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java實(shí)現(xiàn)在線預(yù)覽--poi實(shí)現(xiàn)word、excel、ppt轉(zhuǎn)html的方法

更新時(shí)間：2019年09月16日 14:08:27 作者：yjclsx

這篇文章主要介紹了java實(shí)現(xiàn)在線預(yù)覽--poi實(shí)現(xiàn)word、excel、ppt轉(zhuǎn)html的方法，本文需要引入poi的jar包給大家介紹的非常詳細(xì),需要的朋友可以參考下

java實(shí)現(xiàn)在線預(yù)覽

- -之poi實(shí)現(xiàn)word、excel、ppt轉(zhuǎn)html，具體內(nèi)容如下所示：

###簡介

java實(shí)現(xiàn)在線預(yù)覽功能是一個(gè)大家在工作中也許會(huì)遇到的需求，如果公司有錢，直接使用付費(fèi)的第三方軟件或者云在線預(yù)覽服務(wù)就可以了，例如永中office、office web 365(http://www.officeweb365.com/)他們都有云在線預(yù)覽服務(wù)，就是要錢0.0

如果想要免費(fèi)的，可以用openoffice，還需要借助其他的工具(例如swfTools、FlexPaper等)才行，可參考這篇文章http://blog.csdn.net/z69183787/article/details/17468039，寫的挺細(xì)的，實(shí)現(xiàn)原理就是：

1.通過第三方工具openoffice，將word、excel、ppt、txt等文件轉(zhuǎn)換為pdf文件；

2.通過swfTools將pdf文件轉(zhuǎn)換成swf格式的文件；

3.通過FlexPaper文檔組件在頁面上進(jìn)行展示。

當(dāng)然如果裝了Adobe Reader XI，那把pdf直接拖到瀏覽器頁面就可以直接打開預(yù)覽，這樣就不需要步驟2、3了，前提就是客戶裝了Adobe Reader XI這個(gè)pdf閱讀器。

我這里介紹通過poi實(shí)現(xiàn)word、excel、ppt轉(zhuǎn)html，這樣就可以放在頁面上了。

###word轉(zhuǎn)html

package wordToHtml;

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.util.List;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import org.apache.commons.io.FileUtils;
import org.apache.poi.hwpf.HWPFDocument;
import org.apache.poi.hwpf.converter.PicturesManager;
import org.apache.poi.hwpf.converter.WordToHtmlConverter;
import org.apache.poi.hwpf.usermodel.Picture;
import org.apache.poi.hwpf.usermodel.PictureType;
import org.w3c.dom.Document;
public class PoiWordToHtml {
 public static void main(String[] args) throws Throwable {
 final String path = "D:\\poi-test\\wordToHtml\\";
 final String file = "人員選擇系分.doc";
 InputStream input = new FileInputStream(path + file);
 HWPFDocument wordDocument = new HWPFDocument(input);
 WordToHtmlConverter wordToHtmlConverter = new WordToHtmlConverter(
  DocumentBuilderFactory.newInstance().newDocumentBuilder()
   .newDocument());
 wordToHtmlConverter.setPicturesManager(new PicturesManager() {
  public String savePicture(byte[] content, PictureType pictureType,
   String suggestedName, float widthInches, float heightInches) {
  return suggestedName;
  }
 });
 wordToHtmlConverter.processDocument(wordDocument);
 List pics = wordDocument.getPicturesTable().getAllPictures();
 if (pics != null) {
  for (int i = 0; i < pics.size(); i++) {
  Picture pic = (Picture) pics.get(i);
  try {
   pic.writeImageContent(new FileOutputStream(path
    + pic.suggestFullFileName()));
  } catch (FileNotFoundException e) {
   e.printStackTrace();
  }
  }
 }
 Document htmlDocument = wordToHtmlConverter.getDocument();
 ByteArrayOutputStream outStream = new ByteArrayOutputStream();
 DOMSource domSource = new DOMSource(htmlDocument);
 StreamResult streamResult = new StreamResult(outStream);
 TransformerFactory tf = TransformerFactory.newInstance();
 Transformer serializer = tf.newTransformer();
 serializer.setOutputProperty(OutputKeys.ENCODING, "utf-8");
 serializer.setOutputProperty(OutputKeys.INDENT, "yes");
 serializer.setOutputProperty(OutputKeys.METHOD, "html");
 serializer.transform(domSource, streamResult);
 outStream.close();
 String content = new String(outStream.toByteArray());
 FileUtils.writeStringToFile(new File(path, "人員選擇系分.html"), content, "utf-8");
 }
}

###excel轉(zhuǎn)html

package excelToHtml;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.List;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import org.apache.commons.io.FileUtils;
import org.apache.poi.hssf.converter.ExcelToHtmlConverter;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.hwpf.converter.PicturesManager;
import org.apache.poi.hwpf.converter.WordToHtmlConverter;
import org.apache.poi.hwpf.usermodel.Picture;
import org.apache.poi.hwpf.usermodel.PictureType;
import org.w3c.dom.Document;

public class PoiExcelToHtml {
 final static String path = "D:\\poi-test\\excelToHtml\\";
 final static String file = "exportExcel.xls";
 public static void main(String args[]) throws Exception {
 
