NPOI导出Excel——精简版

public void ExportToExcelTwo(System.Data.DataTable dt, string colTitle, string filePath)
        {
            HSSFWorkbook workBook = new HSSFWorkbook();
            HSSFSheet sheet = (HSSFSheet)workBook.CreateSheet("sheet1");
            HSSFRow row1 = (HSSFRow)sheet.CreateRow(0);
            string[] titles = colTitle.Split(‘,‘);
            for (int i = 0; i < titles.Length; i++)
            {
                HSSFCell cell = (HSSFCell)row1.CreateCell(i, CellType.STRING);
                cell.SetCellValue(titles[i]);
            }
            for (int j = 0; j < dt.Rows.Count; j++)
            {
                HSSFRow rows = (HSSFRow)sheet.CreateRow(j + 1);
                for (int k = 0; k < dt.Columns.Count; k++)
                {
                    HSSFCell cells = (HSSFCell)rows.CreateCell(k);
                    cells.SetCellValue(dt.Rows[j][k].ToString());
                }
            }
            using (FileStream fs = new FileStream(filePath, FileMode.OpenOrCreate))
            {
                workBook.Write(fs);
            }
            GC.Collect();
        }