Library

gradle:

implementation("com.fasterxml.jackson.dataformat:jackson-dataformat-csv")

You don’t need to specify the version in normally spring boot project, because your parent dependency already has it.

Code

val schema = CsvSchema.emptySchema().withHeader()
val mapper: ObjectReader = CsvMapper().readerFor(MyEntity::class.java).with(schema)
mapper.readValues<MyEntity>(csvJson).readAll()

In MyEntity, you don’t need any other annotations, just normal fasterxml annotations is enough:

class MyEntity{
    @JsonProperty("first_string")
    var firstString: String? = null
    
    @JsonProperty("second_string")
    var secondString: String? = null
    
    @JsonProperty("third_date")
    @JsonFormat(pattern = "yyyy-MM-dd", timezone = "Asia/Shanghai")
    var thirdDate: Date? = null
}