http://www.andykhan.com/

原創

2020-02-22 07:48

http://www.andykhan.com/

JExcelApi is a Java API for reading, writing and modifying the contents of Excel spreadsheets
Orinoco is a Java API for generating text PDF documents

package excel;

import java.io.*;
import java.text.MessageFormat;
import java.text.SimpleDateFormat;
import java.util.Date;

import jxl.*;
import jxl.write.*;

@SuppressWarnings("unused")
public class ExcelDemo {

/**
* @param args
*/
public static void main(String[] args) {
  // TODO Auto-generated method stub
  String sourcefile = "test.xls";

  ReadFromExcel(sourcefile);

  WriteToExcel(sourcefile);
}

private static void ReadFromExcel(String fileName)
{
  try
  {
   File file = new File(fileName);
   if(!file.exists())
   {
    return;
   }
   InputStream is = new FileInputStream(fileName);

   jxl.Workbook rwb = Workbook.getWorkbook(is);

   Sheet rs = rwb.getSheet(0);
   System.out.println("行數：　" + rs.getRows());
   System.out.println("列數：　" + rs.getColumns());

   SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

   Date startDate = new Date();
   System.out.println("ReadFromExcel開始時間：　" + sdf.format(startDate));
   String strCell = "Cell({0}, {1})";
   for(int col = 0;col < rs.getColumns();col++)
   {
    for(int row = 0;row < rs.getRows();row++)
    {
     Cell c00 = rs.getCell(col, row);
     String strc00 = c00.getContents();

     System.out.println(MessageFormat.format(strCell,new Object[]{col,row}) + " value : " + strc00 + "; type : " + c00.getType());
    }

   }
   Date endDate = new Date();
   System.out.println("ReadFromExcel終了時間：　" + sdf.format(endDate));

   rwb.close();

   is.close();
  }
  catch(Exception e)
  {
   e.printStackTrace();
  }
}
private static void WriteToExcel(String fileName)
{
  try
  {
   File file = new File(fileName);
   if(file.exists())
   {
    file.delete();
   }

   jxl.write.WritableWorkbook wwb = Workbook.createWorkbook(new File(fileName));

   //OutputStream os = new FileOutputStream(fileName);
   //jxl.write.WritableWorkbook wwb = Workbook.createWorkbook(os);

   jxl.write.WritableSheet ws = wwb.createSheet("Test Sheet 1", 0);

   SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

   Date startDate = new Date();
   System.out.println("WriteToExcel開始時間：　" + sdf.format(startDate));
   //jxl.write.NumberFormat nf = new jxl.write.NumberFormat("#.##");
   //jxl.write.WritableCellFormat wcfN = new jxl.write.WritableCellFormat(nf);
   for(int col = 0;col < 50;col++)
   {
    for(int rowj = 0;rowj < 1000;rowj++)
    {
     //jxl.write.Number labelNF = new jxl.write.Number(i, j, 3.1415926 * i * j, wcfN);
     jxl.write.Number labelNF = new jxl.write.Number(col, rowj, 3.1415926 * col * rowj);
     ws.addCell(labelNF);
    }
   }
   Date endDate = new Date();
   System.out.println("WriteToExcel終了時間：　" + sdf.format(endDate));

   wwb.write();
   wwb.close();
  }
  catch(Exception e)
  {
   e.printStackTrace();
  }
}
}