JTable - 一列中的多个单元格编辑器答案

【问题标题】：JTable - multiple cell editors in one columnJTable - 一列中的多个单元格编辑器
【发布时间】：2010-07-26 10:54:17
【问题描述】：

我希望我的JTable 对单个列中的不同单元格使用不同的单元格编辑器。想象一个两列标签值表，如：

Name          | Value
--------------+--------------------------------
Identifier    | ST33442 (string editor)
Purchase Date | 7/7/10 (custom calendar editor)
Status        | Broken (combo editor)

如何动态构建编辑器？像TableCellEditorFactory 这样的东西会很完美。

【问题讨论】：

标签： java swing jtable

【解决方案1】：

您必须实现自己的单元格编辑器并将其分配给列。您可能应该对单元格渲染器执行相同的操作（例如，布尔值将被渲染为复选框而不是“true”/“false”）。

public class TableEditorTest {

    public static void main(String[] args) {
        Object[][] data = new Object[][] {{"Identifier", "ST33442"}, {"Purchase Date", new Date()}, {"Status", Boolean.FALSE}};
        String[] columnNames = new String[] {"Name", "Value"};
        TableModel model = new DefaultTableModel(data, columnNames);
        JTable table = new JTable(model);
        JScrollPane scrollPane = new JScrollPane(table);
        JFrame frame = new JFrame();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.getContentPane().add(scrollPane);
        frame.pack();
        frame.setVisible(true);

        table.getColumnModel().getColumn(1).setCellEditor(new CustomTableCellEditor());
    }

    public static class CustomTableCellEditor extends AbstractCellEditor implements TableCellEditor {
        private TableCellEditor editor;

        @Override
        public Object getCellEditorValue() {
            if (editor != null) {
                return editor.getCellEditorValue();
            }

            return null;
        }

        @Override
        public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int row, int column) {
            if (value instanceof Date) {
                editor = new DatePickerCellEditor();
            } else if (value instanceof String) {
                editor = new DefaultCellEditor(new JTextField());
            } else if (value instanceof Boolean) {
                editor = new DefaultCellEditor(new JCheckBox());
            }

            return editor.getTableCellEditorComponent(table, value, isSelected, row, column);
        }
    }
}

注意DatePickerCellEditor 来自 SwingX

【讨论】：

【解决方案2】：

我想到了另一个解决方案，因为我想重用默认编辑器……下面的类重新定义了 getColumnClass 以获得不同的答案。据我测试，它工作正常，我可以使用 setDefaultEditor 等等。您会注意到，可以增强此行为以仅将其应用于所需的列。

public class JXMultiTypeColumnTable extends JXTable {

private Map<Integer, Class<?>> viewedClassByColumn = new HashMap<Integer, Class<?>>();

public JXMultiTypeColumnTable(Object[][] rowData, Object[] columnNames) {
    super(rowData, columnNames);
}

public JXMultiTypeColumnTable(int numRows, int numColumns) {
    super(numRows, numColumns);
}

public JXMultiTypeColumnTable(TableModel dm, TableColumnModel cm, ListSelectionModel sm) {
    super(dm, cm, sm);
}

public JXMultiTypeColumnTable(TableModel dm, TableColumnModel cm) {
    super(dm, cm);
}

public JXMultiTypeColumnTable(TableModel dm) {
    super(dm);
}

public JXMultiTypeColumnTable() {
}

@Override
public Class<?> getColumnClass(int column) {
    Class<?> recordedClass = this.viewedClassByColumn.get(column);
    if (recordedClass != null) {
        return recordedClass;
    }
    return super.getColumnClass(column);
}

private void recordViewedClass(int row, int column) {
    this.viewedClassByColumn.put(column,
            this.getModel().getValueAt(
            this.convertRowIndexToModel(row), this.convertColumnIndexToModel(column))
            .getClass());
}

@Override
public TableCellRenderer getCellRenderer(int row, int column) {
    this.recordViewedClass(row, column);
    return super.getCellRenderer(row, column);
}

@Override
public TableCellEditor getCellEditor(int row, int column) {
    this.recordViewedClass(row, column);
    return super.getCellEditor(row, column);
}

}

注意可以扩展JTable 而不是JXTable。

【讨论】：