如何在Kotlin中将数据类转换为ByteBuffer? [英] How to convert a Data Class to ByteBuffer in Kotlin?

问题描述

我正在尝试使用Kinesis，它需要字节缓冲区格式的数据.到目前为止，我所看到的所有示例都是使用Java并传递简单的字符串. 有人可以提出如何将Kotlin数据类转换为字节缓冲区的想法吗?

I am trying to use Kinesis, which expects data in byte buffer format. All the examples I have seen so far are in Java and pass simple strings. Can anybody give an idea of how to convert a kotlin data class to bytebuffer?

例如 数据类abc( var a:长， var b:字符串， var c:Double )

e.g. data class abc ( var a: Long, var b: String, var c: Double )

推荐答案

感谢所有建议.

使用杰克逊库(jackson-databind)和注解的ObjectMapper()解决了该问题. 以下代码用于序列化:

Solved the problem using ObjectMapper() of Jackson library (jackson-databind) and annotations. Following code used for serialization:

val objectMapper = ObjectMapper()
objectMapper.registerModule(JavaTimeModule())
val buf = ByteBuffer.wrap(objectMapper.writeValueAsString(className).toByteArray(Charsets.UTF_8))

反序列化代码:

val objectMapper = ObjectMapper()
objectMapper.registerModule(JavaTimeModule())
val obj = objectMapper.readValue(Charsets.UTF_8.decode(record.data()).toString(), ClassName::class.java)

除此之外，我必须添加所有数据类的构造函数，并且必须将以下注释添加到所有LocalDateTime属性:

Apart from this, I had to add constructors of all the data classes and had to add the following annotation to all the LocalDateTime attributes:

@DateTimeFormat(iso = DateTimeFormat.ISO.DATE_TIME)
@JsonFormat(pattern = "YYYY-MM-dd HH:mm")
var edd: LocalDateTime?,

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