java实现在线预览--poi实现word、excel、ppt转html

简介: java实现在线预览 - -之poi实现word、excel、ppt转html 简介 java实现在线预览功能是一个大家在工作中也许会遇到的需求, 如果想要免费的,可以用openoffice,还需要借助其他的工具(例如swfTools、FlexPaper等)才行

java实现在线预览

- -之poi实现word、excel、ppt转html

简介

java实现在线预览功能是一个大家在工作中也许会遇到的需求,
如果想要免费的,可以用openoffice,还需要借助其他的工具(例如swfTools、FlexPaper等)才行,可参考这篇文章http://www.bieryun.com/592.html,写的挺细的,实现原理就是:
1.通过第三方工具openoffice,将word、excel、ppt、txt等文件转换为pdf文件;
2.通过swfTools将pdf文件转换成swf格式的文件;
3.通过FlexPaper文档组件在页面上进行展示。


当然如果装了Adobe Reader XI,那把pdf直接拖到浏览器页面就可以直接打开预览,这样就不需要步骤2、3了,前提就是客户装了Adobe Reader XI这个pdf阅读器。
我这里介绍通过poi实现word、excel、ppt转html,这样就可以放在页面上了。

word转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 = "人员选择系分.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, "人员选择系分.html"), content, "utf-8");
 }
}
  • 1

excel转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");
 }
}
  • 1

ppt转html

其实只是ppt转图片,有了图片后放到页面上去,点击下一页就一张张显示就可以了。这里只介绍ppt转图片的过程。

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) {   
        // 读入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 + "页。");   

                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("宋体");  
//                        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);   

                // 这里设置图片的存放路径和图片的格式(jpeg,png,bmp等等),注意生成文件路径   
                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 检查文件是否为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;   
        }   
    }   

}  
  • 1

ppt转图片有个缺陷,就是ppt里不是宋体的字有些可能会变成框框。
以上都需要引入poi的jar包。
要实现在线预览,只需把转换得到的html在新标签页打开或者镶嵌到某块区域就可以展现了。

原文地址http://www.bieryun.com/595.html

相关文章
|
28天前
|
Java
java生成word(使用Poi-tl)
java生成word(使用Poi-tl)
81 0
|
5天前
|
JavaScript Java
Java 将Markdown文件转换为Word和PDF文档
【7月更文挑战第5天】Java中使用`Spire.Doc for Java`库可方便地将Markdown转换为Word或PDF。基本步骤包括导入模块,创建`Document`对象,加载Markdown文件,然后保存为目标格式(`.docx`或`.pdf`)。若遇到`Invalid UTF-8 stream`错误,需确保Markdown文件是UTF-8无BOM编码。页面设置可通过`PageSetup`类调整。注意,实际应用会依据具体需求和环境有所调整。
|
1月前
使用LabVIEW打开默认应用程序中的文档(PDF,Word,Excel,Html)
使用LabVIEW的&quot;Open a Document on Disk.vi&quot;,存于&lt;LabVIEW&gt;\vi.lib\Platform\browser.llb,可让默认应用打开硬盘文档。此VI仅基础打开功能,高级控制推荐LabVIEW Report Generation Toolkit或ActiveX。注意:避免版本升级问题,最好将VI复制到vi.lib外的目录。
|
2月前
|
Java Apache
Java将word、excel文件转成pdf文件
【5月更文挑战第26天】Java将word、excel文件转成pdf文件
485 1
|
1月前
|
JavaScript Java Apache
Java--office(word......)在线预览(openoffice+swfTools+FlexPaper)
Java--office(word......)在线预览(openoffice+swfTools+FlexPaper)
37 0
|
1月前
|
Java Maven
Java在线预览(word转html)--强势推荐
Java在线预览(word转html)--强势推荐
35 0
|
2月前
|
Java
java导出word
java导出word
|
15天前
|
前端开发 UED
使用HTML和CSS创建响应式表格
在网页设计中,表格是一种组织和展示数据的有效方式。本文档将指导你如何使用HTML和CSS来创建一个既美观又响应式的表格,以便在不同设备和屏幕尺寸上都能良好显示。我们将涵盖基础的HTML表格结构,样式美化以及如何实现响应式布局,使得表格内容在小屏设备上也能清晰阅读
57 0
|
19天前
|
前端开发 JavaScript
文本,wangEditor5展示HTML无样式,wangEditor5如何看源码,Ctrl + U看CSS文件,代码高亮,Prism.js可以实现,解决方法,参考网页源代码的写法
文本,wangEditor5展示HTML无样式,wangEditor5如何看源码,Ctrl + U看CSS文件,代码高亮,Prism.js可以实现,解决方法,参考网页源代码的写法
|
21天前
|
前端开发 JavaScript
【HTML+CSS+JavaScript】Animated Navigation
【HTML+CSS+JavaScript】Animated Navigation
12 0