java - 使用 JXL (JExcel) 更新 Excel 工作表导致文件大小为 0 KB

Question

我在使用 JExcel“jxl”库写入现有 Excel 文件时遇到问题。我有一个包含工作表数据的 jTable，当用户按下删除按钮时，应从工作表和表模型中删除所选行。在下面的代码中，它从 jTable 模型中删除，但不删除从床单上!实际上，按下删除按钮后，整个工作簿都变成了 0 KB!你能告诉我出了什么问题吗？

“注意:我尝试将复制的工作簿的名称更改为另一个名称并删除了这一行 (sheet.removeRow(deletedrow+1); )，它很好地复制了原始工作簿。我认为问题发生在删除线”

     private void removebuttonActionPerformed(java.awt.event.ActionEvent evt) {                                             
    int deletedrow;
    deletedrow = logtable.getSelectedRow();
    int dialogButton = JOptionPane.YES_NO_OPTION;
    int dialogResult = JOptionPane.showConfirmDialog(this, "Are you sure you want to delete this record from "+ sheetname + " sheet?", "Confirmation Message", dialogButton);
    if (dialogResult == 0) {

        try {


            Workbook workbook = Workbook.getWorkbook(new File("path/" + wbname + ".xls"));

            WritableWorkbook copy = Workbook.createWorkbook(new File("path/" +wbname +".xls"), workbook);
            WritableSheet sheet = copy.getSheet(sheetname);
            sheet.removeRow(deletedrow + 1);

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

            JOptionPane.showMessageDialog(this, "The record has been deleted from (" + sheetname + ") successfully", "Information Message", JOptionPane.INFORMATION_MESSAGE);

            model.removeRow(deletedrow);
            logtable.setModel(model);
        }//try
        catch (IOException | BiffException | WriteException | HeadlessException e) {
            e.printStackTrace();

        }
    }//if confirmation message = yes

}                                            

Answer 1

我也遇到了同样的问题，你说得对，问题出在removeRow 上。它非常适合最后一行，但无法删除中间行。

我所做的是将以下行复制回一行，并删除最后一行。这是代码:

for (int rowIdx = deletedrow; rowIdx < sheet.getRows(); rowIdx++) {
                    for (int colIdx = 0; colIdx < sheet.getColumns(); colIdx++) {
                        Cell readCell = sheet.getCell(colIdx, rowIdx+1);
                        Label label = new Label(colIdx, rowIdx, readCell.getContents());
                        CellFormat readFormat = readCell.getCellFormat();
                        if (readFormat != null) {

                            label.setCellFormat(readFormat);
                        }
                        sheet.addCell(label);
                    }

                }
sheet.removeRow(sheet.getRows());