导出 Java Swing JTable header 到 Excel

Question

在我的应用程序中，我已经将 table 内容导出到 Excel，但结果排除了 table header。想知道如何将 JTable 导出到 Excel 包含 table header？我尝试了几种方法，但仍然无法在 excel 中看到 table header，以下是我的代码：

    defautTableModel = new DefaultTableModel(null,columnNames){
        @Override
        public boolean isCellEditable(int row, int column) {
            return false;
        }
    };

    // the jTable row are generated dynamically.
    final JTable jTable = new JTable(defautTableModel);

    jTable.setLocation(20,60);
    jTable.setSize(950,450);
    jTable.setRowHeight(25);

    JTableHeader jTableHeader = jTable.getTableHeader();
    jTableHeader.setLocation(20,30);
    jTableHeader.setSize(950,30);
    jTableHeader.setFont(new Font(null, Font.BOLD, 16));
    jTableHeader.setResizingAllowed(true);
    jTableHeader.setReorderingAllowed(true);

    jTable.add(jTableHeader);

    JScrollPane tablePanel = new JScrollPane(jTable);
    tablePanel.setLocation(10,10);
    tablePanel.setSize(960,400);

    // export data to excel method 

    public void exportToExcel(){
    XSSFWorkbook wb = new XSSFWorkbook();
    XSSFSheet sheet = wb.createSheet();
    for (int i = 0; i < defautTableModel.getRowCount(); i++) {
        Row = sheet.createRow(i);
        for (int j = 0; j < defautTableModel.getColumnCount(); j++) {
            Cell = Row.createCell(j);
            try {
                if (defautTableModel.getValueAt(i,j) != null){
                    Cell.setCellValue(defautTableModel.getValueAt(i,j).toString());
                    FileOutputStream fileOut = new FileOutputStream(Constant.Path_TestData_Output);
                    wb.write(fileOut);
                    fileOut.flush();
                    fileOut.close();
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }
}

Answer 1

您只访问数据列，您需要先获取 header 数据列。您可以通过不同的方式实现它，或者使用方法 getColumnName 正如 ThomasEdwin 在他的评论中提到的那样，或者使用您提供给模型构造函数的 columnNames 变量：new DefaultTableModel(null,columnNames)

希望对您有所帮助

Answer 2

将 JTable 索引导出 Java Swing JTable header 到 Excel

private static void writeToExcell(DefaultTableModel TabR ,TableColumnModel tableM) throws IOException {
try
{
    JFileChooser fileChooser = new JFileChooser();
   int retval = fileChooser.showSaveDialog(fileChooser);

   if (retval == JFileChooser.APPROVE_OPTION) {
       File file = fileChooser.getSelectedFile();
       if (file != null) {
           if (!file.getName().toLowerCase().endsWith(".xls")) {
               file = new File(file.getParentFile(), file.getName() + ".xls");

    @SuppressWarnings("resource")
 Workbook wb = new HSSFWorkbook();
    @SuppressWarnings("unused")
 CreationHelper createhelper = wb.getCreationHelper();
    org.apache.poi.ss.usermodel.Sheet sheet = wb.createSheet();
    org.apache.poi.ss.usermodel.Row row = null;

    org.apache.poi.ss.usermodel.Cell cell = null;
    

     for (int a=0;a<TabR.getRowCount();a++)
    {
        row = sheet.createRow(a+1); /*  We create an Excel layer Row. 
                We understand how many rows are in 
                TabR with GetRowCount from TabR, the 
                DefaultTableModel of the current JTable, 
                and add one to it.*/
        
        for (int b=0;b<tableM.getColumnCount();b++) 
        {
         cell = row.createCell(b);/*  With the GetColumnCount 
                function of the existing JTable's 
                TableColumnModel, we create more 
                Column in the JTable.*/
         
            cell.setCellValue(TabR.getValueAt(a, b).toString()); /*we give the value of the cell. */
        }
    }
    
    for (int c=0;c<cell.getRowIndex();c++)
    {
        row = sheet.createRow(c);
        
        for (int d=0;d<tableM.getColumnCount();d++) 
        {
             
         cell = row.createCell(d);
            cell.setCellValue(tableM.getColumn(d).getHeaderValue().toString());
 
        }
    }
    FileOutputStream out = new FileOutputStream(file);
    wb.write(out);
    out.close();

       }

       }
       }

} catch (FileNotFoundException ex) {
    Logger.getLogger(B_anaEk.class.getName()).log(Level.ALL, null, ex);
} catch (IOException ex) {
    Logger.getLogger(B_anaEk.class.getName()).log(Level.ALL, null, ex);
}

导出 Java Swing JTable header 到 Excel

Export Java Swing JTable header to Excel

java

excel

swing

jtable