以下是一个Java实现简单浏览器预览服务端文档的例子，文档包括pdf，excel，word，ppt，思路是将excel，word转化为html；将ppt转为图片，再转为html；将pdf以pdf流的形式返回给浏览器，一般的浏览器都支持预览pdf。

maven依赖

<dependency><groupId>org.apache.poi</groupId><artifactId>ooxml-schemas</artifactId><version>1.1</version>
</dependency>
<dependency><groupId>org.apache.poi</groupId><artifactId>poi</artifactId><version>3.15</version>
</dependency>
<dependency><groupId>org.apache.poi</groupId><artifactId>poi-ooxml</artifactId><version>3.15</version>
</dependency>
<dependency><groupId>org.apache.poi</groupId><artifactId>poi-scratchpad</artifactId><version>3.15</version>
</dependency>
<dependency><groupId>fr.opensagres.xdocreport</groupId><artifactId>org.apache.poi.xwpf.converter.core</artifactId><version>1.0.4</version>
</dependency>
<dependency><groupId>fr.opensagres.xdocreport</groupId><artifactId>org.apache.poi.xwpf.converter.xhtml</artifactId><version>1.0.4</version>
</dependency>
<dependency><groupId>org.apache.xmlbeans</groupId><artifactId>xmlbeans</artifactId><version>2.5.0</version>
</dependency>

预览pdf

byte[] datas = readFile(f);
response.setContentType("application/pdf");
response.setContentLength(datas.length);
OutputStream os = res.getOutputStream();
os.write(datas, 0, datas.length);
os.flush();
os.close();

预览页面

将转为html或者图片的文档，嵌入此html中返回给浏览器展示。

private static final StringBuilder ORIGIN_HTML = new StringBuilder("<!DOCTYPE html>\n" +"<html lang=\"en\">\n" +"<head>\n" +"    <meta http-equiv=\"Content-Type\" content=\"text/html;charset=utf-8\" />\n" +"    <meta http-equiv=\"X-UA-Compatible\" content=\"IE=edge\">\n" +"    <title>预览</title>\n" +"    <link rel=\"stylesheet\" href=\"/resource/css/simple.slide.css\">\n" +"    <link rel=\"stylesheet\" href=\"/resource/css/preview.css\">\n" +"    <script type=\"text/javascript\" src=\"../../resource/jquery-1.9.0.min.js\"></script>\n" +"    <script type=\"text/javascript\" src=\"/resource/simple.slide.js\"></script>\n" +"    <script type=\"text/javascript\">\n" +"        $(function(){\n" +"           $(\".pptimage\").simpleSlide();\n" +"        });\n" +"    </script>\n" +"</head>\n" +"<body>\n" +"       ####\n" +"</body>\n" +"</html>");

word07转为html

public static void doc07ToHtml(String from, OutputStream out, String imagePath){try{Map<String, String> map = new HashMap<String, String>();//1.如果图片文件夹存在,删除重新创建之File imagePathFile = new File(imagePath);if(imagePathFile.exists()) {FileUtils.deleteDirectory(imagePathFile);}imagePathFile.mkdirs();FileInputStream fis = new FileInputStream(from);XWPFDocument doc = new XWPFDocument(fis);XHTMLOptions options = XHTMLOptions.create();options.setExtractor(new IImageExtractor() {@Overridepublic void extract(String imagePath1, byte[] imageData) throws IOException {//2.处理文件后缀String suf = "";if(imagePath1.lastIndexOf(".") > 0) {suf = imagePath1.substring(imagePath1.lastIndexOf("."), imagePath1.length());}//3.写文件，并将文件对应关系存入mapString tempFile = imagePath+File.separator+UuidUtil.getUUID()+suf;File f = new File(tempFile);FileUtils.writeByteArrayToFile(f, imageData);map.put(imagePath1, tempFile);}});options.setIgnoreStylesIfUnused(false);options.setFragment(true);options.URIResolver(new IURIResolver() {@Overridepublic String resolve(String arg0) {if(map.containsKey(arg0)) {String u = map.get(arg0);if(!XaUtil.isEmpty(u)){try {u = URLEncoder.encode(u,"ISO-8859-1");} catch (UnsupportedEncodingException e) {e.printStackTrace();}}return "/sys/filemanage/getViewImage.do?id="+u;}return arg0;}});ByteArrayOutputStream os = new ByteArrayOutputStream();XHTMLConverter.getInstance().convert(doc, os, options);byte[] datas = os.toByteArray();os.close();//处理表格没有边框String content = new String(datas,"utf-8");content = ORIGIN_HTML.toString().replaceAll("####",content);datas = content.getBytes("utf-8");out.write(datas, 0, datas.length);out.flush();out.close();}catch(Exception e){log.error("",e);}
}

