【每日一博】Java PPT 转成 PDF，中文乱码解决

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（https://bz.apache.org/bugzilla/show_bug.cgi?id=54880），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：

图取每个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，大部分是网上摘抄）：

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> 

参考资料：

http://www.tutorialspoint.com/apache_poi_ppt/apache_poi_ppt_quick_guide.htm