How to implement the Singleton pattern using Spring Framework capabilities?

In Spring Framework, the Singleton pattern is implemented by default for beans. This means that if you declare a component using annotations like @Component, @Service, @Repository, or through XML configuration, Spring will create a single instance of that bean and use it everywhere it is required.

Example:

@Service
public class MySingletonService {
    public void doSomething() {
        System.out.println("Singleton service is working");
    }
}

When injecting this service into other components via @Autowired, you will always get the same instance.

If you want to explicitly specify the scope, you can use the @Scope("singleton") annotation, but this is not necessary as singleton is the default scope.

Thus, Spring manages the lifecycle and guarantees that the bean will be a singleton within the application context.