探花交友: mongoDB统计函数

TypedAggregation参数1: 需要操作的类
TypedAggregation参数2: 查询条件Criteria
TypedAggregation参数3: 采样数

        //构造统计函数
        TypedAggregation<RecommendUser> aggregation = new TypedAggregation<>(RecommendUser.class,
                Aggregation.match(criteria), Aggregation.sample(10));
        //查询
        AggregationResults<RecommendUser> aggregate = mongoTemplate.aggregate(aggregation, RecommendUser.class);
        //返回
        return aggregate.getMappedResults();