日历的实现（java语言，包括钟表盘的实现、日历内部的日程提醒）

整理文件发现了大一的时候的作业，先感慨一波时间过得真的快！

手中的这个是一个独立的java文件，可以直接就可以运行，应该是没有什么问题的。不想这个代码就此落灰了，希望可以给友友们带来一点点帮助！

运行前命名为“CalendarDemo.java”并保存就可以运行。

运行界面结果如下：

日程提醒点击某一天就会弹出，填写即可：

?代码如下：

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.geom.AffineTransform;
import java.text.SimpleDateFormat;
import java.util.*;
import java.util.Timer;
import java.lang.Integer;
import java.text.*;
import java.io.*;

public class CalendarDemo extends JFrame {
    public static void main(String[] args) {
        CalendarDemo cd = new CalendarDemo();
        cd.show();
    }
    public CalendarDemo() {
        setTitle("xxx的java作业");
        Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
        int width = screenSize.width/2;
        int height = screenSize.height/2;
        setSize(width, height);
        setResizable(true);//窗体可变  
        setVisible(true);
        setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
        JSplitPane splitPane = new JSplitPane();//分割
        splitPane.setDividerLocation(500);
        splitPane.setDividerSize(10);
        CalendarPanel calenderPanel = new CalendarPanel(this);
        ColockPanel colockPanel = new ColockPanel();
        splitPane.setLeftComponent(calenderPanel);
        splitPane.setRightComponent(colockPanel);
        Container container = getContentPane();
        container.add(splitPane);
        new Thread(colockPanel).start();
    }
}
//时钟面板
class ColockPanel extends JPanel implements Runnable,ActionListener{
    private Label cur_clock, cur_week;
    private JButton cur_day;
    @Override
    protected void paintComponent(Graphics g) {
        Graphics2D g2d = (Graphics2D) g;
        g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);//去锯齿
        g2d.setColor(Color.GRAY);
        g2d.fillRect(0, 0, this.getWidth(), this.getHeight());
        g2d.setColor(Color.GREEN);
        int xCenter = this.getWidth() / 2;
        int yCenter = this.getHeight() / 2; 
        int radius = (int) Math.min(this.getWidth(), this.getHeight() * 0.4); //计算半径
        for (int i = 1; i <= 12; i++) {
            double dd = (Math.PI * i) / 6;
            int x = (int) (Math.sin(dd) * (radius - 20) + xCenter);
            int y = (int) (yCenter - Math.cos(dd) * (radius - 20));
            g2d.drawString(Integer.toString(i), x - 5, y + 7);
        }
        AffineTransform at = g2d.getTransform();
        for (int i = 0; i < 60; i++) {
            int w = i % 5 == 0 ? 3 : 1;
            int h = i % 5 == 0 ? 8 : 5;
            g2d.fillRect(xCenter - 2, yCenter - radius, w, h);//绘制矩形
            g2d.rotate(Math.toRadians(6), xCenter, yCenter);
        }
        //获取时间
        Calendar calendar = Calendar.getInstance();
        int second = calendar.get(Calendar.SECOND);
        int minute = calendar.get(Calendar.MINUTE);
        int hour = calendar.get(Calendar.HOUR_OF_DAY);
        Date currentTime = new Date();
        SimpleDateFormat formatter_day = new SimpleDateFormat("yyyy-MM-dd");
        SimpleDateFormat formatter_clock = new SimpleDateFormat("HH:mm:ss");
        SimpleDateFormat format_week = new SimpleDateFormat("EEEE");

