escher.java

专业为java开发的用于和excel交互的api函数。可以方便访问excel

/*********************************************************************
*
*      Copyright (C) 2005 Andrew Khan
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
***************************************************************************/

package jxl.demo;

import java.io.BufferedWriter;
import java.io.IOException;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.UnsupportedEncodingException;

import jxl.Workbook;
import jxl.biff.drawing.DrawingData;
import jxl.biff.drawing.EscherDisplay;
import jxl.read.biff.SheetImpl;

/**
 * Displays the escher data
 */
public class Escher
{
  /**
   * Constructor
   *
   * @param w The workbook to interrogate
   * @param out The output stream to which the CSV values are written
   * @param encoding The encoding used by the output stream.  Null or 
   * unrecognized values cause the encoding to default to UTF8
   * @exception java.io.IOException
   */
  public Escher (Workbook w, OutputStream out, String encoding)
    throws IOException
  {
    if (encoding == null || !encoding.equals("UnicodeBig"))
    {
      encoding = "UTF8";
    }

    try
    {
      OutputStreamWriter osw = new OutputStreamWriter(out, encoding);
      BufferedWriter bw = new BufferedWriter(osw);

      for (int i = 0; i < w.getNumberOfSheets(); i++)
      {
        SheetImpl s = (SheetImpl) w.getSheet(i);
        bw.write(s.getName());
        bw.newLine();
        bw.newLine();

        DrawingData dd = s.getDrawingData();

        if (dd != null)
        {
          EscherDisplay ed = new EscherDisplay(dd, bw);
          ed.display();
        }
        
        bw.newLine();
        bw.newLine();
        bw.flush();
      }
      bw.flush();
      bw.close();
    }
    catch (UnsupportedEncodingException e)
    {
      System.err.println(e.toString());
    }
  }

}