{"id":86808,"date":"2026-07-29T10:00:35","date_gmt":"2026-07-29T02:00:35","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/86808.html"},"modified":"2026-07-29T10:00:35","modified_gmt":"2026-07-29T02:00:35","slug":"%e4%b8%80%e4%b8%aa%e7%9f%ad%e9%93%be%e6%8e%a5%e5%88%9b%e5%bb%ba%e8%af%b7%e6%b1%82%ef%bc%8c%e8%83%8c%e5%90%8e%e5%88%b0%e5%ba%95%e7%bb%8f%e5%8e%86%e4%ba%86%e4%bb%80%e4%b9%88","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/86808.html","title":{"rendered":"\u4e00\u4e2a\u77ed\u94fe\u63a5\u521b\u5efa\u8bf7\u6c42\uff0c\u80cc\u540e\u5230\u5e95\u7ecf\u5386\u4e86\u4ec0\u4e48"},"content":{"rendered":"

\u5148\u8bf4\u8bf4\u77ed\u94fe\u63a5\u8fd9\u56de\u4e8b<\/h3>\n

\u4f60\u80af\u5b9a\u89c1\u8fc7\u8fd9\u79cd\u4e1c\u897f：https:\/\/b23.tv\/aB3xY9，\u70b9\u8fdb\u53bb\u8df3\u5230\u7684\u662f\u4e00\u4e2a\u5f88\u957f\u7684 B \u7ad9\u89c6\u9891\u94fe\u63a5\u3002\u65e5\u5e38\u804a\u5929\u3001\u53d1\u5fae\u535a\u3001\u5370\u6d77\u62a5\u7684\u65f6\u5019，\u957f\u94fe\u63a5\u53c8\u4e11\u53c8\u5360\u5730\u65b9，\u9700\u8981\u6709\u4e00\u4e2a\u77ed\u7684\u4e1c\u897f\u6765\u66ff\u5b83\u3002<\/p>\n

\u4e4d\u4e00\u60f3，\u8fd9\u4e0d\u5c31\u662f\u4e2a\u6620\u5c04\u5417\u2014\u2014\u5b58\u4e00\u4e2a\u5bf9\u5e94\u5173\u7cfb，\u6709\u4eba\u8bbf\u95ee\u77ed\u94fe\u63a5\u7684\u65f6\u5019，\u67e5\u5230\u539f\u59cb\u94fe\u63a5，302 \u8df3\u8fc7\u53bb，\u5b8c\u4e8b\u3002<\/p>\n

\u6211\u4e00\u5f00\u59cb\u4e5f\u662f\u8fd9\u4e48\u60f3\u7684\u3002\u4f46\u771f\u7684\u52a8\u624b\u5199\u7684\u65f6\u5019，\u95ee\u9898\u4e00\u4e2a\u63a5\u4e00\u4e2a\u5192\u51fa\u6765：\u600e\u4e48\u4fdd\u8bc1\u77ed\u7801\u4e0d\u91cd\u590d？\u4e24\u4e2a\u4eba\u540c\u65f6\u7528\u540c\u4e00\u4e2a\u81ea\u5b9a\u4e49\u77ed\u7801\u600e\u4e48\u529e？\u6709\u4eba\u62ff\u811a\u672c\u5237\u521b\u5efa\u63a5\u53e3\u600e\u4e48\u9632？\u77ed\u7801\u88ab\u4eba\u904d\u5386\u600e\u4e48\u529e？\u7f13\u5b58\u7a7f\u900f\u4e86\u600e\u4e48\u529e？\u5927\u91cf\u8bf7\u6c42\u540c\u65f6\u8bbf\u95ee\u4e00\u4e2a\u4e0d\u5b58\u5728\u7684\u77ed\u94fe，\u4f1a\u4e0d\u4f1a\u76f4\u63a5\u628a\u6570\u636e\u5e93\u6253\u57ae？<\/p>\n

\u8fd9\u7bc7\u6587\u7ae0\u5c31\u4ece\u4e00\u6b21\u521b\u5efa\u8bf7\u6c42\u7684\u89d2\u5ea6，\u4ece\u5934\u5230\u5c3e\u628a\u5b83\u8d70\u8fc7\u7684\u8def\u62c6\u5f00\u6765\u770b\u3002\u9879\u76ee\u7528\u7684\u662f Spring Boot 3 + MyBatis-Plus + Redis + Redisson + MySQL \u8fd9\u5957\u6280\u672f\u6808\u3002<\/p>\n

\n

\u6574\u4e2a\u6d41\u7a0b\u957f\u4ec0\u4e48\u6837<\/h3>\n

\u5728\u5177\u4f53\u8bb2\u6bcf\u4e2a\u73af\u8282\u4e4b\u524d，\u5148\u7ed9\u4e00\u4e2a\u5168\u666f\u56fe\u3002\u5f53\u4e00\u4e2a\u5ba2\u6237\u7aef\u53d1\u9001 POST \/api\/short-link\/create，\u5e26\u4e0a {"originalUrl": "https:\/\/\u67d0\u4e2a\u5f88\u957f\u7684\u7f51\u5740.com"}，\u8bf7\u6c42\u4f1a\u4f9d\u6b21\u7a7f\u8fc7\u8fd9\u4e9b\u5c42：<\/p>\n

\u5ba2\u6237\u7aef
\n \u2502
\n \u25bc
\n\u9650\u6d41\u62e6\u622a\u5668（Redis Lua \u6ed1\u52a8\u7a97\u53e3，IP \u7ef4\u5ea6\u9650\u6d41）
\n \u2502
\n \u25bc
\nController \u5c42（\u63a5\u6536\u8bf7\u6c42 + \u89e6\u53d1\u53c2\u6570\u6821\u9a8c）
\n \u2502
\n \u25bc
\nService \u5c42（\u6838\u5fc3\u4e1a\u52a1\u7f16\u6392，11 \u4e2a\u6b65\u9aa4）
\n \u251c\u2500 SHA-256 \u54c8\u5e0c\u539f\u59cb URL
\n \u251c\u2500 Redisson \u5206\u5e03\u5f0f\u9501
\n \u251c\u2500 \u540c URL \u53bb\u91cd\u67e5\u8be2（\u81ea\u52a8\u6a21\u5f0f）
\n \u251c\u2500 \u5e03\u9686\u8fc7\u6ee4\u5668 + DB \u53cc\u91cd\u786e\u8ba4\u77ed\u7801\u552f\u4e00\u6027
\n \u251c\u2500 \u77ed\u7801\u751f\u6210\u5668\u751f\u6210 6 \u4f4d Base62 \u77ed\u7801
\n \u251c\u2500 DB INSERT
\n \u251c\u2500 \u5e03\u9686\u8fc7\u6ee4\u5668\u6ce8\u518c\u65b0\u77ed\u7801
\n \u251c\u2500 Redis \u7f13\u5b58\u56de\u586b（TTL \u968f\u673a\u504f\u79fb）
\n \u2514\u2500 \u91ca\u653e\u9501 + \u8fd4\u56de\u7ed3\u679c
\n \u2502
\n \u25bc
\n\u7edf\u4e00\u54cd\u5e94：{ code: 200, data: { shortUrl: "http:\/\/localhost:8080\/sl\/aB3xY9" } }<\/p>\n

\u770b\u8d77\u6765\u7ec4\u4ef6\u5f88\u591a，\u4f46\u6bcf\u4e2a\u90fd\u6709\u5b83\u5b58\u5728\u7684\u7406\u7531\u3002\u4e0b\u9762\u4e00\u4e2a\u4e00\u4e2a\u804a\u3002<\/p>\n

\n

\u7b2c\u4e00\u5173：\u9650\u6d41\u2014\u2014\u4e0d\u8ba9\u6076\u610f\u8bf7\u6c42\u6253\u8fdb\u6765<\/h3>\n

\u8bf7\u6c42\u5230\u8fbe\u670d\u52a1\u5668\u7684\u7b2c\u4e00\u4ef6\u4e8b，\u4e0d\u662f\u8fdb Controller，\u800c\u662f\u88ab\u4e00\u4e2a\u62e6\u622a\u5668\u62e6\u4f4f\u3002<\/p>\n

