Spring & Spring Boot Annotations Masterclass | 45+ Key Annotations Explained with Example | 2026

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. --- 🔎 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/... Spring and Spring Boot annotations course 🔗    • Mastering the Spring and Spring Boot Annot...   For business inquires, please write to us at below email id : 📧 contactthinkconstructive@gmail.com 🔔 Subscribe for more Java, Spring , Spring Boot & Microservices tutorials! https://bit.ly/thinkconstructive Let's get connected 🤝 YouTube: https://bit.ly/thinkconstructive Official Website: https://thinkconstructive.com/ Instagram:   / thinkconstructive   WhatsApp Channel: https://bit.ly/3M07hRC Spring Boot 3 Complete Project -    • Spring Boot REST API Spring Security Mongo...   Java Spring Boot -    • Spring Boot REST API Complete Project   Microservices using Java Spring Boot , Spring Cloud -    • Microservices Tutorial with Java Spring Bo...   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