刚遇到同样问题，不想用redis缓存机制，使用map的key值唯一性，解决方法有待验证 使用全局变量，一个订单号只能用一次，用完后就不怕了。大佬们，看看这样会有其他问题吗？ //通知结果高并发情况下拦截.全局变量 private Map repeatRequstMap = new ConcurrentHashMap<>(); public String xxx(String orderNo ){ if (repeatRequstMap.get(orderNo) == null) { repeatRequstMap.put(orderNo, orderNo); returnMsg = receiveBaseService.syncFinancial(financeUnifiedOrder); if (returnMsg != null) { logger.error("同步财务接口失败-{}-{}", orderNo, returnMsg); repeatRequstMap.remove(orderNo); return returnMsg; } else { if (repeatRequstMap.size() >= 60) { repeatRequstMap = new ConcurrentHashMap<>(); } } //修改同步系统状态 FinanceUnifiedOrder sync = new FinanceUnifiedOrder(); sync.setId(financeUnifiedOrder.getId()); sync.setSyncStatus("1"); financeUnifiedOrderMapper.updateByPrimaryKeySelective(sync); } return null; }