隨便做了一個，其實一樓網(wǎng)友說的判斷哪些30天，是否閏年什么的沒必要，看代碼：
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package?com.baidu.calendar;
import?java.awt.BorderLayout;
import?java.awt.Color;
import?java.awt.FlowLayout;
import?java.awt.Font;
import?java.awt.GridLayout;
import?java.awt.event.ItemEvent;
import?java.awt.event.ItemListener;
import?java.text.DateFormat;
import?java.text.SimpleDateFormat;
import?java.util.Calendar;
import?javax.swing.JComboBox;
import?javax.swing.JFrame;
import?javax.swing.JLabel;
import?javax.swing.JPanel;
import?javax.swing.border.CompoundBorder;
import?javax.swing.border.EmptyBorder;
import?javax.swing.border.LineBorder;
public?class?CalendarInterface?extends?JFrame?{
private?static?final?long?serialVersionUID?=?1L;
private?JComboBox?yearBox,?monthBox;
private?static?final?int?YEAR_RANGE?=?50;?//?年份范圍，即往前往后各推多少年
private?JPanel?topPane,?contentPane;
private?JPanel?bottomPane,?bottomTopPane,?mainPane;
private?JLabel?dateLabel;
private?boolean?init?=?false;
private?Calendar?cal;
private?static?final?Calendar?NOW?=?Calendar.getInstance();
private?static?final?String[]?DAY_OF_WEEK?=?{"星期日彎讓",?"星期一",?"星期二",
"星期三"虛磨,?"星期四",?"星期五",?"星期六"};
private?DateFormat?df?=?new?SimpleDateFormat("yyyy年MM月");
private?static?final?Color?FONT_GRAY?=?new?Color(0xaa,?0xaa,?0xaa);
private?static?final?int?DATE_GRAY?=?-1;
private?static?final?int?DATE_RED?差鬧斗=?1;
private?static?final?int?DATE_BLACK?=?0;
public?CalendarInterface()?{
super("日歷");
cal?=?Calendar.getInstance();
cal.setFirstDayOfWeek(Calendar.SUNDAY);
}
public?void?launch()?{
setVisible(true);
setSize(600,?450);
setDefaultCloseOperation(EXIT_ON_CLOSE);
//?主面板
contentPane?=?new?JPanel(new?BorderLayout());
contentPane.setBorder(new?EmptyBorder(5,?5,?5,?5));
contentPane.setBackground(Color.WHITE);
//?頂部選擇日期和月份的區(qū)域
topPane?=?new?JPanel(new?FlowLayout(FlowLayout.CENTER,?50,?0));?//?居中對齊，控件間隔50px
topPane.setBorder(new?EmptyBorder(0,?0,?10,?0));?//?底部空出10px
topPane.setBackground(Color.WHITE);
//?底部顯示星期條和日歷列表區(qū)域
bottomPane?=?new?JPanel(new?BorderLayout());
bottomPane.setBorder(new?LineBorder(Color.BLACK,?1));
//?星期條
bottomTopPane?=?new?JPanel(new?GridLayout(1,?7));
bottomTopPane.setBackground(new?Color(0x55,?0x55,?0x55));
//?日期列表
mainPane?=?new?JPanel();
mainPane.setLayout(new?GridLayout(0,?7));?//?列數(shù)為7，行數(shù)自動填充
for(int?i?=?Calendar.SUNDAY;?i?=?Calendar.SATURDAY;?i?++)?{
bottomTopPane.add(createDay(DAY_OF_WEEK[i?-?1]));
}
bottomPane.add(bottomTopPane,?BorderLayout.NORTH);?//?星期欄放在頂部
//?年份下拉列表
yearBox?=?new?JComboBox();
int?currentYear?=?cal.get(Calendar.YEAR);
//?年份范圍為往前往后各推50年
for(int?i?=?currentYear?-?YEAR_RANGE;?i??currentYear?+?YEAR_RANGE?+?1;?i?++)?{
yearBox.addItem(i);
}
yearBox.addItemListener(new?ItemListener()?{
@Override
public?void?itemStateChanged(ItemEvent?e)?{
