可以使用Java的Streams API来比较两个Maps>，并获取其中的差异。下面是实现的代码示例：

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

public class MapComparator {
    public static void main(String[] args) {
        Map> map1 = new HashMap<>();
        map1.put("key1", List.of("value1", "value2", "value3"));
        map1.put("key2", List.of("value4", "value5"));

        Map> map2 = new HashMap<>();
        map2.put("key1", List.of("value1", "value2", "value3"));
        map2.put("key3", List.of("value6", "value7"));

        // 找到map1中不在map2中的键值对
        Map> diff1 = map1.entrySet()
                .stream()
                .filter(e -> !map2.containsKey(e.getKey()) || !map2.get(e.getKey()).equals(e.getValue()))
                .collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue));

        System.out.println("diff1: " + diff1);

        // 找到map2中不在map1中的键值对
        Map> diff2 = map2.entrySet()
                .stream()
                .filter(e -> !map1.containsKey(e.getKey()) || !map1.get(e.getKey()).equals(e.getValue()))
                .collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue));

        System.out.println("diff2: " + diff2);
    }
}

运行以上示例代码的输出结果为：

diff1: {key2=[value4, value5]}
diff2: {key3=[value6, value7]}

其中，diff1为在map1中存在而在map2中不存在或者值不相等的键值对，diff2为在map2中存在而在`