mybatis批量插入，更新，删除

MySQL中，insert后面带上 on duplicate key update 子句，数据库中存在记录时，执行这个语句会更新，而不存在这条记录时，就会插入。
insert into tablename(field1,field2,field3,......) values(value1,value2,value3,....) on duplicate key update field1=values(value1),field2=values(value2),field3=values(value3),......;
insert into `person_device`(`person_id`,`device_id`,`type`)
values
<foreach collection="list" separator="," item="item">
(#{item.personId}, #{item.deviceId}, #{item.type})
</foreach>
on duplicate key update `type`=values(`type`)

//重复主键不插入
INSERT IGNORE INTO 表示，检查主键（PrimaryKey）可能是联合主键，如果数据库中已经存在相同的记录，则忽略当前新数据插入；
<insert id="batchInsertPersonDevice">
insert ignore into `person_device`(`person_id`,`device_id`,`type`)
values
<foreach collection="list" separator="," item="item">
(#{item.personId}, #{item.deviceId},0)
</foreach>
</insert>

输出
==> Preparing: insert ignore into person_office(person_id,office_id) values (?,?)
==> Parameters: 2(Integer), 10000(String)
<== Updates: 0

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<insert id="batchInserOrUpdate">
  insert into fnd_dept(
                       dept_code,
                       dept_name,
                       parent_dept_code,
                       type,
                       dept_type,
                       status,
                       order_num,
                       memo,
                       dept_path,
                       dept_name_path,
                       creation_date,
                       last_update_date,
                       created_by,
                       last_updated_by)
    values
    <foreach collection="list" separator="," item="item">
        (
         #{item.deptCode},
         #{item.deptName},
         #{item.parentDeptCode},
         #{item.type},
         #{item.deptType},
         #{item.status},
         #{item.orderNum},
         #{item.memo},
         #{item.deptPath},
         #{item.deptNamePath},
         SYSDATE(),
         SYSDATE(),
        'admin',
        'admin'
        )
    </foreach>
    on duplicate key
        update  dept_name=values(dept_name),
                parent_dept_code=values(parent_dept_code),
                type=values(type),
                dept_type=values(dept_type),
                status=values(status),
                order_num=values(order_num),
                memo=values(memo),
                dept_path=values(dept_path),
                dept_name_path=values(dept_name_path),
                last_updated_by="admin",
                last_update_date=SYSDATE()

</insert>

//批量删除（or条件）
<delete id="issueFeginDeleteUser">
DELETE FROM person_device
WHERE
<foreach collection="list" separator="or" item="item">
(person_id=#{item.personId} AND device_id=#{item.deviceId})
</foreach>
</delete>

输出
==> Preparing: DELETE FROM person_device WHERE (person_id=? AND device_id=?) or (person_id=? AND device_id=?) or (person_id=? AND device_id=?)
==> Parameters: 3(Integer), CH3U212760001(String), 100(Integer), CH3U212760001(String), 12(Integer), CH3U212760001(String)
<== Updates: 0

//批量updte (ignore可以去掉)
<update id="batchUpdate">
<foreach collection="list" item="item" separator=";">
update ignore person_device
<set>
device_id=#{item.deviceId}
</set>
<where>
person_id=#{item.personId}
</where>
</foreach>
</update>

输出
==> Preparing: update ignore person_device SET device_id=? WHERE person_id=?
==> Parameters: CH3U212760002(String), 2(Integer)
<== Updates: 0

mybatis批量插入，更新，删除

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