Mybatis添加之后返回一个id

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Mybatis添加之后返回一个id有两种方法，如下：

A.直接写在insert标签里

<insert id="insertRadar" parameterType="com.hhigh.business.domain.Radar" useGeneratedKeys="true" keyProperty="id">
	insert into t_radar (
		<include refid="radarAttributes" />
	) values (
		#{id},#{file_name},#{format},#{file_size},#{file_url},#{station_name},#{province},#{city},
		#{cnty},#{town},#{datetime},#{station_id_c},#{year},#{mon},#{day},#{hour},#{min},#{second},
		#{rada_model},#{scanning_mode},#{filename_orig}
	)
</insert>

B.写在插入语句下面

<insert id="insertRadar" parameterType="com.hhigh.business.domain.Radar">
	insert into t_radar (
		<include refid="radarAttributes" />
 	) values (
		#{id},#{file_name},#{format},#{file_size},#{file_url},#{station_name},#{province},#{city},
		#{cnty},#{town},#{datetime},#{station_id_c},#{year},#{mon},#{day},#{hour},#{min},#{second},
		#{rada_model},#{scanning_mode},#{filename_orig}
	)
	<selectKey resultType="java.lang.Integer" keyProperty="id" order="AFTER" >
		select @@identity as id;
	</selectKey>
</insert>