56. Setter 메서드를 통한 주입

우리가 지난시간에 생성자를 통해서 객체를 생성할때 값을 주입하는 것에 대해서 알아보았다.

 

이번에는 Setter메서드를 통해서 값을 주입하는 방법에 대해서 알아보자.

 

 

MainClass.java

 

package kr.co.softcampus.main;

import org.springframework.context.support.ClassPathXmlApplicationContext;

import kr.co.softcampus.beans.TestBean;

public class MainClass {

	public static void main(String[] args) {
		// TODO Auto-generated method stub

		TestBean obj1 = new TestBean();
		
		obj1.setData1(100);
		
		System.out.printf("obj.data1 : %d\n",obj1.getData1());
		
		ClassPathXmlApplicationContext ctx = new ClassPathXmlApplicationContext("kr/co/softcampus/config/beans.xml");
		
		TestBean t1 = ctx.getBean("t1",TestBean.class);
		System.out.printf("t1.data1 : %d\n", t1.getData1());
		System.out.printf("t1.data2 : %d\n", t1.getData2());
		System.out.printf("t1.data3 : %d\n", t1.isData3());
		System.out.printf("t1.data4 : %d\n", t1.getData4());
		System.out.printf("t1.data5: %d\n", t1.getData5());
		System.out.printf("t1.data6: %d\n", t1.getData6());
		
		
		ctx.close();
	}

}

 

beans.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"
	                	   default-init-method="default-init" default-destroy-method="default-destroy">

	<bean id="t1" class="kr.co.softcampus.beans.TestBean">
	<property name="data1" value="100"></property>
	<!-- setData1() 메소드와 같다.  -->
	<property name="data2" value="11.11"></property>
	<!-- setData1() 메소드와 같다.  -->
	<property name="data3" value="true"></property>
	<!-- setData1() 메소드와 같다.  -->
	<property name="data4" value="안녕하세요"></property>
	<!-- setData1() 메소드와 같다.  -->
	<property name="data5" value="안녕하세요">
	<!-- setData1() 메소드와 같다.  -->
	<bean class="kr.co.softcampus.beans.DataBean"/>
	</property>
	
	<property name="data6" ref="data_bean"></property>
	<!-- //이미 정의된 bean객체를 여기다가 주입할때는 ref를 사용하면 된다.
	 --></bean>


<bean id="data_bean" class="kr.co.softcampus.beans.DataBean"/>
</beans>

 

TestBean.java

 

package kr.co.softcampus.beans;

public class TestBean {

	private int data1;
	private double data2;
	private boolean data3;
	private String data4;
	private DataBean data5;
	private DataBean data6;
	
	
	public int getData1() {
		return data1;
	}

	public void setData1(int data1) {
		this.data1 = data1;
	}

	public double getData2() {
		return data2;
	}

	public void setData2(double data2) {
		this.data2 = data2;
	}

	public boolean isData3() {
		return data3;
	}

	public void setData3(boolean data3) {
		this.data3 = data3;
	}

	public String getData4() {
		return data4;
	}

	public void setData4(String data4) {
		this.data4 = data4;
	}

	public DataBean getData5() {
		return data5;
	}

	public void setData5(DataBean data5) {
		this.data5 = data5;
	}

	public DataBean getData6() {
		return data6;
	}

	public void setData6(DataBean data6) {
		this.data6 = data6;
	}
	
	
	
	
}

 

DataBean.java

 

package kr.co.softcampus.beans;

public class DataBean {

}