JTable获取剪切板转置粘贴

您可以使用以下代码来实现JTable获取剪切板数据，并进行转置粘贴：

import javax.swing.*;
import javax.swing.table.DefaultTableModel;
import java.awt.*;
import java.awt.datatransfer.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class MainFrame extends JFrame {
    private JTable table;

    public MainFrame() {
        setTitle("JTable Clipboard Example");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        // 创建表格模型
        DefaultTableModel model = new DefaultTableModel();
        model.setColumnIdentifiers(new Object[]{"Column 1", "Column 2", "Column 3"});
        model.addRow(new Object[]{"1", "2", "3"});
        model.addRow(new Object[]{"4", "5", "6"});
        model.addRow(new Object[]{"7", "8", "9"});

        // 创建表格
        table = new JTable(model);
        JScrollPane scrollPane = new JScrollPane(table);
        getContentPane().add(scrollPane, BorderLayout.CENTER);

        // 创建按钮
        JButton btnPaste = new JButton("Paste");
        btnPaste.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                pasteFromClipboard();
            }
        });
        getContentPane().add(btnPaste, BorderLayout.SOUTH);

        pack();
    }

    private void pasteFromClipboard() {
        Clipboard clipboard = Toolkit.getDefaultToolkit().getSystemClipboard();
        Transferable transferable = clipboard.getContents(this);
        if (transferable != null && transferable.isDataFlavorSupported(DataFlavor.stringFlavor)) {
            try {
                String clipboardData = (String) transferable.getTransferData(DataFlavor.stringFlavor);
                String[] lines = clipboardData.split("\n");
                DefaultTableModel model = (DefaultTableModel) table.getModel();
                int startRow = table.getSelectedRow();
                int startCol = table.getSelectedColumn();

                for (int i = 0; i < lines.length; i++) {
                    String[] rowData = lines[i].split("\t");
                    for (int j = 0; j < rowData.length; j++) {
                        int row = startRow + i;
                        int col = startCol + j;
                        if (row < model.getRowCount() && col < model.getColumnCount()) {
                            model.setValueAt(rowData[j], row, col);
                        }
                    }
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            @Override
            public void run() {
                new MainFrame().setVisible(true);
            }
        });
    }
}

上述代码创建了一个包含JTable和一个"粘贴"按钮的窗口。点击"粘贴"按钮时，将会从剪贴板获取数据，并将其转置粘贴到JTable中。请注意，此代码仅处理文本数据，并且要求表格中至少有一个单元格被选中。