Spring(DI)_02_02

2025-01-21

 

 

 

 

 

 

INFO : org.springframework.beans.factory.xml.XmlBeanDefinitionReader - Loading XML bean definitions from class path resource [message.xml]
INFO : org.springframework.context.support.GenericXmlApplicationContext - Refreshing org.springframework.context.support.GenericXmlApplicationContext@32cf48b7: startup date [Tue Jan 21 21:12:37 KST 2025]; root of context hierarchy
INFO : org.springframework.beans.factory.support.DefaultListableBeanFactory - Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@687e99d8: defining beans [english,korean,msg]; root of factory hierarchy
안녕하세요!!!
INFO : org.springframework.context.support.GenericXmlApplicationContext - Closing org.springframework.context.support.GenericXmlApplicationContext@32cf48b7: startup date [Tue Jan 21 21:12:37 KST 2025]; root of context hierarchy
INFO : org.springframework.beans.factory.support.DefaultListableBeanFactory - Destroying singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@687e99d8: defining beans [english,korean,msg]; root of factory hierarchy

 

package com.spring.di02;

import org.springframework.context.support.GenericXmlApplicationContext;

public class Main {

	public static void main(String[] args) {
		
		GenericXmlApplicationContext container = 
				new GenericXmlApplicationContext("message.xml");
		
		MessageImpl msg = (MessageImpl)container.getBean("msg");
		
		msg.msg();

		container.close();
	}
}

 

package com.spring.di02;

public interface Message {

	void printMsg();	// 추상 메서드
}

 

package com.spring.di02;

public class MessageEn implements Message {

	@Override
	public void printMsg() {
		System.out.println("Hello!!!");
	}

}

 

package com.spring.di02;

import lombok.Data;

@Data
public class MessageImpl {

	private Message message;
	
	// 비지니스 로직
	public void msg() {
		message.printMsg();
	}
}

 

package com.spring.di02;

public class MessageKr implements Message {

	@Override
	public void printMsg() {
		System.out.println("안녕하세요!!!");
	}

}

 

<?xml version="1.0" encoding="UTF-8"?>
<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="english" class="com.spring.di02.MessageEn"/>
	
	<bean id="korean" class="com.spring.di02.MessageKr"/>
	
	<bean id="msg" class="com.spring.di02.MessageImpl">
		<!-- name="message" ==> 변수명 -->
		<property name="message" ref="korean"/>
	</bean>

</beans>