springboot

springboot

2024. 2. 28. 22:03ㆍDaily Codig Reminder

springProfile

<!-- root 로거 기본 설정 -->
	<springProfile name="prod">
	<root level="trace">
		<appender-ref ref="STDOUT" />
		<appender-ref ref="DAILYOUT" />
	</root>
	</springProfile>
	
	<springProfile name="dev">
	<root level="info">
		<appender-ref ref="STDOUT" />
		<appender-ref ref="DAILYOUT" />
	</root>
	</springProfile>

application.properties

설정값에 따라 log 가 다르게 나옴

spring.profiles.active=prod
#spring-profiles.active=dev

banner

	public static void main(String[] args) {
		//SpringApplication.run(Boot03Banner01NobannerApplication.class, args);
	SpringApplication app = new SpringApplication(Boot03Banner01NobannerApplication.class);
	app.setBannerMode(Banner.Mode.OFF); //배너 끄기	
	app.run(args);//boot app 실행
	}

한글설정

spring.banner.location=banner.txt
spring.banner.charset=utf-8

빈등록01다른패키지_명시적등록

main

package com.example;

import java.util.List;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.Import;

import com.config.JavaConfig;
import com.service.DBService;


@SpringBootApplication
@Import(value=JavaConfig.class) //import , 자동자동실핼, 자동 빈등록
public class Boot04Application {

	public static void main(String[] args) {
		
		ApplicationContext ctx = SpringApplication.run(Boot04Application.class, args);
		//SpringApplication.run(Boot04Application.class, args);
		//DBService service = new DBService();
		//System.out.println(service);
		
		DBService service = ctx.getBean("myService", DBService.class);
		List<String> list= service.getList();
		System.out.println(list);
	}

}

service

package com.service;

import java.util.Arrays;
import java.util.List;

public class DBService {

	public DBService() {
		super();
		System.out.println("service 기본생성자");
	}
	public List<String> getList(){
		return Arrays.asList("홍길동", "이순신");
	}

}

config

@Configuration //configurstion.xml과 동일 필수!!
public class JavaConfig {
	
@Bean("myService") //IDMyService
public DBService service() {
	return new DBService();
}
//<bean id="myService" class = "com.service.DBService"/>
}

결과

[2m2024-02-22 10:46:16.844[0;39m [32m INFO[0;39m [35m13792[0;39m [2m---[0;39m [2m[           main][0;39m [36mcom.example.Boot04Application           [0;39m [2m:[0;39m Starting Boot04Application using Java 11.0.19 on DESKTOP-SRR9CTJ with PID 13792 (C:\eclipse\stsboot4_stu\workspace\boot04빈등록01다른패키지_명시적등록\target\classes started by acorn in C:\eclipse\stsboot4_stu\workspace\boot04빈등록01다른패키지_명시적등록)
[2m2024-02-22 10:46:16.846[0;39m [32m INFO[0;39m [35m13792[0;39m [2m---[0;39m [2m[           main][0;39m [36mcom.example.Boot04Application           [0;39m [2m:[0;39m No active profile set, falling back to 1 default profile: "default"
service 기본생성자
[2m2024-02-22 10:46:17.172[0;39m [32m INFO[0;39m [35m13792[0;39m [2m---[0;39m [2m[           main][0;39m [36mcom.example.Boot04Application           [0;39m [2m:[0;39m Started Boot04Application in 0.54 seconds (JVM running for 0.946)
[홍길동, 이순신]

빈등록01다른패키지2_scan

@SpringBootApplication
@ComponentScan("com.*")
public class Boot04Application {

	public static void main(String[] args) {
		ApplicationContext ctx = SpringApplication.run(Boot04Application.class, args);
		DBService service = ctx.getBean("myService", DBService.class);
		List<String> list= service.getList();
		System.out.println(list);
	}

@Service("myService")
public class DBService {

	public List<String> getList(){
		return Arrays.asList("홍길동", "이순신");
	}
}

@SpringBootApplication(scanBasePackages="com.*")
//@ComponentScan("com.*") //패키지가 다른경우 명시적 component-scan 필요
public class Boot04Application {

	public static void main(String[] args) {
		ApplicationContext ctx = SpringApplication.run(Boot04Application.class, args);
		DBService service = ctx.getBean("myService", DBService.class);
		List<String> list= service.getList();
		System.out.println(list);
	}

DI_constructor1_method_call

package com.example.service;

import java.util.List;

import com.example.dao.DBOracleDAO;

public class DBService {
DBOracleDAO dao;

public DBOracleDAO getDao() {
	return dao;
}

public void setDao(DBOracleDAO dao) {
	this.dao = dao;
}



public DBService(DBOracleDAO dao) {
	super();
	System.out.println("dao 생성자 호출");
	this.dao = dao;
}

public List<String> list(){
	return this.dao.list();
}

}

package com.example.dao;

import java.util.Arrays;
import java.util.List;

public class DBOracleDAO {
public List<String> list(){
	return Arrays.asList("홍길동","이순신");
}
}

package com.example.config;

