mybatis中数组空值查询条件

原：<if test="payOrdVo.bkRtRmkArr != null and payOrdVo.bkRtRmkArr != ' ' ">

and 
<foreach item="item" index="index" collection="payOrdVo.bkRtRmkArr"
open="(" separator=" or " close=")">
 p. BK_RT_RMK like '%'||#{item}||'%'
 </foreach>
</if> 

传过来的可能是一个数组payOrdVo.bkRtRmkArr[] ，有值为payOrdVo.bkRtRmkArr[0] =" ",条件仍然符合

现：<if test="payOrdVo.bkRtRmkArr != null and payOrdVo.bkRtRmkArr != '' and payOrdVo.bkRtRmkArr[0] !=' '  " >

and 
<foreach item="item" index="index" collection="payOrdVo.bkRtRmkArr"
open="(" separator=" or " close=")">
p. BK_RT_RMK like '%'||#{item}||'%'
</foreach>
</if>