        setFont(new Font("宋体", Font.PLAIN, 18));
        g2d.drawString(format_week.format(currentTime), xCenter - 25, yCenter + (radius / 2));
        g2d.drawString(formatter_clock.format(currentTime), xCenter - 35, yCenter + (radius / 3));
        g2d.drawString(formatter_day.format(currentTime), xCenter - 40, yCenter - (radius / 2));
        int xh = (int) (Math.sin(Math.PI / 360 * (60 * hour + minute)) * (radius / 2) + xCenter);
        int yh = (int) (yCenter - (Math.cos(Math.PI / 360 * (60 * hour + minute)) * (radius / 2)));
        int xm = (int) (Math.sin(Math.PI * minute / 30) * ((2 * radius) / 3) + xCenter);
        int ym = (int) (yCenter - (Math.cos(Math.PI * minute / 30) * ((2 * radius) / 3)));
        int xs = (int) (Math.sin(Math.PI * second / 30) * ((4 * radius) / 5) + xCenter);
        int ys = (int) (yCenter - (Math.cos(Math.PI * second / 30) * ((4 * radius) / 5)));
        //画时针,分针,秒针
        g2d.setColor(Color.black);
        g2d.setStroke(new BasicStroke(3.0f));
        g2d.drawLine(xCenter, yCenter, xh, yh);
        g2d.setStroke(new BasicStroke(2.0f));
        g2d.drawLine(xCenter, yCenter, xm, ym);
        g2d.setStroke(new BasicStroke(1.0f));
        g2d.drawLine(xCenter, yCenter, xs, ys);
        g2d.fillOval(xCenter - 5, yCenter - 5, 10, 10);
    }
   @Override
    public void run() {
        while (true) {
            try {
                Thread.sleep(100);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            repaint(0,70,300,500);
        }
    }
    @Override
    public void actionPerformed(ActionEvent e) {
    }
}
//日历面板
class CalendarPanel extends JPanel implements ActionListener {
    private JPanel selectPanel;//月份减少按钮 ,选择月份 年份按钮,月份增加按钮
    private JPanel showPanel;//该面板有三种显示状态,一种显示日历,一种显示选择月份,一种显示选择年份
    private JPanel weekdayPanel;//该面板被添加到showPanel,用于静态显示周一到周日
    private JPanel calshowPanel;//用于显示一月中的每一天
    private JPanel selectMonth;
    private JPanel selectYear;
    private JButton btleft;
    private JButton btmid;
    private JButton btright;
    private JFrame mainframe;
    private JButton bt;
    private TextField myText;
    private Button[] btday = new Button[42];
    private Button[] btmouth = new Button[12];
    private Button[] btyear = new Button[12];
    private Calendar curcalendar;//记录当前日历上显示的日期
    private JFrame jFrame;

    public CalendarPanel(JFrame jFrame) {
        this.jFrame = jFrame;
        setLayout(null);//设置布局为null
        setBackground(new Color(143, 241, 219));

        selectPanel = new JPanel();
        selectPanel.setBackground(new Color(193, 241, 151));
        selectPanel.setBounds(0, 0, 500, 50);
        selectPanel.setLayout(null);
        add(selectPanel);

        btleft = new JButton("<");
        btleft.setBounds(50, 10, 50, 30);
        btleft.addActionListener(this);
        selectPanel.add(btleft);

        btmid = new JButton("");
        btmid.setBounds(175, 10, 150, 30);
        btmid.addActionListener(this);
        selectPanel.add(btmid);

        btright = new JButton(">");
        btright.setBounds(400, 10, 50, 30);
        btright.addActionListener(this);
        selectPanel.add(btright);

        weekdayPanel = new JPanel();
        weekdayPanel.setBounds(0, 0, 490, 20);
        weekdayPanel.setBackground(new Color(83, 199, 241));
        weekdayPanel.setLayout(new GridLayout(1, 7));
        weekdayPanel.setBorder(BorderFactory.createLineBorder(Color.black));
        weekdayPanel.add(new JLabel("日", JLabel.CENTER));
        weekdayPanel.add(new JLabel("一", JLabel.CENTER));
        weekdayPanel.add(new JLabel("二", JLabel.CENTER));
        weekdayPanel.add(new JLabel("三", JLabel.CENTER));
        weekdayPanel.add(new JLabel("四", JLabel.CENTER));
        weekdayPanel.add(new JLabel("五", JLabel.CENTER));
        weekdayPanel.add(new JLabel("六", JLabel.CENTER));

        calshowPanel = new JPanel();
        calshowPanel.setBounds(0, 130, 500,430);
        calshowPanel.setLayout(new GridLayout(6, 7));

        for (int i = 0; i < 42; i++) {
            btday[i] = new Button();
            btday[i].setBackground(new Color(202,211,221));
            btday[i].setFont(new Font("宋体", 4, 14));
            btday[i].addActionListener(this);
        }

        curcalendar = Calendar.getInstance();
        int monthday = curcalendar.get(Calendar.DAY_OF_MONTH);
        int weekday = curcalendar.get(Calendar.DAY_OF_WEEK);
        int startcol = 7 - (monthday - weekday) % 7;//当月第一天是一个星期中的第几天
        if (startcol > 7) {
            startcol = startcol%7;
        }
        System.out.println(startcol);

