在PDFbox上将PDF设置为图像到图像

我正在尝试设置外部ttf，以便能够从包含阿拉伯语字符的pdf中渲染图像，我需要设置的字体是“Arial”，完成后控制台继续通知它正在使用defaultFont而不是arial。

org.apache.pdfbox.pdmodel.font.PDSimpleFont drawString ATTENTION: Changing font on  from  to the default font 

这是我的代码：

 import java.awt.image.BufferedImage; import java.io.File; import java.io.IOException; import java.util.Iterator; import java.util.List; import java.util.Map; import javax.imageio.ImageIO; import org.apache.pdfbox.pdmodel.PDDocument; import org.apache.pdfbox.pdmodel.PDPage; import org.apache.pdfbox.pdmodel.PDResources; import org.apache.pdfbox.pdmodel.edit.PDPageContentStream; import org.apache.pdfbox.pdmodel.font.PDFont; import org.apache.pdfbox.pdmodel.font.PDTrueTypeFont; import org.apache.pdfbox.pdmodel.font.PDType1Font; import org.apache.pdfbox.pdmodel.graphics.xobject.PDXObjectImage; public class PdfBoxTest { public static void main(String[] args) { PdfBoxTest obj = new PdfBoxTest(); try { obj.read_pdf(); } catch (IOException ex) { System.out.println("" + ex); } } void read_pdf() throws IOException { PDDocument document = null; try { document = PDDocument.load("c:/result.pdf"); } catch (IOException ex) { System.out.println("" + ex); } int i =1; String name = null; PDFont font = PDTrueTypeFont.loadTTF(document, new File( "c:/arial.ttf" )); font.setWidths(PDType1Font.HELVETICA.getWidths()); Listpages = document.getDocumentCatalog().getAllPages(); Iterator iter = pages.iterator(); while (iter.hasNext()) { PDPage page = (PDPage) iter.next(); BufferedImage img = page.convertToImage(); ImageIO.write(img, "png", new File("C:/" + i + ".png")); } } }