\u8fd9\u4e2a\u62e6\u622a\u5668\u53eb RateLimitInterceptor，\u6ce8\u518c\u5728 WebConfig \u91cc，\u62e6\u622a\u8def\u5f84\u662f \/api\/**\u3002\u6ce8\u610f\u5b83\u4e0d\u62e6\u622a \/sl\/**\u2014\u2014\u77ed\u94fe\u8df3\u8f6c\u662f\u7ed9\u7528\u6237\u7528\u7684，\u4e0d\u80fd\u56e0\u4e3a\u9650\u6d41\u628a\u6b63\u5e38\u8bbf\u95ee\u4e5f\u5361\u4e86\u3002<\/p>\n

\u5b83\u662f\u600e\u4e48\u77e5\u9053\u9650\u591a\u5c11\u7684<\/h4>\n

\u5728 Controller \u7684\u65b9\u6cd5\u4e0a\u6709\u4e00\u4e2a\u81ea\u5b9a\u4e49\u6ce8\u89e3：<\/p>\n

@RateLimit<\/span>(<\/span>window =<\/span> 60<\/span>,<\/span> maxCount =<\/span> 10<\/span>,<\/span> message =<\/span> "\u521b\u5efa\u8fc7\u4e8e\u9891\u7e41，\u8bf71\u5206\u949f\u540e\u518d\u8bd5"<\/span>)<\/span><\/p>\n

\u610f\u601d\u662f\u540c\u4e00\u4e2a IP，60 \u79d2\u5185\u6700\u591a\u8c03 10 \u6b21\u521b\u5efa\u63a5\u53e3\u3002<\/p>\n

\u5177\u4f53\u600e\u4e48\u9650\u7684<\/h4>\n

\u5b83\u7528\u7684\u662f Redis \u7684 ZSET（\u6709\u5e8f\u96c6\u5408）\u505a\u6ed1\u52a8\u7a97\u53e3\u3002<\/p>\n

\u6211\u7b2c\u4e00\u6b21\u770b\u5230\u8fd9\u4e2a\u65b9\u6848\u7684\u65f6\u5019，\u8111\u5b50\u91cc\u5192\u51fa\u6765\u7684\u95ee\u9898\u662f：\u4e0d\u80fd\u76f4\u63a5\u7528\u56fa\u5b9a\u7a97\u53e3\u5417？\u8bb0\u4e00\u4e2a\u8ba1\u6570\u5668，\u5230 60 \u79d2\u5c31\u91cd\u7f6e，\u8d85\u4e86\u5c31\u62d2\u7edd，\u903b\u8f91\u7b80\u5355\u5f97\u591a\u3002<\/p>\n

\u540e\u6765\u4ed4\u7ec6\u4e00\u60f3\u624d\u53d1\u73b0\u4e86\u56fa\u5b9a\u7a97\u53e3\u7684\u8fb9\u754c\u6f0f\u6d1e：\u5047\u8bbe\u9650\u5236\u662f 60 \u79d2 10 \u6b21，\u4e00\u4e2a\u4eba\u5728 59 \u79d2\u65f6\u5237\u4e86 10 \u4e2a\u8bf7\u6c42，\u4e0b\u4e00\u79d2（\u4e0b\u4e00\u5206\u949f\u7684 0 \u79d2）\u53c8\u5237\u4e86 10 \u4e2a\u3002\u4ece\u56fa\u5b9a\u7a97\u53e3\u770b，\u6bcf\u4e00\u5206\u949f\u7684\u8bf7\u6c42\u90fd\u6ca1\u8d85\u9650，\u4f46\u5b9e\u9645\u4e0a\u4ed6\u5728\u4e24\u79d2\u5185\u5237\u4e86 20 \u4e2a\u8bf7\u6c42\u3002\u6ed1\u52a8\u7a97\u53e3\u4e0d\u5b58\u5728\u8fd9\u4e2a\u95ee\u9898，\u5b83\u770b\u7684\u59cb\u7ec8\u662f\u300c\u8fc7\u53bb 60 \u79d2\u5185\u300d\u7684\u8bf7\u6c42\u6570，\u4e0d\u6309\u81ea\u7136\u5206\u949f\u5207\u5206\u3002<\/p>\n

\u5177\u4f53\u7528 ZSET \u5b9e\u73b0\u6ed1\u52a8\u7a97\u53e3，\u5927\u6982\u7684\u601d\u8def\u662f：<\/p>\n

  • \u6bcf\u4e2a\u8bf7\u6c42\u5230\u6765\u65f6，\u7528\u5f53\u524d\u65f6\u95f4\u6233\u4f5c\u4e3a score \u548c member，\u585e\u8fdb ZSET<\/li>\n
  • \u5220\u6389 ZSET \u91cc\u6240\u6709 60 \u79d2\u4ee5\u524d\u7684\u65e7\u8bb0\u5f55<\/li>\n
  • \u6570\u4e00\u4e0b ZSET \u91cc\u8fd8\u5269\u591a\u5c11\u6761<\/li>\n
  • \u8d85\u8fc7 10 \u6761\u5c31\u62d2\u7edd，\u4e0d\u8d85\u8fc7\u5c31\u653e\u884c<\/li>\n

    \u4f46\u8fd9\u56db\u6b65\u5982\u679c\u5206\u5f00\u6267\u884c，\u4f1a\u6709\u5e76\u53d1\u95ee\u9898\u3002\u60f3\u8c61\u4e24\u4e2a\u8bf7\u6c42\u51e0\u4e4e\u540c\u65f6\u5230：\u7ebf\u7a0b A \u5220\u5b8c\u65e7\u6570\u636e\u3001\u6570\u4e86\u662f 9 \u6761\u3001\u51c6\u5907\u653e\u884c；\u7ebf\u7a0b B \u4e5f\u5220\u5b8c\u65e7\u6570\u636e\u3001\u4e5f\u6570\u4e86\u662f 9 \u6761\u3002\u4e24\u4e2a\u90fd\u89c9\u5f97\u81ea\u5df1\u6ca1\u8d85\u9650，\u7ed3\u679c\u5b9e\u9645\u4e0a\u662f 10+1，\u9650\u6d41\u5931\u6548\u4e86\u3002<\/p>\n

    \u6240\u4ee5\u8fd9\u91cc\u7528\u4e86\u4e00\u4e2a\u5f88\u7ecf\u5178\u7684\u505a\u6cd5\u2014\u2014\u628a\u6574\u4e2a\u903b\u8f91\u5199\u8fdb\u4e00\u6bb5 Lua \u811a\u672c，\u4e00\u6b21\u6027\u53d1\u7ed9 Redis \u6267\u884c\u3002Redis \u662f\u5355\u7ebf\u7a0b\u7684，\u811a\u672c\u6267\u884c\u671f\u95f4\u4e0d\u4f1a\u6709\u5176\u4ed6\u547d\u4ee4\u63d2\u8fdb\u6765，\u5929\u7136\u4fdd\u8bc1\u4e86\u539f\u5b50\u6027\u3002<\/p>\n

    redis.<\/span>call<\/span>(<\/span>'ZREMRANGEBYSCORE'<\/span>,<\/span> KEYS[<\/span>1<\/span>]<\/span>,<\/span> 0<\/span>,<\/span> ARGV[<\/span>1<\/span>]<\/span>)<\/span> — \u5220\u6389\u7a97\u53e3\u5916\u7684<\/span>
    \nlocal<\/span> count =<\/span> redis.<\/span>call<\/span>(<\/span>'ZCARD'<\/span>,<\/span> KEYS[<\/span>1<\/span>]<\/span>)<\/span> — \u7edf\u8ba1\u5f53\u524d\u7a97\u53e3\u5185\u8bf7\u6c42\u6570<\/span>
    \nif<\/span> count >=<\/span> tonumber<\/span>(<\/span>ARGV[<\/span>3<\/span>]<\/span>)<\/span> then<\/span>
    \n return<\/span> 1<\/span> — \u8d85\u9650，\u62d2\u7edd<\/span>
    \nend<\/span>
    \nredis.<\/span>call<\/span>(<\/span>'ZADD'<\/span>,<\/span> KEYS[<\/span>1<\/span>]<\/span>,<\/span> ARGV[<\/span>2<\/span>]<\/span>,<\/span> ARGV[<\/span>2<\/span>]<\/span>)<\/span> — \u8bb0\u5f55\u672c\u6b21\u8bf7\u6c42<\/span>
    \nredis.<\/span>call<\/span>(<\/span>'EXPIRE'<\/span>,<\/span> KEYS[<\/span>1<\/span>]<\/span>,<\/span> ARGV[<\/span>4<\/span>]<\/span>)<\/span> — \u8bbe\u8fc7\u671f，\u9632\u6b62\u5185\u5b58\u6cc4\u6f0f<\/span>
    \nreturn<\/span> 0<\/span> — \u653e\u884c<\/span><\/p>\n

