< groupId > org.apache.poi </ groupId > < artifactId > poi-scratchpad </ artifactId > < version > 4.1.1 </ version > </ dependency > <!--图片转pdf--> < dependency > < groupId > com.lowagie </ groupId > < artifactId > itext </ artifactId > < version > 2.1.7 </ version > </ dependency > 复制代码

2、java实现

if(fileName.endsWith("ppt")){
			resObj = upload(file,flag);
			FilesUtil f = new FilesUtil();
			String pptPath = resObj.get("msg").toString();
			String[] pptArr = pptPath.split(".ppt");
			String arr = pptArr[0];
			List<String> result = converPPTtoImage(pptPath, arr+"/", "jpg", 8);
			resObj.put("msg",FILE_PATH + fileName.substring(0, fileName.lastIndexOf("."))+".pdf");
			resObj.put("fileName",fileName.substring(0, fileName.lastIndexOf("."))+".pdf");
			f.imageToPdf(result,FILE_PATH + fileName.substring(0, fileName.lastIndexOf("."))+".pdf");
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/**
	 * 将PPT 文件转换成image
	 * @param orignalPPTFileName //PPT文件路径 如：d:/demo/demo1.ppt
	 * @param targetImageFileDir //转换后的图片保存路径 如：d:/demo/pptImg
	 * @param imageFormatNameString //图片转化的格式字符串 ，如："jpg"、"jpeg"、"bmp" "png" "gif" "tiff"
	 * @return 图片名列表
	 * 生成图片放大的倍数,倍数越高，清晰度越高
	@SuppressWarnings("resource")
	public static List<String> converPPTtoImage(String orignalPPTFileName, String targetImageFileDir,
												String imageFormatNameString, int times) {
		List<String> imgList = new ArrayList<>();
		List<String> imgNamesList = new ArrayList<String>();// PPT转成图片后所有名称集合
		FileInputStream orignalPPTFileInputStream = null;
		FileOutputStream orignalPPTFileOutStream = null;
		HSLFSlideShow oneHSLFSlideShow = null;
		//创建文件夹
		createDirIfNotExist(targetImageFileDir);
		try {
			try {
				orignalPPTFileInputStream = new FileInputStream(orignalPPTFileName);
			} catch (FileNotFoundException e) {
				e.printStackTrace();
				return Collections.emptyList();
			try {
				oneHSLFSlideShow = new HSLFSlideShow(orignalPPTFileInputStream);
			} catch (IOException e) {
				e.printStackTrace();
				return Collections.emptyList();
			// 获取PPT每页的大小（宽和高度）
			Dimension onePPTPageSize = oneHSLFSlideShow.getPageSize();
			// 获得PPT文件中的所有的PPT页面（获得每一张幻灯片）,并转为一张张的播放片
			List<HSLFSlide> pptPageSlideList = oneHSLFSlideShow.getSlides();
			// 下面循环的主要功能是实现对PPT文件中的每一张幻灯片进行转换和操作
			for (int i = 0; i < pptPageSlideList.size(); i++) {
				// 这几个循环只要是设置字体为宋体，防止中文乱码，
				List<List<HSLFTextParagraph>> oneTextParagraphs = pptPageSlideList.get(i).getTextParagraphs();
				for (List<HSLFTextParagraph> list : oneTextParagraphs) {
					for (HSLFTextParagraph hslfTextParagraph : list) {
						List<HSLFTextRun> HSLFTextRunList = hslfTextParagraph.getTextRuns();
						for (int j = 0; j < HSLFTextRunList.size(); j++) {
							// 如果PPT在WPS中保存过，则
							// HSLFTextRunList.get(j).getFontSize();的值为0或者26040，
							// 因此首先识别当前文本框内的字体尺寸是否为0或者大于26040，则设置默认的字体尺寸。
							// 设置字体大小
							Double size = HSLFTextRunList.get(j).getFontSize();
							if ((size <= 0) || (size >= 26040)) {
								HSLFTextRunList.get(j).setFontSize(20.0);
							// 设置字体样式为宋体
							// String
							// family=HSLFTextRunList.get(j).getFontFamily();
							HSLFTextRunList.get(j).setFontFamily("宋体");
				// 创建BufferedImage对象，图像的尺寸为原来的每页的尺寸*倍数times
				BufferedImage oneBufferedImage = new BufferedImage(onePPTPageSize.width * times,
					onePPTPageSize.height * times, BufferedImage.TYPE_INT_RGB);
				Graphics2D oneGraphics2D = oneBufferedImage.createGraphics();
				// 设置转换后的图片背景色为白色
				oneGraphics2D.setPaint(Color.white);
				oneGraphics2D.scale(times, times);// 将图片放大times倍
				oneGraphics2D
					.fill(new Rectangle2D.Float(0, 0, onePPTPageSize.width * times, onePPTPageSize.height * times));
				pptPageSlideList.get(i).draw(oneGraphics2D);
				// 设置图片的存放路径和图片格式，注意生成的图片路径为绝对路径，最终获得各个图像文件所对应的输出流对象
				try {
					String imgName = (i + 1) + "_" + UUID.randomUUID().toString() + "." + imageFormatNameString;
					imgNamesList.add(imgName);// 将图片名称添加的集合中
					imgList.add(targetImageFileDir+imgName);
					orignalPPTFileOutStream = new FileOutputStream(targetImageFileDir + imgName);
				} catch (FileNotFoundException e) {
					e.printStackTrace();
					return Collections.emptyList();
				// 转换后的图片文件保存的指定的目录中
				try {
					ImageIO.write(oneBufferedImage, imageFormatNameString, orignalPPTFileOutStream);
				} catch (IOException e) {
					e.printStackTrace();
					return Collections.emptyList();
		} finally {
			try {
				if (orignalPPTFileInputStream != null) {
					orignalPPTFileInputStream.close();
			} catch (IOException e) {
				e.printStackTrace();
			try {
				if (orignalPPTFileOutStream != null) {
					orignalPPTFileOutStream.close();
			} catch (IOException e) {
				e.printStackTrace();
		return imgList;
	 * 创建文件如果路径不存在则创建对应的文件夹
	 * @param file
	 * @return
	public static File createDirIfNotExist(String file) {
		File fileDir = new File(file);
		if (!fileDir.exists()) {
			fileDir.mkdirs();
		return fileDir;
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public  File imageToPdf(List<String> imageUrllist, String mOutputPdfFileName) {
		Document doc = new Document(PageSize.A4, 20, 20, 20, 20);
		try {
			PdfWriter.getInstance(doc, new FileOutputStream(mOutputPdfFileName));
			doc.open();
			for (int i = 0; i < imageUrllist.size(); i++) {
				doc.newPage();
				Image png1 = Image.getInstance(imageUrllist.get(i));
				float heigth = png1.getHeight();
				float width = png1.getWidth();
				int percent = getPercent2(heigth, width);
				png1.setAlignment(Image.MIDDLE);
				png1.scalePercent(percent + 3);// 表示是原来图像的比例;
				doc.add(png1);
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (DocumentException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}finally {
			doc.close();
		File mOutputPdfFile = new File(mOutputPdfFileName);
		if (!mOutputPdfFile.exists()) {
			mOutputPdfFile.deleteOnExit();
			return null;
		return mOutputPdfFile;
	private int getPercent2(float h, float w) {
		int p = 0;
		float p2 = 0.0f;
		p2 = 530 / w * 100;
		p = Math.round(p2);
		return p;
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