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ruoyi-system/src/main/resources/mapper/erp/RegionMapper.xml

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+<?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.ruoyi.erp.mapper.RegionMapper">
+
+    <resultMap id="RegionMap" type="com.ruoyi.erp.domain.Region">
+        <result property="provId" column="prov_id" />
+        <result property="provName" column="prov_name" />
+        <result property="cityId" column="city_id" />
+        <result property="cityName" column="city_name" />
+        <result property="areaId" column="area_id" />
+        <result property="areaName" column="area_name" />
+    </resultMap>
+
+    <select id="selectProvinces" resultMap="RegionMap">
+        SELECT DISTINCT prov_id, prov_name, 0 AS city_id, '' AS city_name, 0 AS area_id, '' AS area_name
+        FROM xgj_region
+        ORDER BY prov_id
+    </select>
+
+    <select id="selectCitiesByProv" parameterType="int" resultMap="RegionMap">
+        SELECT DISTINCT prov_id, prov_name, city_id, city_name, 0 AS area_id, '' AS area_name
+        FROM xgj_region
+        WHERE prov_id = #{provId}
+        ORDER BY city_id
+    </select>
+
+    <select id="selectAreasByCity" resultMap="RegionMap">
+        SELECT prov_id, prov_name, city_id, city_name, area_id, area_name
+        FROM xgj_region
+        WHERE prov_id = #{provId} AND city_id = #{cityId}
+        ORDER BY area_id
+    </select>
+
+</mapper>
+
+