        String midbt_lab = curcalendar.get(Calendar.YEAR) + "年" + (curcalendar.get(Calendar.MONTH) + 1) + "月";
        btmid.setText(midbt_lab);

        Calendar lastcalendar = (Calendar) curcalendar.clone();
        lastcalendar.set(Calendar.DAY_OF_MONTH, 1);
        lastcalendar.add(Calendar.DAY_OF_MONTH, -startcol);
        int tablestart = lastcalendar.get(Calendar.DAY_OF_MONTH);//该页日历起始时是当月的第几天

      int k = 0;
        for (int i = 0; i < startcol; i++) {
            btday[k].setForeground(Color.GRAY);
            btday[k].setLabel((tablestart++) + "");
            calshowPanel.add(btday[k++]);
        }
        for (int i = 1; i <= curcalendar.getActualMaximum(Calendar.DAY_OF_MONTH); i++) {
            btday[k].setForeground(Color.black);
            btday[k].setLabel(i + "");
            if (curcalendar.get(Calendar.DAY_OF_MONTH) == i-4) {
                btday[i].setBackground(new Color(255, 255, 255));
            }
            calshowPanel.add(btday[k++]);

        }
        for (int i = 1; i <= 42 - startcol - curcalendar.getActualMaximum(Calendar.DAY_OF_MONTH); i++) {
            btday[k].setForeground(Color.GRAY);
            btday[k].setLabel(i + "");
            calshowPanel.add(btday[k++]);
        }
        showPanel = new JPanel();
        showPanel.setBounds(0, 50, 500, 450);
        showPanel.setLayout(new BorderLayout());
        showPanel.setBorder(BorderFactory.createLineBorder(Color.black));
        showPanel.add(weekdayPanel, BorderLayout.NORTH);
        showPanel.add(calshowPanel, BorderLayout.CENTER);
        add(showPanel);
      
        selectMonth = new JPanel(new GridLayout(3, 4));  //选择月份
        selectMonth.setBounds(0, 70, 500, 370);
        for (int i = 0; i < 12; i++) {
            btmouth[i] = new Button((i + 1) + "月");
            btmouth[i].addActionListener(this);
            btmouth[i].setBackground(new Color(202,211,221));
            btmouth[i].setFont(new Font("Dialog",5,18));
            selectMonth.add(btmouth[i]);
        }
        
        selectYear = new JPanel(new GridLayout(3, 4));//选择年份
        selectYear.setBounds(0, 45, 500, 400);
        for (int i = 0; i < 12; i++) {
            btyear[i] = new Button((curcalendar.get(Calendar.YEAR) - 6 + i) + "");
            btyear[i].addActionListener(this);
            btyear[i].setBackground(new Color(202,211,221));
            btyear[i].setFont(new Font("Dialog",5,18));
            selectYear.add(btyear[i]);
        }
    }
    //更新日历方法
    private void updatebtday() {
        int monthday = curcalendar.get(Calendar.DAY_OF_MONTH);//当前日期(在一月中的第几天)
        int weekday = curcalendar.get(Calendar.DAY_OF_WEEK);//(在一周中的第几天)
        int startcol = 7 - (monthday - weekday) % 7;//第一天是星期几
        if (startcol > 7) {
            startcol = startcol%7;
        }
        Calendar lastcalendar = (Calendar) curcalendar.clone();
        lastcalendar.set(Calendar.DAY_OF_MONTH, 1);
        lastcalendar.add(Calendar.DAY_OF_MONTH, -startcol);
        int tablestart = lastcalendar.get(Calendar.DAY_OF_MONTH);

