Java JTable 实现日历的示例

这里提供一个Java JTable 实现日历的示例的完整攻略：

1. 实现一个基本的日历

步骤一：创建一个 JFrame，并添加一个 JTable，用来显示日历

public class Calendar extends JFrame {
    private final int WIDTH = 600;
    private final int HEIGHT = 400;

    // 创建一个表格，用来显示日历
    private JTable calendarTable = new JTable(6, 7);
    private JScrollPane scrollPane = new JScrollPane(calendarTable);

    public Calendar() {
        setTitle("Calendar");
        setSize(WIDTH, HEIGHT);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setLocationRelativeTo(null);

        // 添加表格到窗口中
        add(scrollPane, BorderLayout.CENTER);

        setVisible(true);
    }

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

步骤二：用数据填充表格，显示日历

public class Calendar extends JFrame {
    private final int WIDTH = 600;
    private final int HEIGHT = 400;

    // 创建一个表格，用来显示日历
    private JTable calendarTable = new JTable(6, 7);
    private JScrollPane scrollPane = new JScrollPane(calendarTable);

    public Calendar() {
        setTitle("Calendar");
        setSize(WIDTH, HEIGHT);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setLocationRelativeTo(null);

        // 添加表格到窗口中
        add(scrollPane, BorderLayout.CENTER);

        // 获取当前月份和年份，并计算出当前月份的天数
        Calendar calendar = Calendar.getInstance();
        int currentMonth = calendar.get(Calendar.MONTH);
        int currentYear = calendar.get(Calendar.YEAR);
        int daysInMonth = calendar.getActualMaximum(Calendar.DAY_OF_MONTH);
        int firstDayOfWeek = calendar.get(Calendar.DAY_OF_WEEK);

        // 将天数填充到表格中
        int row = 0;
        int column = firstDayOfWeek - 1;
        for (int day = 1; day <= daysInMonth; day++) {
            calendarTable.setValueAt(day, row, column);
            column++;
            if (column > 6) {
                column = 0;
                row++;
            }
        }

        setVisible(true);
    }

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

2. 实现一个带有数据修改的日历

步骤一：创建 TableModel，并添加到 JTable 中

public class CalendarTableModel extends AbstractTableModel {
    private static final String[] columnNames = {"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"};
    private static final int ROW_COUNT = 6;
    private static final int COLUMN_COUNT = 7;
    private int[][] data;

    public CalendarTableModel() {
        data = new int[ROW_COUNT][COLUMN_COUNT];
    }

    public void setData(int[][] data) {
        this.data = data;
        fireTableDataChanged();
    }

    @Override
    public int getRowCount() {
        return ROW_COUNT;
    }

    @Override
    public int getColumnCount() {
        return COLUMN_COUNT;
    }

    @Override
    public Object getValueAt(int rowIndex, int columnIndex) {
        return data[rowIndex][columnIndex];
    }

    @Override
    public void setValueAt(Object aValue, int rowIndex, int columnIndex) {
        if (aValue instanceof Integer) {
            data[rowIndex][columnIndex] = (Integer) aValue;
            fireTableCellUpdated(rowIndex, columnIndex);
        }
    }

    @Override
    public boolean isCellEditable(int rowIndex, int columnIndex) {
        return true;
    }

    @Override
    public String getColumnName(int column) {
        return columnNames[column];
    }
}

public class ModifiedCalendar extends JFrame {
    private final int WIDTH = 600;
    private final int HEIGHT = 400;

    // 创建一个表格，用来显示日历
    private JTable calendarTable;
    private JScrollPane scrollPane;

    public ModifiedCalendar() {
        setTitle("Calendar");
        setSize(WIDTH, HEIGHT);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setLocationRelativeTo(null);

        // 初始化表格数据
        int[][] data = new int[6][7];
        Calendar calendar = Calendar.getInstance();
        int currentMonth = calendar.get(Calendar.MONTH);
        int currentYear = calendar.get(Calendar.YEAR);
        int daysInMonth = calendar.getActualMaximum(Calendar.DAY_OF_MONTH);
        int firstDayOfWeek = calendar.get(Calendar.DAY_OF_WEEK);
        int row = 0;
        int column = firstDayOfWeek - 1;
        for (int day = 1; day <= daysInMonth; day++) {
            data[row][column] = day;
            column++;
            if (column > 6) {
                column = 0;
                row++;
            }
        }

        // 创建 TableModel
        CalendarTableModel model = new CalendarTableModel();
        model.setData(data);

        // 添加 TableModel 到 JTable 中
        calendarTable = new JTable(model);
        scrollPane = new JScrollPane(calendarTable);
        add(scrollPane, BorderLayout.CENTER);

        setVisible(true);
    }

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

步骤二：实现数据修改，并更新表格

public class ModifiedCalendar extends JFrame {
    private final int WIDTH = 600;
    private final int HEIGHT = 400;

    // 创建一个表格，用来显示日历
    private JTable calendarTable;
    private JScrollPane scrollPane;

    // 初始化表格数据
    private int[][] data = new int[6][7];
    Calendar calendar = Calendar.getInstance();
    int currentMonth = calendar.get(Calendar.MONTH);
    int currentYear = calendar.get(Calendar.YEAR);
    int daysInMonth = calendar.getActualMaximum(Calendar.DAY_OF_MONTH);
    int firstDayOfWeek = calendar.get(Calendar.DAY_OF_WEEK);
    int row = 0;
    int column = firstDayOfWeek - 1;
    for (int day = 1; day <= daysInMonth; day++) {
        data[row][column] = day;
        column++;
        if (column > 6) {
            column = 0;
            row++;
        }
    }

    public ModifiedCalendar() {
        setTitle("Calendar");
        setSize(WIDTH, HEIGHT);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setLocationRelativeTo(null);

        // 创建 TableModel
        CalendarTableModel model = new CalendarTableModel();
        model.setData(data);

        // 添加 TableModel 到 JTable 中
        calendarTable = new JTable(model);
        scrollPane = new JScrollPane(calendarTable);
        add(scrollPane, BorderLayout.CENTER);

        // 监听数据修改事件，并更新表格
        model.addTableModelListener(new TableModelListener() {
            @Override
            public void tableChanged(TableModelEvent e) {
                int row = e.getFirstRow();
                int column = e.getColumn();
                TableModel model = (TableModel) e.getSource();
                int value = (Integer) model.getValueAt(row, column);
                System.out.println("row: " + row + ", column: " + column + ", value: " + value);
            }
        });

        setVisible(true);
    }

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

以上是Java JTable 实现日历的两个示例攻略，希望对您有所帮助。