Spring IoC 세터주입(Setter Injection)을 애노테이션을 이용하여 만들어 보자.

Spring IoC 세터주입(Setter Injection)을 애노테이션을 이용하여 만들어 보자.

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"

       xmlns:context="http://www.springframework.org/schema/context"

       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd

             http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd">

       <description>Example configuration to get you started.</description>

       <context:annotation-config/>  <!—코드 기반의 의존성 요구조건이 가능토록 à

       <context:component-scan base-package="onj.spring.di" />

      

</beans>

2.     CarMaker.java

package onj.spring.di;

public interface CarMaker {

       public Car sell();

}

3.     Audi.java

package onj.spring.di;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.stereotype.Service;

//자바코드에서 주입될 빈이라고 정의함. XML파일에서 "sudi"정의안해도됨

@Service("audi")

public class Audi implements CarMaker {

       private Car car;

      

       public Audi() {}

      

       @Autowired  //이부분은 @Resource(name="car") 라고 해도 결과는 같

       public void setCar(Car car) {

             this.car = car;

       }

      

       public Car sell() {

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

             return car;

       }

}

4.     Car.java

package onj.spring.di;

import org.springframework.stereotype.Service;

@Service("car")   //Car클래스가 Audi setCar의 인자로 들어가야 되므로...빈으로 정의되야 한다.

public class Car {

       private String name;

         public Car() {

         }

         public String getName() {

            return this.name;

         }

         public void setName(String name) {

            this.name  = name;

         }

}

5.     SetterInjectionExam.java

package onj.spring.di;

import org.springframework.context.support.GenericXmlApplicationContext;

public class SetterInjectionExam {

       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