Bonus-Cloud-Material-Mall/bonus-modules/bonus-material-mall/src/main/resources/mapper/material/project/RegionMapper.xml

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XML

<?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.bonus.material.project.mapper.RegionMapper">
<resultMap id="RegionLabelValueMap" type="com.bonus.material.project.domain.Region">
<result column="id" property="id"/>
<result column="short_name" property="short_name"/>
<result column="area_code" property="areaCode"/>
</resultMap>
<!-- 1. 查询所有省份 -->
<select id="selectAllProvinces" resultMap="RegionLabelValueMap">
SELECT
id,
area_code,
name
FROM
sys_cnarea
WHERE
level = 1
</select>
<!-- 2. 根据省份ID查询城市 -->
<select id="selectCitiesByProvinceId" resultMap="RegionLabelValueMap">
SELECT
id,
area_code,
name
FROM
sys_cnarea
WHERE
level = 2
AND parent_code = #{provinceAreaCode}
</select>
<!-- 3. 根据城市ID查询区县 -->
<select id="selectDistrictsByCityId" resultMap="RegionLabelValueMap">
SELECT
id,
area_code,
name
FROM
sys_cnarea
WHERE
level = 3
AND parent_code = #{cityAreaCode}
</select>
<select id="getNameByCode" resultType="java.lang.String">
select name from sys_cnarea where area_code=#{area_code}
</select>
</mapper>