优化代码 PlanOrderPushResponseVO planOrderPushResponseVO = JSON.parseObject(postResult, PlanOrderPushResponseVO.class); String flag = !StringUtils.isBlank(planOrderPushResponseVO.getFlag()) ? planOrderPushResponseVO.getFlag() : NumberConstant.CONSTANT_ONE.toString(); for (DesignPlanOrder planOrder : designPlanOrderList) { planOrder.setOrderPushResult(planOrderPushResponseVO.getMessage()); if (StringUtils.equals(NumberConstant.CONSTANT_ZERO.toString(),flag)){ planOrder.setOrderPushStatus(NumberConstant.CONSTANT_TWO); } else { planOrder.setOrderPushStatus(NumberConstant.CONSTANT_THREE); if (Objects.equals(NumberConstant.CONSTANT_ONE,source)){ delPlanOrderIdList.add(planOrder.getId()); } } planOrder.setOrderStatus(NumberConstant.CONSTANT_TWO); planOrder.setOrderProductionData(null); planOrder.setOrderQuotationData(null); planOrder.setOrderCadData(null); } designPlanOrderService.updateBatchById(designPlanOrderList); if (Objects.equals(NumberConstant.CONSTANT_ONE,source) && StringUtils.equals(NumberConstant.CONSTANT_ZERO.toString(),flag)){ //修改方案下单状态 designPlan.setPlanOrderStatus(NumberConstant.CONSTANT_TWO); designPlanService.updateById(designPlan); } //下单推送返回失败则废弃该订单 if (CollectionUtil.isNotEmpty(delPlanOrderIdList)){ designPlanOrderService.removeByIds(delPlanOrderIdList); Integer orderCount = designPlanOrderService.getPlanOrderCountByPlanCode(designPlan.getPlanCode()); if (null == orderCount || Objects.equals(NumberConstant.CONSTANT_ZERO,orderCount)){ designPlan.setPlanOrderStatus(NumberConstant.CONSTANT_ONE); } }

可以对代码进行如下优化：

1. 可以将重复的常量提取出来，定义为常量，避免多次创建。

2. 可以使用`Objects.equals()`方法代替`StringUtils.equals()`方法，因为`Objects.equals()`方法可以比较任意两个对象是否相等，而`StringUtils.equals()`方法只能比较字符串是否相等。

3. 可以使用`StringUtils.equalsAny()`方法代替多个`StringUtils.equals()`方法，可以使代码更简洁。

4. 可以使用`CollectionUtils.isEmpty()`方法代替`CollectionUtil.isNotEmpty()`方法，因为`CollectionUtils`是`Apache Commons Collections`库的类，而`CollectionUtil`是`Hutool`库的类，使用`CollectionUtils`更加常见。

改进后的代码如下：

PlanOrderPushResponseVO planOrderPushResponseVO = JSON.parseObject(postResult, PlanOrderPushResponseVO.class);
String flag = StringUtils.isNotBlank(planOrderPushResponseVO.getFlag()) ? planOrderPushResponseVO.getFlag() : NumberConstant.CONSTANT_ONE.toString();
for (DesignPlanOrder planOrder : designPlanOrderList) {
    planOrder.setOrderPushResult(planOrderPushResponseVO.getMessage());
    if (StringUtils.equalsAny(flag, NumberConstant.CONSTANT_ZERO.toString())) {
        planOrder.setOrderPushStatus(NumberConstant.CONSTANT_TWO);
    } else {
        planOrder.setOrderPushStatus(NumberConstant.CONSTANT_THREE);
        if (Objects.equals(NumberConstant.CONSTANT_ONE, source)) {
            delPlanOrderIdList.add(planOrder.getId());
        }
    }
    planOrder.setOrderStatus(NumberConstant.CONSTANT_TWO);
    planOrder.setOrderProductionData(null);
    planOrder.setOrderQuotationData(null);
    planOrder.setOrderCadData(null);
}
designPlanOrderService.updateBatchById(designPlanOrderList);
if (Objects.equals(NumberConstant.CONSTANT_ONE, source) && StringUtils.equalsAny(flag, NumberConstant.CONSTANT_ZERO.toString())) {
    //修改方案下单状态
    designPlan.setPlanOrderStatus(NumberConstant.CONSTANT_TWO);
    designPlanService.updateById(designPlan);
}
//下单推送返回失败则废弃该订单
if (CollectionUtils.isNotEmpty(delPlanOrderIdList)) {
    designPlanOrderService.removeByIds(delPlanOrderIdList);
    Integer orderCount = designPlanOrderService.getPlanOrderCountByPlanCode(designPlan.getPlanCode());
    if (Objects.equals(NumberConstant.CONSTANT_ZERO, orderCount)) {
        designPlan.setPlanOrderStatus(NumberConstant.CONSTANT_ONE);
    }
}

注意：原代码中`source`变量未定义，请根据实际情况自行定义。