[Java知识库]java poi ppt转图片

pom文件添加

        <dependency>
			<groupId>org.apache.poi</groupId>
			<artifactId>poi-ooxml</artifactId>
			<version>3.12</version>
		</dependency>
		<dependency>
			<groupId>org.apache.poi</groupId>
			<artifactId>poi-scratchpad</artifactId>
			<version>3.12</version>
		</dependency>

ppt转图片工具类

public class PPTtoImageUtils {

    private static final Logger logger = LoggerFactory.getLogger(PPTtoImageUtils.class);

    //支持pptx
    public static List<String> pptxToImage(MultipartFile file, String bucket) {
        String originalFileName = file.getOriginalFilename();
        String rootPath = bucket + "/" + System.currentTimeMillis();
        List<String> urlList = Lists.newArrayList();
        try {
        InputStream is = file.getInputStream();
        XMLSlideShow ppt = new XMLSlideShow(is);
        is.close();
        Dimension pgsize = ppt.getPageSize();
        logger.info("pptx to image file [name:{}] [width:{}] [height:{}]", originalFileName, pgsize.width, pgsize.height);
            for (int i = 0; i < ppt.getSlides().size(); i++) {
                //防止中文乱码
                for (XSLFShape shape : ppt.getSlides().get(i).getShapes()) {
                    if (shape instanceof XSLFTextShape) {
                        XSLFTextShape tsh = (XSLFTextShape) shape;
                        for (XSLFTextParagraph p : tsh) {
                            for (XSLFTextRun r : p) {
                                r.setFontFamily("宋体");
                            }
                        }
                    }
                }
                BufferedImage img = new BufferedImage(pgsize.width, pgsize.height, BufferedImage.TYPE_INT_RGB);
                Graphics2D graphics = img.createGraphics();
                // clear the drawing area
                graphics.setPaint(Color.white);
                graphics.fill(new Rectangle2D.Float(0, 0, pgsize.width, pgsize.height));
                // render
                ppt.getSlides().get(i).draw(graphics);
                // save the output
                String filename =  (i + 1) + ".png";
                // 创建输出流
                ByteArrayOutputStream bos = new ByteArrayOutputStream();
                // 将图像输出到输出流中。
                ImageIO.write(img, "png", bos);
                MultipartFile multipartFile = new MockMultipartFile(filename, filename, "image/png", bos.toByteArray());
                //上传到oss
                String url = UploadUtils.simpleUpload(multipartFile, rootPath);
                urlList.add(url);
            }
        } catch (Exception e) {
            logger.error("pptx to image error [name:{}][e:{}] ", originalFileName,e);
            throw new BusinessException(ErrorCode.PPT_TO_IMAGE_ERROR);
        }
        logger.info("pptx to image success [name:{}] ", originalFileName);
        return urlList;
    }

    //支持ppt
    public static List<String> pptToImage(MultipartFile file, String bucket) {
        String originalFileName = file.getOriginalFilename();
        String rootPath = bucket + "/" + System.currentTimeMillis();
        List<String> urlList = Lists.newArrayList();
        try {
            InputStream is = file.getInputStream();
            HSLFSlideShow ppt = new HSLFSlideShow(new HSLFSlideShowImpl(is));
            Dimension pgsize = ppt.getPageSize();
            for (int i = 0; i < ppt.getSlides().size(); i++) {
                //防止中文乱码
                for (HSLFShape shape : ppt.getSlides().get(i).getShapes()) {
                    if (shape instanceof HSLFTextShape) {
                        HSLFTextShape tsh = (HSLFTextShape) shape;
                        for (HSLFTextParagraph p : tsh) {
                            for (HSLFTextRun r : p) {
                                r.setFontFamily("宋体");
                            }
                        }
                    }
                }
                BufferedImage img = new BufferedImage(pgsize.width, pgsize.height, BufferedImage.TYPE_INT_RGB);
                Graphics2D graphics = img.createGraphics();
                // clear the drawing area
                graphics.setPaint(Color.white);
                graphics.fill(new Rectangle2D.Float(0, 0, pgsize.width, pgsize.height));
                // render
                ppt.getSlides().get(i).draw(graphics);
                String filename =  (i + 1) + ".png";
                // 创建输出流
                ByteArrayOutputStream bos = new ByteArrayOutputStream();
                // 将图像输出到输出流中。
                ImageIO.write(img, "png", bos);
                MultipartFile multipartFile = new MockMultipartFile(filename, filename, "image/png", bos.toByteArray());
                //上传到oss
                String url = UploadUtils.simpleUpload(multipartFile, rootPath);
                urlList.add(url);
            }
            logger.info("ppt to image success [name:{}] ", originalFileName);
            return urlList;
        } catch (Exception e) {
            logger.error("ppt to image error [name:{}] [e:{}]", originalFileName,e);
            throw new BusinessException(ErrorCode.PPT_TO_IMAGE_ERROR);
        }

    }