JAVA 输入月份，用switch语句判断打印该月份的季节

import java.util.Scanner;
public class XMT_Ex2 {
    public static void main(String[] args){
        int month;
        while (true)
        {
            Scanner input = new Scanner(System.in);
            System.out.println("请输入一个月份：");
            month = input.nextInt();
            if (month > 0 && month <= 12) {
                break;
            }
            else {
                System.out.println("请重新输入一个大于0小于等于12的整数！");
            }
        }
        switch (month)
        {
            case 1:
            case 2:
            case 12:
                System.out.println(month + "月是冬天");
                break;
            case 3:
            case 4:
            case 5:
                System.out.println(month + "月是春天");
                break;
            case 6:
            case 7:
            case 8:
                System.out.println(month + "月是夏天");
                break;
            case 9:
            case 10:
            case 11:
                System.out.println(month + "月是秋天");
                break;
        }
    }
}