iTextとJFreeChartとscala-ioでpdfにグラフを出力しちゃうコード(日本語対応)

build.sbt

libraryDependencies += "com.github.scala-incubator.io" %% "scala-io-core" % "0.3.0"

libraryDependencies += "com.github.scala-incubator.io" %% "scala-io-file" % "0.3.0"

itext.scala

import scalax.io._
import scalax.file.Path
import Path.string2path

import java.awt.{Font => jaFont}
import java.awt.geom.Rectangle2D

import com.itextpdf.text.Font
import com.itextpdf.text.Document
import com.itextpdf.text.Paragraph
import com.itextpdf.text.PageSize
import com.itextpdf.text.pdf.PdfPTable
import com.itextpdf.text.pdf.PdfPCell
import com.itextpdf.text.pdf.PdfWriter
import com.itextpdf.text.pdf.BaseFont
import com.itextpdf.awt.PdfGraphics2D
import com.itextpdf.awt.DefaultFontMapper
import com.itextpdf.awt.FontMapper

import org.jfree.chart.ChartFactory
import org.jfree.chart.StandardChartTheme
import org.jfree.chart.title.TextTitle
import org.jfree.chart.plot.PlotOrientation
import org.jfree.chart.JFreeChart
import org.jfree.data.category.DefaultCategoryDataset

object PdfWriterOpt {
  implicit def str2Elem(s:String)(implicit font:Font) = new Paragraph(s,font)
  def A4PdfWriter(outputFileName:String)(f:(Font) => PdfWriter => Document => Unit) {
    val defaultFont =  new Font(
      BaseFont.createFont("HeiseiKakuGo-W5", "UniJIS-UCS2-H",BaseFont.NOT_EMBEDDED),15)
    outputFileName outputStream() foreach {stream =>
      val doc = new Document(PageSize.A4,50,50,50,50)
      val writer = PdfWriter.getInstance(doc,stream)
      doc.open
      f(defaultFont)(writer)(doc)
      doc.close
    }
  }
  case class JapaneseFontMapper(bfont:BaseFont) extends FontMapper {
    def awtToPdf(font:jaFont) = bfont
    def pdfToAwt(font:BaseFont, size:Int) = new jaFont("dialog",jaFont.PLAIN,size)
  }
  def GraphWriter(size:(Float,Float) = (400,200),position:(Float,Float) = (0,0))(
    f: => JFreeChart)(implicit writer:PdfWriter) = {
    val (width,height) = size
    val cb = writer.getDirectContent()
    val template = cb.createTemplate(width,height)
    val defaultFont = BaseFont.createFont(
      "HeiseiKakuGo-W5", "UniJIS-UCS2-H", BaseFont.NOT_EMBEDDED);
    val g = new PdfGraphics2D(
      template, width, height, JapaneseFontMapper(defaultFont));
    val rect = new Rectangle2D.Double(0,0,width,height)
    f.draw(g,rect)
    g.dispose()
    cb.addTemplate(template, position._1, position._2)
  }
  def addEmptyLines(lines:Int)(implicit doc:Document,font:Font) =
    for(_ <- (1 to lines)) doc.add(" ")
}

object Itext extends App {
  import PdfWriterOpt._
  A4PdfWriter(
   //"../itextView/public/images/sample.pdf"
   "sample.pdf"
  ){implicit font => implicit writer => implicit doc =>
    doc.add("itext + JFreeChartのsample")

    GraphWriter((500,220),(50,510)){
      val current = Array(
        215.3,152.8,129.9,119.2,133.1,156.4,176.2,171.2,246.8,165.1,233.7,256.8)
      val last = Array(
        244.4,167.5,129.1,115.7,120.9,165.6,223.8,175.3,222.1,159.3,223.4,249.4)
      val label = (1 to 12) map ("%02d".format(_))

      val ds = new DefaultCategoryDataset()
      (current zip label) map {case (num,label) => ds.addValue(num,"今年の雨量",label)}
      (last zip label) map {case (num,label) => ds.addValue(num,"去年の雨量",label)}
      ChartFactory.createBarChart(
        "雨量グラフ", "2012年", "雨量", ds, PlotOrientation.VERTICAL, true, true, false)
    }

    addEmptyLines(13)
    doc.add("表示位置決めるのが面倒")
  }
}

http://sourceforge.net/projects/jfreechart/files/latest/download?source=files
http://sourceforge.net/projects/jfreechart/files/3.%20JCommon/1.0.17/jcommon-1.0.17.zip/download
http://sourceforge.net/projects/itext/files/iText/iText5.2.1/itext-5.2.1.zip/download
http://sourceforge.net/projects/itext/files/extrajars/extrajars-2.2.zip/download
をダウンロードして、"itext-asian.jar", "itextpdf-5.2.1.jar","jfreechart-1.0.14.jar","jcommon-1.0.17.jar"
を取り出し"lib/"に突っ込む

"sbt run"でcurrentにsample.pdfが作成される