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java在线预览txt、word、ppt、execel，pdf代码

2016-12-20 13:15| 发布者: zhangjf| 查看: 489| 评论: 0

摘要: 在页面上显示各种文档中的内容。在servlet中的逻辑word：BufferedInputStream bis = null;URL url = null;HttpURLConnection httpUrl = null; // 建立链接url = new URL(urlReal);httpUrl = (HttpURLConnection) url ...
  1. 在页面上显示各种文档中的内容。在servlet中的逻辑
  3. word：
  5. BufferedInputStream bis = null;
  6. URL url = null;
  7. HttpURLConnection httpUrl = null; // 建立链接
  8. url = new URL(urlReal);
  9. httpUrl = (HttpURLConnection) url.openConnection();// 连接指定的资源
  10. httpUrl.connect();// 获取网络输入流
  11. bis = new BufferedInputStream(httpUrl.getInputStream());
  13. String bodyText = null;
  14. WordExtractor ex = new WordExtractor(bis);
  15. bodyText = ex.getText();
  16. response.getWriter().write(bodyText);
  18. excel：
  20. BufferedInputStream bis = null;
  21. URL url = null;
  22. HttpURLConnection httpUrl = null; // 建立链接
  23. url = new URL(urlReal);
  24. httpUrl = (HttpURLConnection) url.openConnection();// 连接指定的资源
  25. httpUrl.connect();// 获取网络输入流
  26. bis = new BufferedInputStream(httpUrl.getInputStream());
  28. content = new StringBuffer();
  29. HSSFWorkbook workbook = new HSSFWorkbook(bis);
  30. for (int numSheets = 0; numSheets < workbook.getNumberOfSheets(); numSheets++) {
  31. HSSFSheet aSheet = workbook.getSheetAt(numSheets);// 获得一个sheet
  32. content.append("/n");
  33. if (null == aSheet) {
  34. continue;
  35. }
  36. for (int rowNum = 0; rowNum <= aSheet.getLastRowNum(); rowNum++) {
  37. content.append("/n");
  38. HSSFRow aRow = aSheet.getRow(rowNum);
  39. if (null == aRow) {
  40. continue;
  41. }
  42. for (short cellNum = 0; cellNum <= aRow.getLastCellNum(); cellNum++) {
  43. HSSFCell aCell = aRow.getCell(cellNum);
  44. if (null == aCell) {
  45. continue;
  46. }
  47. if (aCell.getCellType() == HSSFCell.CELL_TYPE_STRING) {
  48. content.append(aCell.getRichStringCellValue()
  49. .getString());
  50. } else if (aCell.getCellType() == HSSFCell.CELL_TYPE_NUMERIC) {
  51. boolean b = HSSFDateUtil.isCellDateFormatted(aCell);
  52. if (b) {
  53. Date date = aCell.getDateCellValue();
  54. SimpleDateFormat df = new SimpleDateFormat(
  55. "yyyy-MM-dd");
  56. content.append(df.format(date));
  57. }
  58. }
  59. }
  60. }
  61. }
  62. response.getWriter().write(content.toString());
  64. ppt：
  66. BufferedInputStream bis = null;
  67. URL url = null;
  68. HttpURLConnection httpUrl = null; // 建立链接
  69. url = new URL(urlReal);
  70. httpUrl = (HttpURLConnection) url.openConnection();// 连接指定的资源
  71. httpUrl.connect();// 获取网络输入流
  72. bis = new BufferedInputStream(httpUrl.getInputStream());
  74. StringBuffer content = new StringBuffer("");
  75. SlideShow ss = new SlideShow(new HSLFSlideShow(bis));
  76. Slide[] slides = ss.getSlides();
  77. for (int i = 0; i < slides.length; i++) {
  78. TextRun[] t = slides[i].getTextRuns();
  79. for (int j = 0; j < t.length; j++) {
  80. content.append(t[j].getText());
  81. }
  82. content.append(slides[i].getTitle());
  83. }
  84. response.getWriter().write(content.toString());
  86. pdf：
  88. BufferedInputStream bis = null;
  89. URL url = null;
  90. HttpURLConnection httpUrl = null; // 建立链接
  91. url = new URL(urlReal);
  92. httpUrl = (HttpURLConnection) url.openConnection();// 连接指定的资源
  93. httpUrl.connect();// 获取网络输入流
  94. bis = new BufferedInputStream(httpUrl.getInputStream());
  96. PDDocument pdfdocument = null;
  97. PDFParser parser = new PDFParser(bis);
  98. parser.parse();
  99. pdfdocument = parser.getPDDocument();
  100. ByteArrayOutputStream out = new ByteArrayOutputStream();
  101. OutputStreamWriter writer = new OutputStreamWriter(out);
  102. PDFTextStripper stripper = new PDFTextStripper();
  103. stripper.writeText(pdfdocument.getDocument(), writer);
  104. writer.close();
  105. byte[] contents = out.toByteArray();
  107. String ts = new String(contents);
  108. response.getWriter().write(ts);
  110. txt：
  112. BufferedReader bis = null;
  113. URL url = null;
  114. HttpURLConnection httpUrl = null; // 建立链接
  115. url = new URL(urlReal);
  116. httpUrl = (HttpURLConnection) url.openConnection();// 连接指定的资源
  117. httpUrl.connect();// 获取网络输入流
  118. bis = new BufferedReader( new InputStreamReader(httpUrl.getInputStream()));
  120. StringBuffer buf=new StringBuffer();
  121. String temp;
  122. while ((temp = bis.readLine()) != null) {
  123. buf.append(temp);
  124. response.getWriter().write(temp);
  125. if(buf.length()>=1000){
  126. break;
  127. }
  128. }
  129. bis.close();
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