Java Swing：在JTable中编辑单元格时如何获取上一个值和当前值？

Question

I have a table that contains data from mysql. I want to modify this data when I select any row and then the modification is done to the database.

Answer 1

You could useTableCellListener to identify when an actual change in the cell data occurs, allowing you to retrieve the current value of the cell (the new value) using tcl.getNewValue() , as well as the old one using tcl.getOldValue() . Additionally, it allows you to get the row and column indices of the cell that has been modified.

Example as given in the source above:

Action action = new AbstractAction()
{
    public void actionPerformed(ActionEvent e)
    {
        TableCellListener tcl = (TableCellListener)e.getSource();
        System.out.println("Row   : " + tcl.getRow());
        System.out.println("Column: " + tcl.getColumn());
        System.out.println("Old   : " + tcl.getOldValue());
        System.out.println("New   : " + tcl.getNewValue());
    }
};

TableCellListener tcl = new TableCellListener(table, action);  // where table is the instance of your JTable