Jtable保留列宽

Question

我有一个Jtable，我在其中使用setDataVector函数设置数据。它工作正常，但假设如果我只是通过使用鼠标拖动来更改了某些列宽，并且在同一表中加载了新数据之后，该列的宽度将重置到它的默认位置。所以基本上我想保留该宽度，即使加载新数据也是如此。

Answer 1

When you use the setDataVector() method the structure of the table may change so the table automatically recreates the TableColumnModel and you lose your customization.

When you create the JTable the first time use code like:

JTable table = new JTable(...);
table.setAutoCreateColumnsFromModel( false );

to prevent the TableColumnModel from being recreated.

Answer 2

That happens because when you use setDataVector() according to docs that recreates columns and your column width changes to default.

Try to use setAutoCreateColumnsFromModel() to prevent that behavior.

Answer 3

As you use a custom table model. Don't use setDateVector() it recreates the columns. You can manage width of column using setPreferredWidth() method manually as:

      table.setModel(buildTableModel(rs));
      TableColumnModel tcm = table.getColumnModel();
      tcm.getColumn(0).setPreferredWidth(80);  
      tcm.getColumn(1).setPreferredWidth(200);  
      tcm.getColumn(2).setPreferredWidth(100);  
      tcm.getColumn(3).setPreferredWidth(100);  
      tcm.getColumn(4).setPreferredWidth(100);