요구사항

* 하나의 interface 기반하에서 "Hello World!" 와 "Hi World!" 메시지를 출력해야 한다.

* 출력하는 메시지를 생성하는 부분과 생성된 메시지를 Rendering 하는 부분이 분리되어야 한다.

Dependency Injection

 

 

interface MessageProvider

package net.slipp.dl;

public interface MessageProvider {
	
	String getMessage();
}

 

class MessageRender

package net.slipp.dl;


import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class MessageRender {
	
	private MessageProvider messageProvider;
	
	public void setMessageProvider(MessageProvider messageProvider) {
		this.messageProvider = messageProvider;
	}
	
	public void render(){
		System.out.println(messageProvider.getMessage());
	}
	
	
	public static void main(String[] args) {
/*		MessageRender renderer=new MessageRender();
		renderer.setMessageProvider(new HelloWorldMessageProvider());
		renderer.render();
		
		renderer.setMessageProvider(new HiWorldMessageProvider());
		renderer.render();*/
		
		ApplicationContext ac=new ClassPathXmlApplicationContext("di.xml");
		MessageRender renderer =(MessageRender)ac.getBean("messageRender");
		renderer.render();
		
	}

	
	
}

 

class HiWorldMessageProvider

package net.slipp.dl;

public class HiWorldMessageProvider  implements MessageProvider{

	@Override
	public String getMessage() {
		String str="Hi";
		return str;
	}
 
}

 

class HelloWorldMessageProvide

package net.slipp.dl;

public class HelloWorldMessageProvider implements MessageProvider {

	@Override
	public String getMessage() {
		String str ="Hello";
		return str;
	}

}

 

 

pom.xml

	<!-- https://mvnrepository.com/artifact/junit/junit -->
		<dependency>
		    <groupId>junit</groupId>
		    <artifactId>junit</artifactId>
		    <version>4.12</version>
		    <scope>test</scope>
		</dependency>


		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-test</artifactId>
			<version>4.0.5.RELEASE</version>
		</dependency>

 

 

class MessageRendererTest

package net.slipp.dl;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

 
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:/di.xml")
public class MessageRendererTest {
	
	@Autowired
	private MessageRender messageRender;
	
	@Test
	public void test(){
		messageRender.render();
	}
	
	
	

	
}

 

 

di.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:p="http://www.springframework.org/schema/p"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">

	<bean id="messageProvider" class="net.slipp.dl.HelloWorldMessageProvider" />

	<bean id="messageRender" class="net.slipp.dl.MessageRender" >
		<property name="messageProvider" ref="messageProvider"></property>
	</bean>

</beans>

 

 

이클립스 템플릿 설정

 

    ${:import(org.junit.Test,org.junit.runner.RunWith,org.springframework.test.context.ContextConfiguration,
            org.springframework.test.context.junit4.SpringJUnit4ClassRunner)} 
    @RunWith(SpringJUnit4ClassRunner.class)
    @ContextConfiguration("classpath:/${cursor}")