The document provides an overview of a Spring framework application demonstrating Inversion of Control (IoC) and Dependency Injection (DI) using annotations. It outlines various components such as Money, Car, and different CarMaker implementations, along with their interaction through an OrderManager. Additionally, it includes XML configuration for the application context and example Java classes illustrating the usage of these components.

1. Spring Framework
Spring IoC & DI
Spring IoC 실습
(어노테이션기반, 인터페이스, 세터주입)

2. Spring Framework_Spring Ioc & DI
Spring IoC & DI
package edu.biz.ioc4;
import org.springframework.stereotype.Component;
@Component("money") // DTO같은 컴포넌트 클래스임을 의미, @Named와 동일
public class Money {
private int amount;
public Money() {
}
public Money(int amt) {
this.amount = amt;
}
public int getAmount() {
return amount;
}
public void setAmount(int amount) {
this.amount = amount;
}
3. Spring IoC 실습 (어노테이션 기반, 인터페이스, 세터주입)
2-2에서 작성한 예제를 어노테이션 기반으로 변경해 보자.
[Money.java]

3. Spring Framework_Spring Ioc & DI
package edu.biz.ioc4;
import org.springframework.stereotype.Component;
@Component("car")
public class Car {
private String name;
public Car() {
}
public Car(String name) {
this.name = name;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
[Car.java]

4. Spring Framework_Spring Ioc & DI
package edu.biz.ioc4;
public interface CarMaker {
//돈을 받고 차를 판다
public Car sell(Money money) ;
}
[CarMaker.java]
[HyundaiMaker.java]
package edu.biz.ioc4;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
@Service("hyundai") //@Named와 동일, 서비스계층의 클래스임을 의미
public class HyundaiMaker implements CarMaker{
@Autowired //@Inject와 동일
private Car car;
public Car sell(Money money) {
System.out.println("I sold a Sonata.");
car.setName("Sonata");
return car;
}
}

5. Spring Framework_Spring Ioc & DI
package edu.biz.ioc4;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
@Service(“daewoo")
public class DaewooMaker implements CarMaker{
@Autowired
private Car car;
public Car sell(Money money) {
System.out.println("I sold a Tosca.");
car.setName(“Tosca");
return car;
}
}
[DaewooMaker.java]

6. Spring Framework_Spring Ioc & DI
package edu.biz.ioc4;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Service;
@Service("orderManager")
public class OrderManager {
private String name;
@Autowired // TYPE이 CarMaker 인것 찾아 자동 주입, 여러 개인 경우 Qualifier로 지정
@Qualifier("daewoo")
private CarMaker maker;
@Autowired // TYPE이 Money 인 것을 찾아 자동 주입
private Money money;
public OrderManager() {
}
public void order() {
money.setAmount(1000);
Car car = this.maker.sell(money);
}
}
[OrderManager.java]

7. Spring Framework_Spring Ioc & DI
<?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-4.2.xsd">
<beans>
<context:annotation-config/> ←생략가능!!→
<context:component-scan base-package="edu.biz.ioc4"/>
</beans>
[ioc4.xml]

8. Spring Framework_Spring Ioc & DI
package edu.biz.ioc4;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class OrderManagerApp {
public static void main(String[] args) {
ApplicationContext factory = new
ClassPathXmlApplicationContext("classpath:ioc4.xml");
OrderManager manager = (OrderManager)
factory.getBean("orderManager");
manager.order();
}
}
[OrderManagerApp.java]
 실행 후 결과를 확인하자.

9. Spring Framework_Spring Ioc & DI
package edu.biz.ioc4;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.stereotype.Service;
@Service
public class OrderManagerApp {
//생성자가 아닌 직접 autowiring은 불가, static 변수는 autowiring 안된다.
static OrderManager orderManager;
@Autowired
public OrderManagerApp(OrderManager orderManager) {
OrderManagerApp.orderManager = orderManager;
}
public static void main(String[] args) {
ApplicationContext factory =
new ClassPathXmlApplicationContext("classpath:ioc4.xml");
//OrderManager manager = (OrderManager)
factory.getBean("orderManager");
orderManager.order();
}
}
[수정된 OrderManagerApp.java]