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如何在serviceImpl拋出異常

ive task lar gpo 引用 exc class not string

    private void checkRelationTaskList(List<DeliveryTaskDO> taskList) {
        if (CollectionUtils.isNotEmpty(taskList)) {
            List<String> errorList = taskList.stream()
                .map(deliveryTaskDO -> String.format("%s(%s)", deliveryTaskDO.getTaskName(), deliveryTaskDO.getId()))
                .collect(Collectors.toList());
            String errorMessage 
= String.format("投放任務有引用,無法刪除:%s", Joiner.on(", ").join(errorList)); throw new IllegalArgumentException(errorMessage); } }

如何在serviceImpl拋出異常