PPT转图片/PDF-实用干货

PPT转图片或者是PDF。也许是日常开发中一个并不常见的需求，网上的技术也五花八门，搜寻一番下自己做了个总结，作者最终使用的是openoffice的方案，当然poi的方案也很优秀

方案1：Spire.Presentation

优点：速度快、精准，代码简洁、转换的图片无乱码
缺点：不开源，超级贵、免费状态下只能转10页（我是在web状态下发请求转换的，发现一个请求可以转10页，不知道如果多个线程或者是多次求情控制每次转10页这种方案是否可行）

官网: https://www.e-iceblue.cn （价格很高）
1. 首先引入maven依赖（这里是免费版）

 <dependency><groupId>e-iceblue</groupId><artifactId>spire.presentation.free</artifactId><version>2.6.1</version></dependency>

    // ppt -> pdf public static void main(String[] args) throws Exception {//create a Presentataion instancePresentation presentation = new Presentation();//load the sample PowerPoint filepresentation.loadFromFile("C:/Users/Administrator/Desktop/template.pptx");//save to PDF filepresentation.saveToFile("ToPDF.pdf", FileFormat.PDF);presentation.dispose();}// ppt -> 图片public static void main(String[] args) throws Exception {//create a Presentation object Presentation presentation = new Presentation();//load an example PPTX file presentation.loadFromFile("C:/Users/Administrator/Desktop/template.pptx");//loop through the slides for (int i = 0; i < presentation.getSlides().getCount(); i++) {//save each slide as a BufferedImage BufferedImage image = presentation.getSlides().get(i).saveAsImage();//save BufferedImage as PNG file format String fileName =  String.format("ToImage-%1$s.png", i);ImageIO.write(image, "PNG",new File(fileName));}presentation.dispose();}

方案2：使用POI的ppt工具

优点：开源免费
缺点：转换后图片模糊、部分ppt样式无法转换、部分会出现ppt大小与图片大小不符的问题,另外还存在ppt文字乱码问题、使用该工具pptx的转换效果优于ppt

