Properties 처리 방법

1. Static (DI 가 잘되지 않아 env = null 인 경우, EnvironmentAware를 구현)

@Configuration
@PropertySource("classpath:my.properties")
public class MyConfig implements EnvironmentAware {
    final static Environment env;
    
    @Override
    public void setEnvironment(Environment env) {
        MyConfig.env = env;
    }

2. Contructor DI

@Configuration
@PropertySource("classpath:my.properties")
public class MyConfig {
    final Environment env;

    public MyConfig(Environment env) {
        this.env = env;
    }

3. Setter DI

@Configuration
@PropertySource("classpath:my.properties")
public class MyConfig {
    Environment env;

    @Autowired
    public void setEnv(Environment env) {
        this.env = env;
    }

※ Field DI는 권장되지 않아 사용하지 않을 예정