main메소드에서 getBean()을 생성자주입으로[Spring DI,Constructor Injection]

main메소드에서 getBean()을 생성자주입으로 대체한 예제[Spring DI,Constructor Injection]

0. Money.java

package edu.biz.ioc4;

import org.springframework.stereotype.Component;

@Component("money")

public class Money {

private int amount;

public Money() {

}

public Money(int amt) {

this.amount = amt;

}

public int getAmount() {

return amount;

}

public void setAmount(int amount) {

this.amount = amount;

}

}

1. Car.java

package edu.biz.ioc4;

import org.springframework.stereotype.Component;

@Component("car")

public class Car {

private String name;

public Car() {}

public Car(String name) {

this.name = name;

}

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

}

2. CarMaker.java

package edu.biz.ioc4;

public interface CarMaker {

public Car sell(Money money);

}

3. DaewooMaker.java

package edu.biz.ioc4;

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

import org.springframework.stereotype.Service;

@Service("daewoo")

public class DaewooMaker implements CarMaker {

@Autowired

private Car car;

public Car sell(Money money) {

//차를 팔기전에 할 일들

System.out.println("I sold a Tosca.");

car.setName("Tosca");

return car;

}

}

4. HyundaiMaker.java

package edu.biz.ioc4;

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

import org.springframework.stereotype.Service;

@Service("hyundai")

public class HyundaiMaker implements CarMaker{

@Autowired

private Car car;

public Car sell(Money money) {

//차를 팔기전에 할 일들

System.out.println("I sold a Sonata.");

car.setName("Sonata");

return car;

}

}

5. OrderManager.java

package edu.biz.ioc4;

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

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

import org.springframework.stereotype.Service;

@Service("oraderManager")

public class OrderManager {

private String name;

@Autowired

@Qualifier("daewoo")

private CarMaker carMaker;

@Autowired

private Money money;

public OrderManager() {

}

public void order() {

money.setAmount(1000);

Car car = this.carMaker.sell(money);

}    

}

6. OrderManagerapp.java

package edu.biz.ioc4;

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

import org.springframework.context.ApplicationContext;

import org.springframework.context.support.ClassPathXmlApplicationContext;

import org.springframework.stereotype.Service;

@Service

public class OrderManagerApp {

static OrderManager orderManager;

@Autowired

public OrderManagerApp(OrderManager orderManager) {

OrderManagerApp.orderManager = orderManager;

}

public static void main(String[] args) {

ApplicationContext factory =   

new ClassPathXmlApplicationContext("classpath:ioc4.xml");

//OrderManager manager = (OrderManager) factory.getBean("orderManager");

orderManager.order();

}

}

8. src/main/resource/ioc4.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.xsd

http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd">

<context:annotation-config/>

<context:component-scan base-package="edu.biz.ioc4"/>

</beans>

[결과]

SLF4J: Class path contains multiple SLF4J bindings.

SLF4J: Found binding in [jar:file:/C:/java2/lib/slf4j-log4j12-1.7.5.jar!/org/slf4j/impl/StaticLoggerBinder.class]

SLF4J: Found binding in [jar:file:/C:/Documents%20and%20Settings/Administrator/.m2/repository/ch/qos/logback/logback-classic/1.0.13/logback-classic-1.0.13.jar!/org/slf4j/impl/StaticLoggerBinder.class]

SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.

SLF4J: Actual binding is of type [org.slf4j.impl.Log4jLoggerFactory]

INFO : org.springframework.context.support.ClassPathXmlApplicationContext - Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@104a311: startup date [Sat Feb 07 19:58:12 KST 2015]; root of context hierarchy

INFO : org.springframework.beans.factory.xml.XmlBeanDefinitionReader - Loading XML bean definitions from class path resource [ioc4.xml]

INFO : org.springframework.beans.factory.support.DefaultListableBeanFactory - Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@bdb19: defining beans [org.springframework.context.annotation.internalConfigurationAnnotationProcessor,org.springframework.context.annotation.internalAutowiredAnnotationProcessor,org.springframework.context.annotation.internalRequiredAnnotationProcessor,org.springframework.context.annotation.internalCommonAnnotationProcessor,org.springframework.context.annotation.internalPersistenceAnnotationProcessor,car,daewoo,hyundai,money,oraderManager,orderManagerApp,org.springframework.context.annotation.ConfigurationClassPostProcessor.importAwareProcessor]; root of factory hierarchy

I sold a Tosca.