在 JTable 列中设置 JXDatePicker 的最小日期

Question

如何在我的 JTable 列中为 JXDatePicker 设置最小日期。也就是说，我只需要在 JXDatePicker 中显示/启用大于当前日期的日期，应在日历中禁用低于当前日期的日期，以便用户无法选择那些日期。怎么做？请帮助我。下面是我的代码。

import java.util.Date;

import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.SwingUtilities;
import javax.swing.table.TableColumn;

import org.jdesktop.swingx.table.DatePickerCellEditor;


public class TableWithDate {

private static void createAndShowGUI() {
    JFrame frame = new JFrame("TableWithDate");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    JTable table = new JTable(new Object[][] { { "1", new Date() } },
            new Object[] { "Id", "Time" });

    TableColumn dateColumn = table.getColumnModel().getColumn(1);
    dateColumn.setCellEditor(new DatePickerCellEditor());

    JScrollPane scrollPane = new JScrollPane(table); 

    frame.add(scrollPane);
    frame.pack();
    frame.setVisible(true);
}

public static void main(String args[]) {
    SwingUtilities.invokeLater(new Runnable() {
        public void run() {
            createAndShowGUI();
        }
    });
}
}

Answer 1

JXDatePicker 字段具有 protected 访问权限，您必须扩展 DatePickerCellEditor 并提供该功能...

public class BoundDatePickerCellEditor extends DatePickerCellEditor {

    public BoundDatePickerCellEditor() {
        super();
    }

    public BoundDatePickerCellEditor(DateFormat dateFormat) {
        super(dateFormat);
    }

    public void setLowerBound(Date date) {
        datePicker.getMonthView().setLowerBound(date);          
    }

    public void setUpperBound(Date date) {
        datePicker.getMonthView().setLowerBound(date);          
    }

}

可运行示例...

import java.awt.EventQueue;
import java.text.DateFormat;
import java.util.Date;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.table.TableColumn;
import org.jdesktop.swingx.table.DatePickerCellEditor;

public class Test {

    public static void main(String[] args) {
        new Test();
    }

    public Test() {
        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                try {
                    UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
                } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
                    ex.printStackTrace();
                }
                JTable table = new JTable(new Object[][]{{"1", new Date()}},
                                new Object[]{"Id", "Time"});

                TableColumn dateColumn = table.getColumnModel().getColumn(1);
                BoundDatePickerCellEditor picker = new BoundDatePickerCellEditor();
                picker.setLowerBound(new Date());
                dateColumn.setCellEditor(picker);

                JFrame frame = new JFrame("Testing");
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                frame.add(new JScrollPane(table));
                frame.pack();
                frame.setLocationRelativeTo(null);
                frame.setVisible(true);
            }
        });
    }

    public class BoundDatePickerCellEditor extends DatePickerCellEditor {

        public BoundDatePickerCellEditor() {
            super();
        }

        public BoundDatePickerCellEditor(DateFormat dateFormat) {
            super(dateFormat);
        }

        public void setLowerBound(Date date) {
            datePicker.getMonthView().setLowerBound(date);
        }

        public void setUpperBound(Date date) {
            datePicker.getMonthView().setLowerBound(date);
        }

    }
}

如果您今天也想排除，您可以使用类似...

Calendar cal = Calendar.getInstance();
cal.add(Calendar.DATE, 1);
picker.setLowerBound(cal.getTime());

...例如