scala 将Scala中的任何类型转换为Array[Byte]并返回
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Convert Any type in scala to Array[Byte] and back
提问by Ectoras
I have the following question:
我有以下问题：
I have a variable value in my program which is declared as Any value.
我的程序中有一个变量值，它被声明为 Any 值。
I want to convert this value to Byte Array..
我想将此值转换为字节数组..
How can I serialize to byte Array and back? I found examples related to other types such as Double or Int, but not as Any.
如何序列化到字节数组并返回？我找到了与其他类型相关的示例，例如 Double 或 Int，但不是 Any。
回答by Bruce Lowe
This should do what you need. It's pretty similar to how one would do it in Java.
这应该做你需要的。这与人们在 Java 中的做法非常相似。
import java.io.{ByteArrayInputStream, ByteArrayOutputStream, ObjectInputStream, ObjectOutputStream}
object Serialization extends App {
def serialise(value: Any): Array[Byte] = {
val stream: ByteArrayOutputStream = new ByteArrayOutputStream()
val oos = new ObjectOutputStream(stream)
oos.writeObject(value)
oos.close()
stream.toByteArray
}
def deserialise(bytes: Array[Byte]): Any = {
val ois = new ObjectInputStream(new ByteArrayInputStream(bytes))
val value = ois.readObject
ois.close()
value
}
println(deserialise(serialise("My Test")))
println(deserialise(serialise(List(1))))
println(deserialise(serialise(Map(1 -> 2))))
println(deserialise(serialise(1)))
}
回答by Ectoras
def anyTypeToByteArray(value: Any): Array[Byte] = {
val valueConverted :Array[Byte] = SerializationUtils.serialize(value.isInstanceOf[Serializable])
valueConverted
}
def ByteArrayToAny(value: Array[Byte]): Any = {
val valueConverted: Any = SerializationUtils.deserialize(value)
valueConverted
}
