mysql自增主键返回

<insert id="saveUser" parameterType="cn.mybatis.pojo.User">

   

   

   

   

   

    <selectKey keyColumn="id" keyProperty="id" order="AFTER"

       resultType="int">

       SELECT LAST_INSERT_ID()

    selectKey>

    INSERT INTO `user`

    (username,birthday,sex,address) VALUES

    (#{username},#{birthday},#{sex},#{address})

insert>