#Java使用poi将office文件转为html ##一、前言 功能需求：上传office文档，并提供文件在线预览。
解决方案：
- 使用Aspose.cells.jar包，将文档转换为pdf格式；
- 使用libreOffice，将文档转换为pdf格式；
- 使用poi将文档转换为html格式。
方案一，通过Aspose的方式，该功能是付费版，需要破解，所以是能抛弃。 方案二，使用libreOffice,需要安装使用libreOffice，linux还需要装unoconv，需要使用commons-io的pom依赖，之前maven官方库查询不到这个pom依赖所以放弃了这个方案，刚才准备查询资料时发现这个依赖已经可以使用，估计是前段时间maven官方库出现问题。 方案三，只需要添加所需的依赖就可以使用，但是转换出的html会有一些格式问题，等下会再下面讲到。
二、添加依赖
<dependencies>
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi</artifactId>
<version>3.12</version>
</dependency>
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-scratchpad</artifactId>
<version>3.12</version>
</dependency>
<dependency>
<groupId>fr.opensagres.xdocreport</groupId>
<artifactId>fr.opensagres.xdocreport.document</artifactId>
<version>1.0.5</version>
</dependency>
<dependency>
<groupId>fr.opensagres.xdocreport</groupId>
<artifactId>org.apache.poi.xwpf.converter.xhtml</artifactId>
<version>1.0.4</version>
</dependency>
<dependency>
<groupId>fr.opensagres.xdocreport</groupId>
<artifactId>fr.opensagres.xdocreport.core</artifactId>
<version>2.0.1</version>
</dependency>
</dependencies>
三、word文档转html
一般word文件后缀有doc、docx两种。docx是word2007以及以后版本文档的扩展名，doc是word2003文档保存的扩展名。对于这两种格式的word转换成html需要使用不同的方法。
1、转换问题： 转换后，对于2003版本word,自动生成的目录会显示有错误；2003版本和2007版本对于特殊字符都有可能显示不出来，不过问题不是很明显；文章中的图片一定要是常用的图片格式（jpeg,jpg,png等），不然无法显示。
2、2003版本word转换成html（.doc）
public static boolean word2003ToHtml(Map params) {
logger.debug("***** word2003ToHtml start params:{}", params);
try {
//图片存放路径
String fileImg = params.get("fileImg").toString();
//转换html后，html中图片的url前缀
String viewImgPath = params.get("viewImgPath").toString();
//html文件
File htmlFile = new File(params.get("htmlFile").toString());
File file = new File(params.get("filePath").toString() + params.get("FILE_NAME").toString());
// 1) 加载word文档生成 HWPFDocument对象
InputStream inputStream = new FileInputStream(file);
HWPFDocument wordDocument = new HWPFDocument(inputStream);
WordToHtmlConverter wordToHtmlConverter =
new WordToHtmlConverter(DocumentBuilderFactory.newInstance().newDocumentBuilder().newDocument());
//设置图片存放的位置
wordToHtmlConverter.setPicturesManager(new PicturesManager() {
public String savePicture(byte[] content, PictureType pictureType, String suggestedName, float widthInches, float heightInches) {
File imgPath = new File(fileImg);
if (!imgPath.exists()) {//图片目录不存在则创建
imgPath.mkdirs();
}
File file = new File(fileImg + suggestedName);
try {
OutputStream os = new FileOutputStream(file);
os.write(content);
os.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
//这里可以指定word文档中图片的路径。
return viewImgPath + "/" + suggestedName;
}
});
//解析word文档
wordToHtmlConverter.processDocument(wordDocument);
Document htmlDocument = wordToHtmlConverter.getDocument();
OutputStream outputStream = new FileOutputStream(htmlFile);
DOMSource domSource = new DOMSource(htmlDocument);
StreamResult streamResult = new StreamResult(outputStream);
TransformerFactory factory = TransformerFactory.newInstance();
Transformer serializer = factory.newTransformer();
serializer.setOutputProperty(OutputKeys.ENCODING, "utf-8");
serializer.setOutputProperty(OutputKeys.INDENT, "yes");
serializer.setOutputProperty(OutputKeys.METHOD, "html");
serializer.transform(domSource, streamResult);
outputStream.close();
} catch (Exception e) {
e.printStackTrace();
return false;
}
return true;
}
3、2007版本word转换成html（.docx）
public static boolean word2007ToHtml(Map params) throws Exception {
logger.debug("***** word2007ToHtml start params:{}", params);
try {
//转换html后，html中图片的url前缀
String viewImgPath = params.get("viewImgPath").toString();
//图片存放路径
String fileImg = params.get("fileImg").toString();
