public static boolean CreateExcel()
    {
        String FileName;
        FileName = "";
        FileOutputStream fileOut = null;
        try
        {
            HSSFWorkbook wb = new HSSFWorkbook();
            HSSFSheet sheet = wb.createSheet();
            wb.setSheetName(0,"测试",HSSFWorkbook.ENCODING_UTF_16); 

            HSSFRow row0 = sheet.createRow(0);
            HSSFRow row1 = sheet.createRow(1);
         
              String strf = "1.01";
            float f = Float.valueOf(strf).floatValue();
  
            HSSFCell cell = row0.createCell((short)0);
            
            cell.setCellValue( strf);　//这个是字符的1.01，导出后每次都得手工改成数字型
           
            cell = row1.createCell((short)0);
           　cell.setCellValue( f);　//单元格里看到的是1.01，但实际值却是1.00999999046325 ，数据多时，恐有误差。
          　
            String filepath = "c:\\poi.xls";
          
            fileOut = new FileOutputStream(filepath);
            wb.write(fileOut);
            fileOut.flush();
            fileOut.close();
        }
        catch(Exception ex)
        {
            ex.printStackTrace();
            return false;
        }
        finally
        {
            try
            {
                fileOut.close();
            }
            catch(Exception e)
            {
                e.printStackTrace();
            }
        }
        return true;
    }