sheetcopier.java

JAVA读取excel表格里的数据,与jdbc功能相当,是一个包

    // Copy the hyperlinks
    Hyperlink[] hls = fromSheet.getHyperlinks();
    for (int i = 0 ; i < hls.length; i++)
    {
      WritableHyperlink hr = new WritableHyperlink
        (hls[i], toSheet);
      hyperlinks.add(hr);
    }

    // Copy the merged cells
    Range[] merged = fromSheet.getMergedCells();

    for (int i = 0; i < merged.length; i++)
    {
      mergedCells.add(new SheetRangeImpl((SheetRangeImpl)merged[i], toSheet));
    }

    // Copy the row properties
    try
    {
      jxl.read.biff.RowRecord[] rowprops  = fromSheet.getRowProperties();

      for (int i = 0; i < rowprops.length; i++)
      {
        RowRecord rr = toSheet.getRowRecord(rowprops[i].getRowNumber());
        XFRecord format = rowprops[i].hasDefaultFormat() ? 
          formatRecords.getXFRecord(rowprops[i].getXFIndex()) : null;
        rr.setRowDetails(rowprops[i].getRowHeight(), 
                         rowprops[i].matchesDefaultFontHeight(),
                         rowprops[i].isCollapsed(),
                         format);
      }
    }
    catch (RowsExceededException e)
    {
      // Handle the rows exceeded exception - this cannot occur since
      // the sheet we are copying from will have a valid number of rows
      Assert.verify(false);
    }

    // Copy the headers and footers
    //    sheetWriter.setHeader(new HeaderRecord(si.getHeader()));
    //    sheetWriter.setFooter(new FooterRecord(si.getFooter()));

    // Copy the page breaks
    int[] rowbreaks = fromSheet.getRowPageBreaks();

    if (rowbreaks != null)
    {
      for (int i = 0; i < rowbreaks.length; i++)
      {
        rowBreaks.add(new Integer(rowbreaks[i]));
      }
    }

    int[] columnbreaks = fromSheet.getColumnPageBreaks();

    if (columnbreaks != null)
    {
      for (int i = 0; i < columnbreaks.length; i++)
      {
        columnBreaks.add(new Integer(columnbreaks[i]));
      }
    }

    // Copy the charts
    logger.warn("Importing of charts is not supported");
    /*
    Chart[] fromCharts = fromSheet.getCharts();
    if (fromCharts != null)
    {
      sheetWriter.setCharts(fromSheet.getCharts());
      IndexMapping xfMapping = new IndexMapping(200);
      for (Iterator i = xfRecords.keySet().iterator(); i.hasNext();)
      {
        Integer key = (Integer) i.next();
        XFRecord xfmapping = (XFRecord) xfRecords.get(key);
        xfMapping.setMapping(key.intValue(), xfmapping.getXFIndex());
      }

      IndexMapping fontMapping = new IndexMapping(200);
      for (Iterator i = fonts.keySet().iterator(); i.hasNext();)
      {
        Integer key = (Integer) i.next();
        Integer fontmap = (Integer) fonts.get(key);
        fontMapping.setMapping(key.intValue(), fontmap.intValue());
      }

      IndexMapping formatMapping = new IndexMapping(200);
      for (Iterator i = formats.keySet().iterator(); i.hasNext();)
      {
        Integer key = (Integer) i.next();
        Integer formatmap = (Integer) formats.get(key);
        formatMapping.setMapping(key.intValue(), formatmap.intValue());
      }

      // Now reuse the rationalization feature on each chart  to
      // handle the new fonts
      for (int i = 0; i < fromCharts.length ; i++)
      {
        fromCharts[i].rationalize(xfMapping, fontMapping, formatMapping);
      }
    }
    */

