技術標籤：常見錯誤點解決提示javamysql

1.修改mysql中的索引

即新增一個唯一索引(注意：此處的索引需要以出現頻率最高的列作為唯一索引)

2.修改mapper.xml檔案中的sql語句

在批量插入的時候 如果有重複的索引會自動更新

    <insert id="batchAddProductInfos" parameterType="java.util.List">
       insert into product (prodId,prodSort,prodName,prodImage,ProdReleaseTime,
 
prodStatus,prodNvipAllPrice,prodVipAllPrice,proIntegral,proGrowthvalue,proStoreName,prodBrandId,isOnSheleves,prodEveryMaxStorage,prodMoral,isUseCouple,isUseIntegral)
       values
       <foreach collection="plist" item="product" index="index" separator=","
 
>
           (0,#{product.ProdSort},#{product.ProdName},#{product.ProdImage},#{product.ProdReleaseTime},#{product.ProdStatus},#{product.ProdNvipAllPrice},#{product.ProdVipAllPrice},#{product.ProdIntegral},#{product.ProdGrowthvalue},#{product.ProStoreName},#{product.storeBrandId},#{product.IsOnSheleves}
 
,#{product.prodEveryMaxStorage},#{product.prodMoral},#{product.IsUseCouple},#{product.IsUseIntegral})
       </foreach>
        <!--where not exists (select * from product where prodName = #{product.ProdName})-->
        on duplicate key update
         prodSort = values(prodSort),
         prodName = values(prodName),
         prodImage = values(prodImage),
         ProdReleaseTime = values(ProdReleaseTime ),
         prodStatus = values(prodStatus),
         prodNvipAllPrice = values(prodNvipAllPrice),
         prodVipAllPrice = values(prodVipAllPrice),
         proIntegral = values(proIntegral),
         proGrowthvalue = values(proGrowthvalue),
         proStoreName = values(proStoreName),
         prodBrandId = values(prodBrandId),
         isOnSheleves = values(isOnSheleves),
         prodEveryMaxStorage = values(prodEveryMaxStorage),
         prodMoral = values(prodMoral),
         isUseCouple = values(isUseCouple),
         isUseIntegral = values(isUseIntegral)
    </insert>