        String midbt_lab = curcalendar.get(Calendar.YEAR) + "年" + (curcalendar.get(Calendar.MONTH) + 1) + "月";
        btmid.setText(midbt_lab);

        int k = 0;
        for (int i = 0; i < startcol; i++) {
            btday[k].setForeground(Color.GRAY);
            btday[k++].setLabel((tablestart++) + "");
        }
        for (int i = 1; i <= curcalendar.getActualMaximum(Calendar.DAY_OF_MONTH); i++) {
            btday[k].setForeground(Color.black);
            btday[k++].setLabel(i + "");
        }
        for (int i = 1; i <= 42 - startcol - curcalendar.getActualMaximum(Calendar.DAY_OF_MONTH); i++) {
            btday[k].setForeground(Color.GRAY);
            btday[k++].setLabel(i + "");
        }
        }
     
   private int parseTime(String str) throws ParseException{
     int i = 0, months=0,days=0;
     int ch;
     ch = str.charAt(i);
     while (i < str.length() && ch != '-') {
     if (ch < '0' || ch > '9')   throw new ParseException(str, i);
     months= months*10+ch - '0';
     i++;
     if (i < str.length())
     ch = str.charAt(i);
     else
     throw new ParseException(str, i);
     }
     i++;
     ch = str.charAt(i);
     while (i < str.length() ) {
     if (ch < '0' || ch > '9')  throw new ParseException(str, i);
     days=days*10+ch - '0';
     i++;
     if (i < str.length())
     ch = str.charAt(i);
     }
     if (months > 12 || days>31) throw new ParseException(str, i);
     return months*30+days;
     }

    public String TimeToString(Date day) {
    Formatter fmt = new Formatter();
    fmt.format("%tF"+"   "+"%tT",day,day);
    return fmt.toString();
     }
    JLabel component1=new JLabel("");
    JTextField component3=new JTextField("");
    int times;
    class refresh extends TimerTask{
    	int i=0;
        public refresh(){
        	super();
        }
        public void run(){
          Date day=new Date();
        	TimeToString(day);
        	component1.setText(TimeToString(day));
        	i++;
        	if(i==3600*24){
        		times--;
        		i-=3600*24;
        	}
        }
    }
    public void show(){
    	JFrame jf=new JFrame("日程");
        jf.setSize(450,300);
        jf.setLocationRelativeTo(null);
        jf.setDefaultCloseOperation(3);
        jf.setResizable(false);
         Date today = new Date(); 
        JTextField component14=new JTextField();
        JLabel component15=new JLabel("地点");
        JLabel component4=new JLabel("指定日期");
        JTextField component5=new JTextField("00:00-24:00");
      JLabel component6=new JLabel("提醒时间");
        JTextField component7=new JTextField();
        JLabel   component8=new JLabel("事件");
        JButton component9=new JButton("清空内容");
        JButton component10=new JButton("确定");
        JButton component11=new JButton("取消");
        JCheckBox component12=new JCheckBox("弹窗提醒");    
        JLabel component2=new JLabel("倒计时"+"    "+"天");
        GridBagLayout gridBagLayout=new GridBagLayout(); //实例化布局对象
        jf.setLayout(gridBagLayout);                     //jf窗体对象设置为GridBagLayout布局
        GridBagConstraints gridBagConstraints=new GridBagConstraints();//实例化这个对象用来对组件进行管理
        gridBagConstraints.fill=GridBagConstraints.BOTH;//BOTH实现填充
        component9.addMouseListener(new java.awt.event.MouseAdapter() {
       public void mouseClicked(java.awt.event.MouseEvent e) {
       component7.setText("");
        }
       });
        component11.addMouseListener(new java.awt.event.MouseAdapter() {
       public void mouseClicked(java.awt.event.MouseEvent e) {
       jf.setVisible(false);
        }
       });
        component10.addMouseListener(new java.awt.event.MouseAdapter() {
       public void mouseClicked(java.awt.event.MouseEvent e) {
       	 int endtime;
       	 int curtime=(today.getMonth()+1)*30+today.getDate();
        try{endtime=parseTime(component3.getText())-curtime; 
        	times=endtime;
        	component2.setText("倒计时"+" "+endtime+" "+"天");
        	if(endtime==0&&component12.isSelected()) jf.setState(JFrame.NORMAL);
           else jf.setState(JFrame.ICONIFIED);
        }catch(ParseException el){
        	JOptionPane.showMessageDialog(jf, "指定日期有错误");
        }
        }
       });
       gridBagConstraints.gridx=1;
        gridBagConstraints.gridy=3;
        gridBagConstraints.gridwidth=2;                                             
        gridBagConstraints.gridheight=1;            
        gridBagLayout.setConstraints(component14, gridBagConstraints);

