public void TestReadCell()
        {
            string dataFilePath = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "file", "forread.xlsx");
            NPOIOperator oper = new NPOIOperator(dataFilePath, true);

            var sheet = oper.GetSheet(0);
            var row = sheet.GetRow(2);
            var cell = row.GetCell(1);
            var cellValue = oper.ReadCell(cell, CellDataType.Text);

            Assert.AreEqual("李四", cellValue);
        }