Spring Framework Beans: Core Concepts 🌱

Spring Framework Beans are the building blocks of Spring applications. Here's a quick breakdown:

📌 What are Beans?

• Definition: A Bean is a Java object managed by the Spring IoC container.
• Key Features:
  • Managed by Spring's DI (Dependency Injection) system
  • Configured via XML, annotations, or Java code
  • Can be singleton, prototype, or scoped (e.g., request, session)

🧠 Bean Lifecycle Stages

1. Instantiation 📦
   Spring creates the bean instance using the constructor.
2. Population of Properties 🔁
   Dependencies are injected via setters or constructors.
3. Aware Interfaces 🎯
   Beans can access Spring infrastructure (e.g., ApplicationContextAware).
4. BeanPostProcessor 🛠
   Custom logic can be applied before/after initialization.
5. Initialization ✅
   Methods like @PostConstruct or init-method are called.
6. Usage 🚀
   The bean is ready for application use.
7. ** Destruction ** ❌
   @PreDestroy or destroy-method is invoked when the container shuts down.

📚 Recommended Reading

• Spring Framework Dependency Injection Guide
• Bean Scope Configuration Examples

For visual learners, check out our Spring Boot Video Series to see Beans in action! 🎥