    \u6211\u7b2c\u4e00\u6b21\u770b\u5230\u8fd9\u4e2a\u7684\u65f6\u5019，\u89c9\u5f97"\u5c31\u56db\u884c Redis \u547d\u4ee4\u800c\u5df2，\u81f3\u4e8e\u5199 Lua \u5417"\u3002\u540e\u6765\u81ea\u5df1\u6a21\u62df\u4e86\u4e24\u4e2a\u5e76\u53d1\u8bf7\u6c42，\u624d\u660e\u767d\u5206\u5f00\u6267\u884c\u7684\u7ade\u6001\u7a97\u53e3\u6709\u591a\u81f4\u547d\u3002\u8fd9\u662f\u65b0\u624b\u5f88\u5bb9\u6613\u5ffd\u7565\u7684\u7ec6\u8282\u2014\u2014\u5206\u5e03\u5f0f\u73af\u5883\u4e0b，\u591a\u4e2a\u64cd\u4f5c\u5408\u5728\u4e00\u8d77\u4e0d\u7b49\u4e8e\u539f\u5b50\u64cd\u4f5c\u3002<\/p>\n

    IP \u83b7\u53d6\u4e5f\u6709\u8bb2\u7a76<\/h4>\n

    \u9650\u6d41\u662f\u6309 IP \u6765\u7684，\u90a3 IP \u600e\u4e48\u62ff？\u4e0d\u662f\u7b80\u5355\u5730 request.getRemoteAddr() \u5c31\u884c\u3002\u5982\u679c\u670d\u52a1\u524d\u9762\u6709 Nginx \u6216\u8005 CDN，\u76f4\u63a5\u62ff RemoteAddr \u62ff\u5230\u7684\u53ef\u80fd\u662f\u4ee3\u7406\u670d\u52a1\u5668\u7684 IP，\u6240\u6709\u4eba\u7684\u8bf7\u6c42\u770b\u8d77\u6765\u90fd\u6765\u81ea\u540c\u4e00\u4e2a IP，\u9650\u6d41\u5c31\u5e9f\u4e86\u3002<\/p>\n

    \u5b9e\u9645\u4ee3\u7801\u91cc\u662f\u6309\u4f18\u5148\u7ea7\u53bb\u53d6\u7684：\u5148\u770b X-Forwarded-For \u5934（Nginx \u4ee3\u7406\u65f6\u4f1a\u8bbe），\u6ca1\u6709\u518d\u8bd5 X-Real-IP，\u6700\u540e\u624d\u7528 getRemoteAddr()\u3002\u800c\u4e14 X-Forwarded-For \u53ef\u80fd\u662f \u5ba2\u6237\u7aefIP, \u4ee3\u74061, \u4ee3\u74062 \u8fd9\u6837\u7684\u9017\u53f7\u5206\u9694\u5217\u8868，\u53d6\u7b2c\u4e00\u4e2a\u624d\u662f\u771f\u5b9e\u5ba2\u6237\u7aef\u3002<\/p>\n

    \n

    \u7b2c\u4e8c\u5173：\u53c2\u6570\u6821\u9a8c\u2014\u2014\u4e0d\u8ba9\u810f\u6570\u636e\u8fdb\u6765<\/h3>\n

    \u8fc7\u4e86\u9650\u6d41，\u8bf7\u6c42\u7ec8\u4e8e\u5230\u4e86 Controller\u3002\u4f46 Controller \u51e0\u4e4e\u6ca1\u5199\u4ec0\u4e48\u903b\u8f91：<\/p>\n

    @PostMapping<\/span>(<\/span>"\/api\/short-link\/create"<\/span>)<\/span>
    \n@RateLimit<\/span>(<\/span>window =<\/span> 60<\/span>,<\/span> maxCount =<\/span> 10<\/span>,<\/span> message =<\/span> "\u521b\u5efa\u8fc7\u4e8e\u9891\u7e41，\u8bf71\u5206\u949f\u540e\u518d\u8bd5"<\/span>)<\/span>
    \npublic<\/span> Result<\/span><<\/span>ShortLinkVO<\/span>><\/span><\/span> create<\/span>(<\/span>@Valid<\/span> @RequestBody<\/span> ShortLinkCreateDTO<\/span> dto)<\/span> {<\/span>
    \n ShortLinkVO<\/span> vo =<\/span> shortLinkService.<\/span>create<\/span>(<\/span>dto)<\/span>;<\/span>
    \n return<\/span> Result<\/span>.<\/span>success<\/span>(<\/span>vo)<\/span>;<\/span>
    \n}<\/span><\/p>\n

    \u5c31\u4e09\u884c\u3002\u5173\u952e\u7684 @Valid \u6ce8\u89e3\u89e6\u53d1\u4e86 Jakarta Bean Validation，\u6846\u67b6\u4f1a\u81ea\u52a8\u53bb\u68c0\u67e5 DTO \u91cc\u7684\u7ea6\u675f：<\/p>\n

    public<\/span> class<\/span> ShortLinkCreateDTO<\/span> {<\/span>
    \n @NotBlank<\/span>(<\/span>message =<\/span> "\u539f\u59cb\u94fe\u63a5\u4e0d\u80fd\u4e3a\u7a7a"<\/span>)<\/span>
    \n @URL<\/span>(<\/span>message =<\/span> "URL\u683c\u5f0f\u4e0d\u6b63\u786e"<\/span>)<\/span>
    \n private<\/span> String<\/span> originalUrl;<\/span><\/p>\n

    private<\/span> String<\/span> description;<\/span><\/p>\n

    private<\/span> Integer<\/span> expireDays;<\/span><\/p>\n

    @Pattern<\/span>(<\/span>regexp =<\/span> "^[A-Za-z0-9]([A-Za-z0-9-]{0,6}[A-Za-z0-9])?$"<\/span>,<\/span>
    \n message =<\/span> "\u81ea\u5b9a\u4e49\u77ed\u7801\u683c\u5f0f\u4e0d\u6b63\u786e"<\/span>)<\/span>
    \n private<\/span> String<\/span> customCode;<\/span>
    \n}<\/span><\/p>\n

    @NotBlank \u4fdd\u8bc1\u4e86 originalUrl \u4e0d\u80fd\u662f\u7a7a\u5b57\u7b26\u4e32，@URL \u4fdd\u8bc1\u5b83\u5f97\u662f\u4e2a\u5408\u6cd5\u7684 URL \u683c\u5f0f\u3002customCode \u7684\u6b63\u5219\u9650\u5236\u6bd4\u8f83\u7ec6：\u5fc5\u987b\u662f 2 \u5230 8 \u4f4d，\u53ea\u80fd\u5305\u542b\u5b57\u6bcd\u3001\u6570\u5b57\u548c\u4e2d\u95f4\u7684\u8fde\u5b57\u7b26，\u9996\u5c3e\u4e0d\u80fd\u662f\u8fde\u5b57\u7b26\u3002<\/p>\n

    \u6821\u9a8c\u5931\u8d25\u7684\u65f6\u5019，Spring \u4f1a\u81ea\u52a8\u629b\u51fa MethodArgumentNotValidException，\u7136\u540e\u88ab\u5168\u5c40\u5f02\u5e38\u5904\u7406\u5668\u63a5\u7ba1，\u8fd4\u56de\u4e00\u4e2a\u7edf\u4e00\u7684\u9519\u8bef\u683c\u5f0f\u7ed9\u524d\u7aef\u3002<\/p>\n