File file = new File(params.get("filePath").toString() + params.get("FILE_NAME").toString());
// 1) 加载word文档生成 XWPFDocument对象
InputStream inputStream = new FileInputStream(file);
XWPFDocument document = new XWPFDocument(inputStream);
// 2) 解析 XHTML配置 (URIResolver来设置图片存放的目录)
XHTMLOptions options = XHTMLOptions.create();
options.URIResolver(new BasicURIResolver(viewImgPath));
FileImageExtractor extractor = new FileImageExtractor(new File(fileImg));
options.setExtractor(extractor);
// 3) 将 XWPFDocument转换成XHTML
File htmlFile = new File(params.get("htmlFile").toString());
OutputStream outputStream = new FileOutputStream(htmlFile);
XHTMLConverter.getInstance().convert(document, outputStream, options);
} catch (Exception e) {
e.printStackTrace();
return false;
}
return true;
}
四、Excel文档转Html
POI中将Excel转换为HTML方法仅能转换HSSFWorkBook类型（即03版xls），故可以先将读取的xlsx文件转换成xls文件再调用该方法统一处理
1、2003版本excel转换html(excel中不可包括图片，因为poi没提供将excel中图片转换的方法)
public static boolean excelToHtml(Map params) {
try {
String file = params.get("FILE_NAME").toString();
String filePath = params.get("filePath").toString() + file;
InputStream input = new FileInputStream(filePath);
HSSFWorkbook excelBook = new HSSFWorkbook();
//判断Excel文件将07+版本转换为03版本
if (file.endsWith(EXCEL_XLS)) { //Excel 2003
excelBook = new HSSFWorkbook(input);
} else if (file.endsWith(EXCEL_XLSX)) { // Excel 2007/2010
ExcelTransFormUtil xls = new ExcelTransFormUtil();
XSSFWorkbook workbookOld = new XSSFWorkbook(input);
xls.transformXSSF(workbookOld, excelBook);
}
ExcelToHtmlConverter excelToHtmlConverter = new ExcelToHtmlConverter(DocumentBuilderFactory.newInstance().newDocumentBuilder().newDocument());
//去掉Excel头行
excelToHtmlConverter.setOutputColumnHeaders(false);
//去掉Excel行号
excelToHtmlConverter.setOutputRowNumbers(false);
excelToHtmlConverter.processWorkbook(excelBook);
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(params.get("htmlFile").toString()), content, "UTF-8");
} catch (Exception e) {
e.printStackTrace();
return false;
}
return true;
}
2、将2007版本转换成2003版本
public void transformXSSF(XSSFWorkbook workbookOld, HSSFWorkbook workbookNew) {
HSSFSheet sheetNew;
XSSFSheet sheetOld;
workbookNew.setMissingCellPolicy(workbookOld.getMissingCellPolicy());
for (int i = 0; i < workbookOld.getNumberOfSheets(); i++) {
sheetOld = workbookOld.getSheetAt(i);
sheetNew = workbookNew.getSheet(sheetOld.getSheetName());
sheetNew = workbookNew.createSheet(sheetOld.getSheetName());
this.transform(workbookOld, workbookNew, sheetOld, sheetNew);
}
}
private void transform(XSSFWorkbook workbookOld, HSSFWorkbook workbookNew,
XSSFSheet sheetOld, HSSFSheet sheetNew) {
sheetNew.setDisplayFormulas(sheetOld.isDisplayFormulas());
sheetNew.setDisplayGridlines(sheetOld.isDisplayGridlines());
sheetNew.setDisplayGuts(sheetOld.getDisplayGuts());
sheetNew.setDisplayRowColHeadings(sheetOld.isDisplayRowColHeadings());
sheetNew.setDisplayZeros(sheetOld.isDisplayZeros());
sheetNew.setFitToPage(sheetOld.getFitToPage());
sheetNew.setHorizontallyCenter(sheetOld.getHorizontallyCenter());
sheetNew.setMargin(Sheet.BottomMargin,
sheetOld.getMargin(Sheet.BottomMargin));
sheetNew.setMargin(Sheet.FooterMargin,
sheetOld.getMargin(Sheet.FooterMargin));
sheetNew.setMargin(Sheet.HeaderMargin,
sheetOld.getMargin(Sheet.HeaderMargin));
sheetNew.setMargin(Sheet.LeftMargin,
sheetOld.getMargin(Sheet.LeftMargin));
sheetNew.setMargin(Sheet.RightMargin,
sheetOld.getMargin(Sheet.RightMargin));
sheetNew.setMargin(Sheet.TopMargin, sheetOld.getMargin(Sheet.TopMargin));
sheetNew.setPrintGridlines(sheetNew.isPrintGridlines());
sheetNew.setRightToLeft(sheetNew.isRightToLeft());
sheetNew.setRowSumsBelow(sheetNew.getRowSumsBelow());
