mycalender.java

java编写与Windows相似的日历框

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

public class MyCalender extends JPanel 
        implements ChangeListener , ItemListener{
    DatePane dp = new DatePane();
    JPanel settingPanel = new JPanel();
    private static String monthNames[] = {
        "一月","二月","三月","四月","五月","六月","七月","八月","九月","十月","十一月","十二月"
    };
    JComboBox monthBox = new JComboBox(monthNames);
    SpinnerNumberModel model = new SpinnerNumberModel(2008, 0, 9999, 1); 
    JSpinner yearSpn = new JSpinner(model);
    
    public MyCalender(){
        JSpinner.NumberEditor yearEditor = new JSpinner.NumberEditor(yearSpn,"####                ");
        yearEditor.getTextField().setEditable(false);
        yearSpn.setEditor(yearEditor);
        model.addChangeListener(this);
        
        this.setBorder(new TitledBorder("日期"));
        
        monthBox.addItemListener(this);
        setLayout(new BorderLayout());
        settingPanel.setLayout(new GridLayout(1,2,20,1));
        monthBox.setSelectedIndex(dp.curDate.getMonth() - 1);
        settingPanel.add(monthBox);
        settingPanel.add(yearSpn);
        add(settingPanel, BorderLayout.NORTH);
        add(dp);
    }
    
    public static void main(String[] args){
        JFrame JF=new JFrame("日历(苏静宇 制作)");
        MyCalender t=new MyCalender();
        JF.add(t);
        JF.setSize(210,230);
        JF.setLocation(250,100);
        JF.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        JF.setResizable(false);
        JF.setVisible(true);
    }
    
    //监听年份的变化
    public void stateChanged(ChangeEvent e) {
        SpinnerModel source = (SpinnerModel)e.getSource();
        dp.curDate.setYear((Integer)source.getValue());
        dp.updateDay();
    }
    
    //监听月份的变化
    public void itemStateChanged(ItemEvent event){
        JComboBox sourceBox = (JComboBox)event.getSource();
        dp.curDate.setMonth(sourceBox.getSelectedIndex() + 1);
        dp.updateDay();
    }
}

class DatePane extends JPanel 
{
    private JPanel JP1=new JPanel();
    private JPanel JP2=new JPanel();
    private JPanel JP3=new JPanel();
    private JLabel center;
    public MyDate curDate = new MyDate();  
    private static String[] weekDayNames = {"日","一","二","三","四","五","六"};
    MyLabelListener listener = new MyLabelListener();
    DatePane()
    {
       
        this.setLayout(null);
        JP1.setLayout(new GridLayout(1,7));

        for(int i = 0 ; i < weekDayNames.length; i++){
            JLabel label = new JLabel(weekDayNames[i]);
            JP1.add(label);
        }
        this.add(JP1);
        JP1.setBounds(5,0,200,25);
        
        updateDay();
    }
    
    //添加显示本月的月历
    void put()
    {
        MyDate tmpDate = new MyDate(curDate.getYear() , curDate.getMonth() , 1);
        int week = tmpDate.getWeekDay();
        int dayNum = curDate.getDayNumOfMonth();
        for(int i=1;i<week;i++)
        {
            JP2.add(new JLabel(""));
        }
        for(int i=1;i<=dayNum;i++)
        {   
            JLabel j;
            j=new JLabel(String.valueOf(i),JLabel.CENTER);
            j.addMouseListener(listener);
            if(i==curDate.getDay())
            {
                j.setForeground(Color.red);
            }
            JP2.add(j);
        }                
        for(int i=dayNum+week;i<42;i++)
        {
            JP2.add(new JLabel(""));
        }
    }
    
    //更新当前日期的显示
    void updateDay()
    {
        JP2.removeAll();
        JP2.setLayout(new GridLayout(6,7));
        JP2.setBackground(Color.white);
        this.add(JP2);
        JP2.setBounds(0,25,195,100);                    
        
        put();
        
