diff --git a/flower_back/src/main/java/com/example/flower/mapper/xml/DiscountMapper.xml b/flower_back/src/main/java/com/example/flower/mapper/xml/DiscountMapper.xml
new file mode 100644
index 0000000..8c5a1a4
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+++ b/flower_back/src/main/java/com/example/flower/mapper/xml/DiscountMapper.xml
@@ -0,0 +1,49 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
+<mapper namespace="com.example.flower.mapper.DiscountMapper">
+    <select id="discountList" resultType="com.example.flower.entity.Discount">
+        select *
+        from flower.discount
+        order by discount_start_time desc
+    </select>
+    <select id="discountListByQuery" resultType="com.example.flower.entity.Discount">
+        select *
+        from flower.discount
+        <where>
+            <if test="discount_name != null and discount_name != '' ">
+                and discount_name like concat('%',#{discount_name},'%')
+            </if>
+        </where>
+        order by discount_start_time desc
+    </select>
+    <insert id="discountAdd" useGeneratedKeys="true" keyProperty="discount_id" parameterType="com.example.flower.entity.Discount">
+        insert into flower.discount(discount_name, discount_num,discount_f_id,discount_c_id,discount_start_time,discount_end_time)
+            value (#{discount_name},#{discount_num},#{discount_f_id},#{discount_c_id},#{discount_start_time},#{discount_end_time})
+    </insert>
+    <delete id="discountDeletePer">
+        delete
+        from flower.discount
+        where discount_id = #{discount_id}
+    </delete>
+    <delete id="discountDeleteMul" parameterType="Integer">
+        delete from flower.discount where discount.discount_id in
+        <foreach collection="discount_ids" open="(" close=")" separator="," item="id">
+            #{id}
+        </foreach>
+    </delete>
+    <select id="discountInfo" resultType="com.example.flower.entity.Discount">
+        select *
+        from flower.discount
+        where discount_id = #{discount_id}
+    </select>
+    <update id="discountModify" parameterType="com.example.flower.entity.Discount">
+        update flower.discount
+        set discount_name=if(#{discount_name} is not null and #{discount_name} != '',#{discount_name},discount_name),
+            discount_num=#{discount_num},
+            discount_f_id=#{discount_f_id},
+            discount_c_id=#{discount_c_id},
+            discount_start_time=if(#{discount_start_time} is not null and #{discount_start_time} != '',#{discount_start_time},discount_start_time),
+            discount_end_time=if(#{discount_end_time} is not null and #{discount_end_time} != '',#{discount_end_time},discount_end_time)
+        where discount.discount_id = #{discount_id}
+    </update>
+</mapper>
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