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

import com.example.dao.DBOracleDAO;
import com.example.service.DBService;

@Configuration
public class JAVAConfig {
@Bean
public DBOracleDAO dao() {
	return new DBOracleDAO();
}
@Bean("myService")
public DBService service() {
	return new DBService(dao());
}
}

다른방법

@Configuration
public class JAVAConfig {
@Bean
public DBOracleDAO dao() {
	return new DBOracleDAO();
}
@Bean("myService")
public DBService service(DBOracleDAO xxx) {
	return new DBService(xxx);
}
}

다른방법2

	@Bean
	public DBOracleDAO dao() {
		return new DBOracleDAO();
	}
	@Bean("myService")
	public DBService service() {
		DBOracleDAO dao = new DBOracleDAO();
		DBService service = new DBService();
		service.setDao(dao);
		return service;
	}

다른방법3

	@Bean
	public DBOracleDAO dao() {
		return new DBOracleDAO();
	}
	@Bean("myService")
	public DBService service() { //byType 주입
		DBService service = new DBService();
		service.setDao(dao()); //set 함수이용
		return service;
	}

다른방법4

	@Bean
	public DBOracleDAO dao() {
		return new DBOracleDAO();
	}
	
	@Bean ("myService")
	public DBService service (DBOracleDAO xxx) {
		DBService service = new DBService();
		service.setDao(xxx);
		return service;
	}

다른방법5

@Configuration
public class JavaConfig {
//	@Bean
//	public DBOracleDAO dao() {
//		return new DBOracleDAO();
//	} 
//	
	//두개만들면 가동안됨 
	//DAO @Repository 로 빈생성
	@Bean ("myService")
	public DBService service (DBOracleDAO xxx) {
		DBService service = new DBService();
		service.setDao(xxx);
		return service;
	}
}

parameter

package com.example;

import java.util.List;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.Import;

import com.example.config.JavaConfig;
import com.example.service.DBService;


@SpringBootApplication
@Import(value=JavaConfig.class)
public class Boot04Application {

	public static void main(String[] args) {
		
		ApplicationContext ctx = SpringApplication.run(Boot04Application.class, args);
		DBService service = ctx.getBean("myService", DBService.class);
		List<String> list= service.list();
		System.out.println(list);
	}

}

package com.example.config;

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

import com.example.dao.DBOracleDAO;
import com.example.service.DBService;
@Configuration
public class JavaConfig {
//	@Bean
//	public DBOracleDAO dao() {
//		return new DBOracleDAO();
//	} 
//	
	//두개만들면 가동안됨 
	//DAO @Repository 로 빈생성
	@Bean ("myService")
	public DBService service (DBOracleDAO xxx) {
		DBService service = new DBService();
		service.setDao(xxx);
		return service;
	}
}

package com.example.dao;

import java.util.Arrays;
import java.util.List;

import org.springframework.stereotype.Repository;
@Repository
public class DBOracleDAO {
public List<String> list(){
	return Arrays.asList("홍길동","이순신");
}
}

package com.example.service;

import java.util.List;

import com.example.dao.DBOracleDAO;

public class DBService {
DBOracleDAO dao;

public DBOracleDAO getDao() {
	return dao;
}

public void setDao(DBOracleDAO dao) {
	this.dao = dao;
}



public DBService(DBOracleDAO dao) {
	super();
	System.out.println("dao 생성자 호출");
	this.dao = dao;
}

public DBService() {
	// TODO Auto-generated constructor stub
}

public List<String> list(){
	return this.dao.list();
}



}

setter2_method_parameter3_coc

@SpringBootApplication
@Import(value=JavaConfig.class)
public class Boot05Di2Setter2MethodParameter3CocApplication {

	public static void main(String[] args) {
		ApplicationContext ctx = SpringApplication.run(Boot05Di2Setter2MethodParameter3CocApplication.class, args);
//config import 안했을때
//		DBOracleDAO dao = new DBOracleDAO();
//        dao.setDriver("oracle");
//        DBOracleService service = new DBOracleService(dao);
//        List<String> list =  service.list();
//        String driver = service.getDriver();
//        System.out.println(list);
//        System.out.println(driver);
//import 하면
		DBOracleDAO dao = ctx.getBean("dao", DBOracleDAO.class);
		DBOracleService service = ctx.getBean("myService", DBOracleService.class);
		 dao.setDriver("oracle");
		List<String> list= service.list();
		System.out.println(service.getDriver());
		System.out.println(service.list());
	}

