Scala Pickling用于Json序列化和反序列化？

import scala.pickling._,json._    

 // Uses macros implicitly on Scope
 def toJSONString[A](obj: A,prettyPrint: Boolean = false)(implicit pickler: A => JSONPickle) = {
    val json = pickler(obj)
    myPrettyPrinter.print(json.value,prettyPrint)
 }

 // Uses macros defined elsewhere
 def toJSONString(obj: Any,prettyPrint: Boolean = false) = {
    val json = classToPicklerMap(obj.getClass)(obj)
    myPrettyPrinter.print(json.value,prettyPrint)
 }

 // Uses runtime reflection
 def toJSONString(obj: Any,prettyPrint: Boolean = false) = {
    val json = obj.pickle
    myPrettyPrinter.print(json.value,prettyPrint)
 }

 // Uses macros implicitly on scope
 def fromJSONString[A](json: String)(implicit unpickler: JSONPickle => A): A = {
    unpickler(JSONPickle(json))
 }

 // Uses macros defined elsewhere #1
 def fromJSONString[A](json: String)(implicit c: ClassTag[A]) = {
    classnameToUnpicklerMap(c.runtimeClass.getName)(json).asInstanceOf[A]
 }

 // Uses macros defined elsewhere #2
 def fromJSONString(json: String): Any = {
    val className = parseClassName(json) // Class name is stored in "tpe" field in the JSON    
    classnameToUnpicklerMap(className)(json)
 }

 // Uses runtime reflection
 def fromJSONString(json: String) = JSONPickler(json).unpickle