        gridBagConstraints.gridx=3;
        gridBagConstraints.gridy=3;
        gridBagConstraints.gridwidth=1;                                             
        gridBagConstraints.gridheight=1;            
        gridBagLayout.setConstraints(component15, gridBagConstraints);

        gridBagConstraints.gridx=1;
        gridBagConstraints.gridy=2;
        gridBagConstraints.gridwidth=4;                                             
        gridBagConstraints.gridheight=1;            
        gridBagLayout.setConstraints(component1, gridBagConstraints);

        gridBagConstraints.gridx=1;
        gridBagConstraints.gridy=4;
        gridBagConstraints.gridwidth=2;                                             
        gridBagConstraints.gridheight=1;            
        gridBagLayout.setConstraints(component3, gridBagConstraints);

        gridBagConstraints.gridx=3;
        gridBagConstraints.gridy=4;
        gridBagConstraints.gridwidth=1;                                             
        gridBagConstraints.gridheight=1;            
        gridBagLayout.setConstraints(component4, gridBagConstraints);

        gridBagConstraints.gridx=1;
        gridBagConstraints.gridy=5;
        gridBagConstraints.gridwidth=2;                                             
        gridBagConstraints.gridheight=1;            
        gridBagLayout.setConstraints(component5, gridBagConstraints);

        gridBagConstraints.gridx=3;
        gridBagConstraints.gridy=5;
        gridBagConstraints.gridwidth=2;                                             
        gridBagConstraints.gridheight=1;            
        gridBagLayout.setConstraints(component6, gridBagConstraints);

        gridBagConstraints.gridx=1;
        gridBagConstraints.gridy=6;
        gridBagConstraints.gridwidth=4;                                             
        gridBagConstraints.gridheight=4;            
        gridBagLayout.setConstraints(component7, gridBagConstraints);

        gridBagConstraints.gridx=5;
        gridBagConstraints.gridy=6;
        gridBagConstraints.gridwidth=1;                                             
        gridBagConstraints.gridheight=1;            
        gridBagLayout.setConstraints(component8, gridBagConstraints);

        gridBagConstraints.gridx=1;
        gridBagConstraints.gridy=10;
        gridBagConstraints.gridwidth=2;                                             
        gridBagConstraints.gridheight=1;            
        gridBagLayout.setConstraints(component9, gridBagConstraints);

        gridBagConstraints.gridx=4;
        gridBagConstraints.gridy=10;
        gridBagConstraints.gridwidth=1;                                             
        gridBagConstraints.gridheight=1;            
        gridBagLayout.setConstraints(component2, gridBagConstraints);

        gridBagConstraints.gridx=1;
        gridBagConstraints.gridy=11;
        gridBagConstraints.gridwidth=1;                                             
        gridBagConstraints.gridheight=1;            
        gridBagLayout.setConstraints(component10, gridBagConstraints);

        gridBagConstraints.gridx=2;
        gridBagConstraints.gridy=11;
        gridBagConstraints.gridwidth=1;                                             
        gridBagConstraints.gridheight=1;            
        gridBagLayout.setConstraints(component11, gridBagConstraints);
        
