workbookparser.java

JAVA读取excel表格里的数据,与jdbc功能相当,是一个包

        }
        else
        {
          nr = new NameRecord(r, settings, namedRecords.size(),
                              NameRecord.biff7);
        }
        namedRecords.put(nr.getName(), nr);
        nameTable.add(nr);
      }
      else if (r.getType() == Type.FONT)
      {
        FontRecord fr = null;

        if (bof.isBiff8())
        {
          fr = new FontRecord(r, settings);
        }
        else
        {
          fr = new FontRecord(r, settings, FontRecord.biff7);
        }
        fonts.addFont(fr);
      }
      else if (r.getType() == Type.PALETTE)
      {
        PaletteRecord palette = new PaletteRecord(r);
        formattingRecords.setPalette(palette);
      }
      else if (r.getType() == Type.NINETEENFOUR)
      {
        NineteenFourRecord nr = new NineteenFourRecord(r);
        nineteenFour = nr.is1904();
      }
      else if (r.getType() == Type.FORMAT)
      {
        FormatRecord fr = null;
        if (bof.isBiff8())
        {
          fr = new FormatRecord(r, settings, FormatRecord.biff8);
        }
        else
        {
          fr = new FormatRecord(r, settings, FormatRecord.biff7);
        }
        try
        {
          formattingRecords.addFormat(fr);
        }
        catch (NumFormatRecordsException e)
        {
          e.printStackTrace();
          // This should not happen.  Bomb out
          Assert.verify(false, e.getMessage());
        }
      }
      else if (r.getType() == Type.XF)
      {
        XFRecord xfr = null;
        if (bof.isBiff8())
        {
          xfr = new XFRecord(r, settings, XFRecord.biff8);
        }
        else
        {
          xfr = new XFRecord(r, settings, XFRecord.biff7);
        }

        try
        {
          formattingRecords.addStyle(xfr);
        }
        catch (NumFormatRecordsException e)
        {
          // This should not happen.  Bomb out
          Assert.verify(false, e.getMessage());
        }
      }
      else if (r.getType() == Type.BOUNDSHEET)
      {
        BoundsheetRecord br = null;

        if (bof.isBiff8())
        {
          br = new BoundsheetRecord(r);
        }
        else
        {
          br = new BoundsheetRecord(r, BoundsheetRecord.biff7);
        }

        if (br.isSheet())
        {
          boundsheets.add(br);
        }
        else if (br.isChart() && !settings.getDrawingsDisabled())
        {
          boundsheets.add(br);
        }
      }
      else if (r.getType() == Type.EXTERNSHEET)
      {
        if (bof.isBiff8())
        {
          externSheet = new ExternalSheetRecord(r, settings);
        }
        else
        {
          externSheet = new ExternalSheetRecord(r, settings,
                                                ExternalSheetRecord.biff7);
        }
      }
      else if (r.getType() == Type.CODEPAGE)
      {
        CodepageRecord cr = new CodepageRecord(r);
        settings.setCharacterSet(cr.getCharacterSet());
      }
      else if (r.getType() == Type.SUPBOOK)
      {
        Record nextrec = excelFile.peek();
        while (nextrec.getType() == Type.CONTINUE)
        {
          r.addContinueRecord(excelFile.next());
          nextrec = excelFile.peek();
        }

        SupbookRecord sr = new SupbookRecord(r, settings);
        supbooks.add(sr);
      }
      else if (r.getType() == Type.EXTERNNAME)
      {
        ExternalNameRecord enr = new ExternalNameRecord(r, settings);

        if (enr.isAddInFunction())
        {
          addInFunctions.add(enr.getName());
        }
      }
      else if (r.getType() == Type.PROTECT)
      {
        ProtectRecord pr = new ProtectRecord(r);
        wbProtected = pr.isProtected();
      }
      else if (r.getType() == Type.OBJPROJ)
      {
        containsMacros = true;
      }
      else if (r.getType() == Type.COUNTRY)
      {
        countryRecord = new CountryRecord(r);
      }
      else if (r.getType() == Type.MSODRAWINGGROUP)
      {
        if (!settings.getDrawingsDisabled())
        {
          msoDrawingGroup = new MsoDrawingGroupRecord(r);

          if (drawingGroup == null)
          {
            drawingGroup = new DrawingGroup(Origin.READ);
          }

          drawingGroup.add(msoDrawingGroup);

          Record nextrec = excelFile.peek();
          while (nextrec.getType() == Type.CONTINUE)
          {
            drawingGroup.add(excelFile.next());
            nextrec = excelFile.peek();
          }
        }
      }
      else if (r.getType() == Type.BUTTONPROPERTYSET)
      {
        buttonPropertySet = new ButtonPropertySetRecord(r);
      }
      else if (r.getType() == Type.EOF)
      {
        bofs--;
      }
    }

    bof = null;
    if (excelFile.hasNext())
    {
      r = excelFile.next();

      if (r.getType() == Type.BOF)
      {
        bof = new BOFRecord(r);
      }
    }

