过滤动态热销商品，3次重新加入数据

yujian

2019-08-05 87976c4c8b4435ad896d94deae7d6640c1993ffa

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package com.yeshi.fanli.dao.mybatis;
 
 
public interface ScanHistoryMapper {
 
    long countUserScanHistory(Long userId);
    
}