Vòng đời của Bean trong Spring

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<project xmlns="http://maven.apache.org/POM/4.0.0"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>net.javaguides.spring</groupId>
    <artifactId>spring-bean-lifecycle</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <url>http://maven.apache.org</url>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

    <dependencies>
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-context -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>5.1.0.RELEASE</version>
        </dependency>  
    </dependencies>
    <build>
     <sourceDirectory>src/main/java</sourceDirectory>
         <plugins>
            <plugin>
               <artifactId>maven-compiler-plugin</artifactId>
               <version>3.5.1</version>
               <configuration>
                   <source>1.8</source>
                   <target>1.8</target>
               </configuration>
           </plugin>
         </plugins>
     </build>
</project>

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import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import org.springframework.beans.factory.DisposableBean;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.stereotype.Component;

@Component
public class DatabaseInitiaizer implements InitializingBean, DisposableBean {

    private List < User > listOfUsers = new ArrayList < > ();

    @Override
    public void afterPropertiesSet() throws Exception {
        User user = new User(1, "User");
        User user1 = new User(2, "Admin");
        User user2 = new User(3, "SuperAdmin");

        listOfUsers.add(user);
        listOfUsers.add(user1);
        listOfUsers.add(user2);
        System.out.println("-----------List of users added in init() method ------------");
        for (Iterator < User > iterator = listOfUsers.iterator(); iterator.hasNext();) {
            User user3 = (User) iterator.next();
            System.out.println(user3.toString());
        }
        // save to database
    }

    @Override
    public void destroy() {
        // Delete from database
        listOfUsers.clear();
        System.out.println("-----------After of users removed from List in destroy() method ------------");
        for (Iterator < User > iterator = listOfUsers.iterator(); iterator.hasNext();) {
            User user3 = (User) iterator.next();
            System.out.println(user3.toString());
        }
        System.out.println("List is clean up ..");
    }
}