How is the application context initialized within the Spring Framework?

In the Spring Framework, application context initialization occurs through the creation of an ApplicationContext instance, which loads configuration and manages the lifecycle of beans.

Main initialization methods:

• ClassPathXmlApplicationContext — loads configuration from an XML file located in the classpath.
• AnnotationConfigApplicationContext — loads configuration from Java classes with annotations (@Configuration, @Bean).
• WebApplicationContext — a specialized context for web applications, integrated with the servlet container.

Example of initialization via Java configuration:

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

public class Main {
    public static void main(String[] args) {
        ApplicationContext context = new AnnotationConfigApplicationContext(AppConfig.class);
        MyService service = context.getBean(MyService.class);
        service.doWork();
    }
}

When creating the ApplicationContext, configuration is scanned, beans are created and wired, ensuring inversion of control and dependency injection.