code: public MongoQuery in(String key, List values) {
          if ("_id".equals(key)) {
              List<ObjectId> idList = new ArrayList<ObjectId>();
  
              Iterator iter = values.iterator();
              while (iter.hasNext()) {
                  Object value = (Object) iter.next();
                  idList.add(new ObjectId(String.valueOf(value)));
              }
              query.add(Filters.in(key, idList));
          } else {
              query.add(Filters.in(key, values));
          }
  
          return this;
      }
docs: 支持查询id