JTable：覆盖 CTRL+C 行为

I have a JTable set on SINGLE_SELECTION mode, i.e. the user can only select one row at a time. I am trying to override the CTRL+C KeyListener so that it will copy the whole table to the clipboard.

目前，我在 JTable 的构造函数中添加了一个 KeyListener：

public MyTable(AbstractTableModel model) {
    super(model);
    getSelectionModel().setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
    addKeyListener(new ExcelClipboardKeyAdapter(this));
}

KeyListener 看起来像这样：

public class ExcelClipboardKeyAdapter extends KeyAdapter {

    private static final String LINE_BREAK = System.lineSeparator();
    private static final String CELL_BREAK = "\t";
    private static final Clipboard CLIPBOARD = Toolkit.getDefaultToolkit().getSystemClipboard();
    private final JTable table;

    public ExcelClipboardKeyAdapter(JTable table) {
        this.table = table;
    }

    @Override
    public void keyReleased(KeyEvent event) {
        if (event.isControlDown()) {
            if (event.getKeyCode() == KeyEvent.VK_C) { // Copy                        
                copyToClipboard();
                System.out.println("here");
            }
        }
    }

    private void copyToClipboard() {
        int numCols = table.getColumnCount();
        int numRows = table.getRowCount();
        StringBuilder excelStr = new StringBuilder();
        for (int i = 0; i < numRows; i++) {
            for (int j = 0; j < numCols; j++) {
                excelStr.append(escape(table.getValueAt(i, j)));
                if (j < numCols - 1) {
                    excelStr.append(CELL_BREAK);
                }
            }
            excelStr.append(LINE_BREAK);
        }

        StringSelection sel = new StringSelection(excelStr.toString());
        CLIPBOARD.setContents(sel, sel);
    }

    private String escape(Object cell) {
        return (cell == null? "" : cell.toString().replace(LINE_BREAK, " ").replace(CELL_BREAK, " "));
    }
}

However, when I press CTRL+C, the keyreleased method is not called and does not print "here". The content of the clipboard only contains the selected line.

任何想法都会受到欢迎。

EDIT

实际上，它有时会工作几次，然后停止工作并再次复制一行......奇怪......

将我的评论移至答案中：

实现一个自定义 TransferHandler，它创建“excel-transferable”并在表中使用它（dragEnabled == true） - 适用于目标操作系统的键绑定 - 然后自动连接