java实现可视化日历

下面是java实现可视化日历的完整攻略。

1.获取用户输入的年份和月份

在程序中，需要获取用户输入的年份和月份，才能正确地生成日历。可以通过Scanner类实现从控制台读取用户输入，示例代码如下：

import java.util.Scanner;

public class CalendarGenerator {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.print("请输入要生成日历的年份（例如2019）：");
        int year = scanner.nextInt();
        System.out.print("请输入要生成日历的月份（例如8）：");
        int month = scanner.nextInt();
        scanner.close();

        // TODO: 接下来生成日历
    }
}

2.生成指定年月的日历数据

获取用户输入的年份和月份之后，需要根据这些数据生成该月的日历数据。具体可以使用Java的Calendar类实现，示例代码如下：

import java.util.Calendar;

public class CalendarGenerator {
    public static void main(String[] args) {
        int year = 2019;
        int month = 8;

        Calendar cal = Calendar.getInstance();
        cal.set(Calendar.YEAR, year);
        cal.set(Calendar.MONTH, month - 1);
        cal.set(Calendar.DAY_OF_MONTH, 1);

        int firstDayOfWeek = cal.get(Calendar.DAY_OF_WEEK) - 1;
        int maxDayOfMonth = cal.getActualMaximum(Calendar.DAY_OF_MONTH);

        int[][] data = new int[6][7];
        for (int i = 0, day = 1 - firstDayOfWeek; day <= maxDayOfMonth; i++) {
            for (int j = 0; j < 7; j++, day++) {
                if (day < 1 || day > maxDayOfMonth) {
                    data[i][j] = 0;
                } else {
                    data[i][j] = day;
                }
            }
        }

        // TODO: 接下来将日历数据显示出来
    }
}

3.将日历数据可视化

生成日历数据之后，就可以将其可视化了。可以使用Swing或JavaFX来实现可视化日历，这里以Swing为例。示例代码如下：

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Font;
import java.awt.GridLayout;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;

public class CalendarViewer {
    public static void main(String[] args) {
        int[][] data = { { 0, 0, 0, 0, 1, 2, 3 }, { 4, 5, 6, 7, 8, 9, 10 }, { 11, 12, 13, 14, 15, 16, 17 }, { 18, 19, 20, 21, 22, 23, 24 }, { 25, 26, 27, 28, 29, 30, 0 }, { 0, 0, 0, 0, 0, 0, 0 } }; // 示例数据，实际应该使用上一步生成的日历数据

        JLabel title = new JLabel("2019年8月日历", JLabel.CENTER);
        title.setFont(new Font("宋体", Font.BOLD, 20));

        JPanel weekdayPanel = new JPanel(new GridLayout(1, 7));
        weekdayPanel.setBackground(Color.lightGray);
        String[] weekdays = { "日", "一", "二", "三", "四", "五", "六" };
        for (String weekday : weekdays) {
            JLabel label = new JLabel(weekday, JLabel.CENTER);
            label.setFont(new Font("宋体", Font.PLAIN, 16));
            weekdayPanel.add(label);
        }

        JPanel dataPanel = new JPanel(new GridLayout(6, 7));
        dataPanel.setBackground(Color.white);
        for (int i = 0; i < 6; i++) {
            for (int j = 0; j < 7; j++) {
                JLabel label = new JLabel(String.valueOf(data[i][j]), JLabel.CENTER);
                label.setFont(new Font("宋体", Font.PLAIN, 16));
                dataPanel.add(label);
            }
        }

        JFrame frame = new JFrame("日历");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setLayout(new BorderLayout());
        frame.add(title, BorderLayout.NORTH);
        frame.add(weekdayPanel, BorderLayout.CENTER);
        frame.add(dataPanel, BorderLayout.SOUTH);
        frame.pack();
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);
    }
}

