mybatis 批量更新

<update id="batchupdateByPrimaryKey" parameterType="java.util.List" >

update tss_stockin_detail

<trim prefix="set" suffixOverrides="," >

<trim prefix="stockin_id =case" suffix="end, ">

<foreach collection="list" item="i" index="index">

<if test="i.stockinId!=null">

when stockin_detail_id=#{i.stockinDetailId} then #{i.stockinId}

</if>

</foreach>

</trim>

<trim prefix="device_model_id =case" suffix="end," >

<foreach collection="list" item="i" index="index">

<if test="i.deviceModelId!=null">

when stockin_detail_id=#{i.stockinDetailId} then #{i.deviceModelId}

</if>

</foreach>

</trim>

<trim prefix="stock_in_count =case" suffix="end," >

<foreach collection="list" item="i" index="index">

<if test="i.stockInCount!=null">

when stockin_detail_id=#{i.stockinDetailId} then #{i.stockInCount}

</if>

</foreach>

</trim>

<trim prefix="return_count =case" suffix="end," >

<foreach collection="list" item="i" index="index">

<if test="i.returnCount!=null">

when stockin_detail_id=#{i.stockinDetailId} then #{i.returnCount}

</if>

</foreach>

</trim>

<trim prefix="return_stockout_id =case" suffix="end," >

<foreach collection="list" item="i" index="index">

<if test="i.returnStockOutId!=null">

when stockin_detail_id=#{i.stockinDetailId} then #{i.returnStockOutId}

</if>

</foreach>

</trim>

</trim>

where

<foreach collection="list" separator="or" item="i" index="index" >

stockin_detail_id=#{i.stockinDetailId}

</foreach>

</update>