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项目里前端想要上传的ppt转成pdf之后上传oss,好方便前端在页面中预览。找了好几个ppt转pdf的方案, 最终选择Apache poi
<!-- poi --> <dependency> <groupId>org.apache.poi</groupId> <artifactId>poi</artifactId> <version>4.1.2</version> </dependency> <dependency> <groupId>org.apache.poi</groupId> <artifactId>poi-ooxml</artifactId> <version>4.1.2</version> </dependency> <dependency> <groupId>org.apache.poi</groupId> <artifactId>poi-scratchpad</artifactId> <version>4.1.2</version> </dependency> <!-- itextpdf --> <dependency> <groupId>com.itextpdf</groupId> <artifactId>itextpdf</artifactId> <version>5.4.3</version> </dependency> <dependency> <groupId>com.itextpdf</groupId> <artifactId>itext-asian</artifactId> <version>5.2.0</version> </dependency>
由于ppt和pptx文件格式不同,ppt是基于二进制的文件,而pptx是基于xml文件, 也是就pptx是2007年后出现的新的ppt版本,对这两种文件处理方式转换PDF其实都差不多,只是要注意接收文件ppt或pptx以及获取两种文件内容 需要的类处理,即使用POI 里面的XMLSlide 和 HSLFSlide 进行分别处理。
因为最后是要把文件上传到阿里云oss, 需要的是InputStream, 所以这里返回的是转化后pdf的InputStream
/** * @author ErrorRua * @date 2022/11/17 * @description: 转换PPT为PDF工具类 */ public final class PdfConvertUtil { /** * @description: pptxToPdf * @param pptIs: * @return java.io.InputStream * @author ErrorRua * @date 2022/11/21 */ public static InputStream pptToPdf(InputStream pptIs) { Document document = null; PdfWriter pdfWriter = null; try (HSLFSlideShow hslfSlideShow = new HSLFSlideShow(pptIs); ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream() ) { // 获取ppt文件页面 Dimension dimension = hslfSlideShow.getPageSize(); document = new Document(); // pdfWriter实例 pdfWriter = PdfWriter.getInstance(document, byteArrayOutputStream); document.open(); PdfPTable pdfPTable = new PdfPTable(1); List<HSLFSlide> hslfSlideList = hslfSlideShow.getSlides(); for (HSLFSlide hslfSlide : hslfSlideList) { // 设置字体, 解决中文乱码 for (HSLFShape shape : hslfSlide.getShapes()) { HSLFTextShape textShape = (HSLFTextShape) shape; for (HSLFTextParagraph textParagraph : textShape.getTextParagraphs()) { for (HSLFTextRun textRun : textParagraph.getTextRuns()) { textRun.setFontFamily("宋体"); } } } BufferedImage bufferedImage = new BufferedImage((int) dimension.getWidth(), (int) dimension.getHeight(), BufferedImage.TYPE_INT_RGB); Graphics2D graphics2d = bufferedImage.createGraphics(); graphics2d.setPaint(Color.white); graphics2d.setFont(new Font("宋体", Font.PLAIN, 12)); hslfSlide.draw(graphics2d); graphics2d.dispose(); Image image = Image.getInstance(bufferedImage, null); image.scalePercent(50f); // 写入单元格 pdfPTable.addCell(new PdfPCell(image, true)); document.add(image); } return new ByteArrayInputStream(byteArrayOutputStream.toByteArray()); } catch (Exception e) { e.printStackTrace(); return null; } finally { if (document != null) { document.close(); } if (pdfWriter != null) { pdfWriter.close(); } } } /** * @description: pptxToPdf * @param pptIs: * @return java.io.InputStream * @author ErrorRua * @date 2022/11/21 */ public static InputStream pptxToPdf(InputStream pptIs) { Document document = null; PdfWriter pdfWriter = null; try(ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream(); XMLSlideShow slideShow = new XMLSlideShow(pptIs);) { Dimension dimension = slideShow.getPageSize(); document = new Document(); pdfWriter = PdfWriter.getInstance(document, byteArrayOutputStream); document.open(); PdfPTable pdfPTable = new PdfPTable(1); List<XSLFSlide> slideList = slideShow.getSlides(); for (XSLFSlide slide : slideList) { // 设置字体, 解决中文乱码 for (XSLFShape shape : slide.getShapes()) { XSLFTextShape textShape = (XSLFTextShape) shape; for (XSLFTextParagraph textParagraph : textShape.getTextParagraphs()) { for (XSLFTextRun textRun : textParagraph.getTextRuns()) { textRun.setFontFamily("宋体"); } } } BufferedImage bufferedImage = new BufferedImage((int) dimension.getWidth(), (int) dimension.getHeight(), BufferedImage.TYPE_INT_RGB); Graphics2D graphics2d = bufferedImage.createGraphics(); graphics2d.setPaint(Color.white); graphics2d.setFont(new Font("宋体", Font.PLAIN, 12)); slide.draw(graphics2d); graphics2d.dispose(); Image image = Image.getInstance(bufferedImage, null); image.scalePercent(50f); // 写入单元格 pdfPTable.addCell(new PdfPCell(image, true)); document.add(image); } return new ByteArrayInputStream(byteArrayOutputStream.toByteArray()); } catch (Exception e) { e.printStackTrace(); return null; } finally { if (document != null) { document.close(); } if (pdfWriter != null) { pdfWriter.close(); } } } }