if(ItemEvent.SELECTED?==?e.getStateChange())?{
reset();?//?選擇后刷新布局
}
}
});
yearBox.setSelectedIndex(YEAR_RANGE);?//?默認(rèn)選中當(dāng)前年份
String?months[]?=?{"1",?"2",?"3",?"4",?"5",?"6",?"7",?"8",?"9",?"10",?"11",?"12"};
//?月份下拉列表
monthBox?=?new?JComboBox(months);
monthBox.addItemListener(new?ItemListener()?{
@Override
public?void?itemStateChanged(ItemEvent?e)?{
if(ItemEvent.SELECTED?==?e.getStateChange())?{
reset();?//刷新布局
}
}
});
monthBox.setSelectedIndex(cal.get(Calendar.MONTH));?//?選擇當(dāng)前月份
//?顯示當(dāng)前年月的控件
this.dateLabel?=?new?JLabel(df.format(cal.getTime()));
topPane.add(yearBox);
topPane.add(monthBox);
topPane.add(dateLabel);
contentPane.add(topPane,?BorderLayout.NORTH);
bottomPane.add(mainPane,?BorderLayout.CENTER);
contentPane.add(bottomPane,?BorderLayout.CENTER);
setContentPane(contentPane);
validate();
init?=?true;?//?初始化完成
reset();?//?刷新界面
setLocationRelativeTo(null);?//?居中顯示
}
public?static?void?main(String[]?args)?{
new?CalendarInterface().launch();
}
private?void?reset()?{?//?每次年份或月份改變后則日歷重新排列
if(!init)?{?//?若未初始化則返回，避免設(shè)置默認(rèn)年月時調(diào)用此方法出錯
return;
}
int?year?=?(Integer)?yearBox.getSelectedItem();
int?month?=?Integer.parseInt((String)?monthBox.getSelectedItem());
//?將日期設(shè)置為本月第一天
cal.set(Calendar.YEAR,?year);
cal.set(Calendar.MONTH,?month?-?1);
cal.set(Calendar.DATE,?1);
dateLabel.setText(df.format(cal.getTime()));?//?顯示年月
mainPane.removeAll();?//?清空日歷列表
//?判斷本月第一天是星期幾，在第一天之前增加空的日歷
int?startDayOfWeek?=?cal.get(Calendar.DAY_OF_WEEK);
int?i;
//?先設(shè)置為本周屬于上個月的幾天，置灰顯示
cal.add(Calendar.DATE,?-(startDayOfWeek?-?Calendar.SUNDAY)?-?1);
for(i?=?Calendar.SUNDAY;?i??startDayOfWeek;?i?++)?{
cal.add(Calendar.DATE,?1);
int?date?=?cal.get(Calendar.DATE);
mainPane.add(createDate(Integer.toString(date),?DATE_GRAY));
}
i?=?startDayOfWeek;
//?重新初始化為本月第一天
cal.set(Calendar.MONTH,?month?-?1);
cal.set(Calendar.DATE,?1);
int?maxDate?=?cal.getActualMaximum(Calendar.DATE);?//?本月最多的天數(shù)（不用再去判斷是否閏年了）
for(int?j?=?1;?j?=?maxDate;?j?++)?{
cal.set(Calendar.DATE,?j);?//?日期一直自增，用來判斷是否是今天
JLabel?jlDate?=?null;
if(isToday())?{?//?是今天則高亮顯示
jlDate?=?createDate(Integer.toString(j),?DATE_RED);
}?else?{?//?不是今天則顯示為普通顏色
jlDate?=?createDate(Integer.toString(j));
}
mainPane.add(jlDate);
}
//?最后一周把不屬于本月的幾天用灰色控件填充
int?lastDay?=?cal.get(Calendar.DAY_OF_WEEK);
for(i?=?lastDay;?i??Calendar.SATURDAY;?i?++)?{
cal.add(Calendar.DATE,?1);
int?date?=?cal.get(Calendar.DATE);
mainPane.add(createDate(Integer.toString(date),?DATE_GRAY));
}
mainPane.validate();
}
private?JLabel?createDate(String?date)?{
return?createDate(date,?DATE_BLACK);
}
//?創(chuàng)建日期控件
private?JLabel?createDate(String?date,?int?dateColor)?{
JLabel?label?=?new?JLabel(date,?JLabel.CENTER);
CompoundBorder?border?=?new?CompoundBorder(
new?LineBorder(Color.WHITE,?1),
new?EmptyBorder(10,?10,?10,?10));
