스프링 컨테이너 생명 주기

GenericXmlApplication ctx = newGenericXmlApplicationContect();  ----------> 스프링컨테이너생성

ctx.load("classpath.applicationCTX.xml");  ----> 스프링 컨테이너 설정 load를 해서 xml파일을 가져오는경우 반드시 refresh필요

ctx.refresh();

Student student =ctx.getbean("student", Student.class);  ----------> 스프링컨테이너사용

System.out.println("이름" + student.getName);

ctx.close(); 종료

---

스프링 생명 주기

package com.javalec.ex;

import org.springframework.beans.factory.DisposableBean;

import org.springframework.beans.factory.InitializingBean;

public class Student implements InitializingBean, DisposableBean{

                                              초기화할때, 빈소멸과정에서 오버라이딩에 의해 빈생성

private String name;

private int age;

public Student(String name, int age) {

this.name = name;

this.age = age;

}

public String getName() {

return name;

}

public int getAge() {

return age;

}

@Override

public void afterPropertiesSet() throws Exception {  ///초기화될때 afferPropertiesSet이라는 메소드가 생성

// TODO Auto-generated method stub

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

}

@Override

public void destroy() throws Exception {   ///빈소멸될때 afferPropertiesSet이라는 메소드가 생성

// TODO Auto-generated method stub

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

}

}

---

어노테이션 방식

package com.javalec.ex;

import javax.annotation.*;

public class OtherStudent  {

private String name;

private int age;

public OtherStudent(String name, int age) {

this.name = name;

this.age = age;

}

public String getName() {

return name;

}

public int getAge() {

return age;

}

@PostConstruct

public void initMethod() {

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

}

@PreDestroy

public void destroyMethod() {

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

}

}

---

package com.javalec.ex;

import org.springframework.context.support.AbstractApplicationContext;

import org.springframework.context.support.GenericXmlApplicationContext;

public class MainClass {

public static void main(String[] args) {

AbstractApplicationContext ctx = new GenericXmlApplicationContext("classpath:applicationCTX.xml");

Student student1 = ctx.getBean("student", Student.class);

System.out.println("이름 : " + student1.getName());

System.out.println("나이 : " + student1.getAge());

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

Student student2 = ctx.getBean("student", Student.class); //student1과 student2의 객체는 같다. 

student2.setName("홀길자"); //홀길자로 변경

student2.setAge(100); //나이변경

System.out.println("이름 : " + student1.getName());

System.out.println("나이 : " + student1.getAge());

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

if(student1.equals(student2)) {

System.out.println("student1 == student2");

} else {

System.out.println("student1 != student2");

}

ctx.close();

}

}

package com.javalec.ex;

public class Student {

private String name;

private int age;

public Student(String name, int age) {

this.name = name;

this.age = age;

}

public String getName() {

return name;

}

public int getAge() {

return age;

}

public void setName(String name) {

this.name = name;

}

public void setAge(int age) {

this.age = age;

}

}

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

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

<bean id="student" class="com.javalec.ex.Student" scope="singleton">

<constructor-arg value="홍길순"></constructor-arg>

<constructor-arg value="30"></constructor-arg>

</bean>

</beans>