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我改造了一下你的代码 :
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package com.mikuma.calendar;
import java.util.GregorianCalendar;
import java.util.Scanner;
public class Calendar{
public static void main(String[] args){
int year = 0;
int month = 0;
Scanner scanner = new Scanner(System.in);
System.out.println("请输入您要查询的年份");
year = scanner.nextInt();
System.out.println("请输入您要查询的月份");
while (true){
month = scanner.nextInt();
if (month 0 || month 12){
System.out.println("月份输入有误，请重新输入");
}else{
break;
}
}
printPermanentCalendar(year, month);
}
/**
* 输出万年历
*
* @param year
* @param month
*/
private static void printPermanentCalendar(int year,int month){
int days = 0;
int totaldays = 0;//获取1990年至查询的年份的天数
for (int i = 1900; i year; i++){
totaldays = totaldays + (isLeapYear(i) ? 366 : 365);
}
int beforedays = 0;//到指定月份的天数
for (int i = 1; i = month; i++){
switch (i) {
case 1:
case 3:
case 5:
case 7:
case 8:
case 10:
case 12:
days = 31;
break;
case 4:
case 6:
case 9:
case 11:
days = 30;
break;
case 2:
days = isLeapYear(year) ? 29 : 28;
break;
default:
break;
}
if (i month){
beforedays = beforedays + days;
}
}
totaldays = totaldays + beforedays;//总计天数，以判断周几；
int weekDay = 0;
int temp = (1 + totaldays) % 7;
if (temp == 0){//1990年1月1日星期一，据此日0天星期一，以此类推
weekDay = 0;
}else{
weekDay = temp;
}
System.out.println("星期日\t星期一\t星期二\t星期三\t星期四\t星期五\t星期六");
for (int i = 0; i weekDay; i++){
System.out.print("\t");
}
for (int i = 1; i = days; i++){
System.out.print(i + "\t");
if ((totaldays + i) % 7 == 6){
System.out.print("\n");
}
}
}
private static boolean isLeapYear(int year){
return new GregorianCalendar().isLeapYear(year);
}
}
运行:
对比了下 360日历:
结果正确
我们再测试下 2017 年 2月
对比 360 日历
也是正确
/**
* @(#)AidyCalender.java
*
*
* @author
* @version 1.00 2008/7/19
*/
import java.awt.*;
import java.awt.event.*;
import java.lang.StringBuffer;
import javax.swing.*;
import java.util.*;
import javax.swing.Timer;
import javax.swing.border.*;
public class AidyCalender extends JFrame implements ActionListener,ItemListener{
Date date = new Date();
private GregorianCalendar gregorianCalendar = new GregorianCalendar();
//定义中英文字符数组存储星期信息,用于转换显示
private String[] stringWeekEn = new String[] { "SUN", "MON", "TUE", "WED",
"THU", "FRI", "SAT" };
private String[] stringWeekCn = new String[] { "星期日", "星期一", "星期二", "星期三",
"星期四", "星期五", "星期六" };
//定义存储月份的信息数组,用于转换显示方示
private String[] stringMonthEn = new String[] { "Jan", "Feb", "Mar", "Apr",
"May", "Jun", "Jul", "Aug", "Sept", "Oct", "Nov", "Dec" };
private String[] stringMonthCn = {"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"};
private String[] sysNowTime = new String[6];//sysNowTime 用于存储系统时间的变量
private String[] sysRunTime = new String[6];
private JLabel []labelWeek = new JLabel[7];
private JLabel []labelDay = new JLabel[42];
private JLabel labelTime = new JLabel();
private JPanel panel1 = new JPanel();
private JPanel panel2 = new JPanel();
private JPanel panel3 = new JPanel();
private JComboBox combo1 = new JComboBox();
private JComboBox combo2 = new JComboBox();
private JButton buttonToday = new JButton();
private Border border = BorderFactory.createRaisedBevelBorder();
