<?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.sincere.student.mapper.AreaMapper"> <resultMap id="AreaMap" type="com.sincere.student.model.Area"> <result column="area_code" property="code"/> <result column="area_name" property="name"/> </resultMap> <select id="getProvince" resultMap="AreaMap"> select * from sys_area where len(area_code)=2 </select> <select id="getCity" parameterType="java.lang.String" resultMap="AreaMap"> select * from sys_area where len(area_code) > 2 and area_code like #{code} </select> </mapper>