[ORACLEJAVA개발자실무교육,오엔제이프로그래밍실무교육센터, Spring Framework3.2]Spring IoC, DI 생성자 주입(Constructor Injection)

Spring IoC 생성자 주입(Constructor Injection)을 XML기반으로 이용하여 만들어 보자.

오라클자바커뮤니티에서 설립한 오엔제이프로그래밍 실무교육센터

(오라클SQL, 튜닝, 힌트,자바프레임워크, 안드로이드, 아이폰, 닷넷  실무전문 강의)

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1.     /src/main/resources/xmlBeanFactory.xml

<?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="car" class="onj.spring.di2.Car"/>

       <bean id="audi" class="onj.spring.di2.Audi">

             <constructor-arg name="car"><ref bean="car"/></constructor-arg>  

       </bean>     

</beans>

2.     CarMaker.java

package onj.spring.di2;

public interface CarMaker {

       public Car sell();

}

3.     Audi.java

package onj.spring.di2;

//Audi의 인스턴스가 생성될 때 Car 인스턴스를 주입받는다.

public class Audi implements CarMaker {

       private Car car;

      

       public Audi(Car car) {  //생성자 주입

             this.car = car;

       }

      

       public Car sell() {

             this.car.setName("Audi A6");

             return car;

       }

}

4.     Car.java

package onj.spring.di2;

//Audi에 주입될 클래스이므로 car 라는 이름으로 XML 파일에서 빈정의함

public class Car {

       private String name;

         public Car() {

         }

         public String getName() {

            return this.name;

         }

         public void setName(String name) {

            this.name  = name;

         }

}

5.     ConstructorInjectionExam.java

package onj.spring.di2;

import org.springframework.context.support.GenericXmlApplicationContext;

public class ConstructorInjectionExam {

       public static void main(String[] args) {

             GenericXmlApplicationContext ctx = new GenericXmlApplicationContext();

             ctx.load("classpath:xmlBeanFactory.xml");

             ctx.refresh();

            

             CarMaker carMaker = ctx.getBean("audi", Audi.class);

             Car c = carMaker.sell();

             System.out.println("I sold a car... " + c.getName());

       }

}

6.     [결과]

I sold a car... Audi A6 

[출처] 오라클자바커뮤니티 - http://www.onjprogramming.co.kr/oraclejavanew/oraclejava/bbs/board.php?bo_table=LecSpring&wr_id=195