Can you name the key components of the Spring Framework and describe their roles?

Key components of the Spring Framework and their roles:

• Core Container — the foundation of Spring, includes BeanFactory, which manages the lifecycle and configuration of objects (beans).
• Spring AOP (Aspect-Oriented Programming) — allows implementing cross-cutting concerns (logging, transactions) through aspects, separating them from business logic.
• Data Access/Integration — supports working with databases, including JDBC, ORM (Hibernate, JPA), transactions.
• Web — components for building web applications, including Spring MVC for constructing REST APIs and web interfaces.
• Security — module for authentication and authorization.
• Testing — supports testing of Spring components.

Example of using Core Container to create a bean:

@Configuration
public class AppConfig {
    @Bean
    public MyService myService() {
        return new MyServiceImpl();
    }
}

Spring will automatically create and manage an instance of MyService.