Spring & Spring Boot Annotations Masterclass | 45+ Key Annotations Explained with Example | 2026
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Spring & Spring Boot Annotations Masterclass | 45+ Key Annotations Explained with Examples
Confused by the many annotations in Spring Framework and Spring Boot? In this masterclass, we break down 45+ important Spring & Spring Boot annotations with practical examples so you can understand not just what they do, but when and why to use them.
From dependency injection and configuration to REST APIs, database integration, and Spring Boot application setup, this video covers the annotations you’ll encounter in real-world Java Spring Boot projects.
### 📚 What You’ll Learn
🔹 **Core Spring Annotations**
* `@Component`
* `@Service`
* `@Repository`
* `@Controller`
🔹 **Dependency Injection**
* `@Autowired`
* `@Qualifier`
* `@Primary`
* `@Value`
🔹 **Configuration & Bean Management**
* `@Bean`
* `@Configuration`
* `@ComponentScan`
* `@Profile`
* `@Lazy`
🔹 **Properties & Spring Boot**
* `@PropertySource`
* `@PropertySources`
* `@ConfigurationProperties`
* `@SpringBootApplication`
🔹 **REST API Annotations**
* `@RestController`
* `@ResponseBody`
* `@RequestMapping`
* `@GetMapping`
* `@PostMapping`
* `@PutMapping`
* `@DeleteMapping`
* `@RequestBody`
* `@PathVariable`
🔹 **Persistence & Transactions**
* `@Entity`
* `@Id`
* `@Transactional`
…and many more important annotations used in production Spring Boot applications.
### 🎯 Who Is This Video For?
✔ Java developers learning Spring Boot
✔ Beginners starting with Spring Framework
✔ Developers preparing for Spring Boot interviews
✔ Experienced developers looking to strengthen their fundamentals
✔ Anyone who wants a practical reference for Spring annotations
💡 **Think Constructive** — Build • Understand • Deploy
If you find this masterclass useful, LIKE 👍, SUBSCRIBE 🔔, HYPE, and SHARE it with other Java & Spring Boot developers.
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### 🔎 Topics Covered
Spring Framework, Spring Boot, Spring annotations, Spring Boot annotations, Spring Boot tutorial, Spring Framework tutorial, dependency injection, Spring IoC, REST API, Spring REST, Spring configuration, Spring Boot interview questions, Java backend development, Spring Boot masterclass.
#SpringBoot #SpringFramework #Java #SpringAnnotations #SpringBootTutorial #JavaDeveloper #BackendDevelopment #RESTAPI #ThinkConstructive #EshaPuri #SoftwareEngineer #SoftwareDeveloper #JavaProgrammer #JavaInterview #SpringBootInterview #SpringBootProject
Github link 🔗 https://github.com/thinkconstructive/annotations-demo
Spring and Spring Boot annotations course 🔗 https://www.youtube.com/playlist?list=PLcs1FElCmEu2YbE605h5kZ730744n3N4K
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Chapters 📚
00:00:00 Introduction
00:00:10 What Are Spring Annotations?
00:01:27 @Component
00:11:49 @Autowired
00:21:03 @Bean and @Configuration
00:55:44 @Bean vs. @Component
01:04:12 @Qualifier and @Primary , @Qualifier vs. @Primary
01:24:06 @Value
01:46:52 @PropertySource and @PropertySources
02:03:30 @ConfigurationProperties
02:18:39 @SpringBootApplication
02:23:24 @Profile
02:43:55 Stereotype Annotations @RestController, @Service & @Repository, @Entity, @Id and more
03:11:52 Spring Web Annotations @GetMapping , @PostMapping, @PutMapping, DeleteMapping, @RequestBody, @PathVariable and more
03:38:47 @Transactional
04:12:37 @Lazy
04:32:09 Summary and Outro
Queries ⁉️
Spring Boot Annotations Full Course
Spring Boot Annotations Cheat Sheet
Spring Boot Important Annotations
Spring Boot Annotations
Spring Boot REST API
Java Spring Boot Interview Questions
Commonly Used Spring Boot Annotations