# 사용한 산출물
spring-boot-4.0.8.jar
spring-core-7.0.9.jar
spring-beans-7.0.9.jar
spring-context-7.0.9.jar
HikariCP-7.0.2.jar
commons-logging-1.3.6.jar
slf4j-api-2.0.18.jar

# 같은 키에 두 형식을 넣고 실제로 바인딩한다
5s  -> REJECTED
        org.springframework.boot.context.properties.bind.BindException: Failed to bind properties under 'spring.datasource.hikari.connection-timeout' to long
        org.springframework.core.convert.ConversionFailedException: Failed to convert from type [java.lang.String] to type [long] for value [5s]
        java.lang.NumberFormatException: For input string: "5s"
5000  -> OK   connectionTimeout=5000