java 使用poi将PPT转为图片,在线预览PPT

在线预览PPT,我的思路为java 使用poi将PPT转为图片，图片存储到指定的文件夹下面，然后返回生成的图片名称集合，将图片路径遍历到前台的html标签上，用HTML前台模仿画一个PPT框架，操作图片地址路径从而实现模拟在线预览的效果；前台代码省略，如下是后台的一个工具类，拿去直接可以用（但前提是不要忘记导入POI jar包哦！！），使用哪些jar包也写在下面了，写在这里，后面自己在用时方便，也为后人方便吧

package com;import java.awt.Color;import java.awt.Dimension;import java.awt.Graphics2D;import java.awt.geom.Rectangle2D;import java.awt.image.BufferedImage;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;import java.util.UUID;import javax.imageio.ImageIO;import org.apache.poi.hslf.usermodel.HSLFSlide;import org.apache.poi.hslf.usermodel.HSLFSlideShow;import org.apache.poi.hslf.usermodel.HSLFTextParagraph;import org.apache.poi.hslf.usermodel.HSLFTextRun;import org.apache.poi.xslf.usermodel.XMLSlideShow;import org.apache.poi.xslf.usermodel.XSLFSlide;import org.apache.xmlbeans.XmlException;import org.openxmlformats.schemas.drawingml.x2006.main.CTRegularTextRun;import org.openxmlformats.schemas.drawingml.x2006.main.CTTextBody;import org.openxmlformats.schemas.drawingml.x2006.main.CTTextCharacterProperties;import org.openxmlformats.schemas.drawingml.x2006.main.CTTextFont;import org.openxmlformats.schemas.drawingml.x2006.main.CTTextParagraph;import org.openxmlformats.schemas.presentationml.x2006.main.CTGroupShape;import org.openxmlformats.schemas.presentationml.x2006.main.CTShape;import org.openxmlformats.schemas.presentationml.x2006.main.CTSlide;/** * PPT转image工具类 * 使用的Apache poi-3.14的版本  依赖第三方jar包：poi-3.14-20160307.jar、poi-ooxml-3.14-20160307.jar、 * poi-ooxml-schemas-3.14-20160307.jar、poi-scratchpad-3.14-20160307.jar、xmlbeans-2.6.0.jar * @author yds  * @date 2017-03-22 * */public class ConverPPTFileToImageUtil {/** * 将PPTX 文件转换成image * @param orignalPPTFileName  //PPTX文件路径 如：d:/demo/demo1.pptx * @param targetImageFileDir //转换后的图片保存路径 如：d:/demo/pptxImg * @param imageFormatNameString //图片转化的格式字符串 ，如："jpg"、"jpeg"、"bmp" "png" "gif" "tiff" * @return Map<String,Object> * key: converReturnResult   类型：boolean 转化结果 true 代表转换成功，false 代表转换失败 * key:imgNames  类型：List<String> 转换成功后图片的全部名称集合 * 注：获取“imgNames”图片名称集合时，请先判断“converReturnResult” 是否为true；如果有一张转换失败则为false */@SuppressWarnings("resource")public static  Map<String,Object> converPPTXtoImage(String orignalPPTFileName,String targetImageFileDir,String imageFormatNameString){Map<String,Object> map=new HashMap<String, Object>();boolean converReturnResult=false;//是否全部转成功List<String> imgNamesList=new ArrayList<String>();//PPT转成图片后所有名称集合FileInputStream orignalPPTFileInputStream=null;FileOutputStream orignalPPTFileOutStream=null;XMLSlideShow oneSlideShow=null;try{try {orignalPPTFileInputStream=new FileInputStream(orignalPPTFileName);} catch (FileNotFoundException e) {e.printStackTrace();map.put("converReturnResult", converReturnResult);return map;}try {oneSlideShow=new XMLSlideShow(orignalPPTFileInputStream);} catch (IOException e) {e.printStackTrace();map.put("converReturnResult", converReturnResult);return map;}//获取PPT每页的尺寸大小（宽和高度）Dimension onePPTPageSize=oneSlideShow.getPageSize();//获取PPT文件中的所有PPT页面，并转换为一张张播放片List<XSLFSlide> pptPageXSLFSLiseList= oneSlideShow.getSlides();String xmlFontFormat="<xml-fragment xmlns:a=\"http://schemas.openxmlformats.org/drawingml/2006/main\" xmlns:r=\"http://schemas.openxmlformats.org/officeDocument/2006/relationships\" xmlns:p=\"http://schemas.openxmlformats.org/presentationml/2006/main\">"+ "<a:rPr lang=\"zh-CN\" altLang=\"en-US\" dirty=\"0\" smtClean=\"0\"> "+"<a:latin typeface=\"+mj-ea\"/> "+                                "</a:rPr>"+                              "</xml-fragment>";  for (int i = 0; i < pptPageXSLFSLiseList.size(); i++) {/** * 设置中文为宋体，解决中文乱码问题 */CTSlide oneCTSlide=pptPageXSLFSLiseList.get(i).getXmlObject();CTGroupShape oneCTGroupShape=oneCTSlide.getCSld().getSpTree(); List<CTShape>  oneCTShapeList=oneCTGroupShape.getSpList(); for (CTShape ctShape : oneCTShapeList) { CTTextBody oneCTTextBody = ctShape.getTxBody();  if(null==oneCTTextBody){ continue; } CTTextParagraph[]  oneCTTextParagraph= oneCTTextBody.getPArray(); CTTextFont oneCTTextFont=null; try {oneCTTextFont=CTTextFont.Factory.parse(xmlFontFormat);} catch (XmlException e) {e.printStackTrace();}  for (CTTextParagraph ctTextParagraph : oneCTTextParagraph) { CTRegularTextRun[]  onrCTRegularTextRunArray=ctTextParagraph.getRArray(); for (CTRegularTextRun ctRegularTextRun : onrCTRegularTextRunArray) { CTTextCharacterProperties  oneCTTextCharacterProperties =ctRegularTextRun.getRPr(); oneCTTextCharacterProperties.setLatin(oneCTTextFont); } }}  //创建BufferedImage 对象，图像尺寸为原来的PPT的每页尺寸  BufferedImage oneBufferedImage=new BufferedImage(onePPTPageSize.width, onePPTPageSize.height, BufferedImage.TYPE_INT_RGB); Graphics2D  oneGraphics2D = oneBufferedImage.createGraphics(); //将PPT文件中的每个页面中的相关内容画到转换后的图片中 pptPageXSLFSLiseList.get(i).draw(oneGraphics2D); /**  * 设置图片的存放路径和图片格式，注意生成的文件路径为绝对路径，最终获得各个图像文件所对应的输出流的对象  */  try { String imgName=(i+1)+"_"+UUID.randomUUID().toString()+"."