    \u8fd9\u91cc\u6709\u4e2a\u5c0f\u8bbe\u8ba1\u503c\u5f97\u63d0\u4e00\u4e0b：\u867d\u7136\u6821\u9a8c\u5931\u8d25\u4e86，HTTP \u72b6\u6001\u7801\u4f9d\u7136\u662f 200，\u771f\u6b63\u7684\u9519\u8bef\u4fe1\u606f\u5728\u54cd\u5e94\u4f53\u91cc\u7684\u4e1a\u52a1\u7801（401）\u91cc\u3002\u8fd9\u6837\u505a\u7684\u597d\u5904\u662f\u524d\u7aef\u4e0d\u9700\u8981\u533a\u5206 HTTP \u5c42\u9519\u8bef\u548c\u4e1a\u52a1\u5c42\u9519\u8bef，\u7edf\u4e00\u89e3\u6790 JSON \u91cc\u7684 code \u5b57\u6bb5\u5c31\u884c\u3002<\/p>\n

    \n

    \u7b2c\u4e09\u5173：\u6838\u5fc3\u4e1a\u52a1\u903b\u8f91\u2014\u201411 \u6b65\u7684\u7f16\u6392<\/h3>\n

    \u7ec8\u4e8e\u5230\u4e86\u6700\u6838\u5fc3\u7684 Service \u5c42\u3002ShortLinkServiceImpl.create() \u8fd9\u4e2a\u65b9\u6cd5\u5927\u6982 80 \u591a\u884c，\u662f\u6574\u4e2a\u521b\u5efa\u529f\u80fd\u7684\u6307\u6325\u5b98\u3002<\/p>\n

    \u7b2c 1 \u6b65：\u7ed9 URL \u7b97\u4e2a\u54c8\u5e0c<\/h4>\n

    String<\/span> urlHash =<\/span> DigestUtils<\/span>.<\/span>sha256Hex<\/span>(<\/span>dto.<\/span>getOriginalUrl<\/span>(<\/span>)<\/span>)<\/span>;<\/span><\/p>\n

    \u4e3a\u4ec0\u4e48\u8981\u5bf9\u539f\u59cb URL \u505a SHA-256？\u56e0\u4e3a URL \u6700\u957f\u53ef\u80fd\u6709 2048 \u4e2a\u5b57\u7b26，\u62ff\u5b83\u76f4\u63a5\u5728\u6570\u636e\u5e93\u91cc\u5efa\u7d22\u5f15\u6548\u7387\u5f88\u4f4e，\u800c\u4e14\u6709\u4e9b\u6570\u636e\u5e93\u5bf9\u7d22\u5f15\u957f\u5ea6\u6709\u9650\u5236\u3002\u7b97\u6210\u4e00\u4e2a\u56fa\u5b9a 64 \u4f4d\u7684\u5341\u516d\u8fdb\u5236\u5b57\u7b26\u4e32，\u5efa\u7d22\u5f15\u5c31\u5feb\u591a\u4e86\u3002<\/p>\n

    \u914d\u5408\u6570\u636e\u5e93\u91cc\u7684 idx_url_hash \u7d22\u5f15，\u540e\u7eed\u7684"\u540c\u4e00 URL \u53bb\u91cd"\u67e5\u8be2\u5c31\u80fd\u8d70\u7d22\u5f15，\u4e0d\u4f1a\u5168\u8868\u626b\u63cf\u3002<\/p>\n

    \u7b2c 2-3 \u6b65：\u52a0\u9501<\/h4>\n

    \u63a5\u4e0b\u6765\u662f\u5206\u5e03\u5f0f\u9501\u3002\u5148\u5224\u65ad\u662f\u4e0d\u662f\u81ea\u5b9a\u4e49\u77ed\u7801\u6a21\u5f0f：<\/p>\n

      \n
    • \u5982\u679c\u7528\u6237\u4f20\u4e86 customCode：\u9501\u7684 key \u662f shortlink:lock:code:{\u81ea\u5b9a\u4e49\u77ed\u7801}，\u4fdd\u62a4\u7684\u662f"\u8fd9\u4e2a\u77ed\u7801\u4e0d\u88ab\u522b\u4eba\u540c\u65f6\u5360\u7528"<\/li>\n
    • \u5982\u679c\u6ca1\u4f20（\u81ea\u52a8\u751f\u6210\u6a21\u5f0f）：\u9501\u7684 key \u662f shortlink:lock:{urlHash}，\u4fdd\u62a4\u7684\u662f"\u540c\u4e00\u4e2a URL \u4e0d\u88ab\u5e76\u53d1\u521b\u5efa\u51fa\u4e24\u4e2a\u4e0d\u540c\u7684\u77ed\u7801"<\/li>\n<\/ul>\n

      \u4e3a\u4ec0\u4e48\u81ea\u52a8\u6a21\u5f0f\u7528 urlHash \u800c\u4e0d\u7528 shortCode？\u56e0\u4e3a\u81ea\u52a8\u6a21\u5f0f\u8fd9\u4e2a\u65f6\u5019\u8fd8\u6ca1\u751f\u6210\u77ed\u7801，\u9501\u7684\u76ee\u7684\u662f\u4fdd\u62a4 URL \u5230\u77ed\u7801\u8fd9\u4e2a\u6620\u5c04\u7684\u552f\u4e00\u6027\u3002<\/p>\n

      \u9501\u7528\u7684\u662f Redisson \u7684 RLock：<\/p>\n

      RLock<\/span> lock =<\/span> redissonClient.<\/span>getLock<\/span>(<\/span>lockKey)<\/span>;<\/span>
      \nboolean<\/span> acquired =<\/span> lock.<\/span>tryLock<\/span>(<\/span>5<\/span>,<\/span> 10<\/span>,<\/span> TimeUnit<\/span>.<\/span>SECONDS<\/span>)<\/span>;<\/span><\/p>\n

      tryLock(5, 10) \u7684\u610f\u601d\u662f：\u6700\u591a\u7b49 5 \u79d2\u53bb\u62a2\u9501，\u62a2\u5230\u4e4b\u540e\u6700\u591a\u6301\u6709 10 \u79d2（\u9632\u6b62\u6b7b\u9501）\u3002\u5982\u679c 5 \u79d2\u8fd8\u6ca1\u62a2\u5230，\u8bf4\u660e\u5f53\u524d\u5e76\u53d1\u592a\u9ad8，\u76f4\u63a5\u8fd4\u56de"\u7cfb\u7edf\u7e41\u5fd9，\u8bf7\u7a0d\u540e\u91cd\u8bd5"\u3002<\/p>\n

      \u6211\u4e00\u5f00\u59cb\u4e0d\u7406\u89e3\u4e3a\u4ec0\u4e48\u81ea\u52a8\u751f\u6210\u4e5f\u8981\u52a0\u9501\u2014\u2014\u4e0d\u662f\u6709\u5e03\u9686\u8fc7\u6ee4\u5668\u52a0\u6570\u636e\u5e93\u552f\u4e00\u7ea6\u675f\u5417？\u540e\u6765\u81ea\u5df1\u753b\u4e86\u4e00\u904d\u5e76\u53d1\u65f6\u5e8f\u56fe\u624d\u60f3\u660e\u767d：\u6ca1\u6709\u9501\u7684\u8bdd，\u4e24\u4e2a\u540c\u65f6\u521b\u5efa\u540c\u4e00 URL \u7684\u8bf7\u6c42，\u90fd\u4f1a\u8d70\u5230"\u67e5 DB\u2192\u6ca1\u67e5\u5230\u2192\u751f\u6210\u77ed\u7801\u2192\u63d2\u5165"\u8fd9\u56db\u6b65\u3002\u7b2c\u4e00\u4e2a\u8bf7\u6c42\u63d2\u5165\u6210\u529f\u540e，\u7b2c\u4e8c\u4e2a\u8bf7\u6c42\u56e0\u4e3a\u77ed\u7801\u4e0d\u540c（\u81ea\u52a8\u751f\u6210\u662f\u968f\u673a\u7684），\u4e5f\u4f1a\u63d2\u5165\u6210\u529f\u3002\u7ed3\u679c\u5c31\u662f\u540c\u4e00\u4e2a URL \u6709\u4e86\u4e24\u4e2a\u4e0d\u540c\u7684\u77ed\u7801\u3002<\/p>\n

