mybatis批量插入和批量更新

批量插入數據使用的sql語句是：

insert into table (aa,bb,cc) values(xx,xx,xx),(oo,oo,oo)

mybatis中mapper.xml的代碼以下：

　　<!-- 批量插入數據 -->
    <insert id="insertBatch" parameterType="java.util.List"
        useGeneratedKeys="true">
        <selectKey resultType="long" keyProperty="id" order="AFTER">
            SELECT
            LAST_INSERT_ID()
        </selectKey>
        insert into wd_solr
        (fayu_id, tablename,
        name,logo,description,section_no,look_count,favorite_count,create_uid,create_time,update_time,timestamp)
        values
        <foreach collection="list" item="wdSolr" index="index"
            separator=",">
            (
            #{wdSolr.fayuId},#{wdSolr.tablename},#{wdSolr.name},#{wdSolr.logo},
            #{wdSolr.description},#{wdSolr.sectionNo},#{wdSolr.lookCount},#{wdSolr.favoriteCount},
            #{wdSolr.createUid},#{wdSolr.createTime},#{wdSolr.updateTime},#{wdSolr.timestamp}
            )
        </foreach>
    </insert>

 

批量更新數據使用的sql語句是：

UPDATE table
    SET aa = CASE id
        WHEN 1 THEN 'oo'
        WHEN 2 THEN 'pp'
        WHEN 3 THEN 'qq'
    END
　 ,SET bb = CASE id
        WHEN 1 THEN 'xx'
        WHEN 2 THEN 'yy'
        WHEN 3 THEN 'zz'
    END
WHERE id IN (1,2,3)

上面這一條mysql語句能夠更新多條記錄，mybatis中mapper.xml的代碼以下：

　　<!-- 批量更新數據 -->
    <update id="updateBatch">
        update wd_solr set
        name =
        <foreach collection="list" item="wdSolr" index="index"
            separator=" " open="case id" close="end">
            when #{wdSolr.id} then
            #{wdSolr.name}
        </foreach>
        ,logo =
        <foreach collection="list" item="wdSolr" index="index"
            separator=" " open="case id" close="end">
            when #{wdSolr.id} then
            #{wdSolr.logo}
        </foreach>        
        ,timestamp =
        <foreach collection="list" item="wdSolr" index="index"
            separator=" " open="case id" close="end">
            when #{wdSolr.id} then #{wdSolr.timestamp}
        </foreach>
        where id in
        <foreach collection="list" item="wdSolr" index="index" 
            separator="," open="(" close=")">
            #{wdSolr.id}
        </foreach>
    </update>