mybatis报错问题:
dao层: List<HqjTrade> queryHongbao(ArrayList<String> listType); 映射文件下sql: <select id="queryHongbao" resultType="HqjTrade" > select * from hqj_trade where tradetype in <foreach collection="listType" open="(" close=")" separator="," item="tradetype"> #{tradetype} </foreach> </select>
运行报错:Parameter ‘listType‘ not found. Available parameters are [collection, list]
解决:1.通用方法,在dao层参数上加上@Param("listType"),所以养成加@Param是个好习惯
注意:也不是任何参数之前就加上@Param,实体类之前不需要加上注解@Param
Parameter 'xxx' not found. Available parameters are [collection, list]
原文：https://www.cnblogs.com/caoxs/p/9229128.html