sheetNew.setRowSumsRight(sheetNew.getRowSumsRight());
sheetNew.setVerticallyCenter(sheetOld.getVerticallyCenter());
HSSFRow rowNew;
for (Row row : sheetOld) {
rowNew = sheetNew.createRow(row.getRowNum());
if (rowNew != null)
this.transform(workbookOld, workbookNew, (XSSFRow) row, rowNew);
}
for (int i = 0; i < this.lastColumn; i++) {
sheetNew.setColumnWidth(i, sheetOld.getColumnWidth(i));
sheetNew.setColumnHidden(i, sheetOld.isColumnHidden(i));
}
for (int i = 0; i < sheetOld.getNumMergedRegions(); i++) {
CellRangeAddress merged = sheetOld.getMergedRegion(i);
sheetNew.addMergedRegion(merged);
}
}
private void transform(XSSFWorkbook workbookOld, HSSFWorkbook workbookNew,
XSSFRow rowOld, HSSFRow rowNew) {
HSSFCell cellNew;
rowNew.setHeight(rowOld.getHeight());
for (Cell cell : rowOld) {
cellNew = rowNew.createCell(cell.getColumnIndex(),
cell.getCellType());
if (cellNew != null)
this.transform(workbookOld, workbookNew, (XSSFCell) cell,
cellNew);
}
this.lastColumn = Math.max(this.lastColumn, rowOld.getLastCellNum());
}
private void transform(XSSFWorkbook workbookOld, HSSFWorkbook workbookNew,
XSSFCell cellOld, HSSFCell cellNew) {
cellNew.setCellComment(cellOld.getCellComment());
Integer hash = cellOld.getCellStyle().hashCode();
if (this.styleMap != null && !this.styleMap.containsKey(hash)) {
this.transform(workbookOld, workbookNew, hash,
cellOld.getCellStyle(),
(HSSFCellStyle) workbookNew.createCellStyle());
}
cellNew.setCellStyle(this.styleMap.get(hash));
switch (cellOld.getCellType()) {
case Cell.CELL_TYPE_BLANK:
break;
case Cell.CELL_TYPE_BOOLEAN:
cellNew.setCellValue(cellOld.getBooleanCellValue());
break;
case Cell.CELL_TYPE_ERROR:
cellNew.setCellValue(cellOld.getErrorCellValue());
break;
case Cell.CELL_TYPE_FORMULA:
cellNew.setCellValue(cellOld.getCellFormula());
break;
case Cell.CELL_TYPE_NUMERIC:
cellNew.setCellValue(cellOld.getNumericCellValue());
break;
case Cell.CELL_TYPE_STRING:
cellNew.setCellValue(cellOld.getStringCellValue());
break;
default:
}
}
private void transform(XSSFWorkbook workbookOld, HSSFWorkbook workbookNew,
Integer hash, XSSFCellStyle styleOld, HSSFCellStyle styleNew) {
styleNew.setAlignment(styleOld.getAlignment());
styleNew.setBorderBottom(styleOld.getBorderBottom());
styleNew.setBorderLeft(styleOld.getBorderLeft());
styleNew.setBorderRight(styleOld.getBorderRight());
styleNew.setBorderTop(styleOld.getBorderTop());
styleNew.setDataFormat(this.transform(workbookOld, workbookNew,
styleOld.getDataFormat()));
styleNew.setFillBackgroundColor(styleOld.getFillBackgroundColor());
styleNew.setFillForegroundColor(styleOld.getFillForegroundColor());
styleNew.setFillPattern(styleOld.getFillPattern());
styleNew.setFont(this.transform(workbookNew,
(XSSFFont) styleOld.getFont()));
styleNew.setHidden(styleOld.getHidden());
styleNew.setIndention(styleOld.getIndention());
styleNew.setLocked(styleOld.getLocked());
styleNew.setVerticalAlignment(styleOld.getVerticalAlignment());
styleNew.setWrapText(styleOld.getWrapText());
this.styleMap.put(hash, styleNew);
}
private short transform(XSSFWorkbook workbookOld, HSSFWorkbook workbookNew,
short index) {
DataFormat formatOld = workbookOld.createDataFormat();
DataFormat formatNew = workbookNew.createDataFormat();
return formatNew.getFormat(formatOld.getFormat(index));
}
private HSSFFont transform(HSSFWorkbook workbookNew, XSSFFont fontOld) {
HSSFFont fontNew = workbookNew.createFont();
fontNew.setBoldweight(fontOld.getBoldweight());
fontNew.setCharSet(fontOld.getCharSet());
fontNew.setColor(fontOld.getColor());
fontNew.setFontName(fontOld.getFontName());
fontNew.setFontHeight(fontOld.getFontHeight());
fontNew.setItalic(fontOld.getItalic());