        gridBagConstraints.gridx=4;
        gridBagConstraints.gridy=11;
        gridBagConstraints.gridwidth=1;                                             
        gridBagConstraints.gridheight=1;            
        gridBagLayout.setConstraints(component12, gridBagConstraints);       
        jf.add(component1);
        jf.add(component14);
        jf.add(component15); 
        jf.add(component2);
        jf.add(component3);
        jf.add(component4);
        jf.add(component5);
        jf.add(component6);
        jf.add(component7);
        jf.add(component8);
        jf.add(component9);
        jf.add(component10);
        jf.add(component11);
        jf.add(component12);
        jf.setVisible(true);
    }
    @Override
    public void actionPerformed(ActionEvent e) {
        if (e.getSource() == btmid) {//中间按钮
            JPanel getPanel = (JPanel) showPanel.getComponent(0);
            if (getPanel == weekdayPanel) {
                btmid.setText(curcalendar.get(Calendar.YEAR) + "");
                showPanel.removeAll();
                showPanel.add(selectMonth);
            } else if (getPanel == selectMonth){
                showPanel.removeAll();
                showPanel.add(selectYear);
                btmid.setText((curcalendar.get(Calendar.YEAR) - 6) + "-" + (curcalendar.get(Calendar.YEAR) + 5));
            }
            jFrame.setVisible(true);
            } else if (e.getSource() == btleft) {//左边按钮
            JPanel getPanel = (JPanel) showPanel.getComponent(0);//获取容器中的第1个组件
            if (getPanel == weekdayPanel) {
                int month1 = curcalendar.get(Calendar.MONTH);
                curcalendar.set(Calendar.MONTH, month1 - 1);
                updatebtday();
            } else if (getPanel == selectMonth) {
                int year = curcalendar.get(Calendar.YEAR);
                curcalendar.set(Calendar.YEAR, year - 1);
                btmid.setText(curcalendar.get(Calendar.YEAR) + "");
            } else {
                String str = btyear[0].getLabel();
                int first = Integer.parseInt(str);
                for (int i = 11; i >= 0; i--) {
                    btyear[i].setLabel((--first) + "");
                }
                btmid.setText(first + "-" + (first + 11));
            }
        } else if (e.getSource() == btright) {
            JPanel getPanel = (JPanel) showPanel.getComponent(0);
            if (getPanel == weekdayPanel) {//如得到的组件是星期Panel,那么更新日历
                int month1 = curcalendar.get(Calendar.MONTH);
                curcalendar.set(Calendar.MONTH, month1 + 1);
                updatebtday();
            } else if (getPanel == selectMonth) {//如果得到的组件是月份的Panel,那么更新年份
                int year = curcalendar.get(Calendar.YEAR);
                curcalendar.set(Calendar.YEAR, year + 1);
                btmid.setText(curcalendar.get(Calendar.YEAR) + "");
            } else {	//如果是选择年份界面,那么改变年份和mid按钮
                String str = btyear[11].getLabel();
                int last = Integer.parseInt(str);
                for (int i = 0; i < 12; i++) {
                    btyear[i].setLabel((++last) + "");
                }
                btmid.setText((last - 11) + "-" + last);
            }
        } else if (((Button) e.getSource()).getForeground() == Color.GRAY) {//如果发生事件的为灰色按钮
            String command = e.getActionCommand();
            int com_int = Integer.parseInt(command);
            if (com_int > 20) {//大于20表明是上个月的,设置月份,调用更新月份的方法
                int month3 = curcalendar.get(Calendar.MONTH); 
                curcalendar.set(Calendar.MONTH, month3 - 1);
            } else if (com_int < 20) {//小于20为下个月的
                int month3 = curcalendar.get(Calendar.MONTH);
                curcalendar.set(Calendar.MONTH, month3 + 1);
            }
            updatebtday();

        } else if (((Button) e.getSource()).getForeground() == Color.black) {
        	show();
        	String str = e.getActionCommand();
        	component3.setText("01"+'-'+str);
        	Date d = new Date();
            Timer tmr = new Timer();
            tmr.schedule(new refresh(),1000,1000); 
           ((Button) e.getSource()).setBackground(Color.RED);

        } else if (e.getSource() == btyear[0]) {
            String str = e.getActionCommand();
            int year = Integer.parseInt(str);
            curcalendar.set(Calendar.YEAR, year);
            showPanel.removeAll();
            showPanel.add(selectMonth);
            btmid.setText(str);

        } else if (e.getSource() == btyear[1]) {
            String str = e.getActionCommand();
            int year = Integer.parseInt(str);
            curcalendar.set(Calendar.YEAR, year);
            showPanel.removeAll();
            showPanel.add(selectMonth);
            btmid.setText(str);
        } else if (e.getSource() == btyear[2]) {
            String str = e.getActionCommand();
            int year = Integer.parseInt(str);
            curcalendar.set(Calendar.YEAR, year);
            showPanel.removeAll();
            showPanel.add(selectMonth);
            btmid.setText(str);