示例1：如何选择月份界面：

输入年份和月份后，可以显示选择月份的界面。具体实现可以使用Swing的JComboBox组件和ActionListener实现。示例代码如下：

import java.awt.BorderLayout;
import java.awt.Font;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;

public class CalendarGenerator {
    public static void main(String[] args) {
        int year = 2019;
        int month = 8;

        JLabel title = new JLabel(year + "年" + month + "月日历", JLabel.CENTER);
        title.setFont(new Font("宋体", Font.BOLD, 20));

        JPanel buttonPanel = new JPanel(new GridLayout(1, 2));
        JButton prevButton = new JButton("上一月");
        JButton nextButton = new JButton("下一月");
        buttonPanel.add(prevButton);
        buttonPanel.add(nextButton);

        JComboBox<Integer> monthComboBox = new JComboBox<Integer>(new Integer[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 });
        monthComboBox.setSelectedIndex(month - 1);
        monthComboBox.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                int newMonth = (int)monthComboBox.getSelectedItem();
                title.setText(year + "年" + newMonth + "月日历");
                // TODO: 重新生成日历数据
            }
        });

        JPanel controlPanel = new JPanel(new BorderLayout());
        controlPanel.add(buttonPanel, BorderLayout.WEST);
        controlPanel.add(monthComboBox, BorderLayout.CENTER);

        // TODO: 在上一周的代码基础上，将页面改为这种形式
    }
}

示例2：如何实现双击单元格弹出对话框：

用户在查看日历时，可以通过双击某一个单元格，弹出对话框，显示该日的详细信息。具体实现可以使用Swing的JTable组件和MouseListener实现。示例代码如下：

import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.GridLayout;
import java.awt.Point;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.SwingConstants;
import javax.swing.table.DefaultTableModel;

public class CalendarViewer {
    public static void main(String[] args) {
        int[][] data = { { 0, 0, 0, 0, 1, 2, 3 }, { 4, 5, 6, 7, 8, 9, 10 }, { 11, 12, 13, 14, 15, 16, 17 }, { 18, 19, 20, 21, 22, 23, 24 }, { 25, 26, 27, 28, 29, 30, 0 }, { 0, 0, 0, 0, 0, 0, 0 } };

        String[] columns = { "周日", "周一", "周二", "周三", "周四", "周五", "周六" };
        DefaultTableModel model = new DefaultTableModel(data, columns) {
            private static final long serialVersionUID = 1L;
            public boolean isCellEditable(int row, int column) {
                return false;
            }
        };
        JTable table = new JTable(model);
        table.setRowHeight(30);
        table.setFont(new Font("宋体", Font.PLAIN, 16));

        table.addMouseListener(new MouseAdapter() {
            public void mouseClicked(MouseEvent e) {
                if (e.getClickCount() == 2) {
                    Point point = e.getPoint();
                    int row = table.rowAtPoint(point);
                    int col = table.columnAtPoint(point);
                    int day = (int)table.getValueAt(row, col);
                    if (day > 0) {
                        JDialog dialog = new JDialog((JFrame)null, "日历详细信息");
                        dialog.setPreferredSize(new Dimension(300, 200));
                        dialog.setResizable(false);
                        dialog.setLocationRelativeTo(null);

                        JLabel label = new JLabel("2019年8月" + day + "日", JLabel.CENTER);
                        label.setFont(new Font("宋体", Font.BOLD, 20));

                        JPanel panel = new JPanel(new GridLayout(1, 1));
                        panel.setFont(new Font("宋体", Font.PLAIN, 16));
                        panel.add(new JLabel("这里显示该日的详细信息。", SwingConstants.CENTER));

                        dialog.add(label, BorderLayout.NORTH);
                        dialog.add(new JScrollPane(panel), BorderLayout.CENTER);

                        dialog.pack();
                        dialog.setVisible(true);
                    }
                }
            }
        });

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

以上就是Java实现可视化日历的攻略，希望对您有所帮助。

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1.获取用户输入的年份和月份

2.生成指定年月的日历数据

3.将日历数据可视化

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