mybatis主表与明细表一对多的同时插入操作方法

对主表（采购申请表）和明细表（申请物资表）同时进行插入操作insert：

<!--对申请主表插入一条记录 -->
<insert id="save" parameterType="com.bootdo.purchase.domain.ApplyDo" useGeneratedKeys="true" keyProperty="applyId">
    INSERT INTO pur_apply
    (apply_no,apply_depart_id,apply_person_id,apply_date,apply_estiamount,apply_status)
    VALUES
    (#{applyNo},
    (SELECT dept_id FROM mat_department WHERE dept_name = #{deptName} ),
    (SELECT sta_id FROM mat_staff WHERE sta_name = #{staName} ),
    #{applyDate},#{applyEstiAmount},#{applyStatus})
    &开发者_C教程lt;selectKey keyProperty="applyId" resultType="Integer" order="AFTER">
        SELECT LAST_INSERT_ID()
    </selectKey>
</insert>

以上注：useGeneratedKeys="true" keyProperty="applyId"  或  <selectKey keyProperty="applyId" resultTypeeXefo="Integer" order="编程;AFTER"> SELECT LAST_INSERT_ID() </selectKey>，可获取数据表中的自增的aphttp://www.devze.comply_jsid存放在持久类ApplyDo中的属性名applyId,applyId也是明细表对应主表的外键，对应持久类ApplyItemDo中的属性名itemApplyId.

<!--对明细表插入单条记录 -->
<insert id="saveDetail" parameterType="com.bootdo.purchase.domain.ApplyItemDo" >
    INSERT INTO pur_apply_detail
    (item_apply_id,item_name,item_type,item_number,item_unit,item_estiprice,item_purpose,item_demdate,item_remake)
    VALUES
    (#{itemApplyId},#{itemName},#{itemType},#{itemNumber},#{itemUnit},#www.devze.com{itemEstiprice},#{itemPurpose},#{itemDemdate},#{itemRemake})
</insert>

ApplyServiceImpl.Java:

@Autowired
public ApplyDao applyDao;
@Override
public int save(ApplyDo applyDo) {
    //主表插入一条记录
    int count = applyDao.save(applyDo);
    int count2 = 0;
    int applyId = applyDo.getApplyId();
    //明细表插入多条记录
    for(ApplyItemDo items : applyDo.getItemDoList() ){
        items.setItemApplyId(applyId);
        count2 = applyDao.saveDetail(items);
    }
    return count2;
}

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