1 //电子表格对象
 2 IWorkbook wk = new HSSFWorkbook();
 3 //电子表格Sheet页对象
 4 ISheet sheet = wk.CreateSheet("Sheet1");
 5 //电子表格列对象
 6 ICellStyle cellStyle = wk.CreateCellStyle();
 7 //样式对象
 8 IDataFormat format = wk.CreateDataFormat();
 9 //时间格式化
10 cellStyle.DataFormat = format.GetFormat("0.00");
11 //下边框
12 cellStyle.BorderBottom = BorderStyle.Thin;
13 //左边框
14 cellStyle.BorderLeft = BorderStyle.Thin;
15 //右边框
16 cellStyle.BorderRight = BorderStyle.Thin;
17 //上边框
18 cellStyle.BorderTop = BorderStyle.Thin;
19 //水平居中
20 cellStyle.Alignment = HorizontalAlignment.Center;
21 //垂直居中
22 cellStyle.VerticalAlignment = VerticalAlignment.Justify;