[Spring] 실습 3일차_Injection_Callback

실습 3일차_Injection_Callback

 

https://docs.spring.io/spring-framework/docs/4.3.0.RELEASE/spring-framework-reference/html/beans.html#beans-collection-elements

 

 Spring Injection_Callback

ExampleMain.java

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

public class ExampleMain {

	public static void main(String[] args) {
	
		// IoC Container
		
		//ApplicationContext ctx =
		GenericXmlApplicationContext ctx =
				new GenericXmlApplicationContext("classpath:com/config/conf.xml");
		
		ctx.close();
	}

}

ExampleBean.java

package examples;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class ExampleBean {
	
	private static final Logger logger = LoggerFactory.getLogger(ExampleBean.class);

	String mesg; // null 
	
	public ExampleBean() {
		logger.info("ExampleBean 생성자 호출");
	}

	// setter 메서드 주입 ==> xml에서는 <property name = "mesg"
	public void setMesg(String mesg) {
		logger.info("setMesg 메서드 호출");
		this.mesg = mesg;
	}
	
	public String getMesg() {
		return mesg;
	}
	
	// init-method에서 호출
	public void init() {
		logger.info("init 메서드 호출");
	}
	
	// destroy-method에서 호출
	public void cleanup() {
		logger.info("cleanup 메서드 호출");
	}
	
}

conf.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"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
	
	<bean id="exampleInitBean" class="examples.ExampleBean" init-method="init" destroy-method="cleanup">
		<property name="mesg" value="helloworld" />
	</bean>
	
</beans>

* 출력 화면 

 

 Spring Injection_Callback

ExampleMain.java

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

public class ExampleMain {
	public static void main(String[] args) {
	
		// IoC Container
		
		//ApplicationContext ctx =
		GenericXmlApplicationContext ctx =
				new GenericXmlApplicationContext("classpath:com/config/conf.xml");
		
		ctx.close();
	}
}

ExampleBean.java

package examples;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.DisposableBean;
import org.springframework.beans.factory.InitializingBean;

public class ExampleBean implements InitializingBean, DisposableBean{
	
	private static final Logger logger = LoggerFactory.getLogger(ExampleBean.class);

	String mesg; // null 
	
	public ExampleBean() {
		logger.info("ExampleBean 생성자 호출");
	}

	// setter 메서드 주입 ==> xml에서는 <property name = "mesg"
	public void setMesg(String mesg) {
		logger.info("setMesg 메서드 호출");
		this.mesg = mesg;
	}
	
	public String getMesg() {
		return mesg;
	}
	
	// init-method에서 호출
	public void init() {
		logger.info("init 메서드 호출");
	}
	
	// destroy-method에서 호출
	public void cleanup() {
		logger.info("cleanup 메서드 호출");
	}

	@Override
	public void afterPropertiesSet() throws Exception {
		logger.info("afterPropertiesSet 메서드 호출");
		
	}

	@Override
	public void destroy() throws Exception {
		logger.info("destroy 메서드 호출");
	}
	
}

conf.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"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
	
	<bean id="exampleInitBean" class="examples.ExampleBean">
		<property name="mesg" value="helloworld" />
	</bean>
	
</beans>

* 출력 화면 

 

 Spring Injection_Callback

ExampleMain.java

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

public class ExampleMain {
	public static void main(String[] args) {
	
		// IoC Container
		
		//ApplicationContext ctx =
		GenericXmlApplicationContext ctx =
				new GenericXmlApplicationContext("classpath:com/config/conf.xml");
		
		ctx.close();
	}
}

ExampleBean.java

package examples;
import javax.annotation.PostConstruct;
import javax.annotation.PreDestroy;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.DisposableBean;
import org.springframework.beans.factory.InitializingBean;

public class ExampleBean {
	
	private static final Logger logger = LoggerFactory.getLogger(ExampleBean.class);

	String mesg; // null 
	
	public ExampleBean() {
		logger.info("ExampleBean 생성자 호출");
	}

	// setter 메서드 주입 ==> xml에서는 <property name = "mesg"
	public void setMesg(String mesg) {
		logger.info("setMesg 메서드 호출");
		this.mesg = mesg;
	}
	
	public String getMesg() {
		return mesg;
	}
	
	@PostConstruct
    public void populateMovieCache() {
        logger.info("@PostConstruct 메서드 호출");
    }

    @PreDestroy
    public void clearMovieCache() {
    	logger.info("@PreDestroy 메서드 호출");
    }
}

conf.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-4.3.xsd">
	
	<!-- @ 어노테이션 활성화 -->
	<context:annotation-config />
	
	<bean id="exampleInitBean" class="examples.ExampleBean">
		<property name="mesg" value="helloworld" />
	</bean>
	
</beans>

* 출력 화면 

 

 출처

 

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