# Spring Boot Annotations Mastery — The Complete Developer Guide
## Why This Guide Exists
Every Spring Boot developer has been there — staring at an annotation, wondering 
"What does this actually do?" or "Should I use @Autowired or constructor injection?"
After mass of mass of tutorials that explain the WHAT but never the WHY, I created 
the guide I wish existed when I started.
## What's Inside
### 📘 Part 1: Core Annotations (10 Pages)
The foundation of every Spring Boot app. Learn @SpringBootApplication (it's actually 
3 annotations in one!), @Configuration, @Bean, @Component family, @Value, and more.
### 📘 Part 2: REST Annotations (10 Pages)  
Build professional REST APIs. Master @RestController, all HTTP method mappings, 
@PathVariable vs @RequestParam, @RequestBody, exception handling with @ControllerAdvice.
### 📘 Part 3: Dependency Injection (10 Pages)
The heart of Spring. Understand @Autowired (and why constructor injection wins), 
@Qualifier, @Primary, @Scope, @Lazy — with real-world scenarios.
### 📘 Part 4: JPA & Data (12 Pages)
Database mastery. @Entity, relationships (@OneToMany, @ManyToOne), @Query, 
@Transactional, Spring Data JPA magic methods, auditing, and more.
### 📘 Part 5: Validation (10 Pages)
Never trust user input. @Valid, @NotNull, @NotBlank, @Size, @Email, @Pattern, 
custom validators, and validation groups.
## What Makes This Different
❌ NOT a boring documentation dump
❌ NOT theoretical fluff
❌ NOT outdated Spring 3.x content
✅ Real code you can copy-paste
✅ Interview questions after each annotation
✅ Comparison tables (e.g., @PathVariable vs @RequestParam)
✅ "When to use" and "When NOT to use" sections
✅ Beautiful Goodnotes-style design
✅ Print-friendly A4 format
## Perfect For
👨‍💻 Java developers learning Spring Boot
🎯 Interview preparation (MNCs, startups, FAANG)
📚 Quick reference while coding
🎓 Computer science students
👨‍🏫 Trainers and educators
## Instant Access
Download all 5 PDFs immediately after purchase. No subscriptions. No upsells. 
Yours forever.
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Created by @techtribers | Building the best tech learning resources for developers