1.引入maven依赖

 <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>

2.编写代码，2003版本的ppt(后缀是.ppt)、和2007版本的pptx（后缀是.pptx）转换方法不同

/*** poi 完成ppt->图片 （可以做进度、图片是一张一张的转换的）** @author: Ming* @date: 2020/12/7*/
@Slf4j
public class PoiPPT2Pic {/*** ppt/pptx转图片** @param pptFile    ppt文件* @param saveFolder 要转换的图片保存的文件夹* @return List集合图片在服务器的绝对路径位置* @throws Exception 转换异常*/public static List<String> pptConver2Png(File pptFile, File saveFolder) throws Exception {// 获取后缀并校验String suffix = pptFile.getName().substring(pptFile.getName().lastIndexOf(".") + 1);if (!"ppt".equals(suffix) && !"pptx".equals(suffix)) {log.error("文件格式异常,非ppt,pptx");throw new RuntimeException("文件格式异常,非ppt,pptx");}// 调用指定方法return "ppt".equals(suffix) ? PPT2Pic.ppt2Png(pptFile, saveFolder) : PPT2Pic.pptx2Png(pptFile, saveFolder);}/*** ppt 转图片** @param pptFile    ppt文件* @param saveFolder 要转换的图片保存的文件夹* @return List集合图片在服务器的绝对路径位置* @throws Exception 转换异常*/public static List<String> ppt2Png(File pptFile, File saveFolder) throws Exception {log.info("=>ppt路径为:" + pptFile.getAbsolutePath());log.info("=>要存储的路径为:" + saveFolder.getAbsolutePath());if (!pptFile.exists()) {log.error("ppt文件不存在");return Collections.emptyList();}// 路径不存在则创建if (!saveFolder.exists()) {saveFolder.mkdirs();}// 指定图片保存的路径List<String> pngFileList = new ArrayList<String>();// 开始时间long startTime = System.currentTimeMillis();FileInputStream is = null;// 将ppt文件转换成每一帧的图片HSLFSlideShow ppt = null;try {ZipSecureFile.setMinInflateRatio(-1.0d);is = new FileInputStream(pptFile);ppt = new HSLFSlideShow(is);// 指定indexint idx = 1;Dimension pageSize = ppt.getPageSize();// 缩放比例 3倍以下会迷糊double image_rate = 4.0;// 获取高度宽度int imageWidth = (int) Math.floor(image_rate * pageSize.getWidth());int imageHeight = (int) Math.floor(image_rate * pageSize.getHeight());// 循环获取图片log.info("=>ppt解析完毕共:" + ppt.getSlides().size() + '张');for (HSLFSlide slide : ppt.getSlides()) {// 构造输出流和画布BufferedImage img = new BufferedImage(imageWidth, imageHeight, BufferedImage.TYPE_INT_ARGB);Graphics2D graphics = img.createGraphics();graphics.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);graphics.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);graphics.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BICUBIC);graphics.setRenderingHint(RenderingHints.KEY_FRACTIONALMETRICS, RenderingHints.VALUE_FRACTIONALMETRICS_ON);// 设置底色graphics.setPaint(Color.white);// 绘制区域与缩放比例graphics.fill(new Rectangle2D.Float(0, 0, imageWidth, imageHeight));graphics.scale(image_rate, image_rate);//防止中文乱码 （这里可以为黑体或者宋体）---  即使制定了字体也会出现部分字体或艺术字乱码的现象for (HSLFShape shape : slide.getShapes()) {if (shape instanceof HSLFTextShape) {HSLFTextShape hslfTextShape = (HSLFTextShape) shape;for (HSLFTextParagraph hslfTextParagraph : hslfTextShape) {for (HSLFTextRun hslfTextRun : hslfTextParagraph) {hslfTextRun.setFontFamily("黑体");}}}}// 指定输出流FileOutputStream out = null;try {// 绘制slide.draw(graphics);File pngFile = new File(saveFolder.getAbsolutePath() + String.format("/%d.png", idx++));out = new FileOutputStream(pngFile);// 输出图片ImageIO.write(img, "png", out);log.info("=>第" + (idx - 1) + "张,存储路径:" + pngFile.getAbsolutePath());pngFileList.add(pngFile.getAbsolutePath());} finally {try {if (out != null) {out.flush();out.close();}if (graphics != null) {graphics.dispose();}if (img != null) {img.flush();}} catch (IOException e) {log.error("=>ppt转换流关闭异常", e);}}}} finally {try {if (is != null) {is.close();}if (ppt != null) {ppt.close();}} catch (Exception e) {log.error("=>ppt转换流关闭异常", e);}}log.info("=>ppt转换完成，共用时" + ((System.currentTimeMillis() - startTime) / 1000) + "秒");return pngFileList;}/*** pptx 转换到png** @param pptxFile   ppt文件* @param saveFolder 图片保存的文件按夹* @return List集合图片在服务器的绝对路径位置* @throws Exception 转换异常*/public static List<String> pptx2Png(File pptxFile, File saveFolder) throws Exception {log.info("=>ppt路径为:" + pptxFile.getAbsolutePath());log.info("=>要存储的路径为:" + saveFolder.getAbsolutePath());if (!pptxFile.exists()) {log.error("pptx文件不存在");return Collections.emptyList();}// 路径不存在则创建if (!saveFolder.exists()) {saveFolder.mkdirs();}List<String> pngFileList = new ArrayList<>();long startTime = System.currentTimeMillis();FileInputStream is = null;// 将ppt文件转换成每一帧的图片XMLSlideShow pptx = null;try {ZipSecureFile.setMinInflateRatio(-1.0d);is = new FileInputStream(pptxFile);pptx = new XMLSlideShow(is);// 指定indexint idx = 1;Dimension pageSize = pptx.getPageSize();// 缩放比例 3倍以下会迷糊double image_rate = 4.0;// 获取高度宽度int imageWidth = (int) Math.floor(image_rate * pageSize.getWidth());int imageHeight = (int) Math.floor(image_rate * pageSize.getHeight());log.info("=>pptx解析完毕共:" + pptx.getSlides().size() + '张');for (XSLFSlide xslfSlide : pptx.getSlides()) {// 构造输出流和画布BufferedImage img = new BufferedImage(imageWidth, imageHeight, BufferedImage.TYPE_INT_ARGB);Graphics2D graphics = img.createGraphics();graphics.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);graphics.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);graphics.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BICUBIC);graphics.setRenderingHint(RenderingHints.KEY_FRACTIONALMETRICS, RenderingHints.VALUE_FRACTIONALMETRICS_ON);// 设置底色graphics.setPaint(Color.white);// 绘制区域与缩放比例graphics.fill(new Rectangle2D.Float(0, 0, imageWidth, imageHeight));graphics.scale(image_rate, image_rate);//防止中文乱码 （这里可以为黑体或者宋体）---  即使制定了字体也会出现部分字体或艺术字乱码的现象for (XSLFShape shape : xslfSlide.getShapes()) {if (shape instanceof XSLFTextShape) {XSLFTextShape xslfTextShape = (XSLFTextShape) shape;for (XSLFTextParagraph xslfTextParagraph : xslfTextShape) {for (XSLFTextRun xslfTextRun : xslfTextParagraph) {xslfTextRun.setFontFamily("黑体");}}}}// 指定输出流FileOutputStream out = null;try {xslfSlide.draw(graphics);File pngFile = new File(saveFolder.getAbsolutePath() + String.format("/%d.png", idx++));out = new FileOutputStream(pngFile);// 输出图片ImageIO.write(img, "png", out);pngFileList.add(pngFile.getAbsolutePath());log.info("=>第" + (idx - 1) + "张,存储路径:" + pngFile.getAbsolutePath());} finally {try {if (out != null) {out.flush();out.close();}if (graphics != null) {graphics.dispose();}if (img != null) {img.flush();}} catch (IOException e) {log.error("=>pptx转换流关闭异常", e);}}}} finally {try {if (is != null) {is.close();}if (pptx != null) {pptx.close();}} catch (Exception e) {log.error("=>pptx转换流关闭异常", e);}}log.info("=>pptx转换完成，共用时" + ((System.currentTimeMillis() - startTime) / 1000) + "秒");return pngFileList;}public static void main(String[] args) throws Exception {PPT2Pic.pptConver2Png(new File("C:\\Users\\Ming\\Desktop\\烟台家宽建维协同管理系统介绍材料.pptx"),new File("C:\\Users\\Ming\\Desktop\\新建文件夹\\123"));}
}

