Spring 설정 파일의 변화

1. Spring XML Setter 주입

- SpringConfigHistroyApplication.java 파일

package com.psjw.springConfigHistroy;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import java.util.Arrays;

//@SpringBootApplication
public class SpringConfigHistroyApplication {

	public static void main(String[] args) {

		ApplicationContext context=new ClassPathXmlApplicationContext("application-context.xml");
		String[] beanDefinitionNames = context.getBeanDefinitionNames();
		System.out.println(Arrays.toString(beanDefinitionNames));
		Object obj= context.getBean("xmlBeanService");
		System.out.println(obj instanceof  XmlBeanService);
		XmlBeanService xmlBeanService=(XmlBeanService)obj;
		System.out.println(xmlBeanService.toString());
		System.out.println(xmlBeanService.xmlBeanRepo);
		//SpringApplication.run(SpringConfigHistroyApplication.class, args);
	}

}

- XmlBeanRepository.java 파일

package com.psjw.springConfigHistroy;

public class XmlBeanRespository {
}

- XmlBeanService.java 파일

package com.psjw.springConfigHistroy;

public class XmlBeanService {

    XmlBeanRespository xmlBeanRepo;


    public void setXmlBeanRepo(XmlBeanRespository xmlBeanRepo) {
        this.xmlBeanRepo = xmlBeanRepo;
    }
}

- application-context.xml 파일

<?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"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       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-4.0.xsd
        http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">
    <!--xmlBeanRepo : BookService의 변수명 -->
    <!--xmlBeanRepository : 하단에 설정된 bean의 name을 참조 -->
    <bean name="xmlBeanService" class="com.psjw.springConfigHistroy.XmlBeanService">
        <property name="xmlBeanRepo" ref="xmlBeanRepository"/>
    </bean>
    <bean name="xmlBeanRepository" class="com.psjw.springConfigHistroy.XmlBeanRespository"/>
</beans>

- 실행 결과

xml에 <bean>에 설정한 xmlBeanService와 xmlBeanRepository가 조회되며 obj는 XmlBeanService객체와 같은 타입

2. Spring xml Contructor 주입

- SpringConfigHistroyApplication.java 파일

package com.psjw.springConfigHistroy;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import java.util.Arrays;

//@SpringBootApplication
public class SpringConfigHistroyApplication {

	public static void main(String[] args) {

		ApplicationContext context=new ClassPathXmlApplicationContext("application-context.xml");
		String[] beanDefinitionNames = context.getBeanDefinitionNames();
		System.out.println(Arrays.toString(beanDefinitionNames));
		Object obj= context.getBean("xmlBeanService");
		System.out.println(obj instanceof  XmlBeanService);
		XmlBeanService xmlBeanService=(XmlBeanService)obj;
		System.out.println(xmlBeanService.toString());
		System.out.println(xmlBeanService.xmlBeanRepo);
		//SpringApplication.run(SpringConfigHistroyApplication.class, args);
	}

}

- XmlBeanRepository.java 파일

package com.psjw.springConfigHistroy;

public class XmlBeanRespository {
}

- XmlBeanService.java 파일

package com.psjw.springConfigHistroy;

public class XmlBeanService {

    XmlBeanRespository xmlBeanRepo;

    public XmlBeanService(XmlBeanRespository xmlBeanRepo) {
        this.xmlBeanRepo = xmlBeanRepo;
    }

}

- application-context.xml 파일

<?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"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       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-4.0.xsd
        http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">
<bean name="xmlBeanService" class="com.psjw.springConfigHistroy.XmlBeanService">
    <constructor-arg ref="xmlBeanRepository"/>
</bean>
<bean name="xmlBeanRepository" class="com.psjw.springConfigHistroy.XmlBeanRespository"/>
</beans>

- 실행결과

3. Spring XML ComponentScan

- SpringConfigHistroyApplication.java 파일

package com.psjw.springConfigHistroy;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import java.util.Arrays;

//@SpringBootApplication
public class SpringConfigHistroyApplication {

	public static void main(String[] args) {

		ApplicationContext context=new ClassPathXmlApplicationContext("application-context.xml");
		String[] beanDefinitionNames = context.getBeanDefinitionNames();
		System.out.println(Arrays.toString(beanDefinitionNames));
		Object obj= context.getBean("xmlBeanService");
		System.out.println(obj instanceof  XmlBeanService);
		XmlBeanService xmlBeanService=(XmlBeanService)obj;
		System.out.println(xmlBeanService.toString());
		System.out.println(xmlBeanService.xmlBeanRepo);
		//SpringApplication.run(SpringConfigHistroyApplication.class, args);
	}

}

- XmlComponentScanRepository.java 파일

package com.psjw.springConfigHistroy;

import org.springframework.stereotype.Component;
import org.springframework.stereotype.Repository;

@Component //or @Repository
public class XmlComponentScanRepository {
}

- XmlComponentScanService.java 파일

package com.psjw.springConfigHistroy;


import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Service;

@Component //or @Service  //Bean등록
public class XmlComponentScanService {
    @Autowired
    public XmlComponentScanRepository xmlComponentScanRepository;


}

- application-context.xml 파일

<?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"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       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-4.0.xsd
        http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">
<bean name="xmlBeanService" class="com.psjw.springConfigHistroy.XmlBeanService">
    <constructor-arg ref="xmlBeanRepository"/>
</bean>
<bean name="xmlBeanRepository" class="com.psjw.springConfigHistroy.XmlBeanRespository"/>
</beans>

- 결과

4. Spring Java Bean 등록

- SpringConfigHistroyApplication.java 파일

package com.psjw.springConfigHistroy;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import java.util.Arrays;

