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 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。

百度和谷歌上，看到apache官 上有人说是bug，但他们回复说是字体问题，这个问题其实poi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，估计很多人花费大量时间找解决方案，但 上几乎没有现成的方案。经过多次尝试，最终为大家提供以下解决方法。

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，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>

标签：文件格式转换PDFPPT乱码