics that make Spring work. I consider Spring's entire philosophy to be built on four core concepts:
Understanding a simple Spring Boot app sequence diagram
Now that you understand the Spring Container's role in managing your application's components, let's see how those components work together to handle a real request. Imagine a simple application that:
Project structure
Choosing a project structure is like picking a house blueprint. It dictates where your code "lives" and how it socializes with neighbors.