label.setBorder(border);
Font?font?=?new?Font("Arial",?Font.BOLD,?30);
if(DATE_GRAY?==?dateColor)?{?//?如果不是本月則文字置灰
label.setForeground(FONT_GRAY);
}?else?if(DATE_RED?==?dateColor)?{?//?如果是今天則高亮顯示
label.setForeground(Color.RED);
}
label.setFont(font);
return?label;
}
//?創(chuàng)建星期幾的橫條
private?JLabel?createDay(String?day)?{
JLabel?jlDay?=?new?JLabel(day,?JLabel.CENTER);
jlDay.setBorder(new?EmptyBorder(5,?5,?5,?5));
jlDay.setBackground(Color.GRAY);
jlDay.setForeground(Color.WHITE);
return?jlDay;
}
//?判斷是否今天
private?boolean?isToday()?{
return?cal.get(Calendar.YEAR)?==?NOW.get(Calendar.YEAR)
?cal.get(Calendar.MONTH)?==?NOW.get(Calendar.MONTH)
?cal.get(Calendar.DATE)?==?NOW.get(Calendar.DATE);
}
}
我給你貼上我在java核心技術(shù)中看到的代碼吧,當(dāng)然沒有輸入年份和月份,是按照當(dāng)前時間創(chuàng)建的,寫有我寫的注釋,應(yīng)該能看的懂
/*
* 2012年5月13日10:37:58
* 日歷程序
* Function:
* 顯示當(dāng)前月份的日歷
* 總結(jié)
* 1. 0-11分別代表1-12月
* 1-7分別代表周日-周六
* 2. 使用GregorianCalendar對象的get方法（參數(shù)）獲取月，日，年等信息
* 3.
*/
import java.text.DateFormatSymbols;
import java.util.*;
public class CalendarTest {
public static void main(String[] args) {
//construct d as current date構(gòu)造一個日期
GregorianCalendar d = new GregorianCalendar();
//獲取今天是這個月的第幾天
int today = d.get(Calendar.DAY_OF_MONTH); //Calendar.DAY_OF_MONTH作為參數(shù)調(diào)用，得到今天是這個月的第幾天
int month = d.get(Calendar.MONTH); //月份
d.set(Calendar.DAY_OF_MONTH, 1); //設(shè)置d的日期是本月的1號
int weekDay = d.get(Calendar.DAY_OF_WEEK); //獲取當(dāng)天位于本星期的第幾天，也就確定了星期幾，值的范圍是1-7
int firstDayOfWeek = d.getFirstDayOfWeek(); //獲取一星期的第早坦一天,我們得到的是Calendar.SUNDAY,因為我們一星期的第一天是周日
int indent = 0; //為了定位本月第一天，定義索引
while (weekDay != firstDayOfWeek) {
//注意，月份用0-11代表1-12月，為了清晰起見，使用常量代替，下面寬遲獲取月份得到的實際是當(dāng)前月-1的值，所以我們要加1
//System.out.printf("當(dāng)前星期的第%d天,位于當(dāng)月的第%d天, 現(xiàn)在是%d月\n",
// weekDay, d.get(Calendar.DAY_OF_MONTH), d.get(Calendar.MONTH)+1); //Test Code
indent++;//陸巧桐縮進個數(shù)+1
d.add(Calendar.DAY_OF_MONTH, -1);//當(dāng)前天數(shù)-1，如果現(xiàn)在是1號，則執(zhí)行本條代碼后，時間變?yōu)樯弦粋€月最后一天
weekDay = d.get(Calendar.DAY_OF_WEEK); //重新獲取當(dāng)天位于本星期的第幾天
}
String[] weekDayNames = new DateFormatSymbols().getShortWeekdays();//獲取簡短形式的星期字符串?dāng)?shù)組
//System.out.println(weekDayNames.length);getShortWeekdays()得到的數(shù)組的長度是8，下標(biāo)為0的是沒有值1為星期日...7為星期六
//注釋代碼1
//Java核心技術(shù)的代碼
/*
do {
//System.out.printf("%4s", weekDayNames[weekDay]); //經(jīng)過上面定義索引，weekDay代表的是本星期日
d.add(Calendar.DAY_OF_MONTH, 1); //天數(shù)加1
weekDay = d.get(Calendar.DAY_OF_WEEK); //重新獲得weekDay的值
} while (weekDay != firstDayOfWeek); //當(dāng)循環(huán)完一個星期后，這里判斷不成立，退出循環(huán)
*/
//我寫的代碼，替換上面注釋代碼1
for (int i=1; iweekDayNames.length; i++)//打印星期標(biāo)題
System.out.printf("%3s\t", weekDayNames[i]);//引號內(nèi)是一個全角的空格，因為是中文版，不是書上英文環(huán)境,中文和空格對于不上,這里我們用\t解決
//System.out.printf("%3s ", weekDayNames[i]); //方式2
