java 设置 JTable 中的列顺序
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Set order of columns in JTable
提问by Tobias
I have a JTable with some columns. I have a HashMap of the column identifier mapped to the position in the view, for example:
我有一个带有一些列的 JTable。我有一个列标识符的 HashMap 映射到视图中的位置，例如：
TableHeader1 | TableHeader2 | TableHeader3
sth. sth. sth.
I know that:
我知道：
TableHeader1 -> position 0
TableHeader2 -> position 1
TableHeader3 -> position 2
Now I want to reorder the columns. I know that there is a function called moveColumn(A, B) within the JTable class. This moves a column from A to B, and B is putted left or right. My problem is, I want to order the whole table in a specific way, how can I do this? If I use moveColumn, I cannot know where B has been moved, in 5 out of 10 cases it might be the right side and in the other cases the wrong side.
现在我想对列重新排序。我知道 JTable 类中有一个名为 moveColumn(A, B) 的函数。这会将一列从 A 移到 B，然后将 B 放在左侧或右侧。我的问题是，我想以特定方式订购整张桌子，我该怎么做？如果我使用 moveColumn，我不知道 B 被移动到哪里，在 10 种情况中的 5 种情况下它可能是正确的一侧，而在其他情况下则是错误的一侧。
Hope you understand my problem :-)
希望你明白我的问题:-)
回答by Guillaume
You can change the columns order by removing all of them and adding them in the right order:
您可以通过删除所有列并按正确顺序添加它们来更改列顺序：
public static void setColumnOrder(int[] indices, TableColumnModel columnModel) {
TableColumn column[] = new TableColumn[indices.length];
for (int i = 0; i < column.length; i++) {
column[i] = columnModel.getColumn(indices[i]);
}
while (columnModel.getColumnCount() > 0) {
columnModel.removeColumn(columnModel.getColumn(0));
}
for (int i = 0; i < column.length; i++) {
columnModel.addColumn(column[i]);
}
}
回答by Stephan
Based on @Guillaume answer I found a way to do that without the need to remove all columns and add them again.
基于@Guillaume 的回答，我找到了一种无需删除所有列并再次添加它们的方法。
public static void setColumnOrder(int[] indices, JTable table, TableColumnModel columnModel) {
for (int i = 0; i < indices.length; i++) {
columnModel.moveColumn(i, table.convertColumnIndexToView(indices[i]));
}
}
This works better for me because with (SwingX) JXTable, the order of the invisible columns is not modified.
这对我来说效果更好，因为使用 (SwingX) JXTable，不可见列的顺序不会被修改。
回答by Qwerky
OK how about this. Might be a bit left field.
好的，这个怎么样。可能有点左场。
Extend TableColumnand give your new class a positionproperty. Have it implement Comparableand use the positionto compare columns.
扩展TableColumn并给你的新类一个position属性。让它实现Comparable并使用position来比较列。
Next, extend DefaultTableColumnModeland store TableColumns in an ordered list.
接下来，将s扩展DefaultTableColumnModel并存储TableColumn在有序列表中。
Your JTable should now display columns according to their position. Untested but it sounds interesting so I might give it a go later.
您的 JTable 现在应该根据它们的position. 未经测试，但听起来很有趣，所以我以后可能会试一试。
回答by camickr
If you want to reorder by column name then you can check out the Table Column Reorderingsuggestion.
如果您想按列名重新排序，那么您可以查看表列重新排序建议。