    // Only get sheets for which there is a corresponding Boundsheet record
    while (bof != null && getNumberOfSheets() < boundsheets.size())
    {
      if (!bof.isBiff8() && !bof.isBiff7())
      {
        throw new BiffException(BiffException.unrecognizedBiffVersion);
      }

      if (bof.isWorksheet())
      {
        // Read the sheet in
        SheetImpl s = new SheetImpl(excelFile,
                                    sharedStrings,
                                    formattingRecords,
                                    bof,
                                    workbookBof,
                                    nineteenFour,
                                    this);

        BoundsheetRecord br = (BoundsheetRecord) boundsheets.get
          (getNumberOfSheets());
        s.setName(br.getName());
        s.setHidden(br.isHidden());
        addSheet(s);
      }
      else if (bof.isChart())
      {
        // Read the sheet in
        SheetImpl s = new SheetImpl(excelFile,
                                    sharedStrings,
                                    formattingRecords,
                                    bof,
                                    workbookBof,
                                    nineteenFour,
                                    this);

        BoundsheetRecord br = (BoundsheetRecord) boundsheets.get
          (getNumberOfSheets());
        s.setName(br.getName());
        s.setHidden(br.isHidden());
        addSheet(s);
      }
      else
      {
        logger.warn("BOF is unrecognized");


        while (excelFile.hasNext() && r.getType() != Type.EOF)
        {
          r = excelFile.next();
        }
      }

      // The next record will normally be a BOF or empty padding until
      // the end of the block is reached.  In exceptionally unlucky cases,
      // the last EOF  will coincide with a block division, so we have to
      // check there is more data to retrieve.
      // Thanks to liamg for spotting this
      bof = null;
      if (excelFile.hasNext())
      {
        r = excelFile.next();

        if (r.getType() == Type.BOF)
        {
          bof = new BOFRecord(r);
        }
      }
    }
  }

  /**
   * Accessor for the formattingRecords, used by the WritableWorkbook
   * when creating a copy of this
   *
   * @return the formatting records
   */
  public FormattingRecords getFormattingRecords()
  {
    return formattingRecords;
  }

  /**
   * Accessor for the externSheet, used by the WritableWorkbook
   * when creating a copy of this
   *
   * @return the external sheet record
   */
  public ExternalSheetRecord getExternalSheetRecord()
  {
    return externSheet;
  }

  /**
   * Accessor for the MsoDrawingGroup, used by the WritableWorkbook
   * when creating a copy of this
   *
   * @return the Mso Drawing Group record
   */
  public MsoDrawingGroupRecord getMsoDrawingGroupRecord()
  {
    return msoDrawingGroup;
  }

  /**
   * Accessor for the supbook records, used by the WritableWorkbook
   * when creating a copy of this
   *
   * @return the supbook records
   */
  public SupbookRecord[] getSupbookRecords()
  {
    SupbookRecord[] sr = new SupbookRecord[supbooks.size()];
    return (SupbookRecord[]) supbooks.toArray(sr);
  }

  /**
   * Accessor for the name records.  Used by the WritableWorkbook when
   * creating a copy of this
   *
   * @return the array of names
   */
  public NameRecord[] getNameRecords()
  {
    NameRecord[] na = new NameRecord[nameTable.size()];
    return (NameRecord[]) nameTable.toArray(na);
  }

  /**
   * Accessor for the fonts, used by the WritableWorkbook
   * when creating a copy of this
   * @return the fonts used in this workbook
   */
  public Fonts getFonts()
  {
    return fonts;
  }

  /**
   * Returns the cell for the specified location eg. "Sheet1!A4".  
   * This is identical to using the CellReferenceHelper with its
   * associated performance overheads, consequently it should
   * be use sparingly
   *
   * @param loc the cell to retrieve
   * @return the cell at the specified location
   */
  public Cell getCell(String loc)
  {
    Sheet s = getSheet(CellReferenceHelper.getSheet(loc)); 
    return s.getCell(loc);
  }

  /**
   * Gets the named cell from this workbook.  If the name refers to a
   * range of cells, then the cell on the top left is returned.  If
   * the name cannot be found, null is returned
   *
   * @param  name the name of the cell/range to search for
   * @return the cell in the top left of the range if found, NULL
   *         otherwise
   */
  public Cell findCellByName(String name)
  {
    NameRecord nr = (NameRecord) namedRecords.get(name);

    if (nr == null)
    {
      return null;
    }

    NameRecord.NameRange[] ranges = nr.getRanges();

    // Go and retrieve the first cell in the first range
    Sheet s = getSheet(getExternalSheetIndex(ranges[0].getExternalSheet()));
    int col = ranges[0].getFirstColumn();
    int row = ranges[0].getFirstRow();

