Spring Boot Dependency Injection Field vs Setter vs Constructor Injection Session 8

Spring Boot Dependency Injection Explained | Field, Setter & Constructor Injection | Session 8 In this session, we’ll understand Dependency Injection (DI) in Spring Boot in a very simple and practical way. Instead of just learning the definition, we’ll understand how Dependency Injection works, why we need it, and the 3 major types of Dependency Injection with easy examples. 📌 In this session, you will learn: ✅ What is Dependency Injection? ✅ Why do we need Dependency Injection? ✅ How Spring manages and injects dependencies ✅ Field Injection with example ✅ Setter Injection with example ✅ Constructor Injection with example ✅ Advantages & disadvantages of each type ✅ Field Injection vs Setter Injection vs Constructor Injection ✅ Which type is preferred in real-world Spring Boot projects? ✅ Practical example to understand DI clearly 💡 Important takeaway: Constructor Injection is generally preferred for mandatory dependencies because it makes dependencies explicit, improves testability, and supports immutable fields.