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Calendar.java
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275 lines (261 loc) · 5.02 KB
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/*
* 输出日历 ：1900年以后的任意时期的月日历。
*
* 写完的java 源代码 用eclipse 生成可以运行的软件
* 将其导出为jar文件：右击要导出的文件-export-jar file
* 注意一定要选择Main class最后生成.jar文件,
* 运行时使用命令：java -jar xxx.jar
* 或者创建一个bat文件搜索，将上面的命令写入其中，
* 双击.bat文件执行jar命令即可
* 代码中右键->运行->Java应用程序，程序运行了，
* 对应的目录下面会生成后缀为class的文件，
* 只要有Jre的地方都可以运行class。
* 如果要变为exe的话，
* 下载exe4j来生成exe文件也可以。
*/
import java.util.*;
public class Calendar {
private final int epochYear = 1900;
private final int[] monthDays = {29, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
private int year;
private int month;
public void getInputData(){
Scanner input = new Scanner(System.in);
System.out.println("请输入年份：(年份为从1900年开始的任意年份时间，必须是整数。如：2018)");
this.year = input.nextInt();
while (!checkYear()){
System.out.println("对不起，您输入的年份非法，请再次输入你想查询的年份，谢谢！");
System.out.println("请输入年份：");
this.year = input.nextInt();
}
System.out.println("请输入月份：(月份为1,2,...,12中的任意月份。如：12)");
this.month = input.nextInt();
while (! checkMonth()){
System.out.println("对不起，您输入的月份非法，请再次输入你想查询的月份，谢谢！");
System.out.println("请输入月份：");
this.month = input.nextInt();
}
}
private boolean checkYear(){
return this.year >= this.epochYear;
}
private boolean checkMonth(){
return 1 <= this.month && this.month <= 12;
}
public long calculateDays(){
long days = 0;
for (int i = epochYear; i < year; i++){
days += 365;
if (((i%4 == 0) && (i%100 != 0)) || (i%400 == 0)){
days += 1;
}
}
for (int i = 1; i < month; i++){
days += getMonthDays(i, year);
}
return days;
}
private int getMonthDays(int monthNum, int yearNum){
if (monthNum == 2 && (((yearNum%4 == 0) && (yearNum%100 != 0)) || (yearNum%400 == 0))){
return monthDays[0];
}
return monthDays[monthNum];
}
public void printCalendar(long days){
// 打印日历星期头
System.out.println("日\t一\t二\t三\t四\t五\t六");
// 定位1号在本月中的星期位置
long offsetDay = days % 7;
for (int i = 0; i <= offsetDay; i++){
System.out.print("\t");
}
System.out.print("1\t");
// 打印本月的其他日期：依次按照1号日期顺序打印即可
int monthdays = getMonthDays(month, year);
for (int i = 2; i <= monthdays; i++){
if((offsetDay + i - 1) % 7 == 6){
System.out.println();
}
System.out.print(i+"\t");
}
}
public static void calendarManager(){
System.out.println("Welcome to my calendar app.");
Calendar calendar = new Calendar();
Scanner in = new Scanner(System.in);
int command = 1;
while (command == 1){
calendar.getInputData();
calendar.printCalendar(calendar.calculateDays());
System.out.println("\n\n\nContinue to use calendar app? (1/0)");
command = in.nextInt();
}
}
public static void main(String[] args){
Calendar.calendarManager();
}
/*********** version 0.1 ***********/
private void calendar_01(){
int sum = 0;
int i;
Scanner input = new Scanner(System.in);
System.out.println("请输入年份：");
int year = input.nextInt();
System.out.println("请输入月份：");
int month = input.nextInt();
for (i=1900; i<year; i++)
{
if (((i%4 == 0) && (i%100 != 0)) || (i%400 == 0))
{
sum += 366;
}
else
{
sum += 365;
}
}
/*
switch (month)
{
case 1:
{
if (month == 1)
{
break;
}
else
{
sum += 31;
}
}
case 2:
{
if (month == 2)
{
break;
}
else
{
if(((year%4 == 0) && (year%100 != 0)) || (year%400 == 0))
{
sum += 29;
}
else
{
sum += 28;
}
}
}
case 3:
{
if (month == 3)
{
break;
}
else
{
sum += 31;
}
}
case 4:
{
if (month == 4)
{
break;
}
else
{
sum += 30;
}
}
case 5:
{
if (month == 5)
{
break;
}
else
{
sum += 31;
}
}
case 6:
{
if (month == 6)
{
break;
}
else
{
sum += 30;
}
}
}
*/
for (i=1; i<month; i++)
{
if (i == 2)
{
if (((year%4 == 0) && (year%100 != 0)) || (year%400 == 0))
{
sum += 29;
}
else
{
sum += 28;
}
}
else
{
if ((i == 4) || (i == 6) || (i == 9) || (i == 11))
{
sum += 30;
}
else
{
sum += 31;
}
}
}
sum++; //1号，多加一天。
int weekday = sum%7;
System.out.println("日\t一\t二\t三\t四\t五\t六");
for (i=0; i<weekday; i++)
{
System.out.print("\t");
}
System.out.print("1\t");
int monthdays;
if (month == 2)
{
if (((year%4 == 0) && (year%100 != 0)) || (year%400 == 0))
{
monthdays = 29;
}
else
{
monthdays = 28;
}
}
else
{
if ((month == 4) || (month == 6) || (month == 9) || (month == 11))
{
monthdays = 30;
}
else
{
monthdays = 31;
}
}
for (i=2; i<=monthdays; i++)
{
if(sum%7 == 6)
{
System.out.println();
}
System.out.print(i+"\t");
sum++;
}
}
}