import java.util.Scanner;
class CalendarMain{ //主函数入口 public static void main(String[] args) { System.out.println("*****请输入日期(格式如: 2011-01)*****"); Scanner sc = new Scanner(System.in); String ym = sc.next(); //截取字符串 String[] yearMonth = ym.split("-"); //将字符串转化成整型 int year = Integer.parseInt(yearMonth [0]); int month = Integer.parseInt(yearMonth [1]); Year.fun(year); Month.fun(month,year); }}//获取闰年个数class Year{ //多少个闰年 static int leapYear = 0; public static void fun(int year){ if(year > 1990 && year <10000){ while(year >= 1990){ if(year % 4 == 0 && year % 100 != 0 || (year % 400 ==0 )){ leapYear ++; } year --; } }else{ System.out.println("请输入查询的年份大于或等于1990年!"); } }}//获取一个月多少天和总天数class Month{ public static void fun(int month,int year){ int monthDay = 0; Year y = new Year(); int days = y.leapYear + (year - 1990)*365; if(month > 0 && month <=12){ for(int i = 1;i <= month;i++){ if(i < 8 && i != 2){ days += i % 2 == 1 ? 31 :30; monthDay = i % 2 == 1 ? 31 :30; } if(i > 7){ days += i % 2 == 1 ? 30 :31; monthDay = i % 2 == 1 ? 30 :31; } if(i == 2){ if(year % 4 == 0 && year % 100 != 0 || (year % 400 ==0 )){ days += 28; monthDay = 29; }else{ days += 28; monthDay = 28; } } } Show.mothed(days,monthDay); }else{ System.out.println("请输入正确的月份！"); } }}//显示日历class Show{ public static void mothed(int days, int monthDay){ //加一表示从星期一开始 int week = (days - monthDay) % 7 + 1; System.out.println("\n周日"+"\t周一"+"\t周二"+"\t周三"+"\t周四"+"\t周五"+"\t周六"); for (int i = 1;i <= monthDay + week ;i++ ) { if(i <= week){ System.out.print(" "+"*"+"\t"); }else{ if((i-week) < 10){ System.out.print(" "+(i-week)+"\t"); }else{ System.out.print((i-week)+"\t"); } } if(i%7 == 0){ System.out.print("\n"); } } }}