      \u9501\u628a\u8fd9\u56db\u6b65\u5305\u6210\u4e00\u4e2a\u4e34\u754c\u533a，\u7b2c\u4e8c\u4e2a\u8bf7\u6c42\u5728"\u67e5 DB"\u90a3\u4e00\u6b65\u5c31\u4f1a\u53d1\u73b0\u8fd9\u4e2a URL \u5df2\u7ecf\u6709\u77ed\u7801\u4e86，\u76f4\u63a5\u8fd4\u56de\u5df2\u6709\u7684\u7ed3\u679c\u3002\u8fd9\u5c31\u662f\u5e42\u7b49\u6027\u7684\u4fdd\u8bc1\u3002<\/p>\n

      \u7b2c 4 \u6b65：\u81ea\u52a8\u6a21\u5f0f\u4e0b\u7684\u540c URL \u53bb\u91cd<\/h4>\n

      if<\/span> (<\/span>!<\/span>isCustom)<\/span> {<\/span>
      \n ShortLink<\/span> existing =<\/span> shortLinkMapper.<\/span>selectByOriginalUrl<\/span>(<\/span>urlHash,<\/span> originalUrl)<\/span>;<\/span>
      \n if<\/span> (<\/span>existing !=<\/span> null<\/span>)<\/span> {<\/span>
      \n return<\/span> convertToVO<\/span>(<\/span>existing)<\/span>;<\/span> \/\/ \u5df2\u5b58\u5728，\u76f4\u63a5\u8fd4\u56de<\/span>
      \n }<\/span>
      \n}<\/span><\/p>\n

      \u62ff urlHash \u548c originalUrl \u4e00\u8d77\u53bb\u6570\u636e\u5e93\u67e5（\u4e24\u4e2a\u6761\u4ef6\u90fd\u662f\u4e3a\u4e86\u4fdd\u8bc1\u51c6\u786e，\u56e0\u4e3a SHA-256 \u7406\u8bba\u4e0a\u5b58\u5728\u78b0\u649e\u7684\u53ef\u80fd，\u867d\u7136\u6982\u7387\u6781\u4f4e）\u3002\u5982\u679c\u67e5\u5230\u4e86，\u8bf4\u660e\u8fd9\u4e2a URL \u4e4b\u524d\u5df2\u7ecf\u88ab\u4eba\u521b\u5efa\u8fc7\u77ed\u94fe\u63a5\u4e86，\u76f4\u63a5\u8fd4\u56de\u73b0\u6210\u7684，\u4e0d\u7528\u518d\u751f\u6210\u4e00\u4e2a\u3002<\/p>\n

      \u8fd9\u4e2a\u903b\u8f91\u8ba9\u81ea\u52a8\u6a21\u5f0f\u53d8\u6210\u4e86\u5e42\u7b49\u7684：\u540c\u4e00\u4e2a URL \u4e0d\u7ba1\u4f60\u8c03\u7528\u591a\u5c11\u6b21\u521b\u5efa\u63a5\u53e3，\u90fd\u53ea\u4f1a\u6709\u552f\u4e00\u7684\u4e00\u4e2a\u77ed\u7801\u3002<\/p>\n

      \u7b2c 5 \u6b65：\u786e\u5b9a\u77ed\u7801<\/h4>\n

      \u8fd9\u662f\u6700\u5173\u952e\u7684\u4e00\u6b65，\u5206\u4e24\u79cd\u60c5\u51b5\u3002<\/p>\n

      \u81ea\u5b9a\u4e49\u6a21\u5f0f：<\/p>\n

      if<\/span> (<\/span>bloomFilterUtil.<\/span>mightContain<\/span>(<\/span>customCode)<\/span>)<\/span> {<\/span>
      \n ShortLink<\/span> existByCode =<\/span> shortLinkMapper.<\/span>selectByShortCode<\/span>(<\/span>customCode)<\/span>;<\/span>
      \n if<\/span> (<\/span>existByCode !=<\/span> null<\/span>)<\/span> {<\/span>
      \n throw<\/span> new<\/span> BusinessException<\/span>(<\/span>ResultCode<\/span>.<\/span>SHORT_CODE_EXISTS<\/span>)<\/span>;<\/span>
      \n }<\/span>
      \n}<\/span><\/p>\n

      \u8fd9\u91cc\u7684\u5224\u65ad\u5206\u4e24\u5c42\u3002\u7b2c\u4e00\u5c42\u662f\u5e03\u9686\u8fc7\u6ee4\u5668，\u4e00\u4e2a\u6982\u7387\u578b\u6570\u636e\u7ed3\u6784，\u5b83\u80fd\u544a\u8bc9\u4f60"\u8fd9\u4e2a\u77ed\u7801\u4e00\u5b9a\u4e0d\u5b58\u5728"\u6216\u8005"\u53ef\u80fd\u5b58\u5728"\u3002<\/p>\n

      \u5982\u679c\u5e03\u9686\u8fc7\u6ee4\u5668\u8bf4\u4e00\u5b9a\u4e0d\u5b58\u5728，\u90a3\u5c31\u53ef\u4ee5\u653e\u5fc3\u7528\u3002\u5982\u679c\u5b83\u8bf4"\u53ef\u80fd\u5b58\u5728"，\u90a3\u5c31\u4e0d\u4e00\u5b9a\u4e86\u2014\u2014\u5b83\u6709 0.1% \u7684\u8bef\u5224\u7387，\u4e5f\u5c31\u662f\u6bcf 1000 \u6b21\u91cc\u5927\u7ea6\u6709\u4e00\u6b21"\u5b9e\u9645\u4e0d\u5b58\u5728\u5374\u88ab\u8bf4\u53ef\u80fd\u5b58\u5728"\u3002\u6240\u4ee5\u8fd9\u65f6\u5019\u8fd8\u5f97\u53bb\u6570\u636e\u5e93\u91cc\u67e5\u4e00\u4e0b\u786e\u8ba4\u3002<\/p>\n

      \u8fd9\u79cd\u4e24\u5c42\u786e\u8ba4\u7684\u505a\u6cd5\u5728\u6027\u80fd\u654f\u611f\u7684\u573a\u5408\u5f88\u5e38\u89c1：\u5927\u90e8\u5206\u60c5\u51b5\u5e03\u9686\u8fc7\u6ee4\u5668\u76f4\u63a5\u6321\u6389\u4e86（\u4e0d\u9700\u8981\u67e5\u6570\u636e\u5e93），\u5c11\u6570\u8bef\u5224\u624d\u9700\u8981\u67e5\u5e93\u515c\u5e95\u3002<\/p>\n

      \u81ea\u52a8\u751f\u6210\u6a21\u5f0f：<\/p>\n

      shortCode =<\/span> shortCodeGenerator.<\/span>generate<\/span>(<\/span>)<\/span>;<\/span>
      \nwhile<\/span> (<\/span>bloomFilterUtil.<\/span>mightContain<\/span>(<\/span>shortCode)<\/span>)<\/span> {<\/span>
      \n shortCode =<\/span> shortCodeGenerator.<\/span>generate<\/span>(<\/span>)<\/span>;<\/span>
      \n}<\/span><\/p>\n

      \u751f\u6210\u4e00\u4e2a 6 \u4f4d\u77ed\u7801，\u7136\u540e\u95ee\u5e03\u9686\u8fc7\u6ee4\u5668：\u8fd9\u4e2a\u7801\u5b58\u5728\u5417？\u5982\u679c\u5b58\u5728\u5c31\u518d\u751f\u6210\u4e00\u4e2a，\u5faa\u73af\u5230\u4e0d\u51b2\u7a81\u4e3a\u6b62\u30026 \u4f4d Base62 \u6709\u5927\u7ea6 568 \u4ebf\u79cd\u7ec4\u5408，\u78b0\u649e\u6982\u7387\u6781\u4f4e，\u4e00\u822c\u5faa\u73af\u4e00\u4e24\u6b21\u5c31\u51fa\u6765\u4e86\u3002<\/p>\n

