mybatis获取主键id

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<insert id="insert" parameterType="com.pinyougou.pojo.TbSpecification" >

<selectKey resultType="java.lang.Long" order="AFTER" keyProperty="id">
SELECT LAST_INSERT_ID() AS id
</selectKey>

insert into tb_specification (id, spec_name)
values (#{id,jdbcType=BIGINT}, #{specName,jdbcType=VARCHAR})

</insert>