https://blog.jiniworld.me/81

스프링에서 API Key 또는 비밀스러운 정보를 따로 관리해야 할 때(에를 들어 public git 시스템에 푸쉬), 역할에 따른 설정파일이 필요할 때는 application.yml 이외의 설정파일을 추가해야합니다.

이 떄, 스프링 부트에서 설정파일을 나누는 방법으로, 별도의 설정 없이 ***.yml파일 추가 후, 아래 코드와 같이 실행파일의 경로를 등록해주면 됩니다.

https://dlibs.tistory.com/18

@SpringBootApplication@EnableGlobalMethodSecurity(securedEnabled = true)
public class JclipProtoApplication {
//static {
//    System.setProperty("spring.config.location", "classpath:/application.yml,classpath:/demo.yml");
 // }

	private static final String APPLICATION=
											"spring.config.location="+
											"classpath:/application.yml,"+
											"classpath:/private.yml";

	public static void main(String[] args) {
		new SpringApplicationBuilder(JclipProtoApplication.class).properties(APPLICATION).run(args);
		
//		SpringApplication.run(JclipProtoApplication.class, args);}

++ 주의 ★★

참고로, maven test 기능을 이용할 경우에는, @SpringBootTest 에도 프로퍼티 설정을 추가해줘야합니다.

추가하지 않을 경우에는 메이븐 테스트 시 demo.yml 프로퍼티를 읽어들이지 못하여 아래와 같은 BUILD FAILURE이 발생됩니다.

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'openAPI' defined in class path resource [me/jiniworld/demo/configs/OpenApiConfig.class]:
Unexpected exception during bean creation; nested exception is java.lang.IllegalArgumentException:
Could not resolve placeholder 'demo.version' in value "${demo.version}"

[INFO] Results:
[INFO]
[ERROR] Errors:
[ERROR]   DemoApplicationTests.contextLoads » IllegalState Failed to load ApplicationCon...
[INFO]
[ERROR] Tests run: 1, Failures: 0, Errors: 1, Skipped: 0
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  57.176 s
[INFO] Finished at: 2020-08-15T20:39:54+09:00
[INFO] ------------------------------------------------------------------------

@RunWith(SpringRunner.class)
@SpringBootTest
public class DemoApplicationTests {

  static {
    System.setProperty("spring.config.location", "classpath:/application.yml,classpath:/demo.yml");
  }
  ...
}

출처: https://blog.jiniworld.me/81

private static final String PROPERTIES =
        "spring.config.location="
        +"classpath:/application.yml"
        +",classpath:/google.yml"
        +",classpath:/mail.yml";

public static void main(String[] args) {
    new SpringApplicationBuilder(RecruitJogbo.class)
            .properties(PROPERTIES)
            .run(args);
}

아래방법이 가장 간편한 듯.

ftp:
  port: 2121
  uploadDir: C:\\kangminkyu\\FTPfileUpload
  userlist: 
    - kang/1234
    - min/1234
    - kyu/1234
#  api:   #요건 내부 클래스로
#    name: kakao
#    key: 123123

package net.lunalabs.central.config;

import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.Properties;

import org.springframework.beans.factory.config.YamlPropertiesFactoryBean;
import org.springframework.core.env.PropertiesPropertySource;
import org.springframework.core.env.PropertySource;
import org.springframework.core.io.support.EncodedResource;
import org.springframework.core.io.support.PropertySourceFactory;

public class YamlPropertySourceFactory implements PropertySourceFactory {

	@Override
	public PropertySource<?> createPropertySource(String name, EncodedResource resource) throws IOException {
		 YamlPropertiesFactoryBean factory = new YamlPropertiesFactoryBean();
	        factory.setResources(resource.getResource());

	        Properties properties = factory.getObject();

	        return new PropertiesPropertySource(resource.getResource().getFilename(), properties);
	}

}

package net.lunalabs.central.config.ftp;

import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;

import lombok.Getter;
import lombok.Setter;
import net.lunalabs.central.config.YamlPropertySourceFactory;

@Setter //이걸로 값을 집어넣는 가보다.
@Getter
@Configuration
//@PropertySource(value = "classpath:ftpconfig.yml",
//factory = YamlPropertySourceFactory.class, ignoreResourceNotFound = true)
@PropertySource(value = "classpath:commonproperties.yml", factory = YamlPropertySourceFactory.class)
@ConfigurationProperties(prefix =  "ftp")
public class FtpProperties {//일단은 하드코딩
	
	public Integer port;
	public String[] userlist;
	public String uploadDir;
}

https://www.baeldung.com/spring-yaml-propertysource

참고

https://www.latera.kr/reference/java/2019-09-29-spring-boot-config-externalize/

https://bottom-to-top.tistory.com/46