mybatis+oracle 插入一条数据返回主键

插入数据后返回主键id

<insert id="insert" parameterType="com.neusoft.travel.dao.pojopublic.EmailFeedbackEntity" >

　　<selectKey resultType="java.lang.Long" keyProperty="id" order="BEFORE">

　　 select email_sequence.nextval from dual

　　</selectKey>

       insert into fk.email_feedback (mail,employee_code,state)

　　values (#{mail,jdbcType=VARCHAR}, #{employee_code,jdbcType=VARCHAR}, #{state,jdbcType=INTEGER})

</insert>