스프링 구조를 이해하는 예제6(스프링의 annotation)

ResultMain.java

package com.test6;

import org.springframework.context.support.AbstractApplicationContext;

import org.springframework.context.support.ClassPathXmlApplicationContext;

public class ResultMain {

public static void main(String[] args){

AbstractApplicationContext context=new ClassPathXmlApplicationContext("com/test6/applicationContext.xml");

UserService service=(UserService)context.getBean("test6.userServic"); // bean id를 명시해줌

System.out.println(service.getUserData());

}

}

================================================================================================================================================

UserImpl.java

package com.test6;

import javax.annotation.PostConstruct;

import javax.annotation.PreDestroy;

import org.springframework.stereotype.Component;

@Component("user")    // <context:component-scan> 태그를 설정파일에 추가하면 해당 어노테이션이 적용된 클래스를 빈으로 등록하게 된다.

public class UserImpl implements User{

private String name;

private int age;

private String tel;

public String getName() {

return name;

}

@PostConstruct    // 생성자를 부른 후에 값들을 초기화를 시킨다.

public void init(){

name="이이";

tel="010";

age=20;

System.out.println("초기화......@PostConstruct");

}

@PreDestroy

public void close(){

System.out.println("종료처리......@PostConstruct");

}

//@Required

public void setName(String name) {

this.name = name;

}

public int getAge() {

return age;

}

public void setAge(int age) {

this.age = age;

}

public String getTel() {

return tel;

}

public void setTel(String tel) {

this.tel = tel;

}

@Override

public String result() {

String s=name+"님 나이는 "+age+"이고 전화는 "+tel;

return s;

}

}

================================================================================================================================================

UserService.java

package com.test6;

import javax.annotation.Resource;

import org.springframework.stereotype.Component;

@Component("test6.userServic")

public class UserService {

// @Autowired// 셋터 필요없음, byType(test4 xml 참조)

// @Qualifier("user2")// 동일한 bean에서 어떤것을 사용할지 명시해줌(id로)

@Resource(name="user")//요놈은 자바꺼임, 스프링꺼 아님 //(@Autowired와 @Qualifier 합쳐논것), byName

private User user;

// public void setUser(User user){

// this.user=user;

// }

public String getUserData(){

return user.result();

}

}

================================================================================================================================================

applicationContext.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:aop="http://www.springframework.org/schema/aop"

xmlns:context="http://www.springframework.org/schema/context"

xmlns:p="http://www.springframework.org/schema/p"

xmlns:util="http://www.springframework.org/schema/util"

xmlns:task="http://www.springframework.org/schema/task"

xsi:schemaLocation="

   http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd

http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.2.xsd

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

http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.2.xsd

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

<!-- <context:annotation-config/> -->

<context:component-scan base-package="com.test6"/>

<!-- 요놈이 곧 bean 태그임, bean id를 만들때 class이름으로 만든다. 앞글자만 소문자로 바꿔서. 단, 어노테이션에 클래스이름을 따로 명시할 수 있다. -->

<!-- <bean id="user1" class="com.test6.UserImpl"> -->

<!-- <property name="name" value="연습용"/> -->

<!-- <property name="age" value="123"/> -->

<!-- </bean> -->

<!-- <bean id="user2" class="com.test6.UserImpl"> -->

<!-- <property name="name" value="ㅋㅋ"/> -->

<!-- <property name="age" value="10"/> -->

<!-- <property name="tel" value="0101010-0011"/> -->

<!-- </bean> -->

<!-- <bean id="userService" class="com.test6.UserService" />  대신 <context:component-scan base-package="com.test6"/> 라고 명시함-->

</beans> 

======================================================================================================================================================

user.properties

name=\uBC14\uBCF4\uB2D8

age=20

tel=010-2222-2222

======================================================================================================================================================

ResultMain.java를 실행시킨 결과

초기화......@PostConstruct

이이님 나이는 20이고 전화는 010