Java-如何更改单元格时保存JTable? [英] Java-How to save JTable when cells are changed?

问题描述

我的JPanel中有一个JTable，我想知道如何保存编辑后的单元格.现在发生的是，当我编辑单元格并按ENTER键时，将显示新数据.但是当我关闭程序并再次打开它时，数据将恢复为原来的状态.

I have a JTable in my JPanel and i want to know how to save the edited cells. What happens right now is that when i edit a cell and press ENTER, the new data is shown.But when I close the program and open it again, the data changes back to what is originally was.

图片:

在编辑JTable时:

While editing the JTable:

重新启动程序后:

预先感谢

我想尝试从项目内的.txt文件中获取数据.我不太确定该怎么做.我不知道如何将保存的数据保存到.txt文件中，或者如何将其实现到JTable中.

I want to try to get the data from a .txt file inside my project. I'm not really sure how to do that. I dont know how to get the saved data into a .txt file or how to implement it into a JTable.

推荐答案

您应该使用TableModelListeners的方法，并在发生任何更改时触发对磁盘的写入(以与加载数据时相同的格式).所以，写类似

You should use the TableModelListeners' methods, and trigger a write to disk (in the same format that you use when loading the data) whenever something changes. So, write something like

myTable.getModel().addTableModelListener(new TableModelListener() {
   @Override
   public void tableChanged(TableModelEvent e) {
       // access the values of the model and save them to the file here
   }
});

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