poi ppt转换为html，实现在线预览

 

ppt转换为html的原理就是将ppt转换为图片

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.geom.Rectangle2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

import javax.imageio.ImageIO;

import org.apache.poi.hslf.usermodel.HSLFShape;
import org.apache.poi.hslf.usermodel.HSLFSlideShow;
import org.apache.poi.hslf.usermodel.HSLFSlideShowImpl;
import org.apache.poi.hslf.usermodel.HSLFTextParagraph;
import org.apache.poi.hslf.usermodel.HSLFTextRun;
import org.apache.poi.hslf.usermodel.HSLFTextShape;
import org.apache.poi.xslf.usermodel.XMLSlideShow;
import org.apache.poi.xslf.usermodel.XSLFShape;
import org.apache.poi.xslf.usermodel.XSLFTextParagraph;
import org.apache.poi.xslf.usermodel.XSLFTextRun;
import org.apache.poi.xslf.usermodel.XSLFTextShape;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.maiyue.base.utils.ComUtil;
import com.maiyue.base.utils.FileUtils;

/**
 * ppt转换为html
 * @author chen
 *
 */
public class POIPptToHtmlUtils {
 
 private static Logger logger = LoggerFactory.getLogger(POIPptToHtmlUtils.class);

 /**
  *
  * @param sourceFilePath
  * @param targetFolder
  * @param targetFileName
  * @return
  */
 public static String pptToHtml(String sourceFilePath, String targetFolder, String targetFileName) {
  FileUtils.createFileFolder(targetFolder);
  File pptFile = new File(sourceFilePath);
  if (pptFile.exists()) {
   try {
    String type = FileUtils.getFileSuffix(sourceFilePath);
    String targetFilePath = targetFolder + "/"+ targetFileName;
    if ("ppt".equals(type)) {
     String htmlStr = toImage2003(sourceFilePath, targetFolder);
     return FileUtils.writeToFile(htmlStr, targetFilePath, "UTF-8");
    } else if ("pptx".equals(type)) {
     String htmlStr = toImage2007(sourceFilePath, targetFolder);
     return FileUtils.writeToFile(htmlStr, targetFilePath, "UTF-8");
    } else {
     logger.error("ppt转换为html,源文件={}不是ppt文件", sourceFilePath);
     return null;
    }

   } catch (Exception e) {
    logger.error("ppt文档转换为html,发生异常,源文件={},", sourceFilePath, e);
    return null;
   }
  } else {
   logger.error("ppt文档转换为html,源文件={}不存在", sourceFilePath);
   return null;
  }
 }

 public static String toImage2007(String sourcePath, String targetDir) throws Exception {
  String htmlStr = "";
  FileInputStream is = new FileInputStream(sourcePath);
  XMLSlideShow ppt = new XMLSlideShow(is);
  is.close();
  FileUtils.createDir(targetDir);
  Dimension pgsize = ppt.getPageSize();
  String imageFileName = "ppt" + ComUtil.genUUID(3);
  StringBuffer sb = new StringBuffer();
  for (int i = 0; i < ppt.getSlides().size(); i++) {
   try {
    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 imageDir = targetDir + "/" + imageFileName + "/";
    FileUtils.createDir(imageDir);// create image dir
    // 相对路径
    String relativeImagePath = imageFileName + "/" + imageFileName + "-" + (i + 1) + ".png";
    // 绝对路径
    String imagePath = imageDir + imageFileName + "-" + (i + 1) + ".png";
    sb.append("
");
    sb.append("");
    FileOutputStream out = new FileOutputStream(imagePath);
    javax.imageio.ImageIO.write(img, "png", out);
    out.close();
   } catch (Exception e) {
    logger.error("ppt转换为html,发生异常,源文件={}", sourcePath, e);
    System.out.println("第" + i + "张ppt转换出错");
    return null;
   }
  }
  htmlStr = sb.toString();
  return htmlStr;
 }

 public static String toImage2003(String sourcePath, String targetDir) {
  String htmlStr = "";
  try {
   HSLFSlideShow ppt = new HSLFSlideShow(new HSLFSlideShowImpl(sourcePath));
   FileUtils.createDir(targetDir);
   Dimension pgsize = ppt.getPageSize();
   StringBuffer sb = new StringBuffer();
   String imageFileName = ComUtil.genUUID(5);
   for (int i = 0; i < ppt.getSlides().size(); i++) {
    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 imageDir = targetDir + "/" + imageFileName + "/";
    // create image dir
    FileUtils.createDir(imageDir);
    // 相对路径
    String relativeImagePath = imageFileName + "/" + imageFileName + "-" + (i + 1) + ".png";
    // 绝对路径
    String imagePath = imageDir + imageFileName + "-" + (i + 1) + ".png";
    sb.append("
");
    sb.append("");
    FileOutputStream out = new FileOutputStream(imagePath);
    javax.imageio.ImageIO.write(img, "png", out);
    out.close();
   }
   htmlStr = sb.toString();
  } catch (Exception e) {
   logger.error("ppt转换为html,发生异常,源文件={}", sourcePath, e);
   return null;
  }
  
  return htmlStr;
 }

 /**
  *
  * @param srcImgPath
  * @param distImgPath
  * @param width
  * @param height
  * @throws IOException
  */
 public static void resizeImage(String srcImgPath, String distImgPath, int width, int height) throws IOException {
  File srcFile = new File(srcImgPath);
  Image srcImg = ImageIO.read(srcFile);
  BufferedImage buffImg = null;
  buffImg = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
  buffImg.getGraphics().drawImage(srcImg.getScaledInstance(width, height, Image.SCALE_SMOOTH), 0, 0, null);
  ImageIO.write(buffImg, "JPEG", new File(distImgPath));
 }
 
 /*public static void main(String[] args) {
  //POIPptToHtmlUtils.pptToHtml("D:/diagnosis/file/temp//ppt2007.pptx", "D:/diagnosis/file/temp/", "test5.html");
  POIPptToHtmlUtils.pptToHtml("D:/diagnosis/file/temp//ppt2003.ppt", "D:/diagnosis/file/temp/", "test6.html");
 }*/

}