6.Spring DI_1

Spring Framework
Spring DI
(Dependency Injection_1)

Spring Framework_Spring Ioc & DI
Spring IoC & DI
5. Spring DI
1) 세터 주입 _ XML 기반
 세터 주입은 클래스 사이의 의존관계를 연결시키기 위해 setter 메소드를 이용하는 방법이다.
package edu.ojc.setter1;
interface Emp {
public abstract void gotoOffice();
public abstract void getoffWork();
}
[Emp.java]

class Programmer implements Emp {
public void gotoOffice() {
System.out.println("프로그래머출근합니다.");
}
public void getoffWork() {
System.out.println("프로그래머퇴근합니다.");
}
}
[Programmer.java]
class Designer implements Emp {
System.out.println("디자이너출근합니다.");
}
System.out.println("디자이너퇴근합니다.");
}
}
[Designer.java]

public class Develope {
Emp emp;
public void setEmp(Emp emp) {
this.emp = emp;
}
void coding() {
emp.gotoOffice();
System.out.println("개발합니다...");
emp.getoffWork();
}
}
[Develop.java]

<?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="programmer" class="edu.ojc.setter1.Programmer" />
<bean id="designer" class="edu.ojc.setter1.Designer" />
<bean id="develope" class="edu.ojc.setter1.Develope"p:emp-ref="programmer"/>

</beans>
[Src/main/resources/ojc1.xml]

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class TestMain {
public static void main(String[] args) {
ApplicationContext context =new ClassPathXmlApplicationContext("ojc1.xml");
Develope dev = (Develop)context.getBean("develope");
dev.coding();
}
}
[TestMain.java]

2) 세터 주입 _ 어노테이션 기반
interface Emp {
}
[Emp.java]
import org.springframework.stereotype.Service;
@Service
}
}
}
[Programmer.java]

@Service
}
}
}
[Designer.java]

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
@Service
Emp emp;
@Autowired
@Qualifier("programmer")
public void setEmp(Emp emp) {
this.emp = emp;
}
void coding() {
emp.gotoOffice();
emp.getoffWork();
}
}
[Develop.java]

xmlns:context="http://www.springframework.org/schema/context"
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.setter2"/>
</beans>
dev.coding();
}
}
[TestMain.java]

3) 생성자 주입 _ XML 기반
package edu.ojc.constructor1;
interface Emp {
}
[Emp.java]
class Programmer implements Emp{
}
}
}
[Programmer.java]

}
}
}
[Designer.java]

Emp emp;
public Develope(Emp emp) {
this.emp = emp;
}
void coding() {
emp.gotoOffice();
emp.getoffWork();
}
}
[Develop.java]

xmlns:c="http://www.springframework.org/schema/c"
http://www.springframework.org/schema/beans/spring-beans.xsd">
<bean id="programmer" class="edu.ojc.constructor1.Programmer" />
<bean id="designer" class="edu.ojc.constructor1.Designer" />
<bean id="develope" class="edu.ojc.constructor1.Develope" c:emp-ref="programmer" />

</beans>

Develope dev = (Develope)context.getBean("develope");
dev.coding();
}
}
[TestMain.java]

4) 생성자 주입 _ 어노테이션 기반
interface Emp {
}
[Emp.java]
@Service
}
}
}
[Programmer.java]

@Service
}
}
}
[Designer.java]

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
@Service
Emp emp;
@Autowired
public Develope(@Qualifier(value="programmer")Emp emp) {
this.emp = emp;
}
void coding() {
emp.gotoOffice();
emp.getoffWork();
}
}
[Develop.java]

xmlns:context=http://www.springframework.org/schema/context
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>
dev.coding();
}
}
[TestMain.java]

6.Spring DI_1

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