方案3：使用openoffice

优点：免费、转换准确度搞
缺点：需要第三方软件支持、占用一定内存、转换时间较长，另外openoffice只能实现ppt转pdf，pdf转图片需要另外编写代码

OpenOffice.org 是一套跨平台的办公室软件套件，能在 Windows、Linux、MacOS X (X11)、和 Solaris 等操作系统上执行。它与各个主要的办公室软件套件兼容。OpenOffice.org 是自由软件，任何人都可以免费下载、使用、及推广它。
官方下载地址：http://www.openoffice.org/ (需要安装)
1. 引入jar包
注意: 这里有两种方案完成转换
1.是在程序运行前通过命令的方式启动openoffice
2.是在程序运行中通过代码启动，转换完毕后后关闭
二者基于的jar包不同，请仔细阅读maven依赖中后两个依赖的说明

     <dependency><groupId>org.openoffice</groupId><artifactId>jurt</artifactId><version>3.0.1</version></dependency><dependency><groupId>org.openoffice</groupId><artifactId>ridl</artifactId><version>3.0.1</version></dependency><dependency><groupId>org.openoffice</groupId><artifactId>juh</artifactId><version>3.0.1</version></dependency><dependency><groupId>org.openoffice</groupId><artifactId>unoil</artifactId><version>3.0.1</version></dependency><!-- 注意：jodconverter的2.2.2版本在中央仓库不具备，需要大家下载后手动安装到本地仓库下载地址如下https://sourceforge.net/projects/jodconverter/files/JODConverter/此外：2.2.1是不兼容docx和pptx的若需要兼容则采用2.2.2或者修改默认类配置具体修改可参考：https://blog.csdn.net/zhangjunli/article/details/104941509若采用jodconverter-core的方式则无关这个jar，也不需要关注兼容性问题--><dependency><groupId>com.artofsolving</groupId><artifactId>jodconverter</artifactId><version>2.2.1</version></dependency><!--  这个jar包是实现openOffice服务程序代码中启动的jar，与上边的jar包属于两种工作方式 ---><dependency><groupId>com.github.livesense</groupId><artifactId>jodconverter-core</artifactId><version>1.0.5</version></dependency>

