java 操作mongodb Aggregation 分组查询及 排序

直接上代码：

Aggregation agg = Aggregation.newAggregation(Resional.class,
        Aggregation.match(Criteria.where("createTime").gte(req.getStartTime())
                .lte(req.getEndTime())),
        Aggregation.group("createUserId").count().as("count"),
        Aggregation.sort(Sort.Direction.DESC, "count")
);
AggregationResults<ExportExcelResourceListDto> aggregate = 
mongoTemplate.aggregate((TypedAggregation<?>) agg, 
ExportExcelResourceListDto.class);
return aggregate.getMappedResults();