import cn.hutool.core.util.StrUtil; import java.awt.*; import java.awt.image.BufferedImage; import org.apache.poi.xslf.usermodel.*; import org.apache.poi.hslf.usermodel.*; import com.itextpdf.text.Document; import com.itextpdf.text.pdf.*; import com.itextpdf.text.Image; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.util.List; /** * 类名称:PdfConvertUtil * 类描述:转为为PDF工具类 */ public final class PdfConverUtil { /** * pptToPdf * @param pptPath PPT文件路径 * @param pdfDir 生成的PDF文件路径 * @return */ public static boolean pptToPdf(String pptPath, String pdfDir) { if (StrUtil.isEmpty(pptPath)) { throw new RuntimeException("word文档路径不能为空"); } if (StrUtil.isEmpty(pdfDir)) { throw new RuntimeException("pdf目录不能为空"); } String pdfPath = pdfDir + StrUtil.sub(pptPath, pptPath.lastIndexOf(StrUtil.BACKSLASH), pptPath.lastIndexOf(StrUtil.DOT)) + StrUtil.DOT + "pdf"; Document document = null; HSLFSlideShow hslfSlideShow = null; FileOutputStream fileOutputStream = null; PdfWriter pdfWriter = null; try { hslfSlideShow = new HSLFSlideShow(new FileInputStream(pptPath)); // 获取ppt文件页面 Dimension dimension = hslfSlideShow.getPageSize(); fileOutputStream = new FileOutputStream(pdfPath); document = new Document(); // pdfWriter实例 pdfWriter = PdfWriter.getInstance(document, fileOutputStream); document.open(); PdfPTable pdfPTable = new PdfPTable(1); List<HSLFSlide> hslfSlideList = hslfSlideShow.getSlides(); for (int i=0; i < hslfSlideList.size(); i++) { HSLFSlide hslfSlide = hslfSlideList.get(i); // 设置字体, 解决中文乱码 for (HSLFShape shape : hslfSlide.getShapes()) { HSLFTextShape textShape = (HSLFTextShape) shape; for (HSLFTextParagraph textParagraph : textShape.getTextParagraphs()) { for (HSLFTextRun textRun : textParagraph.getTextRuns()) { textRun.setFontFamily("宋体"); } } } BufferedImage bufferedImage = new BufferedImage((int)dimension.getWidth(), (int)dimension.getHeight(), BufferedImage.TYPE_INT_RGB); Graphics2D graphics2d = bufferedImage.createGraphics(); graphics2d.setPaint(Color.white); graphics2d.setFont(new java.awt.Font("宋体", java.awt.Font.PLAIN, 12)); hslfSlide.draw(graphics2d); graphics2d.dispose(); Image image = Image.getInstance(bufferedImage, null); image.scalePercent(50f); // 写入单元格 pdfPTable.addCell(new PdfPCell(image, true)); document.add(image); } } catch (Exception e) { e.printStackTrace(); return false; } finally { try { if (document != null) { document.close(); } if (fileOutputStream != null) { fileOutputStream.close(); } if (pdfWriter != null) { pdfWriter.close(); } } catch (IOException e) { e.printStackTrace(); } } return true; } /** * * @Title: pptxToPdf * @param pptPath PPT文件路径 * @param pdfDir 生成的PDF文件路径 */ public static boolean pptxToPdf(String pptPath, String pdfDir) { if (StrUtil.isEmpty(pptPath)) { throw new RuntimeException("word文档路径不能为空"); } if (StrUtil.isEmpty(pdfDir)) { throw new RuntimeException("pdf目录不能为空"); } String pdfPath = pdfDir + StrUtil.sub(pptPath, pptPath.lastIndexOf(StrUtil.BACKSLASH), pptPath.lastIndexOf(StrUtil.DOT)) + StrUtil.DOT + "pdf"; Document document = null; XMLSlideShow slideShow = null; FileOutputStream fileOutputStream = null; PdfWriter pdfWriter = null; try { slideShow = new XMLSlideShow(new FileInputStream(pptPath)); Dimension dimension = slideShow.getPageSize(); fileOutputStream = new FileOutputStream(pdfPath); document = new Document(); pdfWriter = PdfWriter.getInstance(document, fileOutputStream); document.open(); PdfPTable pdfPTable = new PdfPTable(1); List<XSLFSlide> slideList = slideShow.getSlides(); for (int i = 0, row = slideList.size(); i < row; i++) { XSLFSlide slide = slideList.get(i); // 设置字体, 解决中文乱码 for (XSLFShape shape : slide.getShapes()) { XSLFTextShape textShape = (XSLFTextShape) shape; for (XSLFTextParagraph textParagraph : textShape.getTextParagraphs()) { for (XSLFTextRun textRun : textParagraph.getTextRuns()) { textRun.setFontFamily("宋体"); } } } BufferedImage bufferedImage = new BufferedImage((int)dimension.getWidth(), (int)dimension.getHeight(), BufferedImage.TYPE_INT_RGB); Graphics2D graphics2d = bufferedImage.createGraphics(); graphics2d.setPaint(Color.white); graphics2d.setFont(new java.awt.Font("宋体", java.awt.Font.PLAIN, 12)); slide.draw(graphics2d); graphics2d.dispose(); Image image = Image.getInstance(bufferedImage, null); image.scalePercent(50f); // 写入单元格 pdfPTable.addCell(new PdfPCell(image, true)); document.add(image); } } catch (Exception e) { e.printStackTrace(); return false; } finally { try { if (document != null) { document.close(); } if (fileOutputStream != null) { fileOutputStream.close(); } if (pdfWriter != null) { pdfWriter.close(); } } catch (IOException e) { e.printStackTrace(); } } return true; } }
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