System.out.println();//換行
for (int i=1; i=indent; i++)//確定一星期的一天位置，利用上面indent
System.out.printf("\t");//如用方式2，則這里內(nèi)容是四個全角空格
//實現(xiàn)輸出日期
d.set(Calendar.MONTH, month);
d.set(Calendar.DAY_OF_MONTH, 1);
do {
//print day
int day = d.get(Calendar.DAY_OF_MONTH);
System.out.printf("%3d", day);
if (day == today)
System.out.print("*");
System.out.print("\t");
d.add(Calendar.DATE, 1);//天數(shù)加1
weekDay = d.get(Calendar.DAY_OF_WEEK);//刷新weekDay
if (weekDay == firstDayOfWeek) //如果這天等于星期天則換行
System.out.println();
} while (d.get(Calendar.MONTH) == month);
}
}
詳細(xì)代碼
//CalendarWindow類：
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import java.io.*;
public class CalendarWindow extends JFrame implements ActionListener,
MouseListener,FocusListener{
int year,month,day;
CalendarMessage calendarMessage;
CalendarPad calendarPad;
NotePad notePad;
JTextField showYear,showMonth;
JTextField [] showDay;
CalendarImage calendarImage;
Clock clock;
JButton nextYear,previousYear,nextMonth,previousMonth;
JButton saveDailyRecord,deleteDailyRecord,readDailyRecord;
File dir;
Color backColor=Color.gray;
public CalendarWindow(){
dir=new File("./dailyRecord");
dir.mkdir();
showDay=new JTextField[42];
for(int i=0;i嘩弊毀showDay.length;i++){
showDay[i]=new JTextField();
showDay[i].setBackground(backColor);
showDay[i].setLayout(new GridLayout(3,3));
showDay[i].addMouseListener(this);
showDay[i].addFocusListener(this);
}
calendarMessage=new CalendarMessage();
calendarPad=new CalendarPad();
notePad=new NotePad();
Calendar calendar=Calendar.getInstance();
calendar.setTime(new Date());
year=calendar.get(Calendar.YEAR);
month=calendar.get(Calendar.MONTH)+1;
day=calendar.get(Calendar.DAY_OF_MONTH);
calendarMessage.setYear(year);
calendarMessage.setMonth(month);
calendarMessage.setDay(day);
calendarPad.setCalendarMessage(calendarMessage);
calendarPad.setShowDayTextField(showDay);
notePad.setShowMessage(year,month,day);
calendarPad.showMonthCalendar();
doMark(); //給有日志的號碼做標(biāo)亂備記,見后面的卜扮doMark()方法
calendarImage=new CalendarImage();
calendarImage.setImageFile(new File("sea.jpg"));
clock=new Clock();
JSplitPane splitV1=
new JSplitPane(JSplitPane.VERTICAL_SPLIT,calendarPad,calendarImage);
JSplitPane splitV2=
new JSplitPane(JSplitPane.VERTICAL_SPLIT,notePad,clock);
JSplitPane splitH=new JSplitPane(JSplitPane.HORIZONTAL_SPLIT,splitV1,splitV2);
add(splitH,BorderLayout.CENTER);
showYear=new JTextField(""+year,6);
showYear.setFont(new Font("TimesRoman",Font.BOLD,12));
showYear.setHorizontalAlignment(JTextField.CENTER);
showMonth=new JTextField(" "+month,4);
showMonth.setFont(new Font("TimesRoman",Font.BOLD,12));
showMonth.setHorizontalAlignment(JTextField.CENTER);
nextYear=new JButton("下年");
previousYear=new JButton("上年");
nextMonth=new JButton("下月");
previousMonth=new JButton("上月");
