java 实现在线预览--poi 实现word 、excel 、ppt 转html
java 实现在线预览
- -之poi 实现word 、excel 、ppt 转html
###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;l.parsers.DocumentBuilderFactory;l.transform.OutputKeys;l.transform.Transformer;l.transform.TransformerFactory;l.transform.dom.DOMSource;l.transform.stream.StreamResult;import org.apachemons.io.FileUtils;import org.apache.poi.hwpf.HWPFDocument;import org.apache.verter.PicturesManager;import org.apache.verter.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 HWPFD
ocument(input); WordToHtmlConverter wordToHtmlConverter = new WordToHtmlConverter( wInstance().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 = PicturesTable().getAllPictures(); if (pics != null) { for (int i = 0; i < pics.size(); i++) { Picture pic = (Picture) (i); try { pic.writeImageContent(new FileOutputStream(path + pic.suggestFullFileName())); } catch (FileNotFoundException e) { e.printStackTrace(); } } } Document htmlDocument = Document(); ByteArrayOutputStream outStream = new ByteArrayOutputStream(); DOMSource domSource = new DOMSource(htmlDocument); StreamResult streamResult = new StreamResult(outStream); TransformerFactory tf = wInstance(); Transformer serializer = tf.newTransformer();
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###excel转html Transformer serializer = tf.newTransformer(); serializer.setOutputProperty(OutputKeys.ENCODING, "utf-8"); serializer.setOutputProperty(OutputKeys.INDENT, "yes"); serializer.setOutputProperty(OutputKeys.
METHOD, "html"); ansform(domSource, streamResult); outStream.close(); String content = new ByteArray()); FileUtils.writeStringToFile(new File(path, "⼈员选择系分.html"), content, "utf-8"); }}
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65package 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;l.parsers.DocumentBuilderFactory;l.transform.OutputKeys;l.transform.Transformer;l.transform.TransformerFactory;l.transform.dom.DOMSource;l.transform.stream.StreamResult;import org.apachemons.io.FileUtils;import org.apache.verter.ExcelToHtmlConverter;import org.apache.poi.hssf.usermodel.HSSFWorkbook;import org.apache.verter.PicturesManager;import org.apache.verter.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 (wInstance().newDocumentBuilder().newDocume
excelToHtmlConverter.processWorkbook(excelBook); List pics = AllPictures(); if (pics != null) { for (int i = 0; i < pics.size(); i++) { Picture pic = (Picture) (i); try { pic.writeImageContent (new FileOutputStream (path + pic.suggestFullFileName() ) ); } catch (FileNotFoundException e) { e.printStackTrace(); } } } Document htmlDocument =Document(); ByteArrayOutputStream outStream = new ByteArrayOutputStream();1
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###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。 ByteArrayOutputStream outStream = new ByteArrayOutputStream(); DOMSource domSource = new DOMSource (htmlDocument); StreamResult streamResult = new StreamResult (outStream); TransformerFactory tf = wInstance(); Transformer serializer = tf.newTransformer(); serializer.setOutputProperty (OutputKeys.ENCODING, "utf-8"); serializer.setOutputProperty (OutputKeys.INDENT, "yes"); serializer.setOutputProperty (OutputKeys.METHOD, "html"); ansform (domSource, streamResult); outStream.close(); String content = new String (ByteArray() ); FileUtils.writeStringToFile(new File (path, "exportExcel.html"), content, "utf-8"); }}
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65package 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
om.Rectangle2D; import java.awt.image.BufferedImage; import org.apache.del.TextRun; import org.apache.d.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 = PageSize(); org.apache.del.Slide[] slide = Slides(); for (int i = 0; i < slide.length; i++) { System.out.print("第" + i + "页。");
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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。 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 = ateGraphics(); 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 = Name(); 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; } } }
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html document是什么
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