在mybatis中设置uuid

<insert id="insert" parameterType="dept">
        <selectKey keyProperty="id" resultType="String" order="BEFORE">
            select replace(uuid(),'-','') from dual
        </selectKey>
        insert into 
        t_dept(id,dept_name,address,create_time)
        values(#{id},#{deptName},#{address},#{createTime})
</insert>