1.用户预收总金额为null 则默认为0

src/main/resources/mapper/modules/ins/InsFeeOrderNewMapper.xml

@@ -811,10 +811,10 @@
     </select>
     <select id="findSumAmount" resultType="java.math.BigDecimal">
         select
-        sum((ifnull(a.jq_export_supervise_costs_premiums,0)+ifnull(a.sy_export_supervise_costs_premiums,0)+ifnull(a.no_export_supervise_costs_premiums,0))
+        ifnull(sum((ifnull(a.jq_export_supervise_costs_premiums,0)+ifnull(a.sy_export_supervise_costs_premiums,0)+ifnull(a.no_export_supervise_costs_premiums,0))
         +
         (ifnull(a.jq_export_other_costs_premiums,0)+ifnull(a.sy_export_other_costs_premiums,0)+ifnull(a.no_export_other_costs_premiums,0))
-        )
+        ),0)
          as "amount"
         from
         ins_fee_order_new a  left join ins_area_company iac  on  a.ins_order_no=iac.id