    // Copy the drawings
    DrawingGroupObject[] dr = fromSheet.getDrawings();
    for (int i = 0 ; i < dr.length ; i++)
    {
      if (dr[i] instanceof jxl.biff.drawing.Drawing)
      {
        WritableImage wi = new WritableImage
          (dr[i], toSheet.getWorkbook().getDrawingGroup());
        drawings.add(wi);
        images.add(wi);
      }
      else if (dr[i] instanceof jxl.biff.drawing.Comment)
      {
        jxl.biff.drawing.Comment c = 
          new jxl.biff.drawing.Comment(dr[i], 
                                       toSheet.getWorkbook().getDrawingGroup(),
                                       workbookSettings);
        drawings.add(c);
        
        // Set up the reference on the cell value
        CellValue cv = (CellValue) toSheet.getWritableCell(c.getColumn(), 
                                                           c.getRow());
        Assert.verify(cv.getCellFeatures() != null);
        cv.getWritableCellFeatures().setCommentDrawing(c);
      }
      else if (dr[i] instanceof jxl.biff.drawing.Button)
      {
        jxl.biff.drawing.Button b = 
          new jxl.biff.drawing.Button
          (dr[i], 
           toSheet.getWorkbook().getDrawingGroup(),
           workbookSettings);
        drawings.add(b);
      }
      else if (dr[i] instanceof jxl.biff.drawing.ComboBox)
      {
        jxl.biff.drawing.ComboBox cb = 
          new jxl.biff.drawing.ComboBox
          (dr[i], 
           toSheet.getWorkbook().getDrawingGroup(), 
           workbookSettings);
        drawings.add(cb);
      }
    }

    // Copy the data validations
    DataValidation rdv = fromSheet.getDataValidation();
    if (rdv != null)
    {
      dataValidation = new DataValidation(rdv, 
                                          toSheet.getWorkbook(), 
                                          toSheet.getWorkbook(),
                                          workbookSettings);
      int objid = dataValidation.getComboBoxObjectId();
      if (objid != 0)
      {
        comboBox = (ComboBox) drawings.get(objid);
      }
    }

    // Copy the workspace options
    sheetWriter.setWorkspaceOptions(fromSheet.getWorkspaceOptions());

    // Set a flag to indicate if it contains a chart only
    if (fromSheet.getSheetBof().isChart())
    {
      chartOnly = true;
      sheetWriter.setChartOnly();
    }

    // Copy the environment specific print record
    if (fromSheet.getPLS() != null)
    {
      if (fromSheet.getWorkbookBof().isBiff7())
      {
        logger.warn("Cannot copy Biff7 print settings record - ignoring");
      }
      else
      {
        plsRecord = new PLSRecord(fromSheet.getPLS());
      }
    }

    // Copy the button property set
    if (fromSheet.getButtonPropertySet() != null)
    {
      buttonPropertySet = new ButtonPropertySetRecord
        (fromSheet.getButtonPropertySet());
    }
  }

  /**
   * Performs a shallow copy of the specified cell
   */
  private WritableCell shallowCopyCell(Cell cell)
  {
    CellType ct = cell.getType();
    WritableCell newCell = null;

    if (ct == CellType.LABEL)
    {
      newCell = new Label((LabelCell) cell);
    }
    else if (ct == CellType.NUMBER)
    {
      newCell = new Number((NumberCell) cell);
    }
    else if (ct == CellType.DATE)
    {
      newCell = new DateTime((DateCell) cell);
    }
    else if (ct == CellType.BOOLEAN)
    {
      newCell = new Boolean((BooleanCell) cell);
    }
    else if (ct == CellType.NUMBER_FORMULA)
    {
      newCell = new ReadNumberFormulaRecord((FormulaData) cell);
    }
    else if (ct == CellType.STRING_FORMULA)
    {
      newCell = new ReadStringFormulaRecord((FormulaData) cell);
    }
    else if( ct == CellType.BOOLEAN_FORMULA)
    {
      newCell = new ReadBooleanFormulaRecord((FormulaData) cell);
    }
    else if (ct == CellType.DATE_FORMULA)
    {
      newCell = new ReadDateFormulaRecord((FormulaData) cell);
    }
    else if(ct == CellType.FORMULA_ERROR)
    {
      newCell = new ReadErrorFormulaRecord((FormulaData) cell);
    }
    else if (ct == CellType.EMPTY)
    {
      if (cell.getCellFormat() != null)
      {
        // It is a blank cell, rather than an empty cell, so
        // it may have formatting information, so
        // it must be copied
        newCell = new Blank(cell);
      }
    }
    