nextYear.addActionListener(this);
previousYear.addActionListener(this);
nextMonth.addActionListener(this);
previousMonth.addActionListener(this);
showYear.addActionListener(this);
JPanel north=new JPanel();
north.add(previousYear);
north.add(showYear);
north.add(nextYear);
north.add(previousMonth);
north.add(showMonth);
north.add(nextMonth);
add(north,BorderLayout.NORTH);
saveDailyRecord=new JButton("保存日志") ;
deleteDailyRecord=new JButton("刪除日志");
readDailyRecord=new JButton("讀取日志");
saveDailyRecord.addActionListener(this);
deleteDailyRecord.addActionListener(this);
readDailyRecord.addActionListener(this);
JPanel pSouth=new JPanel();
pSouth.add(saveDailyRecord);
pSouth.add(deleteDailyRecord);
pSouth.add(readDailyRecord);
add(pSouth,BorderLayout.SOUTH);
setVisible(true);//根據(jù)參數(shù) b 的值顯示或隱藏此 Window
setBounds(60,60,660,480);
validate();//驗證此容器及其所有子組件
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //設(shè)置用戶在此窗體上發(fā)起 "close" 時默認(rèn)執(zhí)行的操作
}
public void actionPerformed(ActionEvent e){
if(e.getSource()==nextYear){
year++;
showYear.setText(""+year);
calendarMessage.setYear(year);
calendarPad.setCalendarMessage(calendarMessage);
calendarPad.showMonthCalendar();
notePad.setShowMessage(year,month,day);
doMark();
}
else if(e.getSource()==previousYear){
year--;
showYear.setText(""+year);
calendarMessage.setYear(year);
calendarPad.setCalendarMessage(calendarMessage);
calendarPad.showMonthCalendar();
notePad.setShowMessage(year,month,day);
doMark();
}
else if(e.getSource()==nextMonth){
month++;
if(month12) month=1;
showMonth.setText(" "+month);
calendarMessage.setMonth(month);
calendarPad.setCalendarMessage(calendarMessage);
calendarPad.showMonthCalendar();
notePad.setShowMessage(year,month,day);
doMark();
}
else if(e.getSource()==previousMonth){
month--;
if(month1) month=12;
showMonth.setText(" "+month);
calendarMessage.setMonth(month);
calendarPad.setCalendarMessage(calendarMessage);
calendarPad.showMonthCalendar();
notePad.setShowMessage(year,month,day);
doMark();
}
else if(e.getSource()==showYear){
String s=showYear.getText().trim();
char a[]=s.toCharArray();
boolean boo=false;
for(int i=0;ia.length;i++)
if(!(Character.isDigit(a[i])))
boo=true;
if(boo==true) //彈出“警告”消息對話框
JOptionPane.showMessageDialog(this,"您輸入了非法年份","警告", JOptionPane.WARNING_MESSAGE);
else if(boo==false)
year=Integer.parseInt(s);
showYear.setText(""+year);
calendarMessage.setYear(year);
calendarPad.setCalendarMessage(calendarMessage);
calendarPad.showMonthCalendar();
notePad.setShowMessage(year,month,day);
doMark();
}
else if(e.getSource()==saveDailyRecord){
notePad.save(dir,year,month,day);
doMark();
}
else if(e.getSource()==deleteDailyRecord){
notePad.delete(dir,year,month,day);
doMark();
}
else if(e.getSource()==readDailyRecord)
notePad.read(dir,year,month,day);
