java文档浏览器 java在线浏览word

java通过url在线预览Word、excel、ppt、pdf、txt文档中的内容【只获得其中的文字】

在页面上显示各种文档中的内容。在servlet中的逻辑

word： 

1 BufferedInputStream bis = null;
 2   URL url = null;
 3   HttpURLConnection httpUrl = null; // 建立链接
 4   url = new URL(urlReal);
 5   httpUrl = (HttpURLConnection) url.openConnection();// 连接指定的资源
 6   httpUrl.connect();// 获取网络输入流
 7   bis = new BufferedInputStream(httpUrl.getInputStream());
 8   String bodyText = null;
 9   WordExtractor ex = new WordExtractor(bis);
10   bodyText = ex.getText();
11   response.getWriter().write(bodyText);

excel：

1 BufferedInputStream bis = null;
 2   URL url = null;
 3   HttpURLConnection httpUrl = null; // 建立链接
 4   url = new URL(urlReal);
 5   httpUrl = (HttpURLConnection) url.openConnection();// 连接指定的资源
 6   httpUrl.connect();// 获取网络输入流
 7   bis = new BufferedInputStream(httpUrl.getInputStream());  
 8 content = new StringBuffer();
 9   HSSFWorkbook workbook = new HSSFWorkbook(bis);
10   for (int numSheets = 0; numSheets < workbook.getNumberOfSheets(); numSheets++) {
11    HSSFSheet aSheet = workbook.getSheetAt(numSheets);// 获得一个sheet
12    content.append("/n");
13    if (null == aSheet) {
14     continue;
15    }
16    for (int rowNum = 0; rowNum <= aSheet.getLastRowNum(); rowNum++) {
17     content.append("/n");
18     HSSFRow aRow = aSheet.getRow(rowNum);
19     if (null == aRow) {
20      continue;
21     }
22     for (short cellNum = 0; cellNum <= aRow.getLastCellNum(); cellNum++) {
23      HSSFCell aCell = aRow.getCell(cellNum);
24      if (null == aCell) {
25       continue;
26      }
27      if (aCell.getCellType() == HSSFCell.CELL_TYPE_STRING) {
28       content.append(aCell.getRichStringCellValue()
29         .getString());
30      } else if (aCell.getCellType() == HSSFCell.CELL_TYPE_NUMERIC) {
31       boolean b = HSSFDateUtil.isCellDateFormatted(aCell);
32       if (b) {
33        Date date = aCell.getDateCellValue();
34        SimpleDateFormat df = new SimpleDateFormat(
35          "yyyy-MM-dd");
36        content.append(df.format(date));
37       }
38      }
39     }
40    }
41   }
42   response.getWriter().write(content.toString());

ppt：

1 BufferedInputStream bis = null;
 2   URL url = null;
 3   HttpURLConnection httpUrl = null; // 建立链接
 4   url = new URL(urlReal);
 5   httpUrl = (HttpURLConnection) url.openConnection();// 连接指定的资源
 6   httpUrl.connect();// 获取网络输入流
 7   bis = new BufferedInputStream(httpUrl.getInputStream());
 8 StringBuffer content = new StringBuffer("");
 9   SlideShow ss = new SlideShow(new HSLFSlideShow(bis));
10   Slide[] slides = ss.getSlides();
11   for (int i = 0; i < slides.length; i++) {
12    TextRun[] t = slides[i].getTextRuns();
13    for (int j = 0; j < t.length; j++) {
14     content.append(t[j].getText());
15    }
16    content.append(slides[i].getTitle());
17   }
18   response.getWriter().write(content.toString());

 

pdf：

1 BufferedInputStream bis = null;
 2   URL url = null;
 3   HttpURLConnection httpUrl = null; // 建立链接
 4   url = new URL(urlReal);
 5   httpUrl = (HttpURLConnection) url.openConnection();// 连接指定的资源
 6   httpUrl.connect();// 获取网络输入流
 7   bis = new BufferedInputStream(httpUrl.getInputStream());
 8  PDDocument pdfdocument = null;
 9   PDFParser parser = new PDFParser(bis);
10   parser.parse();
11   pdfdocument = parser.getPDDocument();
12   ByteArrayOutputStream out = new ByteArrayOutputStream();
13   OutputStreamWriter writer = new OutputStreamWriter(out);
14   PDFTextStripper stripper = new PDFTextStripper();
15   stripper.writeText(pdfdocument.getDocument(), writer);
16   writer.close();
17   byte[] contents = out.toByteArray();
18   String ts = new String(contents);
19   response.getWriter().write(ts);

txt：

1 BufferedReader bis = null;
 2   URL url = null;
 3   HttpURLConnection httpUrl = null; // 建立链接
 4   url = new URL(urlReal);
 5   httpUrl = (HttpURLConnection) url.openConnection();// 连接指定的资源
 6   httpUrl.connect();// 获取网络输入流
 7   bis = new BufferedReader( new InputStreamReader(httpUrl.getInputStream()));
 8 StringBuffer buf=new StringBuffer();
 9   String temp;
10   while ((temp = bis.readLine()) != null) {
11    buf.append(temp);
12    response.getWriter().write(temp);
13    if(buf.length()>=1000){
14     break;
15    }
16   }
17   bis.close();