mybatis determination time field problems java.lang.IllegalArgumentException: invalid comparison: cn.hutool.core.date.DateTime and java.lang.String

Today, listen to team members said:

When the determination time mybatis version 3.30 and above

<if test="date_time != null and date_time != '' ">
    date_time,
</if>

java.lang.IllegalArgumentException: invalid comparison: cn.hutool.core.date.DateTime and java.lang.String

Removed and date_time! = '' Correct operation can be achieved

<if test="date_time != null >
    date_time,
</if>