在 Excel 文件中追加数据

Question

我正在尝试编写一个将数据附加到Java中的Excel文件的程序。我掌握了以下代码。但是它将内容重写在Excel文件中，而不是附加到它。请帮助我完成此操作。

public class jExcel
{
    static WritableWorkbook workbook;
    public static void main(String args[])throws Exception
    {
        workbook = Workbook.createWorkbook((new File("D:\\0077\\my2.xls")));
        WritableSheet sheet = workbook.createSheet("First Sheett",1);
        Label label = new Label(5,2,"ssssssssss");
        sheet.addCell(label);
        workbook.write();
        workbook.close();
    }
}

Answer 1

//写入XLS

    WritableWorkbook workbook = Workbook.createWorkbook(new File("D:\\output.xls"));
    WritableSheet sheet = workbook.createSheet("First Sheet", 0);
    Label label = new Label(0, 2, "A label record"); 
    sheet.addCell(label);
    workbook.write(); 
    workbook.close();

    //MODIFY XLS

    Workbook workbook1 = Workbook.getWorkbook(new File("D:\\output.xls"));
    WritableWorkbook copy = Workbook.createWorkbook(new File("D:\\output.xls"), workbook1);
    WritableSheet sheet2 = copy.getSheet(0); 
    //WritableCell cell = sheet2.getWritableCell(5, 2); 

    copy.write();
    copy.close();

Answer 2

使用“getWorkbook(java.io.File file)”来获取现有的 Excel，而不是使用 createWorkbook。
然后使用 getSheet(int index) 检索适当的工作表。

对于上面检索到的工作表，使用“addCell(WritableCell cell)”将单元格附加到工作表。

Workbook workbook = Workbook.getWorkbook(new File(""D:\\0077\\my2.xls""));
WritableWorkbook copy = Workbook.createWorkbook(new File("output.xls"), workbook);
WritableSheet sheet2 = copy.getSheet(1); 
Label label = new Label(5,2,"ssssssssss"); 
sheet2.addCell(label); 

您会在这里找到很多例子。
http://www.andykhan.com/jexcelapi/tutorial.html

Answer 3

从文件打开工作簿后，请执行以下操作：

WritableWorkbook copy = Workbook.createWorkbook(
   new File(""D:\\0077\\my2_copy.xls""), 
   workbook
);

您将获得打开的工作簿的副本。在该副本中进行所需的更改并保存。