2022.03.23

スプリング三角形と設定について

スプリングレス注入依存性1-作成者による注入依存性

package com.heaven.mvc.expert001_02;

public class Car {
	Tire tire;
	
	//유연성 증가
	public Car(Tire tire) {
		this.tire = tire;
	}
	
	public String getTireBrand() {
		return "장착된 타이어: "+tire.getBrand();
	}
}

package com.heaven.mvc.expert001_02;

public class Driver {
	public static void main(String[] args) {
		Tire tire = new KoreaTire();
		//Tire tire = new AmericaTire();
		Car car = new Car(tire);
		
		System.out.println(car.getTireBrand());
	}
}

スプリングレス注入依存性2-属性注入依存性

package com.heaven.mvc.expert001_03;

public class Car {
	Tire tire;
	
	public String getTireBrand() {
		return "장착된 타이어: "+tire.getBrand();
	}

	public Tire getTire() {
		return tire;
	}

	public void setTire(Tire tire) {
		this.tire = tire;
	}
	
	
	
}

package com.heaven.mvc.expert001_03;

public class Driver {
	public static void main(String[] args) {
		Tire tire = new KoreaTire();
		//Tire tire = new AmericaTire();
		Car car = new Car();
		car.setTire(tire);
		
		System.out.println(car.getTireBrand());
	}
}

スプリング注入依存性-XMLファイルの使用

		//스프링 프레임워크에 대한 정보
		//xml은 원하는 정보를 가진 파일
		ApplicationContext context = new ClassPathXmlApplicationContext("com/heaven/mvc/expert002/expert002.xml");
		
		Tire tire = context.getBean("tire", Tire.class);
		
		Car car = context.getBean("car",Car.class);
		
		car.setTire(tire);

package com.heaven.mvc.expert002;

//스프링 프레임워크에 대한 정보를 가지고 있는 패키지
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class Driver {
	public static void main(String[] args) {
		
		//스프링 프레임워크에 대한 정보
		//xml은 원하는 정보를 가진 파일
		ApplicationContext context = new ClassPathXmlApplicationContext("com/heaven/mvc/expert002/expert002.xml");
		
		Tire tire = context.getBean("tire", Tire.class);
		
		Car car = context.getBean("car",Car.class);
		
		car.setTire(tire);
		
		System.out.println(car.getTireBrand());
	}
}

<?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">

	<!-- 코드의 수정없이 xml수정 만으로도 실행 결과를 바꿀 수 있다. -->
	<bean id="tire" class="com.heaven.mvc.expert002.KoreaTire"></bean>
	<bean id="americaTire" class="com.heaven.mvc.expert002.AmericaTire"></bean>
	
	<bean id="car" class="com.heaven.mvc.expert002.Car"></bean>
</beans>

スプリング注入依存性-スプリング設定ファイル(XML)から属性を注入

		//스프링 프레임워크에 대한 정보
			//xml은 원하는 정보를 가진 파일
			ApplicationContext context = new ClassPathXmlApplicationContext("com/heaven/mvc/expert003/expert003.xml");
		
			Car car = context.getBean("car",Car.class);

		<bean id="koreaTire" class="com.heaven.mvc.expert003.KoreaTire"></bean>
		<bean id="americaTire" class="com.heaven.mvc.expert003.AmericaTire"></bean>
	
		<bean id="car" class="com.heaven.mvc.expert003.Car">
			<!-- setTire()에 koreaTire를 주입 -->
			<property name="tire" ref="americaTire"></property>
		</bean>

スプリング注入依存性-@Autowired注入

<?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.xsd
		http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd">
	
	<!-- anotation을 이용하겠다. -->
	<context:annotation-config/>

	<bean id="tire" class="com.heaven.mvc.expert004.KoreaTire"></bean>
	<bean id="americaTire" class="com.heaven.mvc.expert004.AmericaTire"></bean>
	
	<bean id="car" class="com.heaven.mvc.expert004.Car"></bean>
</beans>

package com.heaven.mvc.expert004;

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

public class Car {
	
	//자동주입
	@Autowired
	Tire tire;
	
	public String getTireBrand() {
		return "장착된 타이어: "+tire.getBrand();
	}

	
	
	
}

package com.heaven.mvc.expert004;

//스프링 프레임워크에 대한 정보를 가지고 있는 패키지
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class Driver {
	public static void main(String[] args) {
		
		//스프링 프레임워크에 대한 정보
		//xml은 원하는 정보를 가진 파일
		ApplicationContext context = new ClassPathXmlApplicationContext("com/heaven/mvc/expert004/expert004.xml");
		
		Car car = context.getBean("car",Car.class);

		System.out.println(car.getTireBrand());
	}
}