如何在Java 8中同时按值和键的自然顺序对Map进行排序

import java.util.Comparator;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.stream.Collectors;

public class MapSortingExample {
    public static void main(String[] args) {
        // 创建一个示例的Map
        Map<String, Integer> map = new HashMap<>();
        map.put("apple", 5);
        map.put("banana", 2);
        map.put("orange", 4);
        map.put("grape", 3);

        // 按值排序
        Map<String, Integer> sortedByValue = map.entrySet()
                .stream()
                .sorted(Map.Entry.comparingByValue())
                .collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue,
                        (oldValue, newValue) -> oldValue, LinkedHashMap::new));

        System.out.println("按值排序后的Map:");
        sortedByValue.forEach((key, value) -> System.out.println(key + ": " + value));

        // 按键排序
        Map<String, Integer> sortedByKey = map.entrySet()
                .stream()
                .sorted(Map.Entry.comparingByKey())
                .collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue,
                        (oldValue, newValue) -> oldValue, LinkedHashMap::new));

        System.out.println("按键排序后的Map:");
        sortedByKey.forEach((key, value) -> System.out.println(key + ": " + value));
    }
}

按值排序后的Map:
banana: 2
grape: 3
orange: 4
apple: 5
按键排序后的Map:
apple: 5
banana: 2
grape: 3
orange: 4