是否可以使用java stream api根据值对象中的字段对映射进行分组，然后创建一个以字段为键、以原始键为值的新映射？

public class Person {
    private String name;
    private int age;

    // 构造函数、getter和setter省略
}

import java.util.*;
import java.util.stream.Collectors;

public class Main {
    public static void main(String[] args) {
        Map<String, Person> personMap = new HashMap<>();
        personMap.put("Alice", new Person("Alice", 25));
        personMap.put("Bob", new Person("Bob", 30));
        personMap.put("Charlie", new Person("Charlie", 25));
        personMap.put("David", new Person("David", 30));

        Map<Integer, List<String>> groupedByAge = personMap.entrySet().stream()
            .collect(Collectors.groupingBy(
                entry -> entry.getValue().getAge(),
                Collectors.mapping(entry -> entry.getKey(), Collectors.toList())
            ));

        System.out.println(groupedByAge);
    }
}

{25=[Alice, Charlie], 30=[Bob, David]}