build.sbt p� �sU // play-jsonをフツーのプロジェクトでも使いたいサンプル name := "hello" version := "1.0" scalaVersion := "2.10.3" resolvers += "Typesafe repository" at "http://repo.typesafe.com/typesafe/releases/" libraryDependencies ++=Seq( "com.typesafe.play" %% "play-json" % "2.2.1" ) json.md ドキュメントよりも、もとのヤツのほうが参考になる? http://mandubian.com/2012/10/29/unveiling-play-2-dot-1-json-api-part3-json-transformers/ あと元ソースのコメ