//@SpringBootApplication
public class SpringConfigHistroyApplication {

	public static void main(String[] args) {

		ApplicationContext context=new AnnotationConfigApplicationContext(ApplicationConfig.class);
		String[] beanDefinitionNames = context.getBeanDefinitionNames();
		System.out.println(Arrays.toString(beanDefinitionNames));
		Object obj=context.getBean("javaBeanService");
		System.out.println(obj instanceof  JavaBeanService);

		JavaBeanService javaBeanService= (JavaBeanService) obj;
		System.out.println(javaBeanService.toString());
		//SpringApplication.run(SpringConfigHistroyApplication.class, args);
	}

}

- JavaBeanRepository.java 파일

package com.psjw.springConfigHistroy;

public class JavaBeanRepository {
}

- JavaBeanService.java 파일

package com.psjw.springConfigHistroy;

public class JavaBeanService {
    JavaBeanRepository javaBeanRepository;
}

- ApplicationConfig.java 파일

package com.psjw.springConfigHistroy;


import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class ApplicationConfig {
    @Bean
    public JavaBeanRepository javaBeanRepository(){
        return new JavaBeanRepository();
    }

    @Bean JavaBeanService javaBeanService(){
        return new JavaBeanService();
    }
}

- 결과

5. Spring Java ComponentScan

- SpringConfigHistroyApplication.java 파일

package com.psjw.springConfigHistroy;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import java.util.Arrays;

//@SpringBootApplication
public class SpringConfigHistroyApplication {

	public static void main(String[] args) {

		ApplicationContext context=new AnnotationConfigApplicationContext(ApplicationConfig.class);
		String[] beanDefinitionNames = context.getBeanDefinitionNames();
		System.out.println(Arrays.toString(beanDefinitionNames));
		Object obj=context.getBean("javaBeanService");
		System.out.println(obj instanceof  JavaBeanService);

		JavaBeanService javaBeanService= (JavaBeanService) obj;
		System.out.println(javaBeanService.toString());
		System.out.println(javaBeanService.javaBeanRepository);
		//SpringApplication.run(SpringConfigHistroyApplication.class, args);
	}

}

- JavaBeanRepository.java 파일

package com.psjw.springConfigHistroy;

import org.springframework.stereotype.Component;
import org.springframework.stereotype.Repository;

@Repository //@Component 둘다 가능 빈등록
public class JavaBeanRepository {
}

- JavaBeanService.java 파일

package com.psjw.springConfigHistroy;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Service;

@Service //@Component 둘다 가능 빈등록
public class JavaBeanService {
    @Autowired
    JavaBeanRepository javaBeanRepository;

}

- ApplicationConfig.java 파일

package com.psjw.springConfigHistroy;


import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.ComponentScans;
import org.springframework.context.annotation.Configuration;

@Configuration
//@ComponentScan(basePackages = "com.psjw.springConfigHistroy") basePackage는 package를 직접 설정한 곳부터 하위패키지 스캔
@ComponentScan(basePackageClasses = SpringConfigHistroyApplication.class) //SpringConfigHistoryApplication class 위치한 곳 부터 하위패키지 스캔
public class ApplicationConfig {
}

- 결과

6. Spring Boot @SpringBootApplication

- ApplicationContextProvider.java 파일 ( ApplicationContext를 불러오기 위해 생성)

package com.psjw.springConfigHistroy;

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;

@Component
public class ApplicationContextProvider implements ApplicationContextAware {

    private static ApplicationContext applicationContext;

    @Override
    public void setApplicationContext(ApplicationContext ctx) throws BeansException {
        applicationContext = ctx;
    }

    public static ApplicationContext getApplicationContext() {
        return applicationContext;
    }

}

- SpringConfigHistroyApplication.java 파일

package com.psjw.springConfigHistroy;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import java.util.Arrays;

@SpringBootApplication
public class SpringConfigHistroyApplication {


	public static void main(String[] args) {
		SpringApplication.run(SpringConfigHistroyApplication.class, args);
		ApplicationContext context=ApplicationContextProvider.getApplicationContext();

		String[] beanDefinitionNames = context.getBeanDefinitionNames();
		System.out.println(Arrays.toString(beanDefinitionNames));
		Object obj=context.getBean("javaBeanService");
		System.out.println(obj instanceof  JavaBeanService);

		JavaBeanService javaBeanService= (JavaBeanService) obj;
		System.out.println(javaBeanService.toString());
		System.out.println(javaBeanService.javaBeanRepository);

	}

}

- JavaBeanRepository.java 파일

package com.psjw.springConfigHistroy;

import org.springframework.stereotype.Component;
import org.springframework.stereotype.Repository;

@Repository //@Component 둘다 가능 빈등록
public class JavaBeanRepository {
}

- JavaBeanService.java 파일

package com.psjw.springConfigHistroy;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Service;

@Service //@Component 둘다 가능 빈등록
public class JavaBeanService {
    @Autowired
    JavaBeanRepository javaBeanRepository;

}

- 결과

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공부합시다~

Spring 설정 파일의 변화

1. Spring XML Setter 주입

2. Spring xml Contructor 주입

3. Spring XML ComponentScan

4. Spring Java Bean 등록

5. Spring Java ComponentScan

6. Spring Boot @SpringBootApplication

'Spring' 카테고리의 다른 글

티스토리툴바

Spring 설정 파일의 변화

1. Spring XML Setter 주입

2. Spring xml Contructor 주입

3. Spring XML ComponentScan

4. Spring Java Bean 등록

5. Spring Java ComponentScan

6. Spring Boot @SpringBootApplication

'Spring' 카테고리의 다른 글

'Spring' Related Articles

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