List去重-使用distinctByKey方法根据对象的属性进行去重

/*
 * @description:使用distinctByKey方法根据对象的属性进行去重
 * @author: zs
 * @date: 2023/12/18 14:29
 * @param: [keyExtractor]
 * @return: java.util.function.Predicate<T>
 **/
public static <T> Predicate<T> distinctByKey(Function<? super T, Object> keyExtractor){
    Map<Object,Boolean> seen = new ConcurrentHashMap<>();
    return t -> seen.putIfAbsent(keyExtractor.apply(t),Boolean.TRUE) == null;
}


public static void main(String[] args) {
   
    List<User> users = userList.stream().filter(distinctByKey((s -> s.getUserName()))).collect(Collectors.toList());

    List<String> repeatList = testList.stream().filter(DeduplicationUtil.distinctNotByKey(Student::getStuName)).map(Student::getStuName).collect(Collectors.toList());


}