防止高并发的安全接口设计

基于缓存机制：

@RequestMapping("/transferOut/success")
    public @ResponseBody Map outResult(HttpServletRequest request, HttpServletResponse response,
            @RequestParam("amount") String amount, @RequestParam("bankcardno") String bankcardno,
            @RequestParam("aesTranPwd") String aesTranPwd) throws Exception {
        return transferout(request, amount, bankcardno, aesTranPwd);
    }

private synchronized Map transferout(HttpServletRequest request, String amount, String bankcardno,
            String aesTranPwd) throws Exception {
        MemcachedCacheManager memcachedCacheManager = new MemcachedCacheManager();
        MemcachedClient mc = memcachedCacheManager.getMemcachedClient();
        if (mc.add("superbankTransferLock", 5, "a")) {// 添加时长2s的锁

                   //处理业务逻辑   ，处理完成之后将superbankTransferLock删除，处理下一个请求

                  map.put("status", stat);
                  map.put("respmsg", respmsg);
                  mc.delete("superbankTransferLock");
                   return map;

          }else {
            Thread.sleep(500);
            return transferout(request, amount, bankcardno, aesTranPwd);
        }