要求：编写具有图形用户界面（GUI)的日历组件显示日期和时间并进行适当 的功能扩充。 主要功能： 1、显示当月日历，当前日期、当前时间; 2、可查询任意月以及任意年的日历： 3、正常运行和退出程序。 4、每日具有记账功能，需要至少包含1）记账id：2）记账类型：2）支出费 用;3）关键字(关键宇写为一行，关键字数量不限，使用分号分割＜需查阅使 用>） 5、能够通过关键宇查询某一种类型的记账记录。 6、对当月记账类型的汇总：对特定关键字的记账汇总。Java代码

好的，下面是一个简单的Java代码示例，实现了您提出的主要功能：

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import java.sql.*;

public class CalendarApp extends JFrame implements ActionListener {
    private JLabel monthLabel, yearLabel;
    private JComboBox monthBox, yearBox;
    private JButton prevButton, nextButton, addButton, searchButton, summaryButton;
    private JTable table;
    private DefaultTableModel model;
    private JScrollPane scrollPane;
    private Connection conn;
    private PreparedStatement stmt;
    private ResultSet rs;

    public CalendarApp() {
        // 设置窗口标题
        setTitle("Calendar App");

        // 设置窗口大小
        setSize(800, 600);

        // 设置窗口位置
        setLocationRelativeTo(null);

        // 窗口关闭时退出程序
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        // 设置布局管理器
        setLayout(new BorderLayout());

        // 添加组件
        JPanel panel1 = new JPanel(new FlowLayout());
        monthLabel = new JLabel("Month:");
        panel1.add(monthLabel);
        String[] monthNames = new DateFormatSymbols().getMonths();
        monthBox = new JComboBox(monthNames);
        panel1.add(monthBox);
        yearLabel = new JLabel("Year:");
        panel1.add(yearLabel);
        int currentYear = Calendar.getInstance().get(Calendar.YEAR);
        Integer[] years = new Integer[10];
        for (int i = 0; i < 10; i++) {
            years[i] = currentYear - i;
        }
        yearBox = new JComboBox(years);
        panel1.add(yearBox);
        prevButton = new JButton("<");
        panel1.add(prevButton);
        nextButton = new JButton(">");
        panel1.add(nextButton);
        addButton = new JButton("Add");
        panel1.add(addButton);
        searchButton = new JButton("Search");
        panel1.add(searchButton);
        summaryButton = new JButton("Summary");
        panel1.add(summaryButton);
        add(panel1, BorderLayout.NORTH);

        JPanel panel2 = new JPanel(new BorderLayout());
        model = new DefaultTableModel();
        table = new JTable(model);
        scrollPane = new JScrollPane(table);
        panel2.add(scrollPane, BorderLayout.CENTER);
        add(panel2, BorderLayout.CENTER);

        // 添加监听器
        prevButton.addActionListener(this);
        nextButton.addActionListener(this);
        addButton.addActionListener(this);
        searchButton.addActionListener(this);
        summaryButton.addActionListener(this);

        // 连接数据库
        try {
            Class.forName("com.mysql.jdbc.Driver");
            conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/calendar", "root", "password");
            stmt = conn.prepareStatement("SELECT * FROM events WHERE year=? AND month=?");
        } catch (Exception e) {
            e.printStackTrace();
        }

        // 显示当前月份的日历
        showCalendar(Calendar.getInstance().get(Calendar.MONTH), Calendar.getInstance().get(Calendar.YEAR));
    }

    // 显示指定月份的日历
    private void showCalendar(int month, int year) {
        // 设置月份和年份的下拉框
        monthBox.setSelectedIndex(month);
        yearBox.setSelectedItem(year);

        // 清空表格数据
        model.setRowCount(0);

        // 显示表头
        model.addColumn("ID");
        model.addColumn("Type");
        model.addColumn("Amount");
        model.addColumn("Keywords");

        // 获取指定月份的日历
        Calendar cal = new GregorianCalendar(year, month, 1);
        int daysInMonth = cal.getActualMaximum(Calendar.DAY_OF_MONTH);
        int firstDayOfWeek = cal.get(Calendar.DAY_OF_WEEK);
        int rowNum = 0;
        int colNum = 0;
        Object[][] data = new Object[6][7];
        for (int i = 1; i <= daysInMonth; i++) {
            data[rowNum][colNum] = i;
            colNum++;
            if (colNum == 7) {
                colNum = 0;
                rowNum++;
            }
        }

        // 显示日历
        table.setDefaultRenderer(Object.class, new CalendarCellRenderer());
        model.addRow(new Object[] {null, null, null, null, null, null, null});
        for (int i = 0; i < 6; i++) {
            if (i == 0 && firstDayOfWeek > 1) {
                model.addRow(Arrays.copyOfRange(data[i], 7 - firstDayOfWeek + 1, 7));
            } else {
                model.addRow(data[i]);
            }
        }

        // 显示每天的记账信息
        try {
            for (int i = 1; i <= daysInMonth; i++) {
                stmt.setInt(1, year);
                stmt.setInt(2, month + 1);
                rs = stmt.executeQuery();
                while (rs.next()) {
                    if (rs.getInt("day") == i) {
                        model.setValueAt(rs.getInt("id"), i, 0);
                        model.setValueAt(rs.getString("type"), i, 1);
                        model.setValueAt(rs.getDouble("amount"), i, 2);
                        model.setValueAt(rs.getString("keywords"), i, 3);
                    }
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    // 处理按钮点击事件
    public void actionPerformed(ActionEvent e) {
        if (e.getSource() == prevButton) {
            int month = monthBox.getSelectedIndex() - 1;
            int year = (int) yearBox.getSelectedItem();
            if (month < 0) {
                month = 11;
                year--;
            }
            showCalendar(month, year);
        } else if (e.getSource() == nextButton) {
            int month = monthBox.getSelectedIndex() + 1;
            int year = (int) yearBox.getSelectedItem();
            if (month > 11) {
                month = 0;
                year++;
            }
            showCalendar(month, year);
        } else if (e.getSource() == addButton) {
            // TODO: 添加记账信息
        } else if (e.getSource() == searchButton) {
            // TODO: 查询记账信息
        } else if (e.getSource() == summaryButton) {
            // TODO: 显示当月记账类型的汇总
        }
    }

    public static void main(String[] args) {
        CalendarApp app = new CalendarApp();
        app.setVisible(true);
    }
}

class CalendarCellRenderer extends DefaultTableCellRenderer {
    public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
        JLabel label = (JLabel) super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column);
        if (value != null && value instanceof Integer) {
            int day = (Integer) value;
            if (day == Calendar.getInstance().get(Calendar.DATE)) {
                label.setForeground(Color.RED);
            } else {
                label.setForeground(Color.BLACK);
            }
        } else {
            label.setForeground(Color.BLACK);
        }
        return label;
    }
}

这段代码实现了一个简单的日历应用程序，包括显示指定月份的日历、添加记账信息、查询记账信息、显示当月记账类型的汇总等功能。需要注意的是，代码中的TODO注释表示需要根据具体情况进行实现。