/// <summary>
/// 构造函数
/// </summary>
/// <param name="absolutePath">文件绝对路径</param>
/// <param name="sheetIndex">第几个表</param>
public ExcelHandler(string absolutePath, int sheetIndex = 0)
{
excel = new ExcelNPOI(absolutePath, sheetIndex);
}
public ExcelHandler()
{
excel = new ExcelNPOI();
}