private Border border1 = BorderFactory.createLineBorder(Color.cyan,3);
public AidyCalender(String title) {
super(title);
for (int y = 1900; y 2101; y++) {
combo1.addItem(" " + new Integer(y).toString()+"年");
}
for (int m = 0;m12;m++){
combo2.addItem(" "+stringMonthCn[m]);
}
buttonToday.setText("今 天");
setLayout(new FlowLayout());
add(panel1);
add(panel2);
add(panel3);
panel1.setLayout(new GridLayout(1,3,10,0));
panel1.add(combo1);
combo1.addItemListener(this);
panel1.add(combo2);
combo2.addItemListener(this);
panel1.add(buttonToday);
buttonToday.addActionListener(this);
labelTime.setFont(new Font("宋体",Font.PLAIN,16));
labelTime.setForeground(Color.MAGENTA);
panel1.add(labelTime);
Timer time = new Timer(1000,new TimerListener());
time.addActionListener(new TimerListener());
//time.setRepeats(true);
time.start();
//labelTime.addAncestorListener(new TimerListener());
panel2.setLayout(new GridLayout(7,7,0,10));
panel2.setBackground(Color.white);
for(int i=0;i7;i++){
labelWeek[i] = new JLabel();
labelWeek[i].setHorizontalAlignment(0);
if(i==0||i==6){
labelWeek[i].setBackground(Color.blue);
labelWeek[i].setForeground(Color.RED);
labelWeek[i].setFont(new Font("黑体",Font.BOLD,14));
}
else{
labelWeek[i].setForeground(Color.BLACK);
labelWeek[i].setFont(new Font("新宋体",Font.PLAIN,14));
}
labelWeek[i].setText(stringWeekCn[i]);
panel2.add(labelWeek[i]);
}
for(int i= 0;i42;i++){
labelDay[i] = new JLabel();
labelDay[i].setHorizontalAlignment(0);
labelDay[i].setText("");
panel2.add(labelDay[i]);
}
addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent e){
System.exit(0);
}
});
setSize(300,300);
setBounds(250, 200, 400, 360);
setVisible(true);
setResizable(false);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
getSysDate();
setNowDate();
}
public void actionPerformed(ActionEvent ae){
if(ae.getSource()==buttonToday){
setNowDate();
}
}
public void itemStateChanged(ItemEvent aa){
setChangeDate();
}
public int turnWeek(String week){
int i;
for(i=0;i7;i++)
if(week.equalsIgnoreCase(stringWeekEn[i]))
break;
return i;
}
public int turnMonth(String month){
/**
*int turnMonth(String month)
*@month 系统日期中的月,诸如Jan\Feb
*@return int
*返回一个整数值,用于寻找stringMonthCn[]数组中对应的中文月份
*/
int i;
for(i=0;i12;i++)
if(month.equalsIgnoreCase(stringMonthEn[i]))
break;
return i;
}
/**
*setNowDate()
*设置当前系统日期
*/
public void setNowDate(){
setSysDate(getNowYear(),getNowMonth());
getSysRunDate();
setDateNull();
combo1.setSelectedIndex(getShowYear() - 1900);
combo2.setSelectedIndex(getShowMonth());
setDays(getMonthDays(getNowYear(),getNowMonth()),getInitWeek(sysRunTime[0]),getNowDay());
//labelTime.setText(sysNowTime[3]);
//labelTime.setHorizontalAlignment(0);
}
/**Integer getShowYear()
*获取组合框中应该显示的年份
*/
public void setSysDate(int year,int month){
gregorianCalendar.set(year,month,1);
}
public void setDateNull(){
for(int i=0;i42;i++){
labelDay[i].setText("");
}
}
public void setChangeDate(){
setSysDate(getComboYear(),getComboMonth());
getSysRunDate();
setDateNull();
setDays(getMonthDays(getComboYear(),getComboMonth()),getInitWeek(sysRunTime[0]),-1);
}
public int getMonthDays(int year, int month) {
/**
*返回所选年月的天数,因为数组中的数值从0开始,所以3\5\8\10分别代表4\6\9\11几个小月.
