Kotlin으로 개발하는 Spring Boot Web MVC #3

Kotlin으로 개발하는 Spring Boot Web MVC #3

목차

실습 환경

• IntelliJ
• Kotlin
• Gradle
• JDK 11
• Spring Boot 2.6.2

실습 코드

https://github.com/0n1dev/kotlin-spring-practice

GitHub - 0n1dev/kotlin-spring-practice: 인프런 강의

Spring Boot Validation

Custom Validation Annotation 만들어서 사용하기

@Constraint(validatedBy = [StringFormatDateTimeValidator::class])
@Target(
    AnnotationTarget.FIELD,
    AnnotationTarget.PROPERTY_GETTER,
    AnnotationTarget.PROPERTY_SETTER
)
@Retention(AnnotationRetention.RUNTIME)
@MustBeDocumented
annotation class StringFormatDateTime(
    val pattern: String = "yyyy-MM-dd HH:mm:ss",
    val message: String = "시간 형식이 유효하지 않습니다.",
    val groups: Array<KClass<*>> = [],
    val payload: Array<KClass<out Payload>> = []
)

class StringFormatDateTimeValidator: ConstraintValidator<StringFormatDateTime, String> {

    private var pattern: String? = null

    override fun initialize(constraintAnnotation: StringFormatDateTime?) {
        this.pattern = constraintAnnotation?.pattern
    }

    // 정상이면 true, 비정상이면 false
    override fun isValid(value: String?, context: ConstraintValidatorContext?): Boolean {
        return try {
            LocalDateTime.parse(value, DateTimeFormatter.ofPattern(pattern))
            true
        } catch (e: Exception) {
            false
        }
    }
}