add set meal or dish into shopping cart

sky-server/src/main/resources/mapper/ShoppingCartMapper.xml

@@ -0,0 +1,24 @@
+<?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.sky.mapper.ShoppingCartMapper">
+
+    <select id="list" resultType="com.sky.entity.ShoppingCart">
+        select * from sky_take_out.shopping_cart
+        <where>
+            <if test="userId != null">
+                and user_id = #{userId}
+            </if>
+            <if test="setmealId != null">
+                and setmeal_id = #{setmealId}
+            </if>
+            <if test="dishId!= null">
+                and dish_id = #{dishId}
+            </if>
+            <if test="dishFlavor != null">
+                and dish_flavor = #{dishFlavor}
+            </if>
+        </where>
+    </select>
+</mapper>