mybatis传入list判断是否是空

代码语言：javascript复制

<if test="activityType != null and activityType.size() > 0" >
  and a.TypeId in
  <foreach collection="activityType" item="activityType" index="index" open="(" close=")" separator=",">
  #{activityType}
  </foreach>
</if>

mybatis list

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