      \u7b2c 6-7 \u6b65：\u5199\u6570\u636e\u5e93<\/h4>\n

      \u6784\u5efa\u5b9e\u4f53\u5bf9\u8c61，\u8c03\u7528 shortLinkMapper.insert(shortLink) \u63d2\u5165\u6570\u636e\u5e93\u3002\u8fd9\u91cc\u6709\u4e00\u4e2a\u515c\u5e95\u4fdd\u62a4：\u6570\u636e\u5e93\u7684 short_code \u5b57\u6bb5\u6709 UNIQUE \u7ea6\u675f\u3002\u4e07\u4e00\u5728\u6781\u7aef\u5e76\u53d1\u4e0b\u5e03\u9686\u8fc7\u6ee4\u5668\u6f0f\u4e86\u3001\u9501\u4e5f\u6ca1\u5b8c\u5168\u9632\u4f4f，\u6570\u636e\u5e93\u7684\u552f\u4e00\u7d22\u5f15\u662f\u6700\u540e\u4e00\u9053\u9632\u7ebf，\u91cd\u590d\u63d2\u5165\u4f1a\u76f4\u63a5\u62a5\u9519\u3002<\/p>\n

      \u7b2c 8 \u6b65：\u6ce8\u518c\u5e03\u9686\u8fc7\u6ee4\u5668<\/h4>\n

      bloomFilterUtil.<\/span>add<\/span>(<\/span>shortCode)<\/span>;<\/span><\/p>\n

      \u63d2\u5165\u6210\u529f\u540e，\u544a\u8bc9\u5e03\u9686\u8fc7\u6ee4\u5668"\u8fd9\u4e2a\u77ed\u7801\u5df2\u5b58\u5728"，\u540e\u7eed\u7684\u521b\u5efa\u8bf7\u6c42\u5c31\u4e0d\u4f1a\u518d\u751f\u6210\u8ddf\u5b83\u51b2\u7a81\u7684\u77ed\u7801\u4e86\u3002<\/p>\n

      \u7b2c 9 \u6b65：\u7f13\u5b58\u56de\u586b<\/h4>\n

      int<\/span> randomExpire =<\/span> expireHours +<\/span> random.<\/span>nextInt<\/span>(<\/span>randomHours)<\/span>;<\/span>
      \nstringRedisTemplate.<\/span>opsForValue<\/span>(<\/span>)<\/span>.<\/span>set<\/span>(<\/span>
      \n "shortlink:url:"<\/span> +<\/span> shortCode,<\/span> originalUrl,<\/span> randomExpire,<\/span> TimeUnit<\/span>.<\/span>HOURS<\/span>
      \n)<\/span>;<\/span><\/p>\n

      \u628a\u77ed\u7801\u548c\u539f\u59cb URL \u7684\u6620\u5c04\u5b58\u8fdb Redis，\u8fd9\u6837\u540e\u7eed\u7684\u8df3\u8f6c\u8bf7\u6c42\u5c31\u4e0d\u7528\u6bcf\u6b21\u90fd\u67e5\u6570\u636e\u5e93\u4e86\u3002<\/p>\n

      TTL \u4e0d\u662f\u56fa\u5b9a\u7684 24 \u5c0f\u65f6，\u800c\u662f 24 + random(0,6) = 24 \u5230 30 \u5c0f\u65f6\u7684\u968f\u673a\u503c\u3002\u8fd9\u4e00\u4e2a\u5c0f\u504f\u79fb，\u662f\u4e3a\u4e86\u9632\u6b62\u6240\u6709\u7f13\u5b58\u5728\u540c\u4e00\u65f6\u523b\u96c6\u4f53\u8fc7\u671f，\u77ac\u95f4\u6240\u6709\u8bf7\u6c42\u90fd\u6253\u5230\u6570\u636e\u5e93\u2014\u2014\u4e5f\u5c31\u662f\u7f13\u5b58\u96ea\u5d29\u3002\u6211\u7b2c\u4e00\u6b21\u770b\u5230\u8fd9\u4e2a\u8bbe\u8ba1\u7684\u65f6\u5019\u89c9\u5f97"\u6709\u5fc5\u8981\u5417，\u4e0d\u5c31\u5dee\u51e0\u4e2a\u5c0f\u65f6\u5417"，\u540e\u6765\u8bfb\u4e86\u4e00\u4e9b\u751f\u4ea7\u4e8b\u6545\u590d\u76d8，\u53d1\u73b0\u8fd9\u786e\u5b9e\u662f\u4e00\u4e2a\u4f4e\u6210\u672c\u4f46\u6709\u6548\u7684\u9632\u5fa1\u624b\u6bb5\u3002<\/p>\n

      \u7b2c 10-11 \u6b65：\u91ca\u653e\u9501，\u8fd4\u56de\u7ed3\u679c<\/h4>\n

      \u5728 finally \u5757\u91cc\u91ca\u653e\u9501，\u7136\u540e\u7ec4\u88c5 VO \u8fd4\u56de\u3002VO \u91cc\u6700\u91cd\u8981\u7684\u662f shortUrl，\u7531\u914d\u7f6e\u91cc\u7684\u57df\u540d + \u201c\/sl\/\u201d + \u77ed\u7801\u62fc\u63a5\u800c\u6210，\u6bd4\u5982 http:\/\/localhost:8080\/sl\/aB3xY9\u3002<\/p>\n

      \n

      \u4e24\u4e2a\u5173\u952e\u7ec4\u4ef6\u5c55\u5f00\u804a<\/h3>\n

      \u5e03\u9686\u8fc7\u6ee4\u5668<\/h4>\n

      \u5e03\u9686\u8fc7\u6ee4\u5668\u662f\u6211\u5728\u8fd9\u4e2a\u9879\u76ee\u91cc\u65b0\u8ba4\u8bc6\u7684\u4e00\u4e2a\u5de5\u5177\u3002\u5b83\u7684\u539f\u7406\u4e0d\u590d\u6742：\u4e00\u4e2a\u5927\u7684 bit \u6570\u7ec4，\u52a0\u51e0\u4e2a\u54c8\u5e0c\u51fd\u6570\u3002<\/p>\n

      \u52a0\u4e00\u4e2a\u5143\u7d20\u7684\u65f6\u5019，\u7528 K \u4e2a\u54c8\u5e0c\u51fd\u6570\u7b97\u51fa K \u4e2a\u4f4d\u7f6e，\u628a\u90a3\u4e9b\u4f4d\u7f6e\u7684 bit \u90fd\u8bbe\u6210 1\u3002\u67e5\u7684\u65f6\u5019，\u7528\u540c\u6837\u7684 K \u4e2a\u54c8\u5e0c\u51fd\u6570\u7b97\u51fa\u4f4d\u7f6e，\u5982\u679c\u6709\u4e00\u4e2a bit \u662f 0，\u90a3\u8fd9\u4e2a\u5143\u7d20\u4e00\u5b9a\u6ca1\u88ab\u52a0\u8fc7；\u5982\u679c\u5168\u662f 1，\u90a3\u5b83\u53ef\u80fd\u5b58\u5728，\u56e0\u4e3a\u6709\u53ef\u80fd\u662f\u522b\u7684\u5143\u7d20\u6070\u597d\u628a\u8fd9\u4e9b\u4f4d\u7f6e\u90fd\u7f6e\u4e3a 1 \u4e86\u3002<\/p>\n

      \u8fd9\u4e2a"\u53ef\u80fd\u5b58\u5728"\u5c31\u662f\u5e03\u9686\u8fc7\u6ee4\u5668\u7684\u8bef\u5224\u3002\u8bef\u5224\u7387\u53d6\u51b3\u4e8e bit \u6570\u7ec4\u7684\u5927\u5c0f\u548c\u54c8\u5e0c\u51fd\u6570\u7684\u6570\u91cf\u3002\u672c\u9879\u76ee\u7684\u914d\u7f6e\u662f 100 \u4e07\u5bb9\u91cf + 0.1% \u7684\u8bef\u5224\u7387，\u5927\u6982\u5360\u7528 1.7 MB \u7684 Redis \u5185\u5b58\u3002<\/p>\n