+imageFormatNameString; imgNamesList.add(imgName);//将图片名称添加的集合中  orignalPPTFileOutStream=new FileOutputStream(targetImageFileDir+imgName);//orignalPPTFileOutStream=new FileOutputStream(targetImageFileDir+(i+1)+"_"+UUID.randomUUID().toString()+"."+imageFormatNameString);} catch (FileNotFoundException e) {e.printStackTrace();map.put("converReturnResult", converReturnResult);return map;}  //将转换后的各个图片文件保存带指定的目录中 try {ImageIO.write(oneBufferedImage, imageFormatNameString, orignalPPTFileOutStream);} catch (IOException e) {e.printStackTrace();map.put("converReturnResult", converReturnResult);return map;} }} finally{try {if(orignalPPTFileInputStream!=null){orignalPPTFileInputStream.close();}} catch (IOException e) {e.printStackTrace();}try {if(orignalPPTFileOutStream!=null){orignalPPTFileOutStream.close();}} catch (IOException e) {e.printStackTrace();}converReturnResult=true;map.put("converReturnResult", converReturnResult);map.put("imgNames", imgNamesList);}return map;}/** * 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 Map<String,Object> * key: converReturnResult   类型：boolean 转化结果 true 代表转换成功，false 代表转换失败 * key:imgNames  类型：List<String> 转换成功后图片的全部名称集合 * 注：获取“imgNames”图片名称集合时，请先判断“converReturnResult” 是否为true；如果有一张转换失败则为false */@SuppressWarnings("resource")public static Map<String,Object> converPPTtoImage(String orignalPPTFileName,String targetImageFileDir,String imageFormatNameString){Map<String,Object> map=new HashMap<String, Object>();boolean converReturnResult=false;//是否全部转成功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;try{try {orignalPPTFileInputStream=new FileInputStream(orignalPPTFileName);} catch (FileNotFoundException e) {e.printStackTrace();map.put("converReturnResult", converReturnResult);return map;}try {oneHSLFSlideShow=new HSLFSlideShow(orignalPPTFileInputStream);} catch (IOException e) {e.printStackTrace();map.put("converReturnResult", converReturnResult);return map;}//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 */BufferedImage oneBufferedImage=new BufferedImage(onePPTPageSize.width, onePPTPageSize.height, 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.fill(new Rectangle2D.Float(0,0,onePPTPageSize.width,onePPTPageSize.height)); 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 orignalPPTFileOutStream=new FileOutputStream(targetImageFileDir+imgName);} catch (FileNotFoundException e) {e.printStackTrace();map.put("converReturnResult", converReturnResult);return map;}/** * 转换后的图片文件保存的指定的目录中 */  try {ImageIO.write(oneBufferedImage, imageFormatNameString, orignalPPTFileOutStream);//throw new IOException();} catch (IOException e) {e.printStackTrace();map.put("converReturnResult", converReturnResult);return map;}}}finally{try {if(orignalPPTFileInputStream!=null){orignalPPTFileInputStream.close();}} catch (IOException e) {e.printStackTrace();}try {if(orignalPPTFileOutStream!=null){orignalPPTFileOutStream.close();}} catch (IOException e) {e.printStackTrace();}converReturnResult=true;map.put("converReturnResult", converReturnResult);map.put("imgNames", imgNamesList);}return map;}public static void main(String[] args) { //PPT调用示例//Map<String,Object> map=ConverPPTFileToImageUtil.converPPTtoImage("E:\\ppt\\oracle SQL语法大全(第一课).ppt", "E:\\ppt\\pptimg\\", "jpg");//PPTX调用示例Map<String,Object> map=ConverPPTFileToImageUtil.converPPTXtoImage("E:\\ppt\\PMS2.0界面设计培训-20130507.pptx", "E:\\ppt\\pptimg\\", "jpg");boolean converReturnResult=(Boolean) map.get("converReturnResult");System.out.println("converReturnResult:"+converReturnResult);if(converReturnResult){//如果全部转换成功,则为true;如果有一张转换失败,则为fasle@SuppressWarnings("unchecked")List<String> imgNames=(List<String>) map.get("imgNames");for (String imgName : imgNames) {System.out.println(imgName);}}}}