        } else if (e.getSource() == btyear[3]) {
            String str = e.getActionCommand();
            int year = Integer.parseInt(str);
            curcalendar.set(Calendar.YEAR, year);
            showPanel.removeAll();
            showPanel.add(selectMonth);
            btmid.setText(str);

        } else if (e.getSource() == btyear[4]) {
            String str = e.getActionCommand();
            int year = Integer.parseInt(str);
            curcalendar.set(Calendar.YEAR, year);
            showPanel.removeAll();
            showPanel.add(selectMonth);
            btmid.setText(str);

        } else if (e.getSource() == btyear[5]) {
            String str = e.getActionCommand();
            int year = Integer.parseInt(str);
            curcalendar.set(Calendar.YEAR, year);
            showPanel.removeAll();
            showPanel.add(selectMonth);
            btmid.setText(str);

        } else if (e.getSource() == btyear[6]) {
            String str = e.getActionCommand();
            int year = Integer.parseInt(str);
            curcalendar.set(Calendar.YEAR, year);
            showPanel.removeAll();
            showPanel.add(selectMonth);
            btmid.setText(str);

        } else if (e.getSource() == btyear[7]) {
            String str = e.getActionCommand();
            int year = Integer.parseInt(str);
            curcalendar.set(Calendar.YEAR, year);
            showPanel.removeAll();
            showPanel.add(selectMonth);
            btmid.setText(str);

        } else if (e.getSource() == btyear[8]) {
            String str = e.getActionCommand();
            int year = Integer.parseInt(str);
            curcalendar.set(Calendar.YEAR, year);
            showPanel.removeAll();
            showPanel.add(selectMonth);
            btmid.setText(str);

        } else if (e.getSource() == btyear[9]) {
            String str = e.getActionCommand();
            int year = Integer.parseInt(str);
            curcalendar.set(Calendar.YEAR, year);
            showPanel.removeAll();
            showPanel.add(selectMonth);
            btmid.setText(str);

        } else if (e.getSource() == btyear[10]) {
            String str = e.getActionCommand();
            int year = Integer.parseInt(str);
            curcalendar.set(Calendar.YEAR, year);
            showPanel.removeAll();
            showPanel.add(selectMonth);
            btmid.setText(str);

        } else if (e.getSource() == btyear[11]) {
            String str = e.getActionCommand();
            int year = Integer.parseInt(str);
            curcalendar.set(Calendar.YEAR, year);
            showPanel.removeAll();
            showPanel.add(selectMonth);
            btmid.setText(str);

        } else {
            switch (e.getActionCommand()) {
                case "1月":
                    curcalendar.set(Calendar.MONTH, 0);
                    break;
                case "2月":
                    curcalendar.set(Calendar.MONTH, 1);
                    break;
                case "3月":
                    curcalendar.set(Calendar.MONTH, 2);
                    break;
                case "4月":
                    curcalendar.set(Calendar.MONTH, 3);
                    break;
                case "5月":
                    curcalendar.set(Calendar.MONTH, 4);
                    break;
                case "6月":
                    curcalendar.set(Calendar.MONTH, 5);
                    break;
                case "7月":
                    curcalendar.set(Calendar.MONTH, 6);
                    break;
                case "8月":
                    curcalendar.set(Calendar.MONTH, 7);
                    break;
                case "9月":
                    curcalendar.set(Calendar.MONTH, 8);
                    break;
                case "10月":
                    curcalendar.set(Calendar.MONTH, 9);
                    break;
                case "11月":
                    curcalendar.set(Calendar.MONTH, 10);
                    break;
                case "12月":
                    curcalendar.set(Calendar.MONTH, 11);
                    break;

            }
            showPanel.removeAll();
            updatebtday();
            showPanel.add(weekdayPanel,BorderLayout.NORTH);
            showPanel.add(calshowPanel,BorderLayout.CENTER);
            jFrame.setVisible(true);

        }
    }
}

可能会存在一点bug，不过影响应该不大，希望可以起到微薄帮助！?加油！