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Converting hex string and byte array by Scala

Posted on September 14, 2012 by tmyymmt

Converting hex string to byte array, and byte array to hex string by Scala.

object HexBytesUtil { def hex2bytes(hex: String): Array[Byte] = { if(hex.contains(" ")){ hex.split(" ").map(Integer.parseInt(_, 16).toByte) } else if(hex.contains("-")){ hex.split("-").map(Integer.parseInt(_, 16).toByte) } else { hex.sliding(2,2).toArray.map(Integer.parseInt(_, 16).toByte) } } def bytes2hex(bytes: Array[Byte], sep: Option[String] = None): String = { sep match { case None => bytes.map("%02x".format(_)).mkString case _ => bytes.map("%02x".format(_)).mkString(sep.get) } // bytes.foreach(println) } def example { val data = "48 65 6C 6C 6F 20 57 6F 72 6C 64 21 21" val bytes = hex2bytes(data) println(bytes2hex(bytes, Option(" "))) val data2 = "48-65-6C-6C-6F-20-57-6F-72-6C-64-21-21" val bytes2 = hex2bytes(data2) println(bytes2hex(bytes2, Option("-"))) val data3 = "48656C6C6F20576F726C642121" val bytes3 = hex2bytes(data3) println(bytes2hex(bytes3)) } }

One thought on “Converting hex string and byte array by Scala”

Bob Van Dell II on November 23, 2017 at 04:14 said:

How about:
str.replaceAll(“[^0-9A-Fa-f]”, “”).grouped(2).toArray map { Integer.parseInt(_, 16).toByte }

?

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One thought on “Converting hex string and byte array by Scala”

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