mybatis-plus 关联子表查询

单个实体关联查询：

<resultMap id="transactionResultMapEmpower" type="com.xxxx.dal.dataobject.transaction.TransactionDO2" >

<id property="id" column="id"/>

<result property="traderUnitsName" column="trader_units_name"/>

<result property="transactionAmount" column="transaction_amount"/>

<result property="transactionDate" column="transaction_date"/>

<result property="transactionStatus" column="transaction_status"/>

<result property="transactionApplicationTime" column="transaction_application_time"/>

<result property="transactionApplicationUnitName" column="transaction_application_unit_name"/>

<result property="valueEvaluationType" column="value_evaluation_type"/>

<result column="result_id" jdbcType="INTEGER" property="resultId" />

<association property="resultinfoDO"

javaType="com.xxxx.dal.dataobject.resultinfo.ResultinfoDO"

column="result_id"

select="com.ixxxx.dal.mysql.resultinfo.ResultinfoMapper.selectById"

fetchType="eager" >

</association>

</resultMap>

设置mybatis二级缓存策略：

添加一个属性fetchType="eager" (急加载)

集合查询：

<collection property="roles" ofType="Role"

select="com.jd.wms.mapper.RoleMapper.selectRolesByEmployeeId" column="id">

</collection>