mybatis设置添加新对象数据的时候id使用uuid类型自动写入数据库

在mapper.xml文件中的insert中增加以下标红的代码 实现id采用自增方式写入数据库，并且写入一个uuid字符

<insert id="insert" parameterType="ssm.item.admin.bean.Depart" useGeneratedKeys="true" keyProperty="departId">
      <selectKey keyProperty="departId" resultType="java.lang.String" order="BEFORE"> select replace(uuid(),'-','') from dual </selectKey>
    insert into depart (depart_id, depart_name, depart_code
      )
    values (#{departId,jdbcType=VARCHAR}, #{departName,jdbcType=VARCHAR}, #{departCode,jdbcType=VARCHAR}
      )
  </insert>
  <insert id="insertSelective" parameterType="ssm.item.admin.bean.Depart" useGeneratedKeys="true" keyProperty="departId">
      <selectKey keyProperty="departId" resultType="java.lang.String" order="BEFORE"> select replace(uuid(),'-','') from dual </selectKey>
    insert into depart
    <trim prefix="(" suffix=")" suffixOverrides=",">
      <if test="departId != null">
        depart_id,
      </if>
      <if test="departName != null">
        depart_name,
      </if>
      <if test="departCode != null">
        depart_code,
      </if>
    </trim>
    <trim prefix="values (" suffix=")" suffixOverrides=",">
      <if test="departId != null">
        #{departId,jdbcType=VARCHAR},
      </if>
      <if test="departName != null">
        #{departName,jdbcType=VARCHAR},
      </if>
      <if test="departCode != null">
        #{departCode,jdbcType=VARCHAR},
      </if>
    </trim>
  </insert>