解决mybatis update并非所有字段需要更新问题

<update id="updateUser" parameterType="com.test.entity.User">
        update BS_USER
            <trim prefix="set" suffixOverrides=",">
                <if test="ACCOUNT != null">ACCOUNT=#{ACCOUNT},</if>
                <if test="NAME != null">NAME=#{NAME},</if>
                <if test="PROV != null">PROV=#{PROV},</if>
                <if test="FaiLURE_TIME != null">FAILURE_TIME=#{FAILURE_TIME},</if>
            </trim>
        where USERID=#{USERID}
    </update>

	<update id="deleteAll"  parameterType="java.util.List" >  
	   		 update cw_base_resident_house_ref a set state = 0
	        	where 1=1 and a.ID in
	        	<foreach item="item" collection="list" separator="," open="(" close=")" index="">
      				#{item.refId}
   				 </foreach>
	</update>