 InputStream input=new FileInputStream(path+file);
 HSSFWorkbook excelBook=new HSSFWorkbook(input);
 ExcelToHtmlConverter excelToHtmlConverter = new ExcelToHtmlConverter (DocumentBuilderFactory.newInstance().newDocumentBuilder().newDocument() );
 excelToHtmlConverter.processWorkbook(excelBook);
 List pics = excelBook.getAllPictures();
   if (pics != null) {
     for (int i = 0; i < pics.size(); i++) {
       Picture pic = (Picture) pics.get (i);
       try {
         pic.writeImageContent (new FileOutputStream (path + pic.suggestFullFileName() ) );
       } catch (FileNotFoundException e) {
         e.printStackTrace();
       }
     }
   }
   Document htmlDocument =excelToHtmlConverter.getDocument();
   ByteArrayOutputStream outStream = new ByteArrayOutputStream();
   DOMSource domSource = new DOMSource (htmlDocument);
   StreamResult streamResult = new StreamResult (outStream);
   TransformerFactory tf = TransformerFactory.newInstance();
   Transformer serializer = tf.newTransformer();
   serializer.setOutputProperty (OutputKeys.ENCODING, "utf-8");
   serializer.setOutputProperty (OutputKeys.INDENT, "yes");
   serializer.setOutputProperty (OutputKeys.METHOD, "html");
   serializer.transform (domSource, streamResult);
   outStream.close();
   String content = new String (outStream.toByteArray() );
   FileUtils.writeStringToFile(new File (path, "exportExcel.html"), content, "utf-8");
 }
}

###ppt轉(zhuǎn)html

其實(shí)只是ppt轉(zhuǎn)圖片，有了圖片后放到頁面上去，點(diǎn)擊下一頁就一張張顯示就可以了。這里只介紹ppt轉(zhuǎn)圖片的過程。

package pptToImg;
import java.awt.Dimension;  
import java.io.File;  
import java.io.FileInputStream;  
import java.io.FileNotFoundException;  
import java.io.FileOutputStream;  
import java.io.IOException;  
import java.awt.Color;  
import java.awt.Dimension;  
import java.awt.Graphics2D;  
import java.awt.geom.Rectangle2D;  
import java.awt.image.BufferedImage;  
import org.apache.poi.hslf.model.TextRun;  
import org.apache.poi.hslf.record.Slide;  
import org.apache.poi.hslf.usermodel.RichTextRun;  
import org.apache.poi.hslf.usermodel.SlideShow;  
public class PPTtoImage {  
  public static void main(String[] args) {  
    // 讀入PPT文件  
    File file = new File("D:/poi-test/pptToImg/test.ppt");  
    doPPTtoImage(file);  
  }  
  public static boolean doPPTtoImage(File file) {  
    boolean isppt = checkFile(file);  
    if (!isppt) {  
      System.out.println("The image you specify don't exit!");  
      return false;  
    }  
    try {  
      FileInputStream is = new FileInputStream(file);  
      SlideShow ppt = new SlideShow(is);  
      is.close();  
      Dimension pgsize = ppt.getPageSize();  
      org.apache.poi.hslf.model.Slide[] slide = ppt.getSlides();  
      for (int i = 0; i < slide.length; i++) {  
        System.out.print("第" + i + "頁。");  
        TextRun[] truns = slide[i].getTextRuns();   
        for ( int k=0;k<truns.length;k++){   
          RichTextRun[] rtruns = truns[k].getRichTextRuns();   
         for(int l=0;l<rtruns.length;l++){   
            int index = rtruns[l].getFontIndex();   
            String name = rtruns[l].getFontName();        
            rtruns[l].setFontIndex(1);   
            rtruns[l].setFontName("宋體"); 
//            System.out.println(rtruns[l].getText());
          }   
        }   
        BufferedImage img = new BufferedImage(pgsize.width,pgsize.height, BufferedImage.TYPE_INT_RGB);  
        Graphics2D graphics = img.createGraphics();  
        graphics.setPaint(Color.BLUE);  
        graphics.fill(new Rectangle2D.Float(0, 0, pgsize.width, pgsize.height));  
        slide[i].draw(graphics);  
        // 這里設(shè)置圖片的存放路徑和圖片的格式(jpeg,png,bmp等等),注意生成文件路徑  
        FileOutputStream out = new FileOutputStream("D:/poi-test/pptToImg/pict_"+ (i + 1) + ".jpeg");  
        javax.imageio.ImageIO.write(img, "jpeg", out);  
        out.close();  
      }  
      System.out.println("success!!");  
      return true;  
    } catch (FileNotFoundException e) {  
      System.out.println(e);  
      // System.out.println("Can't find the image!");  
    } catch (IOException e) {  
    }  
    return false;  
  }  
  // function 檢查文件是否為PPT  
  public static boolean checkFile(File file) {  
    boolean isppt = false;  
    String filename = file.getName();  
    String suffixname = null;  
    if (filename != null && filename.indexOf(".") != -1) {  
      suffixname = filename.substring(filename.indexOf("."));  
      if (suffixname.equals(".ppt")) {  
        isppt = true;  
      }  
      return isppt;  
    } else {  
      return isppt;  
    }  
  }  
}

ppt轉(zhuǎn)圖片有個(gè)缺陷，就是ppt里不是宋體的字有些可能會(huì)變成框框。

以上都需要引入poi的jar包。

要實(shí)現(xiàn)在線預(yù)覽，只需把轉(zhuǎn)換得到的html在新標(biāo)簽頁打開或者鑲嵌到某塊區(qū)域就可以展現(xiàn)了。

總結(jié)

以上所述是小編給大家介紹的java實(shí)現(xiàn)在線預(yù)覽--poi實(shí)現(xiàn)word、excel、ppt轉(zhuǎn)html的方法,希望對(duì)大家有所幫助，如果大家有任何疑問請(qǐng)給我留言，小編會(huì)及時(shí)回復(fù)大家的。在此也非常感謝大家對(duì)腳本之家網(wǎng)站的支持！
如果你覺得本文對(duì)你有幫助，歡迎轉(zhuǎn)載，煩請(qǐng)注明出處，謝謝！

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