ADD file via upload

flower_back/src/main/java/com/example/flower/mapper/DiscountMapper.java

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+package com.example.flower.mapper;
+
+import com.example.flower.entity.Discount;
+import org.apache.ibatis.annotations.Mapper;
+import org.springframework.stereotype.Repository;
+
+import java.util.List;
+
+@Mapper
+@Repository
+public interface DiscountMapper {
+    List<Discount> discountList(); //获取所有折扣信息
+    List<Discount> discountListByQuery(String discount_name);//查询折扣信息列表
+    void discountAdd(Discount discount); //添加新折扣
+    int discountDeletePer(int discount_id); //删除单个折扣
+    int discountDeleteMul(int[] discount_ids); //批量删除折扣
+    Discount discountInfo(int discount_id); //获取折扣信息
+    int discountModify(Discount discount); //修改折扣信息
+}