2.编写代码

1>方式1：命令式启动 + 代码转换
进入openoffice安装目录，通过cmd启动一个soffice服务，
启动的命令是soffice -headless -accept="socket,host=127.0.0.1,port=8100;urp;"
/*** 将ppt转换为pdf, 这个方法其实可用于docx ppt等转换为pdf 或者html* @param sourceFile ppt文件* @param pdfFile 要输出的pdf文件路径+名字* @return  pdf绝对路径* @throws Exception 转换异常*/public static String officeToPDF(File sourceFile, File pdfFile) throws Exception {// 获取后缀并校验String suffix = sourceFile.getName().substring(sourceFile.getName().lastIndexOf(".") + 1);if (!"ppt".equals(suffix) && !"pptx".equals(suffix)) {log.error("文件格式异常,非ppt,pptx");throw new RuntimeException("文件格式异常,非ppt,pptx");}if (!sourceFile.exists()) {// 找不到源文件, 则返回falsethrow new RuntimeException("ppt文件不存在");}// 如果目标路径不存在, 则新建该路径if (!pdfFile.getParentFile().exists()) {pdfFile.getParentFile().mkdirs();}// 获取openOffice服务的链接。默认为8100OpenOfficeConnection connection = new SocketOpenOfficeConnection("127.0.0.1", 8100);connection.connect();//用于测试openOffice连接时间log.info("链接成功,开始转换");long start = System.currentTimeMillis();DocumentConverter converter = new StreamOpenOfficeDocumentConverter(connection);converter.convert(sourceFile, pdfFile);//测试word转PDF的转换时间log.info("转换结束:" + ((System.currentTimeMillis() - start) / 1000));connection.disconnect();return pdfFile.getAbsolutePath();}
// ========================================================
2> 方式2：程序中启动关闭openOffice服务
/***  打开服务器* @return*/public static OfficeManager startService() {OfficeManager officeManage = null;DefaultOfficeManagerConfiguration configuration = new DefaultOfficeManagerConfiguration();try {log.info("=>openOffice准备启动服务....");configuration.setOfficeHome("C:\\Program Files (x86)\\OpenOffice 4");// 设置OpenOffice.org安装目录configuration.setPortNumbers(8100); // 设置转换端口，默认为8100configuration.setTaskExecutionTimeout(1000 * 60 * 5L);// 设置任务执行超时为5分钟configuration.setTaskQueueTimeout(1000 * 60 * 60 * 24L);// 设置任务队列超时为24小时officeManage = configuration.buildOfficeManager();officeManage.start(); // 启动服务log.info("=>openOffice服务启动成功");} catch (Exception ce) {log.info("openOffice转换服务启动失败!详细信息:" + ce);}return officeManage;}// 关闭服务器public static void stopService(OfficeManager officeManager) {log.info("=>关闭office转换服务....");if (officeManager != null) {officeManager.stop();}log.info("=>关闭office转换成功!");}/***  ppt 转pdf java程序启动方式* @param sourceFile* @param pdfFile* @throws FileNotFoundException*/public static String convert2PDF(File sourceFile, File pdfFile) throws FileNotFoundException {// 获取后缀并校验String suffix = sourceFile.getName().substring(sourceFile.getName().lastIndexOf(".") + 1);if (!"ppt".equals(suffix) && !"pptx".equals(suffix)) {log.error("文件格式异常,非ppt,pptx");throw new RuntimeException("文件格式异常,非ppt,pptx");}if (!sourceFile.exists()) {// 找不到源文件, 则返回falsethrow new RuntimeException("ppt文件不存在");}OfficeManager officeManager = startService();if (officeManager ==null) {throw  new RuntimeException("openOffice服务启动失败");}log.info("=>进行文档转换转换:" + sourceFile.getAbsolutePath() + " --> " + pdfFile.getAbsolutePath());long start = System.currentTimeMillis();OfficeDocumentConverter converter = new OfficeDocumentConverter(officeManager);// 如果目标路径不存在, 则新建该路径if (!pdfFile.getParentFile().exists()) {pdfFile.getParentFile().mkdirs();}converter.convert(sourceFile,pdfFile);log.info("转换成功:" + ((System.currentTimeMillis() - start) / 1000));stopService(officeManager);return  pdfFile.getAbsolutePath();}

测试发现jodconverter-core的方式通过wps打开的ppt无法完成转换，pptx可以转换，office打开的ppt和pptx都可以

这里顺便说一下pdf转图片，使用pdfbox

引入依赖

     <dependency><groupId>org.apache.pdfbox</groupId><artifactId>pdfbox</artifactId><version>2.0.20</version></dependency>

实现代码转换

/*** dpi越大转换后越清晰，相对转换速度越慢*/private static final Integer DPI = 100;/*** 转换后的图片类型*/private static final String IMG_TYPE = "png";/*** pdf转图片** @param pdfFile pdf路径* @param folderPath 图片保存位置* @return* @throws IOException*/public static List<String> pdfToImage(File pdfFile, File folderPath) throws IOException {log.info("=>pdf转图片");log.info("=>pdf路径为:" + pdfFile.getAbsolutePath());log.info("=>要存储的图片路径为:" + folderPath.getAbsolutePath());long start =  System.currentTimeMillis();// 返回值List<String> result = new ArrayList<>();log.info("=>正在读取pdf");PDDocument document = PDDocument.load(new FileInputStream(pdfFile));PDFRenderer renderer = new PDFRenderer(document);FileOutputStream out = null;log.info("=>读取完毕开始转换，共"+document.getNumberOfPages() +"张");for (int i = 0; i < document.getNumberOfPages(); ++i) {BufferedImage bufferedImage = renderer.renderImageWithDPI(i, DPI);File pngFile = new File(folderPath.getAbsolutePath() + String.format("/%d.png", (i+1)));out = new FileOutputStream(pngFile);ImageIO.write(bufferedImage, IMG_TYPE, out);log.info("=>第"+(i+1)+"张转换完毕,"+pngFile.getAbsolutePath());result.add(pngFile.getAbsolutePath());out.close();}log.info("=>转换结束-成功," + ((System.currentTimeMillis() - start) / 1000) + "秒");return result;}