mybatis,批量新增、修改,删除

转载自:http://blog.csdn.net/sanyuesan0000/article/details/19998727

最近需要用到Mybatis批量新增oracle数据库,刚开始在网上找到的方法是都是更新mySQL的,试了一下发现不适合Oracle,后来发现正确的oracle批量新增的sql是:

<insert id="insertAttractionsBatch" parameterType="java.util.List">
insert into ATTRACTIONS (

ID, NAME, LONGITUDE, LATITUDE,  UPDATE_TIME

)

  <foreach collection="list" item="item" index="index" separator="union all" > 
      (select  
#{item.id,jdbcType=VARCHAR}, 
#{item.name,jdbcType=VARCHAR}, 
#{item.longitude,jdbcType=DECIMAL}, #{item.updateTime,jdbcType=TIMESTAMP}

       from dual)

    </foreach>

</insert>

需要重点注意的是sql中没有values,和<foreach>标签中的(selece ..... from dual),MySql中的sql是这样的:

新增:

<insert id="insertAttractionsBatch" parameterType="java.util.List">
insert into ATTRACTIONS (

ID, NAME, LONGITUDE, LATITUDE,  UPDATE_TIME

)  

    <foreach collection="list" item="item" index="index" separator="union all" >

#{item.id,jdbcType=VARCHAR}, 
#{item.name,jdbcType=VARCHAR}, 
#{item.longitude,jdbcType=DECIMAL}, #{item.updateTime,jdbcType=TIMESTAMP}

    </foreach>

</insert>

oracle更新不能按普通的方式,需要这样:

<update id="updateAttractionsBatch" parameterType="java.util.List">
    begin  
        <foreach collection="list" item="item" index="index" separator=";" >
            update ATTRACTIONS
            <set>
            <if test="item.id!=null and item.id!=''">
                id = #{item.id},
            </if>

            <if test="item.head!=null and item.head!=''">
                HEAD = #{item.head},
            </if>

            </set>
            where id = #{item.id}
            </foreach>
        ;end;
    </update>

删除就与MySql一样了如下:

<delete id="deleteAttractions" parameterType="java.util.List">

  delete from ATTRACTIONS

  <where>

  <foreach collection="list" index="index" item="item" open="(" separator="or" close=")">     

  id=#{item.id}

    </foreach>

  </where>

  </delete>


原文地址:https://www.cnblogs.com/zrui-xyu/p/5684917.html