DI 의 장점( Interface)

Car.java

package com.test.diEx05;

public interface Car {

public void drive();

}

HDCar.java

package com.test.diEx05;

public class HDCar implements Car {

public void drive(){

System.out.println("현대차를 운전");

}

}

DWCar.java

package com.test.diEx05;

public class DWCar implements Car{

public void drive(){

System.out.println("대우차 운전");

}

}

KiaCar.java

package com.test.diEx05;

public class KiaCar implements Car {

public void drive(){

System.out.println("기아차 운전");

}

}

Main.java

package com.test.diEx05;

import org.springframework.context.support.AbstractApplicationContext;

import org.springframework.context.support.GenericApplicationContext;

import org.springframework.context.support.GenericXmlApplicationContext;

public class Main {

public static void main(String[] args) {

AbstractApplicationContext ctx = new GenericXmlApplicationContext("classpath:car.xml");

Car car = ctx.getBean("car",Car.class);

car.drive();

}

}

car.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="com.test.diEx05.KiaCar" />

<!-- 

<bean id="car" class="com.test.diEx05.HDCar" />

<bean id="car" class="com.test.diEx05.DWCar" />

-->

</beans>