java实现PPT转PDF出现中文乱码问题的解决方法

ppt转成pdf，原理是ppt转成图片，再用图片生产pdf，过程有个问题，不管是ppt还是pptx，都遇到中文乱码，编程方框的问题，其中ppt后缀网上随便找就有解决方案，就是设置字体为统一字体，pptx如果页面是一种中文字体不会有问题，如果一个页面有微软雅黑和宋体，就会导致部分中文方框，怀疑是poi处理的时候，只读取第一种字体，所以导致多个中文字体乱码。

百度和谷歌都找了很久，有看到说apache官网有人说是bug，但他们回复说是字体问题，这个问题其实我觉得poi可能可以自己做，读取原来字体设置成当前字体，不过性能应该会有很多消耗，反正我估计很多人跟我一样花费大量时间找解决方案，网上几乎没有现成的方案。自己也是一步步尝试，最终找到解决办法，ppt格式的就不说了网上找得到，pptx后缀的网上我是没找到。

问题前的pptx转成图片：

解决后的pptx转成图片：

解决方法：
读取每个shape，将文字转成统一的字体，网上找到的那段代码不可行，我自己改的方案如下：

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");  }  }  } }

完整代码如下（除了以上自己的解决方案，大部分是stackoverflow上的代码）：

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"); }

maven配置:

<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>

上面就是为大家分享的java实现PPT转PDF出现中文乱码问题的解决方法，希望对大家的学习有所帮助。