mybatis-plus  mapper中foreach循环操作代码详解(新增或修改)

<insert id="insertPack" parameterType="java.util.List">
  insert into t_ev_bu_pack
  (
   PACK_CODE,
   BIN,
   PACK_PROD_TIME,
   CREATED_DATE,
   CREATED_BY,
   BATTERY_CLASS,
   SUPPLIER_NAME,
   TERMINAL_USER
  )
  values
  <foreach collection="list" item="item" index="index" open="" close="" separator=",">
  (
   #{item.PACK_CODE},
   #{item.BIN}, 
   #{item.PACK_PROD_TIME},
   now(),
   #{item.CREATED_BY},
   #{item.BATTERY_CLASS},
   #{item.SUPPLIER_NAME},
   #{item.TERMINAL_USER}
  )
  </foreach>
 </insert>

 <update id="updatePack" parameterType="java.util.List">
  <foreach collection="list" item="item" index="index" open="" close="" separator=";">
   update t_ev_bu_pack
   <trim prefix="SET" suffixOverrides=","> 
    <!-- BIN = #{BIN}, -->
    <if test="item.TERMINAL_USER != null and item.TERMINAL_USER != ''">
     TERMINAL_USER = #{item.TERMINAL_USER},
    </if> 
    <if test="item.SUPPLIER_NAME != null and item.SUPPLIER_NAME != ''">
     SUPPLIER_NAME = #{item.SUPPLIER_NAME},
    </if> 
    <if test="item.PACK_PROD_TIME != null and item.PACK_PROD_TIME != ''">
     PACK_PROD_TIME = #{item.PACK_PROD_TIME},
    </if> 
    <if test="item.BATTERY_CLASS != null and item.BATTERY_CLASS != ''">
     BATTERY_CLASS = #{item.BATTERY_CLASS},
    </if> 
    LAST_UPDATED_TIME = now(),
    LAST_UPDATED_BY = #{item.LAST_UPDATED_BY}
   </trim>
   where PACK_CODE = #{item.PACK_CODE}
  </foreach>
 </update>