Qiita:Teamの投稿をMarkdownファイルでエクスポート ref: http://qiita.com/piyo7/items/6d0a831b1fb90392f485

build.properties

sbt.version=0.13.7

build.sbt

name := "splitQiitaTeamJson"

version := "1.0"

scalaVersion := "2.11.4"

libraryDependencies += "org.json4s" %% "json4s-native" % "3.2.11"

file3.txt

> tree /F
├─piyo7
│      boost__optionalにモナドのbindを.md
│      ICML 2014 Best Paper斜め読み.md
│      Qiita_Teamの更新をChatWorkに通知する.md
...
├─piyo8
...

Main.scala

case class QiitaTeamUser(url_name: String)

case class QiitaTeamPost(title: String, user: QiitaTeamUser, raw_body: String)

object Main extends App {

  splitQiitaTeamJson("C:\\TEMP\\123456789.json") // エクスポートしたJSONファイルのパス

  def splitQiitaTeamJson(file: String) {
    using(scala.io.Source.fromFile(file, "UTF-8")) { source =>
      // JSONパース
      implicit val formats = org.json4s.DefaultFormats
      val json = org.json4s.native.JsonMethods.parse(source.mkString)
      val posts = json.children.map(_.extract[QiitaTeamPost])

      // Markdownファイル出力
      posts.foreach { post =>
        val dir = "out\\" + post.user.url_name
        val file = post.title.replaceAll("[\\/:*?\"<>|]", "_") + ".md" // Windowsのパス禁止文字を置換
        new java.io.File(dir).mkdirs()
        writeFile(dir + "\\" + file)(_.print(post.raw_body))
      }
    }

    // 簡易loanパターン
    def using[A <: {def close() : Unit}](s: A)(f: A => Any) {
      try f(s)
      finally s.close()
    }

    def writeFile(file: String)(f: java.io.PrintWriter => Unit) {
      import java.io._
      try using(new PrintWriter(new OutputStreamWriter(new FileOutputStream(file), "UTF-8")))(f)
      catch {
        case e: FileNotFoundException => println(e)
      }
    }
  }
}