Java实现指定年份月份的日历表

输入指定的年份与月份，看这个月的日历表

package Xueying_Liu;

import java.util.Scanner;

public class rilibiao {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        System.out.println("请输入您选择的年份");
        int year = sc.nextInt();
        System.out.println("请输入您选择的月份");
        int month = sc.nextInt();
        //记录一共有多少天
        int count = 1;

        //从1990年到输入的这一年之前一共有多少天
        for (int i = 1990; i < year; i++) {
            if ((i % 4 == 0 && i % 100 != 0) || i % 400 == 0) {
                count += 366;
            } else {
                count += 365;
            }
        }
        //看输入的那一年是不是闰年
        boolean bool = false;
        if ((year % 4 == 0 && year % 100 != 0) || year % 400 == 0) {
            bool = true;
        }
//看输入的那一年在这个月之前有多少天
        for (int i = 1; i < month; i++) {
            switch (i) {
                case 1:
                case 3:
                case 5:
                case 7:
                case 8:
                case 10:
                case 12:
                    count += 31;
                    break;
                case 2:
                    if (bool)
                        count += 29;
                    else
                        count += 28;
                    break;
                default:
                    count += 30;
            }
        }

//记录那个月有多少天
        int day = 0;
        switch (month) {
            case 1:
            case 3:
            case 5:
            case 7:
            case 8:
            case 10:
            case 12:
                day = 31;
                break;
            case 2:
                if (bool)
                    day = 29;
                else
                    day = 28;
                break;
            default:
                day = 30;

        }

        //   System.out.println(count);
        System.out.println("周日\t周一\t周二\t周三\t周四\t周五\t周六\t");
        //week记录是周几,周日为0
        int week = count % 7;
        //这个月第一天可能不是周日，需要输出空格
        for (int i = 0; i < week; i++) {
            System.out.print("\t\t");
        }
        for (int i = 1; i <= day; i++) {
            //每加一天，week加一,当这一周满了以后，就会换行
            if (week == 7) {
                System.out.println();
                week = 0;
            }
            week++;
            System.out.print(i + "\t\t");
        }

    }
}