    return newCell;
  }

  /** 
   * Performs a deep copy of the specified cell, handling the cell format
   * 
   * @param cell the cell to copy
   */
  private WritableCell deepCopyCell(Cell cell)
  {
    WritableCell c = shallowCopyCell(cell);

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

    // Copy the cell format
    CellFormat cf = c.getCellFormat();
    int index = ( (XFRecord) cf).getXFIndex();
    WritableCellFormat wcf = (WritableCellFormat) 
      xfRecords.get(new Integer(index));
    if (wcf == null)
    {
      wcf = copyCellFormat(cf);
    }

    c.setCellFormat(wcf);

    return c;
  }

  /** 
   * Perform a shallow copy of the cells from the specified sheet into this one
   */
  void shallowCopyCells()
  {
    // Copy the cells
    int cells = fromSheet.getRows();
    Cell[] row = null;
    Cell cell = null;
    for (int i = 0;  i < cells; i++)
    {
      row = fromSheet.getRow(i);

      for (int j = 0; j < row.length; j++)
      {
        cell = row[j];
        WritableCell c = shallowCopyCell(cell);

        // Encase the calls to addCell in a try-catch block
        // These should not generate any errors, because we are
        // copying from an existing spreadsheet.  In the event of
        // errors, catch the exception and then bomb out with an
        // assertion
        try
        {
          if (c != null)
          {
            toSheet.addCell(c);
          }
        }
        catch (WriteException e)
        {
          Assert.verify(false);
        }
      }
    }
  }

  /** 
   * Perform a deep copy of the cells from the specified sheet into this one
   */
  void deepCopyCells()
  {
    // Copy the cells
    int cells = fromSheet.getRows();
    Cell[] row = null;
    Cell cell = null;
    for (int i = 0;  i < cells; i++)
    {
      row = fromSheet.getRow(i);

      for (int j = 0; j < row.length; j++)
      {
        cell = row[j];
        WritableCell c = deepCopyCell(cell);

        // Encase the calls to addCell in a try-catch block
        // These should not generate any errors, because we are
        // copying from an existing spreadsheet.  In the event of
        // errors, catch the exception and then bomb out with an
        // assertion
        try
        {
          if (c != null)
          {
            toSheet.addCell(c);
          }
        }
        catch (WriteException e)
        {
          Assert.verify(false);
        }
      }
    }
  }

  /**
   * Returns an initialized copy of the cell format
   *
   * @param cf the cell format to copy
   * @return a deep copy of the cell format
   */
  private WritableCellFormat copyCellFormat(CellFormat cf)
  {
    try
    {
      // just do a deep copy of the cell format for now.  This will create
      // a copy of the format and font also - in the future this may
      // need to be sorted out
      XFRecord xfr = (XFRecord) cf;
      WritableCellFormat f = new WritableCellFormat(xfr);
      formatRecords.addStyle(f);

      // Maintain the local list of formats
      int xfIndex = xfr.getXFIndex();
      xfRecords.put(new Integer(xfIndex), f);

      int fontIndex = xfr.getFontIndex();
      fonts.put(new Integer(fontIndex), new Integer(f.getFontIndex()));

      int formatIndex = xfr.getFormatRecord();
      formats.put(new Integer(formatIndex), new Integer(f.getFormatRecord()));

      return f;
    }
    catch (NumFormatRecordsException e)
    {
      logger.warn("Maximum number of format records exceeded.  Using " +
                  "default format.");

      return WritableWorkbook.NORMAL_STYLE;
    }
  }
}