java在线预览txt、word、ppt、execel，pdf代码详解编程语言

url = new URL(urlReal); httpUrl = (HttpURLConnection) url.openConnection();// 连接指定的资源 httpUrl.connect();// 获取网络输入流 bis = new BufferedInputStream(httpUrl.getInputStream()); String bodyText = null; WordExtractor ex = new WordExtractor(bis); bodyText = ex.getText(); response.getWriter().write(bodyText); excel： BufferedInputStream bis = null; URL url = null; HttpURLConnection httpUrl = null; // 建立链接 url = new URL(urlReal); httpUrl = (HttpURLConnection) url.openConnection();// 连接指定的资源 httpUrl.connect();// 获取网络输入流 bis = new BufferedInputStream(httpUrl.getInputStream()); content = new StringBuffer(); HSSFWorkbook workbook = new HSSFWorkbook(bis); for (int numSheets = 0; numSheets workbook.getNumberOfSheets(); numSheets++) { HSSFSheet aSheet = workbook.getSheetAt(numSheets);// 获得一个sheet content.append("/n"); if (null == aSheet) { continue; for (int rowNum = 0; rowNum = aSheet.getLastRowNum(); rowNum++) { content.append("/n"); HSSFRow aRow = aSheet.getRow(rowNum); if (null == aRow) { continue; for (short cellNum = 0; cellNum = aRow.getLastCellNum(); cellNum++) { HSSFCell aCell = aRow.getCell(cellNum); if (null == aCell) { continue; if (aCell.getCellType() == HSSFCell.CELL_TYPE_STRING) { content.append(aCell.getRichStringCellValue() .getString()); } else if (aCell.getCellType() == HSSFCell.CELL_TYPE_NUMERIC) { boolean b = HSSFDateUtil.isCellDateFormatted(aCell); if (b) { Date date = aCell.getDateCellValue(); SimpleDateFormat df = new SimpleDateFormat( "yyyy-MM-dd"); content.append(df.format(date)); response.getWriter().write(content.toString()); ppt： BufferedInputStream bis = null; URL url = null; HttpURLConnection httpUrl = null; // 建立链接 url = new URL(urlReal); httpUrl = (HttpURLConnection) url.openConnection();// 连接指定的资源 httpUrl.connect();// 获取网络输入流 bis = new BufferedInputStream(httpUrl.getInputStream()); StringBuffer content = new StringBuffer(""); SlideShow ss = new SlideShow(new HSLFSlideShow(bis)); Slide[] slides = ss.getSlides(); for (int i = 0; i slides.length; i++) { TextRun[] t = slides[i].getTextRuns(); for (int j = 0; j t.length; j++) { content.append(t[j].getText()); content.append(slides[i].getTitle()); response.getWriter().write(content.toString()); pdf： BufferedInputStream bis = null; URL url = null; HttpURLConnection httpUrl = null; // 建立链接 url = new URL(urlReal); httpUrl = (HttpURLConnection) url.openConnection();// 连接指定的资源 httpUrl.connect();// 获取网络输入流 bis = new BufferedInputStream(httpUrl.getInputStream()); PDDocument pdfdocument = null; PDFParser parser = new PDFParser(bis); parser.parse(); pdfdocument = parser.getPDDocument(); ByteArrayOutputStream out = new ByteArrayOutputStream(); OutputStreamWriter writer = new OutputStreamWriter(out); PDFTextStripper stripper = new PDFTextStripper(); stripper.writeText(pdfdocument.getDocument(), writer); writer.close(); byte[] contents = out.toByteArray(); String ts = new String(contents); response.getWriter().write(ts); txt： BufferedReader bis = null; URL url = null; HttpURLConnection httpUrl = null; // 建立链接 url = new URL(urlReal); httpUrl = (HttpURLConnection) url.openConnection();// 连接指定的资源 httpUrl.connect();// 获取网络输入流 bis = new BufferedReader( new InputStreamReader(httpUrl.getInputStream())); StringBuffer buf=new StringBuffer(); String temp; while ((temp = bis.readLine()) != null) { buf.append(temp); response.getWriter().write(temp); if(buf.length() =1000){ break; bis.close();

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