[자바교육,스프링교육(Spring Framework/Boot)추천_탑크리에듀]#13.스프링DI(생성자주입,어노테이션기반예제)

#13.스프링DI(생성자주입,어노테이션기반예제)

생성자 주입(Constructor  Injection) – 어노테이션 기반

[Emp.java]

package edu.ojc.constructor2;

interface Emp {

 public abstract void gotoOffice();

 public abstract void getoffWork();

}

[Programmer.java]

package edu.ojc.constructor2;

 import org.springframework.stereotype.Service;

@Service

class Programmer implements Emp {

public void gotoOffice() {

           System.out.println("프로그래머 출근 합니다.");

}

public void  getoffWork() {

           System.out.println("프로그래머 퇴근 합니다.");

}

}

[Designer.java]

package edu.ojc.constructor2;

import org.springframework.stereotype.Service;

@Service

class Designer implements Emp {

public void gotoOffice() {

           System.out.println("디자이너 출근 합니다.");

}

public void  getoffWork() {

           System.out.println("디자이너 퇴근 합니다.");

}

}

[Develop.java]

package edu.ojc.constructor2;

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

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

import org.springframework.stereotype.Service;

@Service

public class Develope {

           Emp emp;

           @Autowired

           public Develope(@Qualifier(value="programmer") Emp emp) {

                     this.emp = emp;

           }

           void coding() {

           emp.gotoOffice();

                     System.out.println("개발합니다...");

                     emp.getoffWork();

           }

}

[Src/main/resources/ojc4.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-4.2.xsd">

           <context:component-scan base-package="edu.ojc.constructor2"/>

</beans>

[TestMain.java]

package edu.ojc.constructor2;

import org.springframework.context.ApplicationContext;

import org.springframework.context.support.ClassPathXmlApplicationContext;

public class TestMain {

public static void main(String[] args) {

     ApplicationContext context = new ClassPathXmlApplicationContext("ojc4.xml");

      Develope dev = (Develop)context.getBean("develope");

      dev.coding();

}

}