fontNew.setStrikeout(fontOld.getStrikeout());
fontNew.setTypeOffset(fontOld.getTypeOffset());
fontNew.setUnderline(fontOld.getUnderline());
return fontNew;
} 手动捂脸，有点太多了。大家凑合着看。。。
五、PPT文档转Html
就是将ppt转换成一张张图片再放入html。
注： (1)ppt中文字会有中文显示问题，可以将中文文字库加入到服务器中即可。 (2)pptx2007版本文件不能显示表格
1、2003版本ppt转html
public static boolean ppt2003Tohtml(Map params) {
try {
String imgPath = params.get("fileImg").toString();
File file = new File(params.get("filePath").toString() + params.get("FILE_NAME").toString());
InputStream inputStream = new FileInputStream(file);
SlideShow ppt = new SlideShow(inputStream);
inputStream.close();
Dimension pgsize = ppt.getPageSize();
org.apache.poi.hslf.model.Slide[] slide = ppt.getSlides();
FileOutputStream out = null;
String imghtml = "";
String viewImgPath = params.get("viewImgPath").toString();
for (int i = 0; i < slide.length; i++) {
logger.debug("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++) {
rtruns[l].setFontIndex(1);
rtruns[l].setFontName("宋体");
}
}
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)
out = new FileOutputStream(imgPath + (i + 1) + ".jpeg");
javax.imageio.ImageIO.write(img, "jpeg", out);
//图片在html加载路径
String imgs = viewImgPath + "/" + (i + 1) + ".jpeg";
imghtml += "<img src=\'" + imgs + "\' style=\'width:960px;height:530px;vertical-align:text-bottom;\'><br><br><br><br>";
DOMSource domSource = new DOMSource();
StreamResult streamResult = new StreamResult(out);
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);
out.close();
String ppthtml = "<html><head><META http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\"></head><body>" + imghtml + "</body></html>";
FileUtils.writeStringToFile(new File(params.get("htmlFile").toString()), ppthtml, "utf-8");
}
} catch (Exception e) {
e.printStackTrace();
return false;
}
return true;
}
2、2007版本ppt转换html
public static boolean ppt2007Tohtml(Map params) {
try {
String imgPath = params.get("fileImg").toString();
File file = new File(params.get("filePath").toString() + params.get("FILE_NAME").toString());
InputStream inputStream = new FileInputStream(file);
XMLSlideShow ppt = new XMLSlideShow(inputStream);
inputStream.close();
Dimension pgsize = ppt.getPageSize();
XSLFSlide[] pptPageXSLFSLiseList = ppt.getSlides();
FileOutputStream out = null;
String imghtml = "";
String viewImgPath = params.get("viewImgPath").toString();
for (int i = 0; i < pptPageXSLFSLiseList.length; i++) {
try {
for (XSLFShape shape : pptPageXSLFSLiseList[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
pptPageXSLFSLiseList[i].draw(graphics);
//
String Imgname = imgPath + (i + 1) + ".jpeg";
out = new FileOutputStream(Imgname);
javax.imageio.ImageIO.write(img, "jpeg", out);
//图片在html加载路径
String imgs = viewImgPath + "/" + (i + 1) + ".jpeg";
imghtml += "<img src=\'" + imgs + "\' style=\'width:960px;height:530px;vertical-align:text-bottom;\'><br><br><br><br>";
} catch (Exception e) {
System.out.println(e);
System.out.println("第" + i + "张ppt转换出错");
}
}
DOMSource domSource = new DOMSource();
StreamResult streamResult = new StreamResult(out);
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);
out.close();
String ppthtml = "<html><head><META http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\"></head><body>" + imghtml + "</body></html>";
FileUtils.writeStringToFile(new File(params.get("htmlFile").toString()), ppthtml, "utf-8");
} catch (Exception e) {
e.printStackTrace();
return false;
}
return true;
}
六、预览
1、每次预览将源文件转换成html后，将html文件上传nginx服务器目录下，用nginx代理访问，以防出现浏览器缓存问题。 我这里是将html文件和图片路径打包，通过sftp上传nginx服务器，然后解压。 2、使用iframe标签访问html文件。这里需要注意的是预览pdf文件，会出现下载打印的按钮，如果需求是文件只可缓存不可下载，就不可以使用iframe标签预览pdf。