通过抛出运行异常：throw new RuntimeException("请输入查询条件！");

BranchWarehouseServiceImpl.java

    // 查询试剂交易（入库/出库）记录
    @Override
    public List<BranchWarehouseTransactions> queryForReagent(BranchWarehouseTransactionsQueryDTO queryDTO) {
        if ((queryDTO.getTransactionTime() == null || queryDTO.getTransactionTime().isEmpty()) &&
                queryDTO.getTransactionType() == null &&
                (queryDTO.getMaterialName() == null || queryDTO.getMaterialName().isEmpty())) {
            throw new RuntimeException("请输入查询条件！");
        }
        return branchWarehouseMapper.selectForReagent(queryDTO);
    }

 前端应用效果：