搬运工游戏【推箱子】（开源）

1.示例

定义一个特殊map类型DepartmentMap

    <!-- 获取一级、二级科室-旧  deprecated -->
    <resultMap id="DepartmentMap" type="map">
        <id column="id" jdbcType="VARCHAR" property="deptCode" />
        <result column="name" jdbcType="VARCHAR" property="deptName" />
        <collection property="children" javaType="java.util.ArrayList" ofType="com.gg.midend.entity.SubDepartment">
            <id column="sub_id" jdbcType="VARCHAR" property="deptCode" />
            <result column="sub_name" jdbcType="VARCHAR" property="deptName" />
        </collection>
    </resultMap>

使用DepartmentMap类型

    <select id="selectDepartment" parameterType="map" resultMap="DepartmentMap">
        SELECT subDept.id AS sub_id,
               subDept.`name` AS sub_name,
               parDept.id,
               parDept.`name`
        FROM (SELECT * FROM sch_dept WHERE `level` = '2' AND active = '1') AS subDept
        LEFT JOIN (SELECT * FROM sch_dept WHERE `level` = '1' AND active = '1') AS parDept ON subDept.par_id = parDept.id
        WHERE parDept.hospital_id = #{hospitalId}
        ORDER BY parDept.`order`, subDept.id
    </select>

Java代码：