mybatis 默认插入当前时间

<insert id="importSickTree" parameterType="list" >
    insert into tb_sick_tree (treeCode,projectID,
    lat, lon, distCode, distName,
    identifyTime,processed,year)
    VALUES
    <foreach collection="list" item="sickTree" separator=",">
        ( #{sickTree.treecode,jdbcType=VARCHAR},#{sickTree.projectid,jdbcType=INTEGER},
        #{sickTree.lat,jdbcType=DOUBLE}, #{sickTree.lon,jdbcType=DOUBLE},
        #{sickTree.distcode,jdbcType=VARCHAR}, #{sickTree.distname,jdbcType=VARCHAR},
        #{sickTree.identifytime,jdbcType=TIMESTAMP}, #{sickTree.processed,jdbcType=INTEGER},SUBSTR(NOW(),1,4) )
    </foreach>
</insert>