用java制作excel格式报表

try{
         getDBConnection();
         pstmt = conn.prepareStatement(strSql);
         ret = pstmt.executeQuery();
         File tempFile=new File(filename);
         try{
         WritableWorkbook workbook = Workbook.createWorkbook(tempFile);
         WritableSheet sheet = workbook.createSheet("sheet1", 0);
         Label l=null;
         jxl.write.Number n=null;
         jxl.write.DateTime d=null;
         WritableFont headerFont = new WritableFont(WritableFont.ARIAL,12,WritableFont.BOLD,false, UnderlineStyle.NO_UNDERLINE,jxl.format.Colour.BLUE);
         WritableCellFormat headerFormat = new WritableCellFormat (headerFont);

         WritableFont titleFont = new WritableFont(WritableFont.ARIAL,10,WritableFont.NO_BOLD,false, UnderlineStyle.NO_UNDERLINE,jxl.format.Colour.RED);
         WritableCellFormat titleFormat = new WritableCellFormat (titleFont);

         WritableFont detFont = new WritableFont(WritableFont.ARIAL,10,WritableFont.NO_BOLD,false, UnderlineStyle.NO_UNDERLINE,jxl.format.Colour.BLACK);
         WritableCellFormat detFormat = new WritableCellFormat (detFont);

         NumberFormat nf=new NumberFormat("0.00000");
         WritableCellFormat priceFormat = new WritableCellFormat (detFont, nf);

         DateFormat df=new DateFormat("yyyy-MM-dd");
         WritableCellFormat dateFormat = new WritableCellFormat (detFont, df);

         l=new Label(2,0,"",headerFormat);
         sheet.addCell(l);
         int intTitle = title.length;
         for (int i=0;i<intTitle;i++)
         {
           l=new Label(i,2,title[i], titleFormat);
           sheet.addCell(l);
         }
        int k = 0;
        while(ret.next())
                {
                  k++;
                  for (int j=1;j<intTitle;j++)
                        {
              l=new Label(j-1,k+3,ret.getString(j),detFormat);
              sheet.addCell(l);
                          //sheet.setColumnView(j,30);
                        }
                }
         workbook.write();
         workbook.close();
         } catch(Exception e){}
    }
   catch(SQLException ae) {
        throw new ApplicationException("创建Excel时查询数据库操作失败! " +
             "错误信息:" +strSql + ",异常信息为 :\n" + ae.getMessage());
     } finally {
                closeResultSet(ret);
                closeStatement(pstmt);
                closeConnection();
                   }
}

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