java实现PPT转PDF出现中文乱码问题的解决方法

for( XSLFShape shape : slide[i].getShapes() ){
  if ( shape instanceof XSLFTextShape ){
  XSLFTextShape txtshape = (XSLFTextShape)shape ;
  System.out.println("txtshape" + (i+1) + ":" + txtshape.getShapeName());
  System.out.println("text:" +txtshape.getText());
  
  for ( XSLFTextParagraph textPara : txtshape.getTextParagraphs() ){
  List<XSLFTextRun> textRunList = textPara.getTextRuns();
  for(XSLFTextRun textRun: textRunList) {
  textRun.setFontFamily("宋体");
  }
  }
  }
 }

public static void convertPPTToPDF(String sourcepath, String destinationPath, String fileType) throws Exception {
 FileInputStream inputStream = new FileInputStream(sourcepath);
 double zoom = 2;
 AffineTransform at = new AffineTransform();
 at.setToScale(zoom, zoom);
 Document pdfDocument = new Document();
 PdfWriter pdfWriter = PdfWriter.getInstance(pdfDocument, new FileOutputStream(destinationPath));
 PdfPTable table = new PdfPTable(1);
 pdfWriter.open();
 pdfDocument.open();
 Dimension pgsize = null;
 Image slideImage = null;
 BufferedImage img = null;
 if (fileType.equalsIgnoreCase(".ppt")) {
 SlideShow ppt = new SlideShow(inputStream);
 inputStream.close();
 pgsize = ppt.getPageSize();
 Slide slide[] = ppt.getSlides();
 pdfDocument.setPageSize(new Rectangle((float) pgsize.getWidth(), (float) pgsize.getHeight()));
 pdfWriter.open();
 pdfDocument.open();
 for (int i = 0; i < slide.length; i++) {
  
 TextRun[] truns = slide[i].getTextRuns(); 
 for ( int k=0;k<truns.length;k++){ 
  RichTextRun[] rtruns = truns[k].getRichTextRuns(); 
  for(int l=0;l<rtruns.length;l++){ 
//  int index = rtruns[l].getFontIndex(); 
//  String name = rtruns[l].getFontName(); 
  rtruns[l].setFontIndex(1); 
  rtruns[l].setFontName("宋体");  
  } 
 } 
  
  
 img = new BufferedImage((int) Math.ceil(pgsize.width * zoom), (int) Math.ceil(pgsize.height * zoom), BufferedImage.TYPE_INT_RGB);
 Graphics2D graphics = img.createGraphics();
 graphics.setTransform(at);
 
 graphics.setPaint(Color.white);
 graphics.fill(new Rectangle2D.Float(0, 0, pgsize.width, pgsize.height));
 slide[i].draw(graphics);
 graphics.getPaint();
 slideImage = Image.getInstance(img, null);
 table.addCell(new PdfPCell(slideImage, true));
 }
 }
 if (fileType.equalsIgnoreCase(".pptx")) {
 XMLSlideShow ppt = new XMLSlideShow(inputStream);
 pgsize = ppt.getPageSize();
 XSLFSlide slide[] = ppt.getSlides();
 pdfDocument.setPageSize(new Rectangle((float) pgsize.getWidth(), (float) pgsize.getHeight()));
 pdfWriter.open();
 pdfDocument.open();
 
 
 for (int i = 0; i < slide.length; i++) {
 for( XSLFShape shape : slide[i].getShapes() ){
  if ( shape instanceof XSLFTextShape ){
  XSLFTextShape txtshape = (XSLFTextShape)shape ;
  // System.out.println("txtshape" + (i+1) + ":" + txtshape.getShapeName());
  //System.out.println("text:" +txtshape.getText());
  
  for ( XSLFTextParagraph textPara : txtshape.getTextParagraphs() ){
  List<XSLFTextRun> textRunList = textPara.getTextRuns();
  for(XSLFTextRun textRun: textRunList) {
  textRun.setFontFamily("宋体");
  }
  }
  }
 }
 img = new BufferedImage((int) Math.ceil(pgsize.width * zoom), (int) Math.ceil(pgsize.height * zoom), BufferedImage.TYPE_INT_RGB);
 Graphics2D graphics = img.createGraphics();
 graphics.setTransform(at);
 graphics.setPaint(Color.white);
 graphics.fill(new Rectangle2D.Float(0, 0, pgsize.width, pgsize.height));
 slide[i].draw(graphics);
  
  
// FileOutputStream out = new FileOutputStream("src/main/resources/test"+i+".jpg"); 
// javax.imageio.ImageIO.write(img, "jpg", out);
  
  
  
 graphics.getPaint();
 slideImage = Image.getInstance(img, null);
 table.addCell(new PdfPCell(slideImage, true));
 }
 }
 pdfDocument.add(table);
 pdfDocument.close();
 pdfWriter.close();
 System.out.println("Powerpoint file converted to PDF successfully");
 }

<dependency>
 <groupId>org.apache.poi</groupId>
 <artifactId>poi</artifactId>
 <!-- <version>3.13</version> -->
 <version>3.9</version>
 </dependency>
 <dependency>
 <groupId>org.apache.poi</groupId>
 <artifactId>poi-ooxml</artifactId>
 <!-- <version>3.10-FINAL</version> -->
 <version>3.9</version>
 </dependency>
 
 <dependency>
 <groupId>com.itextpdf</groupId>
 <artifactId>itextpdf</artifactId>
 <version>5.5.7</version>
 </dependency>
 
 <dependency>
 <groupId>com.itextpdf.tool</groupId>
 <artifactId>xmlworker</artifactId>
 <version>5.5.7</version>
 </dependency>
 <dependency>
 <groupId>org.apache.poi</groupId>
 <artifactId>poi-scratchpad</artifactId>
 <!-- <version>3.12</version> -->
 <version>3.9</version>
 </dependency>