}
public void mousePressed(MouseEvent e){
JTextField text=(JTextField)e.getSource();
String str=text.getText().trim();
try{ day=Integer.parseInt(str);
}
catch(NumberFormatException exp){
}
calendarMessage.setDay(day);
notePad.setShowMessage(year,month,day);
}
public void mouseReleased(MouseEvent e){}
public void mouseEntered(MouseEvent e) {}
public void mouseExited(MouseEvent e) {}
public void mouseClicked(MouseEvent e) {}
public void focusGained(FocusEvent e){
Component com=(Component)e.getSource();
com.setBackground(Color.red);
}
public void focusLost(FocusEvent e){
Component com=(Component)e.getSource();
com.setBackground(backColor);
}
public void doMark(){
for(int i=0;ishowDay.length;i++){
showDay[i].removeAll();
String str=showDay[i].getText().trim();
try{
int n=Integer.parseInt(str);
if(isHaveDailyRecord(n)==true){ //見后面的isHaveDailyRecord()方法
JLabel mess=new JLabel("存");
mess.setFont(new Font("TimesRoman",Font.PLAIN,11));
mess.setForeground(Color.black) ;
showDay[i].add(mess);
} }
catch(Exception exp){}
}
calendarPad.repaint();
calendarPad.validate();
}
public boolean isHaveDailyRecord(int n){
String key=""+year+""+month+""+n;
String [] dayFile=dir.list();
boolean boo=false;
for(int k=0;kdayFile.length;k++){
if(dayFile[k].equals(key+".txt")){
boo=true;
break;
} }
return boo;
}
public static void main(String args[]){
new CalendarWindow();
}
}
//CalendarPad類：
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
public class CalendarPad extends JPanel{
int year,month,day;
CalendarMessage calendarMessage;
JTextField [] showDay;
JLabel title[];
String [] 星期={"SUN/日","MON/一","TUE/二","WED/三","THU/四","FRI/五","SAT/六"};
JPanel north,center;
public CalendarPad(){
setLayout(new BorderLayout());
north=new JPanel();
north.setLayout(new GridLayout(1,7));
center=new JPanel();
center.setLayout(new GridLayout(6,7));
add(center,BorderLayout.CENTER);
add(north,BorderLayout.NORTH);
title=new JLabel[7];
for(int j=0;j7;j++){
title[j]=new JLabel();
title[j].setFont(new Font("TimesRoman",Font.BOLD,12));
title[j].setText(星期[j]);
title[j].setHorizontalAlignment(JLabel.CENTER);
title[j].setBorder(BorderFactory.createRaisedBevelBorder());
north.add(title[j]);
}
title[0].setForeground(Color.red);
title[6].setForeground(Color.blue);
}
public void setShowDayTextField(JTextField [] text){
showDay=text;
for(int i=0;ishowDay.length;i++){
showDay[i].setFont(new Font("TimesRoman",Font.BOLD,15));
showDay[i].setHorizontalAlignment(JTextField.CENTER);
showDay[i].setEditable(false);
center.add(showDay[i]);
}
}
public void setCalendarMessage(CalendarMessage calendarMessage){
this.calendarMessage=calendarMessage;
}
public void showMonthCalendar(){
String [] a=calendarMessage.getMonthCalendar();
for(int i=0;i42;i++)
showDay[i].setText(a[i]);
validate();
}
}
重慶分公司
重慶分公司
