What are the different types of Spring annotations?

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In Spring Framework, annotations simplify configuration by reducing the need for lengthy XML files. Here are the main types:

1. Stereotype Annotations – Mark classes for Spring to detect:

   • @Component – Generic Spring-managed component.

   • @Service – Service layer component.

   • @Repository – DAO layer, with automatic exception translation.

   • @Controller – Handles web requests in Spring MVC.

2. Dependency Injection Annotations – Manage object wiring:

   • @Autowired – Automatically injects dependencies.

   • @Qualifier – Specifies which bean to inject when multiple exist.

   • @Value – Injects values from properties files or expressions.

3. Configuration Annotations – Define bean creation and configuration:

   • @Configuration – Marks a class as a source of bean definitions.

   • @Bean – Defines a bean within @Configuration.

   • @PropertySource – Loads properties files.

4. Spring MVC Annotations – For web applications:

   • @RequestMapping – Maps HTTP requests to handler methods.

   • @GetMapping, @PostMapping – Shortcut mappings for HTTP methods.

   • @PathVariable, @RequestParam – Bind URL parameters to method arguments.

   • @RestController – Combines @Controller + @ResponseBody for REST APIs.

5. Transactional & Other –

   • @Transactional – Manages transactions.

   • @EnableScheduling, @Scheduled – For scheduled tasks.

These annotations make Spring applications easier to configure, maintain, and extend.

Read More :

Explain the Bean life cycle in Spring.

What are the types of dependency injection in Spring?

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