我有一个api rest，SpringBoot连接到一个mangodb数据库。我在“标题”字段的“技能”集合中创建了一个自动完成索引。我试图用这个索引搜索技能，聚合是：{'$search'：{

'autocomplete': {
    'query': 'Java', 
    'path': 'title', 
    'fuzzy': {
      'maxEdits': 2, 
      'prefixLength': 3
    }
  }
}

}服务是：

{
   MongoCollection<Document> collection = mongoClient.getDatabase("test").getCollection("skills");

    BasicDBObject autocomplete = new BasicDBObject ();
    autocomplete.append("query", wordToSearch);
    autocomplete.append("path", "title");

    BasicDBObject autocom = new BasicDBObject ("autocomplete", autocomplete);

    BasicDBObject search = new BasicDBObject ("$search", autocom);
    logger.info("Search Aggregation " + search.toJson());

    List <BasicDBObject> pileline = new ArrayList<BasicDBObject>();
    pileline.add(search);

    AggregateIterable<Document> result = collection.aggregate(pileline);
    return result.first();}

我的休息控制器是：

@GetMapping("/skill/search")
public Document searchSkills(@RequestParam String wordToSearch){

    Document skills = skillService.searchSkills(wordToSearch);

    return skills;

}

但我得到一个异常：“命令失败，错误为40324（location40324）：'无法识别的管道阶段名称：'$search'（服务器上）localhost:27017. 完整响应为{“ok”：0.0，“errmsg”：“unrecognized pipeline stage name:'$search'”，“code”：40324，“codename”：“location40324”}”
谢谢你的帮助！