java實現PPT轉PDF出現中文亂碼問題的解決方法

ppt轉成pdf，原理是ppt轉成圖片，再用圖片生產pdf，過程有個問題，不管是ppt還是pptx，都遇到中文亂碼，編程方框的問題，其中ppt後綴網上隨便找就有解決方案，就是設置字體為統一字體，pptx如果頁面是一種中文字體不會有問題，如果一個頁面有微軟雅黑和宋體，就會導致部分中文方框，懷疑是poi處理的時候，只讀取第一種字體，所以導致多個中文字體亂碼。

百度和谷歌都找了很久，有看到說apache官網有人說是bug，但他們回复說是字體問題，這個問題其實我覺得poi可能可以自己做，讀取原來字體設置成當前字體，不過性能應該會有很多消耗，反正我估計很多人跟我一樣花費大量時間找解決方案，網上幾乎沒有現成的方案。自己也是一步步嘗試，最終找到解決辦法，ppt格式的就不說了網上找得到，pptx後綴的網上我是沒找到。

問題前的pptx轉成圖片：

解決後的pptx轉成圖片：

解決方法：
讀取每個shape，將文字轉成統一的字體，網上找到的那段代碼不可行，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("宋體"); } } } }

完整代碼如下（除了以上自己的解決方案，大部分是stackoverflow上的代碼）：

 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("宋體"); } } 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("宋體"); } } } } 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>

上面就是為大家分享的java實現PPT轉PDF出現中文亂碼問題的解決方法，希望對大家的學習有所幫助。