      \u4e3a\u4ec0\u4e48\u4e0d\u7528 Redis \u7684 Set \u76f4\u63a5\u5b58\u6240\u6709\u77ed\u7801？\u56e0\u4e3a 100 \u4e07\u4e2a\u77ed\u7801\u7528 Set \u5b58\u8981\u51e0\u5341 MB，\u5e03\u9686\u8fc7\u6ee4\u5668\u53ea\u8981 1.7 MB\u3002\u6211\u7b2c\u4e00\u6b21\u770b\u5230 1.7 MB \u8fd9\u4e2a\u6570\u5b57\u7684\u65f6\u5019\u8fd8\u4ee5\u4e3a\u81ea\u5df1\u7b97\u9519\u4e86，\u53cd\u590d\u786e\u8ba4\u4e86\u4e24\u904d\u2014\u2014\u8fd9\u4e48\u5c0f\u7684\u4ee3\u4ef7\u6362\u6765\u4e00\u4e2a"\u5feb\u901f\u5224\u65ad\u4e0d\u5b58\u5728"\u7684\u80fd\u529b，\u6027\u4ef7\u6bd4\u592a\u9ad8\u4e86\u3002\u5bf9\u4e8e"\u4ec5\u7528\u4e8e\u5feb\u901f\u5224\u65ad\u4e0d\u5b58\u5728"\u8fd9\u4e2a\u573a\u666f\u6765\u8bf4，\u5b8c\u5168\u591f\u7528\u3002<\/p>\n

      \u77ed\u7801\u751f\u6210\u5668<\/h4>\n

      \u8fd9\u662f\u6211\u89c9\u5f97\u6700\u6709\u610f\u601d\u7684\u7ec4\u4ef6\u3002\u5b83\u662f\u600e\u4e48\u751f\u6210\u552f\u4e00\u77ed\u7801\u7684？<\/p>\n

      \u6838\u5fc3\u601d\u8def\u501f\u9274\u4e86\u96ea\u82b1\u7b97\u6cd5（Snowflake）\u7684 ID \u751f\u6210\u65b9\u5f0f：\u4e00\u4e2a 64 \u4f4d\u7684\u6570\u5b57，\u7531\u65f6\u95f4\u6233（41 \u4f4d）+ \u673a\u5668 ID（10 \u4f4d）+ \u5e8f\u5217\u53f7（12 \u4f4d）\u62fc\u6210\u3002\u8fd9\u6837\u4fdd\u8bc1\u6bcf\u4e2a ID \u5168\u5c40\u552f\u4e00\u4e14\u8d8b\u52bf\u9012\u589e\u3002<\/p>\n

      \u4f46\u76f4\u63a5\u7528\u8fd9\u4e2a ID \u6709\u95ee\u9898：\u5b83\u662f\u9012\u589e\u7684，\u522b\u4eba\u53ef\u4ee5\u904d\u5386\u3002\u6240\u4ee5\u4ee3\u7801\u91cc\u505a\u4e86\u4e00\u6b65\u5f02\u6216\u6df7\u6dc6：<\/p>\n

      uniqueId =<\/span> Math<\/span>.<\/span>abs<\/span>(<\/span>uniqueId ^<\/span> random.<\/span>nextLong<\/span>(<\/span>)<\/span>)<\/span>;<\/span><\/p>\n

      \u628a\u81ea\u589e ID \u548c\u4e00\u4e2a\u968f\u673a\u6570\u5f02\u6216，\u7ed3\u679c\u7684\u89c4\u5f8b\u6027\u5c31\u5b8c\u5168\u88ab\u6253\u4e71\u4e86，\u65e0\u6cd5\u4ece\u77ed\u7801\u53cd\u63a8\u51fa ID\u3002<\/p>\n

      \u7136\u540e\u628a\u6df7\u6dc6\u540e\u7684 64 \u4f4d\u6570\u5b57\u7528 Base62 \u7f16\u7801\u8f6c\u6210 6 \u4f4d\u5b57\u7b26\u4e32\u3002Base62 \u7528\u4e86 0-9\u3001A-Z\u3001a-z \u8fd9 62 \u4e2a\u5b57\u7b26，\u4e0d\u50cf Base64 \u90a3\u6837\u5e26 + \u548c \/，\u5728 URL \u91cc\u5b8c\u5168\u4e0d\u9700\u8981\u8f6c\u4e49\u3002<\/p>\n

      \u6709\u4e2a\u7ec6\u8282\u503c\u5f97\u4e00\u63d0：\u4ee3\u7801\u91cc\u5bf9\u65f6\u949f\u56de\u62e8\u505a\u4e86\u517c\u5bb9\u3002System.currentTimeMillis() \u53ef\u80fd\u56e0\u4e3a NTP \u65f6\u95f4\u540c\u6b65\u56de\u9000\u51e0\u6beb\u79d2，\u5982\u679c\u76f4\u63a5\u53d6\u5f53\u524d\u65f6\u95f4，\u751f\u6210\u7684 ID \u53ef\u80fd\u4f1a\u8ddf\u4e4b\u524d\u7684\u91cd\u590d\u3002\u7b2c\u4e00\u6b21\u8bfb\u5230\u8fd9\u7684\u65f6\u5019\u6211\u5fc3\u60f3\u300c\u51e0\u6beb\u79d2\u800c\u5df2，\u81f3\u4e8e\u5417？\u300d\u3002\u540e\u6765\u81ea\u5df1\u6a21\u62df\u4e86\u4e00\u4e0b\u5206\u5e03\u5f0f\u9ad8\u5e76\u53d1\u7684\u573a\u666f\u624d\u53d1\u73b0，\u51e0\u6beb\u79d2\u8db3\u591f\u751f\u6210\u51e0\u5341\u4e0a\u767e\u4e2a ID \u4e86，\u4e00\u4e2a\u90fd\u4e0d\u80fd\u91cd\u590d\u3002\u8fd9\u4e2a\u7ec6\u8282\u8ba9\u6211\u8bb0\u4f4f\u4e86：\u5206\u5e03\u5f0f\u7cfb\u7edf\u91cc\u6ca1\u6709"\u5c0f\u95ee\u9898"\u3002\u4ee3\u7801\u7528\u4e86\u4e00\u4e2a AtomicLong \u8bb0\u5f55\u4e0a\u6b21\u7684\u65f6\u95f4\u6233，\u6bcf\u6b21\u751f\u6210\u65f6\u53d6 max(\u5f53\u524d\u65f6\u95f4, \u4e0a\u6b21\u65f6\u95f4)，\u4fdd\u8bc1\u4e86\u65f6\u95f4\u6233\u7684\u5355\u8c03\u9012\u589e\u3002<\/p>\n

      \n

      \u5f02\u5e38\u5904\u7406：\u6bcf\u79cd\u9519\u90fd\u6709\u5f52\u5bbf<\/h3>\n

      \u6574\u4e2a\u6d41\u7a0b\u91cc\u53ef\u80fd\u51fa\u95ee\u9898\u7684\u5730\u65b9\u4e0d\u5c11，\u4f46\u6bcf\u4e2a\u5f02\u5e38\u90fd\u6709\u660e\u786e\u7684\u5904\u7406\u8def\u5f84：<\/p>\n

        \n
      • \u9650\u6d41\u8d85\u4e86 \u2192 RateLimitException \u2192 HTTP 429，\u544a\u8bc9\u7528\u6237"\u522b\u5237\u4e86，\u4e00\u4f1a\u513f\u518d\u8bd5"<\/li>\n
      • \u53c2\u6570\u4e0d\u5bf9 \u2192 MethodArgumentNotValidException \u2192 HTTP 200 + \u4e1a\u52a1\u7801 401，\u544a\u8bc9\u7528\u6237\u5177\u4f53\u54ea\u4e2a\u5b57\u6bb5\u4e0d\u5bf9<\/li>\n
      • \u81ea\u5b9a\u4e49\u77ed\u7801\u5df2\u88ab\u5360\u7528 \u2192 BusinessException(SHORT_CODE_EXISTS) \u2192 HTTP 200 + \u4e1a\u52a1\u7801 505<\/li>\n
      • \u9501\u62a2\u4e0d\u5230 \u2192 BusinessException("\u7cfb\u7edf\u7e41\u5fd9") \u2192 HTTP 200 + \u4e1a\u52a1\u7801 500<\/li>\n
      • \u5176\u4ed6\u672a\u77e5\u5f02\u5e38 \u2192 Exception \u515c\u5e95 \u2192 HTTP 200 + \u4e1a\u52a1\u7801 900，\u540c\u65f6\u8bb0\u65e5\u5fd7<\/li>\n<\/ul>\n