*而1代表2月,经过是否为闰年判断,选择返回28或29天.
*其余月份为大月,返回31天.
**/
switch (month) {
case 3:
case 5:
case 8:
case 10:
return 30;//小月返回30天
case 1:
if (gregorianCalendar.isLeapYear(year)) {
//isLeapYear(year)确定当前纪元中的指定年份是否为闰年。
return 29;
} else {
return 28;
}//闰年的二月返回29天，平年返回28天
default:
return 31;
//大月返回31天
}
}
/**
*int getComboYear()
*获取组合框中的年份
*/
public void getSysDate(){
date = gregorianCalendar.getTime();
sysNowTime = (date.toString()).split(" ");
}
public void getSysRunDate(){
date = gregorianCalendar.getTime();
sysRunTime = (date.toString()).split(" ");
}
public int getComboYear(){
return combo1.getSelectedIndex()+1900;
}
/**
*int getComboMonth()
*获取月组合框中的整数值,
*/
public int getComboMonth(){
return combo2.getSelectedIndex();
}
public int getInitWeek(String initWeek){
/**
*getWeekNow(String initWeek)
*@para nowWeek 系统日期中的星期
*返回当月中的1号是从星期几开始
*/
int nowWeek = 0 ;
for(int i = 0;i7;i++){
if(initWeek.equalsIgnoreCase(stringWeekEn[i])){
nowWeek = i;
break;
}
}
return nowWeek;
}
public int getNowYear(){
return Integer.parseInt(sysNowTime[5]);
}
public int getNowMonth(){
int nowMonth=0;
for(int i=0;i12;i++){
if(sysNowTime[1].equalsIgnoreCase(stringMonthEn[i]));
nowMonth=i;
break;
}
return nowMonth;
}
public int getNowDay(){
return Integer.parseInt(sysNowTime[2]);
}
public Integer getShowYear(){
return Integer.parseInt(sysNowTime[5]);
}
public Integer getShowMonth(){
/**
*Integer getShowMonth()
*获取在组给框中显示的中文格式月份:如七月\八月等
*/
return turnMonth(sysNowTime[1]);
}
public void setDays(int monthDays,int initWeek,int day){
/**
*void setDays(int monthDays,int initWeek,int day)
*@para monthDays 本月天数
*@para initWeek 初始星期
*@para day 今天日
*设置月历
*/
setDateNull();
for(int i=initWeek;iinitWeek+monthDays+1;i++){
if((i-initWeek+1)==day){
labelDay[i].setBorder(border1);
labelDay[i].setForeground(Color.BLUE);
labelDay[i].setFont(new Font("黑体",Font.BOLD,20));
}else if((i%7==0)||(i%7==6))
labelDay[i].setForeground(Color.RED);
else{
labelDay[i].setForeground(Color.BLACK);
}
labelDay[i].setText(String.valueOf(i-initWeek+1));
}
for(int i=initWeek+monthDays;i42;i++)
labelDay[i].setText("");
}
class TimerListener implements ActionListener{
//AdapterDemo var=new AdapterDemo("万年历程序--Aidy");
public void actionPerformed(ActionEvent e) {
GregorianCalendar g = new GregorianCalendar();
String clock = new String((g.getTime().toString().split(" "))[3]);
labelTime.setText(clock);
}
}
public static void main(String args[])
{
try{
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
}catch(Exception e){
throw new RuntimeException(e);
}
AidyCalender var=new AidyCalender("万年历程序--Aidy");
