1.批量删除

@Delete({"<script>",
            "delete from li_print_goods_connection where printer_id = #{printerId} and goods_id in ",
            "<foreach collection='list' item='goodsId' open='(' separator=',' close=')'>",
            "#{goodsId}",
            "</foreach>",
            "</script>"})
Integer deletePrinterBindAll(String printerId, List<String> list);

2.批量查询

@Select({"<script>" +
            "select goods_name,id from li_goods where id in " +
            "<foreach item='goodsId' index='index' collection='list' open='(' separator=',' close=')'>" +
            "#{goodsId}",
            "</foreach>",
            "</script>"})
List<Goods> getGoodsList(List<String> goodsIds);

同理，更新、插入只需要将注解更换为update和insert即可。

注意：

1. 参数如果没有@Param指定，collection的值为list，不能为其他，用单引号即可，不用#{}包含

2. item是循环集合中的单个值引用，与<foreach></foreach>标签内的值对应，标签内的参数需要用#{}包含

借鉴(32条消息) mybaits-plus批量添加、修改、删除（注解）_slowly_jin的博客-CSDN博客_mybatis-plus批量修改