DI(Dependency Injection) setter(설정 메소드)를 이용한 주입

GetSum.java

package com.test.diEx01;

public class GetSum {

private int aa;

private int bb;

public int getAa() {

return aa;

}

// public void setAa(int aa) {

// this.aa = aa;

// }

//

// public int getBb() {

// return bb;

// }

public void setBb(int bb) {

this.bb = bb;

}

public void sum(int aa, int bb){

System.out.println("더하기");

int result = aa + bb;

System.out.println("합: "+result);

}

}

MyGetSum.java

package com.test.diEx01;

public class MyGetSum {

public GetSum getsum;

private int a;

private int b;

public MyGetSum(){

}

public void sum(){

getsum.sum(a, b);

}

public void setGetsum(GetSum getsum) {

this.getsum = getsum;

}

public void setA(int a) {

this.a = a;

}

public void setB(int b) {

this.b = b;

}

}

Main.java

package com.test.diEx01;

import org.springframework.context.support.AbstractApplicationContext;

import org.springframework.context.support.GenericXmlApplicationContext;

public class Main {

public static void main(String[] args) {

// MyGetSum myGetSum = new MyGetSum();

// myGetSum.setGetsum(new GetSum());

//

// myGetSum.setA(10);

// myGetSum.setB(100);

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

MyGetSum myGetSum = ctx.getBean("myGetSum", MyGetSum.class);

myGetSum.sum();

}

}

getsum.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="getsum" class="com.test.diEx01.GetSum" />

<bean id="myGetSum" class="com.test.diEx01.MyGetSum">

<property name="getsum">

<ref bean="getsum"/>

</property>

<property name="a" value="10"/>

<property name="b" value="100"/>

</bean>

</beans>