        JP3.removeAll();
        JP3.setLayout(new BorderLayout());
        center=new JLabel("今天：" + curDate ,JLabel.CENTER);
        JP3.add(center,BorderLayout.CENTER);
        this.add(JP3);
        JP3.setBounds(2,124,185,35);
        validate();
    }
    
    //标签的鼠标事件监听器   
    class MyLabelListener extends MouseAdapter{
        public void mousePressed(MouseEvent e)
        {
            JLabel label = (JLabel) e.getSource();
            label.setForeground(Color.white);
            int day = Integer.parseInt(label.getText());
            curDate.setDay(day);
            updateDay();
        }
        public void mouseEntered(MouseEvent e) 
        {
            JLabel label = (JLabel) e.getSource();
            label.setForeground(Color.red);
        }
        public void mouseExited(MouseEvent e) 
        {
            JLabel label = (JLabel) e.getSource();
            label.setForeground(Color.black);
            updateDay();
        }
        public void mouseReleased(MouseEvent e)
        {
            JLabel label = (JLabel) e.getSource();
            label.setForeground(Color.blue);
            updateDay();
        }
    }
    
}


class MyDate {
        public final static int MAX_YEAR = 9999;
        private int year;  //年 0 - MAX_YEAR
        private int month; //月 0-11
        private int day;   //日
        Calendar C;
        
        //初始化为系统时间
        public MyDate(){
        	C=Calendar.getInstance();
            day=C.get(Calendar.DAY_OF_MONTH);
            month=C.get(Calendar.MONTH);
            year=C.get(Calendar.YEAR);
        }
        
        //初始化为year,month,day
        public MyDate(int year,int month , int day){
        	this.year=year;
        	this.month=month - 1;
        	this.day=day;
        	
         }
        //得到今天是本周第几天
        public int getWeekDay(){
        	GregorianCalendar G1=new GregorianCalendar(year,month,day);   
            int week=G1.get(Calendar.DAY_OF_WEEK);
            return week;
        }
        //判断是否是闰年
        public boolean isLeapYear(){
        	if((year%4==0&&year%100!=0)||(year%400==0))
            	return true;
        	else 
        		return false;
        }
        //返回本月天数
        public int getDayNumOfMonth(){
        	int lm[]= {31,29,31,30,31,30,31,31,30,31,30,31};
        	int m[]={31,28,31,30,31,30,31,31,30,31,30,31};
        	if(month > 11|| month < 0) return -1;
        	int dayNum;
            if (isLeapYear())
            	dayNum=lm[month];
            else 
            	dayNum=m[month];
            return  dayNum;
        }
        //得到日期
        public int getDay(){
        	return day;
        }
        //设置日期
        public void setDay(int day){
        	if (day<=getDayNumOfMonth()&&day>0)
        		this.day=day;
        	
        }
        
        //得到月份
        public int getMonth(){
            return month +1;
        }
        //设置月份
        public void setMonth(int month){
        	if (month> 0&&month<=12) {
        		this.month=month - 1;
        		day = Math.min(day, getDayNumOfMonth());
        	}
        }
        //得到年份
        public int getYear(){
        	return year;
        }
        //设置年份
        public void setYear(int year){
        	if (year<0||year>MAX_YEAR)
        	    return ;
        	else
        		this.year=year;
        }
        //下一个月
        public void nextMonth(){
        	if (month<11)
        	month++;
        	else
        		{
        		   nextYear();
        		   
                   month=0; 
                }	
        	day = Math.min(day, getDayNumOfMonth());
            
        }
        //下一年
        public void nextYear(){
        	if (year>MAX_YEAR-1)
        		return ;
        	else
        	    year++;
        	day = Math.min(day, getDayNumOfMonth());
        }
        //上一年
        public void preYear(){
        	if (year>1)
        		year--;
        	else 
        		return;
        }
        
        
        //重载 Object类的toString方法,将对象转换为字符串
        public String toString(){
                return "" + year + "年" + (month+1) + "月" + day + "日";
        }
}