hex2bytes and bytes2hex

HexBytesUtil.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))
  }

}