        \u6240\u6709\u7684\u5f02\u5e38\u6620\u5c04\u96c6\u4e2d\u5728 GlobalExceptionHandler \u4e00\u4e2a\u7c7b\u91cc\u3002\u597d\u5904\u662f Controller \u548c Service \u4e0d\u7528\u5230\u5904\u5199 try-catch，\u4ee3\u7801\u5f88\u5e72\u51c0\u3002\u574f\u5904\u4e5f\u6709\u2014\u2014\u5982\u679c\u4f60\u5fd8\u8bb0\u4e86\u4e00\u79cd\u5f02\u5e38\u7c7b\u578b，\u5b83\u5c31\u4f1a\u6389\u8fdb\u515c\u5e95\u7684 900，\u6392\u67e5\u8d77\u6765\u9700\u8981\u7ffb\u65e5\u5fd7\u3002<\/p>\n

        \u6211\u5f53\u65f6\u5728\u8fd9\u4e2a\u5730\u65b9\u8e29\u4e86\u4e2a\u5751：\u81ea\u5b9a\u4e49\u77ed\u7801\u51b2\u7a81\u629b\u51fa\u7684 BusinessException，\u5b83\u7684 HTTP \u72b6\u6001\u7801\u662f 200 \u800c\u4e0d\u662f 409\u3002\u6211\u8ddf\u524d\u7aef\u5bf9\u63a5\u7684\u65f6\u5019\u4e60\u60ef\u6027\u4ee5\u4e3a"\u51b2\u7a81\u5c31\u662f 409"，\u7ed3\u679c\u524d\u7aef\u540c\u5b66\u6309 HTTP \u72b6\u6001\u7801\u5199\u4e86\u5224\u65ad，\u4e00\u76f4\u8d70\u4e0d\u5230\u6b63\u786e\u7684\u5206\u652f\u3002\u540e\u6765\u770b\u4e86 GlobalExceptionHandler \u7684\u4ee3\u7801\u624d\u641e\u660e\u767d\u2014\u2014\u8fd9\u4e2a\u9879\u76ee\u7edf\u4e00\u7528 HTTP 200，\u771f\u6b63\u7684\u72b6\u6001\u653e\u5728 body \u7684\u4e1a\u52a1\u7801\u91cc\u3002\u6240\u4ee5\u770b\u4e00\u4e2a\u9879\u76ee\u7684\u63a5\u53e3\u89c4\u8303，\u6700\u597d\u5148\u7ffb\u5b83\u7684\u5f02\u5e38\u5904\u7406\u5668\u3002<\/p>\n

        \n

        \u4e32\u8054\u8d77\u6765：\u4e00\u4e2a\u5b8c\u6574\u8bf7\u6c42\u7684\u65f6\u95f4\u7ebf<\/h3>\n

        \u628a\u4e0a\u9762\u6240\u6709\u4e1c\u897f\u4e32\u8d77\u6765，\u4e00\u4e2a\u521b\u5efa\u8bf7\u6c42\u4ece\u5934\u5230\u5c3e\u5927\u6982\u662f\u8fd9\u6837\u7684：<\/p>\n

      • \u5ba2\u6237\u7aef\u53d1\u6765 POST \u8bf7\u6c42，\u5e26\u4e0a\u539f\u59cb URL<\/li>\n
      • \u9650\u6d41\u62e6\u622a\u5668\u5148\u62e6\u622a，\u6267\u884c Lua \u811a\u672c，60 \u79d2\u5185\u8be5 IP \u7684\u7b2c 11 \u6b21\u8bf7\u6c42\u4f1a\u88ab\u76f4\u63a5\u62d2\u7edd<\/li>\n
      • \u6ca1\u8d85\u9650，\u653e\u884c\u5230 Controller，@Valid \u89e6\u53d1\u53c2\u6570\u6821\u9a8c<\/li>\n
      • \u6821\u9a8c\u901a\u8fc7，\u8fdb\u5165 Service \u5c42<\/li>\n
      • \u5bf9 URL \u505a SHA-256 \u54c8\u5e0c<\/li>\n
      • \u83b7\u53d6\u5206\u5e03\u5f0f\u9501（\u6700\u591a\u7b49 5 \u79d2）<\/li>\n
      • \u81ea\u52a8\u6a21\u5f0f\u4e0b，\u67e5\u6570\u636e\u5e93\u770b\u8fd9\u4e2a URL \u662f\u4e0d\u662f\u5df2\u7ecf\u521b\u5efa\u8fc7<\/li>\n
      • \u6ca1\u521b\u5efa\u8fc7，\u8c03\u7528\u77ed\u7801\u751f\u6210\u5668\u751f\u6210 6 \u4f4d Base62 \u77ed\u7801<\/li>\n
      • \u7528\u5e03\u9686\u8fc7\u6ee4\u5668\u5feb\u901f\u5224\u65ad\u77ed\u7801\u662f\u5426\u51b2\u7a81，\u51b2\u7a81\u5c31\u91cd\u65b0\u751f\u6210<\/li>\n
      • \u5199\u6570\u636e\u5e93<\/li>\n
      • \u6ce8\u518c\u5e03\u9686\u8fc7\u6ee4\u5668<\/li>\n
      • \u56de\u586b Redis \u7f13\u5b58（TTL 24~30 \u5c0f\u65f6\u968f\u673a\u503c）<\/li>\n
      • \u91ca\u653e\u9501<\/li>\n
      • \u7ec4\u88c5 VO \u8fd4\u56de\u7ed9\u524d\u7aef<\/li>\n

        \u6574\u4e2a\u8fc7\u7a0b\u7684\u74f6\u9888\u5728\u54ea？\u5927\u6982\u7387\u662f\u7b2c 6 \u6b65\u7684\u9501\u548c\u7b2c 7 \u6b65\u7684\u6570\u636e\u5e93\u67e5\u8be2\u3002Redis \u64cd\u4f5c（\u9650\u6d41\u3001\u9501\u3001\u7f13\u5b58）\u901a\u5e38\u5728\u6beb\u79d2\u7ea7，\u5e03\u9686\u8fc7\u6ee4\u5668\u4e5f\u662f Redis \u64cd\u4f5c，\u51e0\u4e4e\u65e0\u611f\u3002\u6570\u636e\u5e93\u5199\u5165\u56e0\u4e3a\u91cf\u5c0f\u4e5f\u5f88\u5feb\u3002\u771f\u6b63\u53ef\u80fd\u6162\u7684\u662f\u9ad8\u5e76\u53d1\u4e0b\u7684\u9501\u7ade\u4e89\u3002<\/p>\n

        \n

        \u6211\u5b66\u5230\u7684\u4e1c\u897f<\/h3>\n

        \u5199\u5b8c\u8fd9\u7bc7\u6587\u7ae0，\u6211\u628a\u6574\u4e2a\u9879\u76ee\u53c8\u8fc7\u4e86\u4e00\u904d，\u6709\u51e0\u4e2a\u611f\u53d7：<\/p>\n

        \u7b2c\u4e00，\u7b80\u5355\u529f\u80fd\u4e0d\u7b49\u4e8e\u7b80\u5355\u5b9e\u73b0\u3002 \u770b\u8d77\u6765\u53ea\u662f"\u628a\u957f\u94fe\u63a5\u53d8\u77ed"，\u4f46\u8981\u505a\u5230\u9ad8\u5e76\u53d1\u4e0b\u7684\u6b63\u786e\u6027\u3001\u9632\u5237\u3001\u9632\u904d\u5386\u3001\u7f13\u5b58\u4f18\u5316，\u9700\u8981\u5341\u51e0\u4e2a\u7ec4\u4ef6\u534f\u540c\u5de5\u4f5c\u3002<\/p>\n

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