如何将Spring Bean配置为多例模式？请给出配置示例。

import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Component;

@Component
@Scope("prototype")
public class MyPrototypeBean {
    public MyPrototypeBean() {
        System.out.println("MyPrototypeBean instance created");
    }

    public void sayHello() {
        System.out.println("Hello from MyPrototypeBean!");
    }
}

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.ComponentScan;

@Configuration
@ComponentScan(basePackages = "com.example")
public class AppConfig {
    // 配置扫描包，使得Spring可以发现MyPrototypeBean类
}

import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;

public class MainApp {
    public static void main(String[] args) {
        ApplicationContext context = new AnnotationConfigApplicationContext(AppConfig.class);

        // 获取MyPrototypeBean实例
        MyPrototypeBean bean1 = context.getBean(MyPrototypeBean.class);
        bean1.sayHello();

        MyPrototypeBean bean2 = context.getBean(MyPrototypeBean.class);
        bean2.sayHello();

        // 输出：创建了两个不同的Bean实例，且每次获取时输出"instance created"。
    }
}

<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
           http://www.springframework.org/schema/beans/spring-beans.xsd">

    <bean id="myPrototypeBean" class="com.example.MyPrototypeBean" scope="prototype"/>
</beans>

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class MainApp {
    public static void main(String[] args) {
        ApplicationContext context = new ClassPathXmlApplicationContext("beans.xml");

        // 获取MyPrototypeBean实例
        MyPrototypeBean bean1 = context.getBean(MyPrototypeBean.class);
        bean1.sayHello();

        MyPrototypeBean bean2 = context.getBean(MyPrototypeBean.class);
        bean2.sayHello();

        // 输出：创建了两个不同的Bean实例，且每次获取时输出"instance created"。
    }
}