Java开源解决方案是Apache POI。也许这里有一种设置互操作的方法，但我对Java的了解不够，无法回答这个问题。

当我探索这个问题时，我最终使用了互操作程序集。

要将xls保存为xlsx格式，我们只需要从Microsoft.Office.Interop.Excel库调用SaveAs方法。该方法将采用大约16个参数，其中一个参数是文件格式。

Microsoft文档：此处另存为方法参数

我们需要传递的对象如下

wb.SaveAs(filename, 51, System.Reflection.Missing.Value,
System.Reflection.Missing.Value, false, false, 1,1, true, 
System.Reflection.Missing.Value, System.Reflection.Missing.Value, System.Reflection.Missing.Value)

这里，51是XLSX的枚举值

对于不同文件格式的另存为，可以参考xlFileFormat

您可以使用此库创建格式良好的Excel文件：http://officehelper.codeplex.com/documentation参见以下示例：

using (ExcelHelper helper = new ExcelHelper(TEMPLATE_FILE_NAME, GENERATED_FILE_NAME))
{
    helper.Direction = ExcelHelper.DirectionType.TOP_TO_DOWN;
    helper.CurrentSheetName = "Sheet1";
    helper.CurrentPosition = new CellRef("C3");

    //the template xlsx should contains the named range "header"; use the command "insert"/"name".
    helper.InsertRange("header");

    //the template xlsx should contains the named range "sample1";
    //inside this range you should have cells with these values:
    //<name> , <value> and <comment>, which will be replaced by the values from the getSample()
    CellRangeTemplate sample1 = helper.CreateCellRangeTemplate("sample1", new List<string> {"name", "value", "comment"}); 
    helper.InsertRange(sample1, getSample());

    //you could use here other named ranges to insert new cells and call InsertRange as many times you want, 
    //it will be copied one after another;
    //even you can change direction or the current cell/sheet before you insert

    //typically you put all your "template ranges" (the names) on the same sheet and then you just delete it
    helper.DeleteSheet("Sheet3");
}        

示例如下：

private IEnumerable<List<object>> getSample()
{
    var random = new Random();

    for (int loop = 0; loop < 3000; loop++)
    {
        yield return new List<object> {"test", DateTime.Now.AddDays(random.NextDouble()*100 - 50), loop};
    }
}

在我的项目中，我使用一些.net库来提取Excel文件（.xls和.xlsx）

为了导出数据，我经常使用rdlc。

要修改我使用的excel文件（尝试设置空白单元格A15时的示例代码）：

关闭的XML

        //Closed XML
        var workbook = new XLWorkbook(sUrlFile); // load the existing excel file
        var worksheet = workbook.Worksheets.Worksheet(1);
        worksheet.Cell("A15").SetValue("");
        workbook.Save();

铁杆XL

       string sUrlFile = "G:\\ReportAmortizedDetail.xls";
        WorkBook workbook = WorkBook.Load(sUrlFile);
        WorkSheet sheet = workbook.WorkSheets.First();
        //Select cells easily in Excel notation and return the calculated value
        sheet["A15"].First().Value = "";
        sheet["A15"].First().FormatString = "";

        workbook.Save();
        workbook.Close();
        workbook = null;

SpireXLS（当我尝试时，库会打印附加页，以提供我们使用试用库的信息

            string sUrlFile = "G:\\ReportAmortizedDetail.xls";
            Workbook workbook = new Workbook();
            workbook.LoadFromFile(sUrlFile);
            //Get the 1st sheet
            Worksheet sheet = workbook.Worksheets[0];
            //Specify the cell range
            CellRange range = sheet.Range["A15"];
            //Find all matched text in the range
            CellRange[] cells = range.FindAllString("hi", false, false);
            //Replace text
            foreach (CellRange cell in range)
            {
                cell.Text = "";
            }
            //Save
            workbook.Save();

Jet Oledb公司

    //ExcelTool Class
    public static int ExcelUpdateSheets(string path, string sWorksheetName, string sCellLocation, string sValue)
    {
        int iResult = -99;
        String sConnectionString = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + path + ";Extended Properties='Excel 8.0;HDR=NO'";
        OleDbConnection objConn = new OleDbConnection(sConnectionString);
        objConn.Open();
        OleDbCommand objCmdSelect = new OleDbCommand("UPDATE [" + sWorksheetName + "$" + sCellLocation + "] SET F1=" + UtilityClass.ValueSQL(sValue), objConn);
        objCmdSelect.ExecuteNonQuery();
        objConn.Close();

        return iResult;
    }

用法：

    ExcelTool.ExcelUpdateSheets(sUrlFile, "ReportAmortizedDetail", "A15:A15", "");

天冬氨酸

            var workbook = new Aspose.Cells.Workbook(sUrlFile);
            // access first (default) worksheet
            var sheet = workbook.Worksheets[0];
            // access CellsCollection of first worksheet
            var cells = sheet.Cells;
            // write HelloWorld to cells A1
            cells["A15"].Value = "";
            // save spreadsheet to disc
            workbook.Save(sUrlFile);
            workbook.Dispose();
            workbook = null;

您可以使用ExcelXmlWriter。

它工作得很好。

Syncfusion Essential XlsIO可以做到这一点。它对Microsoft office没有依赖性，并且对不同的平台也有特定的支持。

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代码示例：

//Creates a new instance for ExcelEngine.
ExcelEngine excelEngine = new ExcelEngine();
//Loads or open an existing workbook through Open method of IWorkbooks
IWorkbook workbook = excelEngine.Excel.Workbooks.Open(fileName);
//To-Do some manipulation|
//To-Do some manipulation
//Set the version of the workbook.
workbook.Version = ExcelVersion.Excel2013;
//Save the workbook in file system as xlsx format
workbook.SaveAs(outputFileName);

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