@Override

    public Page<ProductInfo> findAll(Pageable pageable, ProductInfo productInfo) {

	//创建一个操作聚合operations

        List<AggregationOperation> operations = new ArrayList<>();

	//创建一个条件类criteria

        Criteria criteria = new Criteria();

	//商品状态不为空

        if (productInfo.getProductStatus()!=null){

	　　 //productStatus等于查询的商品状态这个条件添加进操作聚合operations

            operations.add(Aggregation.match(criteria.and("productStatus").is(productInfo.getProductStatus())));

        }

        long totalCount = 0;

        //总页数

        if (operations!= null && operations.size() > 0){

	    //操作聚合

            Aggregation aggregationCount = newAggregation(operations);

	    //查询总的数据条数，返回一个集合

            AggregationResults<ProductInfo> resultsCount = mongoTemplate.aggregate(aggregationCount, "productInfo", ProductInfo.class);

            totalCount = resultsCount.getMappedResults().size();

        }else{

	    //操作聚合为空，查询总的数据条数

            totalCount = mongoTemplate.findAll(ProductInfo.class).size();

        }

	//操作聚合添加页数乘以每页大小等于总页数

        operations.add(Aggregation.skip((long) (pageable.getPageNumber()) * pageable.getPageSize()));

	//操作聚合添加返回一页的数据

        operations.add(Aggregation.limit(pageable.getPageSize()));

	//操作聚合添加根据solveCount降序排序

        // operations.add(Aggregation.sort(Sort.Direction.DESC, "solveCount"));

        Aggregation aggregation = newAggregation(operations);

	//根据条件查询数据

        AggregationResults<ProductInfo> results = mongoTemplate.aggregate(aggregation, "productInfo", ProductInfo.class);

	//返回结果的map和分页信息和总记录数

        return new PageImpl<>(results.getMappedResults(),pageable,totalCount);

    }