根据输入的日期计算该日期在本年的天数

package day_09;
/*
根据输入的日期计算该日期在本年的天数
 */
import java.util.Scanner;

public class Test {
    public static void main(String[] args) {
        //输入日期
        Scanner input = new Scanner(System.in);
        System.out.print("请输入年月日：");
        int year = input.nextInt();
        int month = input.nextInt();
        int day = input.nextInt();
        //计算对应的天数
        int sumday = getSumDay(year, month, day);
        //输出结果
        System.out.println(year + "年" + month + "月" + day + "日" + "是" + year + "年的第" + sumday + "天");
    }

    private static int getSumDay(int year, int month, int day) {
        int days = 0;
        for (int i = 1; i <month; i++) {
            days += getMonthDay(year,i);
        }
        return days+day;
    }

    private static int getMonthDay(int year,int month) {
        int day=0;
        switch (month) {
            case 1:
            case 3:
            case 5:
            case 7:
            case 8:
            case 10:
            case 11:
                day=31;
                break;
            case 2:
                //如果是闰年：29天，否则是：28天
                day=getDay(year);
                break;
            case 4:
            case 6:
            case 9:
            case 12:
                day=30;
                break;
        }
        return day;
    }

    private static int getDay(int year) {
        if(year%4==0 || (year%100==0 && year%400==0))
            return 29;
        else
            return 28;
    }
}