如何将map key-value收集到value为集合的列表中

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class MapToList {
    public static void main(String[] args) {
        // 创建一个示例的map
        Map<String, String> map = new HashMap<>();
        map.put("key1", "value1");
        map.put("key2", "value2");
        map.put("key3", "value3");
        map.put("key4", "value2");
        map.put("key5", "value1");

        // 将map key-value收集到value为集合的列表中
        List<Map.Entry<String, List<String>>> resultList = new ArrayList<>();
        Map<String, List<String>> resultMap = new HashMap<>();

        for (Map.Entry<String, String> entry : map.entrySet()) {
            String key = entry.getKey();
            String value = entry.getValue();

            if (resultMap.containsKey(value)) {
                resultMap.get(value).add(key);
            } else {
                List<String> list = new ArrayList<>();
                list.add(key);
                resultMap.put(value, list);
            }
        }

        for (Map.Entry<String, List<String>> entry : resultMap.entrySet()) {
            resultList.add(entry);
        }

        // 输出结果
        for (Map.Entry<String, List<String>> entry : resultList) {
            System.out.println("Value: " + entry.getKey());
            System.out.println("Keys: " + entry.getValue());
            System.out.println();
        }
    }
}