}
}
本文来自CSDN博客，转载请标明出处：
/*
题目:输出任意年份任意月份的日历表(公元后)
思路:
1.已知1年1月1日是星期日,1 % 7 = 1 对应的是星期日,2 % 7 = 2 对应的是星期一,以此类推;
2.计算当年以前所有天数+当年当月1号之前所有天数;
a.年份分平年闰年,平年365天,闰年366天;
b.闰年的判断方法year % 400 == 0 || (year % 100 != 0 year % 4 == 0)若为真,则为闰年否则为平年;
c.定义平年/闰年数组,包含各月天数;
d.遍历数组求和,计算当年当月前总天数;
e.当年以前所有天数+当年当月前总天数+1即为1年1月1日到当年当月1日的总天数;
3.总天数对7取模,根据结果判断当月1号是星期几,输出空白区域;
4.输出当月日历表,逢星期六换行
*/
import java.util.Scanner;
class FindMonthList {
public static void main(String[] args){
Scanner sc = new Scanner(System.in);
System.out.println("请输入年份:");
int year = sc.nextInt(); //年份
if (year 1) { //判断非法输入年份
System.out.println("输入错误!");
return;
}
System.out.println("请输入月份:");
int month = sc.nextInt(); //月份
if (month 1 || month 12) { //判断非法输入月份
System.out.println("输入错误!");
return;
}
//输出表头
System.out.println("-------" + year + " 年 " + month + " 月 " + "-------");
System.out.println();
System.out.println("日 一 二 三 四 五 六");
//计算当前年份以前所有天数beforeYearTotalDay;每4年一个闰年,闰年366天,平年365天
int beforeYearTotalDay = ((year - 1) / 4 * 366) + (year-1 - ((year - 1) / 4)) * 365;
int[] arrLeapYear = {0,31,29,31,30,31,30,31,31,30,31,30,31}; //闰年各月天数 int数组
int[] arrNormalYear = {0,31,28,31,30,31,30,31,31,30,31,30,31}; //平年各月天数 int数组
int beforeMonthTotalDay = 0; //定义本年当月之前月份的总天数
if (year % 400 == 0 || (year % 100 != 0 year % 4 == 0)) { //判断当前年份是否是闰年
for (int i = 0 ; i month ; i ++ ) { //for循环计算当月之前总天数
//计算当前月份之前的所有天数
beforeMonthTotalDay = beforeMonthTotalDay + arrLeapYear[i];
}
//判断当月1日是星期几
int totalDay = beforeYearTotalDay + beforeMonthTotalDay + 1;
int week = totalDay % 7;//已知1年1月1日是星期日,即模7得1对应的是星期日
for (int i = 0 ; i (week - 1 + 7) % 7 ; i ++) { //如果写成i (week-1)会出现i-1的情况
System.out.print(" ");//输出开头空白
}
for (int i = 1 ;i = arrLeapYear[month] ;i ++ ) { //for循环输出各月天数
System.out.print(i + " ");
if (i 10 ) { //小于10的数补一个空格,以便打印整齐
System.out.print(" ");
}
if (i % 7 == ((7-(week - 1)) % 7 ) || i == arrLeapYear[month]) {//每逢星期六/尾数换行
System.out.println();
}
}
} else { //不是闰年就是平年
for (int i = 0 ; i month ; i ++ ) { //for循环计算出当月之前月份总天数
beforeMonthTotalDay = beforeMonthTotalDay + arrNormalYear[i];
}
//判断当月1日是星期几
int totalDay = beforeYearTotalDay + beforeMonthTotalDay + 1;
int week = totalDay % 7;//已知1年1月1日是星期日,即模7得1对应的是星期日
for (int i = 0 ; i (week - 1 + 7) % 7 ; i ++) { //如果写成i (week-1)会出现i-1的情况
System.out.print(" ");//输出开头空白
}
for (int i = 1 ;i = arrNormalYear[month] ;i ++ ) {//for循环输出各月天数
System.out.print(i + " ");
if (i 10 ) { //小于10的数补一个空格,以便打印整齐
System.out.print(" ");
}
if (i % 7 == ((7-(week - 1)) % 7 ) || i == arrNormalYear[month]) {//每逢星期六/尾数换行
System.out.println();
}
}
}
}
}
显示效果: