java日历学习

package Test4;

import java.util.Scanner;
import java.util.GregorianCalendar;
import java.util.Calendar;

public class Rili {
    final static String blank="      ";
    final static String border="  |   ";
    public static void PrintWeek()
    {
        String [] week={"周日","周一","周二","周三","周四","周五","周六"};
        for(int i=0;i<3;i++)
        {    for(String element:week)
        {
            System.out.printf(" %s"+" ",element);
        }
            if(i<2)
                System.out.print(border);
            else
                System.out.println(blank);
        }
    }
    public static void PrintFestival(GregorianCalendar day,int month)
    {
        for(int i=7;i>=1;i--)
        {
            day.add(Calendar.DAY_OF_MONTH,-i);
            int monthday=day.get(Calendar.DAY_OF_MONTH);
            if(month-1==day.get(Calendar.MONTH))
            {if(month==1&&monthday==1)        System.out.print("元旦节");
            else if (month==4&&monthday==1)     System.out.print("愚人节");
            else if (month==5&&monthday==1)        System.out.print("劳动节");
            else if (month==3&&monthday==8)         System.out.print("妇女节");
            else if (month==6&&monthday==1)     System.out.print("儿童节");
            else if (month==7&&monthday==1)         System.out.print("建党节");
            else if (month==8&&monthday==1)        System.out.print("建军节");
            else if (month==9&&monthday==10)        System.out.print("教师节");
            else if (month==10&&monthday==1)       System.out.print("国庆节");
            else if (month==11&&monthday==11)       System.out.print("双十一");
            else if (month==12&&monthday==25)       System.out.print("圣诞节");
            else System.out.print(blank);

            }

            else System.out.print(blank);
            day.add(Calendar.DAY_OF_MONTH,i);

        }
    }
    public static void PrintBorderLine(String symbol1,String symbol2,String symbol3)
    {
        for(int j=1;j<4;j++)
        {
            for(int k=1;k<8;k++)
                System.out.print(symbol1);
            if(j<3) System.out.print(symbol2);
            else    System.out.println(symbol3);
        }
    }

    public static void PrintLine(GregorianCalendar day,int m,int month,int year)
    {
        int week = day.get(Calendar.DAY_OF_WEEK);
        GregorianCalendar today = new GregorianCalendar ();
        if(m==1)
        {       for(int i=0;i<week-1;i++)
            System.out.print(blank);
            for(int i=0;i<=7-week;i++)
            {       if(day==today)
                System.out.printf("%4d* ",day.get(Calendar.DAY_OF_MONTH));
            else System.out.printf("%4d  ",day.get(Calendar.DAY_OF_MONTH));
                day.add(Calendar.DAY_OF_MONTH,1);
            }
        }
        if(m>=2&&m<=4)
        {    for(int i=1;i<=7;i++)
        {
            if(year==today.get(Calendar.YEAR)&&month==today.get(Calendar.MONTH)&&today.get(Calendar.DAY_OF_MONTH)==day.get(Calendar.DAY_OF_MONTH))
                System.out.printf("%4d* ",day.get(Calendar.DAY_OF_MONTH));
            else      System.out.printf("%4d  ",day.get(Calendar.DAY_OF_MONTH));
            day.add(Calendar.DAY_OF_MONTH,1);
        }

        }


        if(m>=5)
        {
            for(int i=1;i<=7;i++)
            {    if(month==day.get(Calendar.MONTH))
            {
                if(year==today.get(Calendar.YEAR)&&month==today.get(Calendar.MONTH)&&today.get(Calendar.DAY_OF_MONTH)==day.get(Calendar.DAY_OF_MONTH))
                    System.out.printf("%4d* ",day.get(Calendar.DAY_OF_MONTH));
                else            System.out.printf("%4d  ",day.get(Calendar.DAY_OF_MONTH));
            }
            else System.out.print(blank);
                day.add(Calendar.DAY_OF_MONTH,1);

            }
        }
    }
    public static void printmonth(int month)
    {
        for(int i=1;i<=3;i++)
            System.out.print(blank);
        if(month==1)    System.out.print("*一月*");
        else if (month==2)    System.out.print("*二月*");
        else if (month==3)    System.out.print("*三月*");
        else if (month==4)    System.out.print("*四月*");
        else if (month==5)    System.out.print("*五月*");
        else if (month==6)    System.out.print("*六月*");
        else if (month==7)    System.out.print("*七月*");
        else if (month==8)    System.out.print("*八月*");
        else if (month==9)    System.out.print("*九月*");
        else if (month==10)    System.out.print("*十月*");
        else if (month==11)    System.out.print("*十一*");
        else if (month==12)    System.out.print("*十二*");

        for(int i=1;i<=3;i++)
            System.out.print(blank);

    }
    public static void main(String[] args)
    {    Scanner in = new Scanner(System.in);
        System.out.println("请输入四位年份...");
        int  year = in.nextInt();
        System.out.println("");
        System.out.println("");

        for (int i=1;i<=10;i++) System.out.print(blank);
        System.out.printf("***%4d年日历如下***",year);
        System.out.println("");
        System.out.println("");

        for(int i=1;i<=4;i++)
        {
            PrintWeek();
            PrintBorderLine(blank,"  |   ",blank);
            GregorianCalendar day1 = new  GregorianCalendar(year,3*i-3,1);
            GregorianCalendar day2 = new  GregorianCalendar(year,3*i-2,1);
            GregorianCalendar day3 = new  GregorianCalendar(year,3*i-1,1);

            for(int m=1;m<=6;m++)
            {
                PrintLine(day1,m,3*i-3,year);
                System.out.print(border);

                PrintLine(day2,m,3*i-2,year);
                System.out.print(border);

                PrintLine(day3,m,3*i-1,year);
                System.out.println(blank);

                PrintFestival(day1,3*i-2);
                System.out.print(border);

                PrintFestival(day2,3*i-1);
                System.out.print(border);

                PrintFestival(day3,3*i);
                System.out.println(blank);
                PrintBorderLine(blank,"  |   ",blank);
            }

            printmonth(3*i-2);
            System.out.print(border);
            printmonth(3*i-1);
            System.out.print(border);
            printmonth(3*i);
            System.out.println(blank);


            PrintBorderLine("------","--+---",blank);
            if(i<4)    PrintBorderLine(blank,"  |   ",blank);
        }
    }

}