}

package com.example.service;

import java.util.List;

import com.example.dao.DBOracleDAO;

public class DBOracleService {
	DBOracleDAO dao;
	
	public DBOracleDAO getDao() {
		return dao;
	}

	public void setDao(DBOracleDAO dao) {
		this.dao = dao;
	}



	public DBOracleService(DBOracleDAO dao) {
		super();
		System.out.println("dao 생성자 호출");
		this.dao = dao;
	}

	public DBOracleService() {
		// TODO Auto-generated constructor stub
	}

	public List<String> list(){
		return this.dao.list();
	}


	public String getDriver() {
		return this.dao.getDriver();
	}
	}

package com.example.config;

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

import com.example.dao.DBOracleDAO;
import com.example.service.DBOracleService;

@Configuration

public class JavaConfig {


	@Bean
	public DBOracleDAO dao() {
		DBOracleDAO xxx= new DBOracleDAO();
		xxx.setDriver("oracle");
		return xxx;
	}
	@Bean
	public DBOracleDAO dao2() {
		DBOracleDAO xxx= new DBOracleDAO();
		xxx.setDriver("mysql");
		return xxx;
	}
	
	@Bean ("myService")
	public DBOracleService service (DBOracleDAO xxx) {
		DBOracleService service = new DBOracleService();
		service.setDao(xxx);
		return service;
	}
}

public class DBOracleDAO {
public String driver="";

public String getDriver() {
	return driver;
}

public void setDriver(String driver) {
	this.driver = driver;
}

public List<String> list(){
	return Arrays.asList("홍길동","이순신");
}
}

singleton: 한 개의 빈 객체 인스턴스가 컨테이너 내에서 오직 하나만 생성되어 공유되는 스코프를 나타냅니다.

즉, 해당 빈 객체는 애플리케이션의 라이프사이클 동안에 한 번만 생성되고,

이후에는 계속해서 동일한 인스턴스를 사용합니다.

prototype: prototype 스코프를 가진 빈은 요청할 때마다 매번 새로운 인스턴스가 생성됩니다.

각각의 요청에 대해 별도의 빈 인스턴스가 생성되어 반환되기 때문에,

이 빈은 싱글톤과는 달리 여러 인스턴스를 가질 수 있습니다.

@Configuration
public class JavaConfig {

	@Bean
//	@Scope("singleton")
	@Scope("prototype")
	public DBOracleDAO dao() {
		return new DBOracleDAO();
	}
	
	@Bean("myService1") //// default Singletone
	public DBOracleService service() { // by type
		DBOracleService service = new  DBOracleService(dao());
		return service;
	}
	// main에서 service getBean 2번 주소 두개 다 출력
	@Bean("myService2")
	public DBOracleService service2(DBOracleDAO XXX) {
		DBOracleService service = new  DBOracleService(dao());
		return service;
	}
}

list

@SpringBootApplication
public class Boot05Di4CollectionListApplication {

	public static void main(String[] args) {
		ApplicationContext ctx = SpringApplication.run(Boot05Di4CollectionListApplication.class, args);
		DBService service = ctx.getBean("myService", DBService.class);
		 List<DBDao> list= service.getList();
//		List<DBDao> list = new ArrayList<>();
//		list.add(new DBOracleDAO());
//		list.add(new DBMYSQLDAO());
//		DBService service = new DBService(list);
//		List<DBDao> list2= service.getList();
		System.out.println(list.size());
		for (DBDao dao : list) {
			List<String> data = dao.list();
			System.out.println(data);
			}
	
		//System.out.println(dao);
		//System.out.println(service);
    }
}

@Configuration
public class JavaConfig {

	@Bean
	public DBOracleDAO dao() {
		return new DBOracleDAO();
	}
	@Bean
	public DBMYSQLDAO dao2() {
		return new DBMYSQLDAO();
	}
	
	@Bean("myService") //// default Singletone
	public DBService service(List<DBDao> list) { // by type
		return new DBService(list);
	}

}

public interface DBDao {
public  List<String> list(); //추상함수
}

public class DBMYSQLDAO implements DBDao {

	@Override
	public List<String> list() {
		// TODO Auto-generated method stub
		return Arrays.asList("mysql 홍길동2", "mysql 이순신2");
	}

}

public class DBOracleDAO implements DBDao {

	@Override
	public List<String> list() {
		// TODO Auto-generated method stub
		return Arrays.asList("oracle 홍길동", "oracle 이순신");
	}

}

public class DBService {
  List<DBDao> list; // 변수의 접근 제어자를 private로 변경

  
public DBService(List<DBDao> list) {
	super();
	this.list = list;
}

public DBService() {
	// TODO Auto-generated constructor stub
}

public List<DBDao> getList() {
	return list;
}

public void setList(List<DBDao> list) {
	this.list = list;
}

  
}

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