A @Bean annotation supports determining discretionary introductions and obliteration callback functions. If you noticed beans.xml in the XMLBasedSpringConfiguration project, you can find the init-method and destroy-method attributes. Here's an example of how to initialize the init-method and destroy-method attributes:

<bean id="userGreeting" class="ktPackage.UserGreeting" init-method="afterPropertiesSet" destroy-method="destroy"/>

Here's the modified code of MainAppLifeCall.kt:

fun main(args: Array<String>) {
    val applicationContext = AnnotationConfigApplicationContext(ConfigFoo::class.java)

    val foo: Foo = applicationContext.getBean(Foo::class.java)
    applicationContext.registerShutdownHook()
}

The modified code of Foo.kt is as follows:

class Foo{
    fun init(){
        println("Foo is initializing...")
    }

    fun destroy(){
        println("Foo is destroying...")
    }
}

Now create a configuration class for Foo. The modified code of ConfigFoo.kt is as follows:

@Configuration
open class ConfigFoo {
    @Bean(initMethod = "init", destroyMethod = "destroy")
    open fun foo(): Foo {
        return Foo()
    }
}

The output of this project will be as follows: 

Foo is initializing...
Foo is destroying...