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选择结构switch中break只能跳出当前结构，无法跳出外部循环结构

package com.example03;

import java.util.Scanner;

public class BreakTest {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String s = null;
        while (true){
            s = scanner.next();
            switch (s){ //break只能跳出当前结构，while循环可以通过置标志来解决
                case "1":
                    System.out.println(s);
                    break;
                case "2":
                    System.out.println(s);
                    break;
                default:
                    System.out.println("-1");
                    break;
            }
        }
    }
}