word03转为html

public static void doc03ToHtml(String from, OutputStream out, String imagePath)throws Exception{try{//1.如果图片文件夹存在,删除重新创建之File imagePathFile = new File(imagePath);if(imagePathFile.exists()) {FileUtils.deleteDirectory(imagePathFile);}imagePathFile.mkdirs();FileInputStream fis = new FileInputStream(from);HWPFDocument doc = new HWPFDocument(fis);WordToHtmlConverter converter = new WordToHtmlConverter(DocumentBuilderFactory.newInstance().newDocumentBuilder().newDocument());converter.setPicturesManager(new PicturesManager() {@Overridepublic String savePicture(byte[] arg0, PictureType arg1, String arg2, float arg3, float arg4) {//2.处理文件后缀String suf = "";if(arg2.lastIndexOf(".") > 0) {suf = arg2.substring(arg2.lastIndexOf("."), arg2.length());}//3.写文件，并将文件对应关系存入mapString tempFile = imagePath+File.separator+UuidUtil.getUUID()+suf;File f = new File(tempFile);try {FileUtils.writeByteArrayToFile(f, arg0);} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}if(!XaUtil.isEmpty(tempFile)){try {tempFile = URLEncoder.encode(tempFile,"ISO-8859-1");} catch (UnsupportedEncodingException e) {e.printStackTrace();}}return "/sys/filemanage/getViewImage.do?id="+tempFile;}});converter.processDocument(doc);Document htmlDocument = converter.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();byte[] datas = outStream.toByteArray();//处理表格没有边框String content = new String(datas,"utf-8");content = ORIGIN_HTML.toString().replaceAll("####",content);datas = content.getBytes("utf-8");out.write(datas, 0, datas.length);out.flush();out.close();}catch(Exception e){log.error("",e);}
}

Excel转为html

public static void exceToHtml(String from, OutputStream out){InputStream in = null;XSSFWorkbook xwb = null;HSSFWorkbook hwb= null;try{in = new FileInputStream(from);Workbook wb = WorkbookFactory.create(in);if(wb instanceof XSSFWorkbook) {xwb = (XSSFWorkbook) wb;hwb = new HSSFWorkbook();ConvertXSSF2HSSF c = new ConvertXSSF2HSSF();c.transformXSSF(xwb, hwb);}else{hwb = (HSSFWorkbook) wb;}ExcelToHtmlConverter converter = new ExcelToHtmlConverter(DocumentBuilderFactory.newInstance().newDocumentBuilder().newDocument());converter.processWorkbook(hwb);wb.close();Document htmlDocument = converter.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(),"utf-8" );content = ORIGIN_HTML.toString().replaceAll("####",content);byte[] datas = content.getBytes("utf-8");out.write(datas,0,datas.length);out.flush();out.close();}catch (Exception e){log.error("",e);}finally {try {if(null != in){in.close();}if(null != xwb){xwb.close();}if(null != hwb){hwb.close();}} catch (IOException e) {log.error("",e);}}
}

ppt07转为图片

public static String ppt07ToImage(String from, String images) {StringBuilder sb = new StringBuilder();FileInputStream fis = null;XMLSlideShow ppt = null;FileOutputStream fos = null;try {// 1.如果图片文件夹存在,删除重新创建之File imagePathFile = new File(images);if (imagePathFile.exists()) {FileUtils.deleteDirectory(imagePathFile);}imagePathFile.mkdirs();fis = new FileInputStream(from);ppt = new XMLSlideShow(fis);Dimension pageSize = ppt.getPageSize();List<XSLFSlide> slides = ppt.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>";int index = 0;for (XSLFSlide slide : slides) {CTSlide cts = slide.getXmlObject();CTGroupShape groupShape = cts.getCSld().getSpTree();List<CTShape> shapeList = groupShape.getSpList();for (CTShape ctShape : shapeList) {CTTextBody oneCTTextBody = ctShape.getTxBody();if (null == oneCTTextBody) {continue;}CTTextParagraph[] oneCTTextParagraph = oneCTTextBody.getPArray();CTTextFont oneCTTextFont = null;oneCTTextFont = CTTextFont.Factory.parse(xmlFontFormat);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(pageSize.width, pageSize.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slides.get(index).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*/String imgName = images + File.separator + UuidUtil.getUUID() + ".jpg";sb.append(imgName + ",");fos = new FileOutputStream(imgName);ImageIO.write(oneBufferedImage, "jpg", fos);index++;}} catch (Exception e) {e.printStackTrace();}finally {try {if(null != fis) {fis.close();}if(null != ppt) {ppt.close();}if(null != fos){fos.close();}} catch (IOException e) {e.printStackTrace();}}return sb.toString();
}

ppt03转为图片

public static String ppt03ToImage(String from, String images) {StringBuilder sb = new StringBuilder();FileInputStream fis = null;FileOutputStream fos = null;HSLFSlideShow ppt = null;try {// 1.如果图片文件夹存在,删除重新创建之File imagePathFile = new File(images);if (imagePathFile.exists()) {FileUtils.deleteDirectory(imagePathFile);}imagePathFile.mkdirs();fis = new FileInputStream(from);ppt = new HSLFSlideShow(fis);// 获取PPT每页的大小（宽和高度）Dimension onePPTPageSize = ppt.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 = ppt.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");int index = HSLFTextRunList.get(j).getFontIndex();String name = HSLFTextRunList.get(j).getFontFamily();HSLFTextRunList.get(j).setFontIndex(1);HSLFTextRunList.get(j).setFontFamily("宋体");log.info("ppt info:"+HSLFTextRunList.get(j).getRawText());}}}/*** 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*/String imgName = images + File.separator + UuidUtil.getUUID() + ".jpg";sb.append(imgName);sb.append(",");fos = new FileOutputStream(imgName);/*** 图片文件保存的指定的目录中*/ImageIO.write(oneBufferedImage, "jpg", fos);}} catch (Exception e) {e.printStackTrace();} finally {try {if(null != fis) {fis.close();}if(null != ppt) {ppt.close();}if(null != fos){fos.close();}} catch (IOException e) {e.printStackTrace();}}return sb.toString();
}

（完）

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在线预览文档简单例子

maven依赖

预览pdf

预览页面

word07转为html

word03转为html

Excel转为html

ppt07转为图片

ppt03转为图片

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