如何使用Java streams在groupby之后应用排序和限制

import java.util.Arrays;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

public class Main {
    public static void main(String[] args) {
        // 示例数据
        List<Person> persons = Arrays.asList(
                new Person("Alice", 25),
                new Person("Bob", 30),
                new Person("Alice", 20),
                new Person("Bob", 35),
                new Person("Alice", 28)
        );

        // 使用Java Streams进行groupby、排序和限制
        Map<String, List<Person>> groupedAndSorted = persons.stream()
                .collect(Collectors.groupingBy(Person::getName))
                .entrySet().stream()
                .sorted(Map.Entry.comparingByKey()) // 按照名称排序
                .limit(2) // 限制结果数量为2
                .collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue));

        // 输出结果
        groupedAndSorted.forEach((name, people) -> {
            System.out.println("Name: " + name);
            System.out.println("People: " + people);
            System.out.println();
        });
    }

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

        public Person(String name, int age) {
            this.name = name;
            this.age = age;
        }

        public String getName() {
            return name;
        }

        public int getAge() {
            return age;
        }

        @Override
        public String toString() {
            return "Person{" +
                    "name='" + name + '\'' +
                    ", age=" + age +
                    '}';
        }
    }
}