DAO层方法：

/**
 * 
 * @param planPurchaseId
 * @param goodsDbIdList
 * @return
 */
List<ProjectPlanReqDetail> selectPlanReqDetail(@Param("planPurchaseId") String planPurchaseId, @Param("goodsDbIdList") List<String> goodsDbIdList);

<!--  -->
<select id="selectPlanReqDetail" resultMap="ProjectPlanReqDetailMap">
    SELECT
    PROJECT_PLAN_REQ_DETAIL.PLAN_DETAIL_ID,
    PROJECT_PLAN_REQ_DETAIL.PLAN_PURCHASE_ID,
    PROJECT_PLAN_REQ_DETAIL.PLAN_MAT_CODE,
    PROJECT_PLAN_REQ_DETAIL.PLAN_REQ_NUM_NOW,
    PROJECT_PLAN_REQ_DETAIL.PLAN_ALREADY_BUY_NUM,
    PROJECT_PLAN_REQ_DETAIL.PLAN_SHOULD_BUY_NUM
    FROM
    PROJECT_PLAN_REQ_DETAIL
    INNER JOIN GOODS_INFO ON GOODS_INFO.GOODS_MAT_CODE = PROJECT_PLAN_REQ_DETAIL.PLAN_MAT_CODE
    AND GOODS_INFO.GOODS_MAT_CODE = PROJECT_PLAN_REQ_DETAIL.PLAN_MAT_CODE
    WHERE
    PROJECT_PLAN_REQ_DETAIL.PLAN_PURCHASE_ID = #{planPurchaseId}
    AND
    GOODS_INFO.GOODS_DBID IN
    <foreach collection="goodsDbIdList" item="item" index="index" close="(" open=")" separator=",">
        #{item}
    </foreach>

SQL按条件批量查询