SelectionListener listener = new SelectionListener(jtable);
jtable.getSelectionModel().addListSelectionListener(listener);
public class SelectionListener implements ListSelectionListener {
        JTable table;

        SelectionListener(JTable table) {
            this.table = table;
        }
        public void valueChanged(ListSelectionEvent e) {
            if (e.getSource() == table.getColumnModel().getSelectionModel()
                   && table.getColumnSelectionAllowed() ){
                int firstRow = e.getFirstIndex();
                int lastRow = e.getLastIndex();
                // 事件处理...
            }
        }
    }