mybatis懒加载

mybatis懒加载全局配置

   <settings>
        <setting name="mapUnderscoreToCamelCase" value="true"/>
        <!--开启懒加载(开启延迟加载)-->
        <setting name="lazyLoadingEnabled" value="true"/>
        <!--关闭实时加载-->
        <setting name="aggressiveLazyLoading" value="false"/>
    </settings>

 

<resultMap id="empAndDeptByStepResultMap" type="emp">
        <id column="emp_id" property="empId"></id>
        <result column="emp_name" property="empName"></result>
        <result column="age" property="age"></result>
        <result column="gender" property="gender"></result>
        <!--
           fetchType：lazy懒加载，eager立即加载
        -->
        <association property="dept"
                     column="dept_id"
                     select="org.example.mapper.DeptMapper.getEmpAndDeptByStepTwo" fetchType="lazy">
            <id column="dept_id" property="deptId"></id>
            <result column="dept_name" property="deptName"></result>
        </association>
    </resultMap>