    // If the sheet boundaries fall short of the named cell, then return
    // an empty cell to stop an exception being thrown
    if (col > s.getColumns() || row > s.getRows())
    {
      return new EmptyCell(col, row);
    }
    
    Cell cell = s.getCell(col, row);

    return cell;
  }

  /**
   * Gets the named range from this workbook.  The Range object returns
   * contains all the cells from the top left to the bottom right
   * of the range.
   * If the named range comprises an adjacent range,
   * the Range[] will contain one object; for non-adjacent
   * ranges, it is necessary to return an array of length greater than
   * one.
   * If the named range contains a single cell, the top left and
   * bottom right cell will be the same cell
   *
   * @param name the name to find
   * @return the range of cells
   */
  public Range[] findByName(String name)
  {
    NameRecord nr = (NameRecord) namedRecords.get(name);

    if (nr == null)
    {
      return null;
    }

    NameRecord.NameRange[] ranges = nr.getRanges();

    Range[] cellRanges = new Range[ranges.length];

    for (int i = 0; i < ranges.length; i++)
    {
      cellRanges[i] = new RangeImpl
        (this,
         getExternalSheetIndex(ranges[i].getExternalSheet()),
         ranges[i].getFirstColumn(),
         ranges[i].getFirstRow(),
         getLastExternalSheetIndex(ranges[i].getExternalSheet()),
         ranges[i].getLastColumn(),
         ranges[i].getLastRow());
    }

    return cellRanges;
  }

  /**
   * Gets the named ranges
   *
   * @return the list of named cells within the workbook
   */
  public String[] getRangeNames()
  {
    Object[] keys = namedRecords.keySet().toArray();
    String[] names = new String[keys.length];
    System.arraycopy(keys, 0, names, 0, keys.length);

    return names;
  }

  /**
   * Method used when parsing formulas to make sure we are trying
   * to parse a supported biff version
   *
   * @return the BOF record
   */
  public BOFRecord getWorkbookBof()
  {
    return workbookBof;
  }

  /**
   * Determines whether the sheet is protected
   *
   * @return whether or not the sheet is protected
   */
  public boolean isProtected()
  {
    return wbProtected;
  }

  /**
   * Accessor for the settings
   *
   * @return the workbook settings
   */
  public WorkbookSettings getSettings()
  {
    return settings;
  }

  /**
   * Accessor/implementation method for the external sheet reference
   *
   * @param sheetName the sheet name to look for
   * @return the external sheet index
   */
  public int getExternalSheetIndex(String sheetName)
  {
    return 0;
  }

  /**
   * Accessor/implementation method for the external sheet reference
   *
   * @param sheetName the sheet name to look for
   * @return the external sheet index
   */
  public int getLastExternalSheetIndex(String sheetName)
  {
    return 0;
  }

  /**
   * Gets the name at the specified index
   *
   * @param index the index into the name table
   * @return the name of the cell
   */
  public String getName(int index)
  {
    Assert.verify(index >= 0 && index < nameTable.size());
    return ((NameRecord) nameTable.get(index)).getName();
  }

  /**
   * Gets the index of the name record for the name
   *
   * @param name the name to search for
   * @return the index in the name table
   */
  public int getNameIndex(String name)
  {
    NameRecord nr = (NameRecord) namedRecords.get(name);

    return nr != null ? nr.getIndex() : 0;
  }

  /**
   * Accessor for the drawing group
   *
   * @return  the drawing group
   */
  public DrawingGroup getDrawingGroup()
  {
    return drawingGroup;
  }

  /**
   * Accessor for the CompoundFile.  For this feature to return non-null
   * value, the propertySets feature in WorkbookSettings must be enabled
   * and the workbook must contain additional property sets.  This
   * method is used during the workbook copy
   *
   * @return the base compound file if it contains additional data items
   *         and property sets are enabled
   */
  public CompoundFile getCompoundFile()
  {
    return excelFile.getCompoundFile();
  }

  /**
   * Accessor for the containsMacros
   *
   * @return TRUE if this workbook contains macros, FALSE otherwise
   */
  public boolean containsMacros()
  {
    return containsMacros;
  }

  /**
   * Accessor for the button property set, used during copying
   *
   * @return the button property set
   */
  public ButtonPropertySetRecord getButtonPropertySet()
  {
    return buttonPropertySet;
  }

  /**
   * Accessor for the country record, using during copying
   *
   * @return the country record read in
   */
  public CountryRecord getCountryRecord()
  {
    return countryRecord;
  }

  /**
   * Accessor for addin function names
   *
   * @return list of add in function names
   */
  public String[] getAddInFunctionNames()
  {
    String[] addins = new String[0];
    return (String[]) addInFunctions.toArray(addins);
  }
}