{"id":171,"date":"2023-05-22T14:14:24","date_gmt":"2023-05-22T06:14:24","guid":{"rendered":"https:\/\/xinchewhd.com.cn\/?p=171"},"modified":"2023-05-22T14:47:45","modified_gmt":"2023-05-22T06:47:45","slug":"22fb83281a","status":"publish","type":"post","link":"https:\/\/xinchewhd.com.cn\/index.php\/java\/22fb83281a\/","title":{"rendered":"\u4e5d\u79cd\u5206\u5e03\u5f0fID\u89e3\u51b3\u65b9\u6848\uff0c\u603b\u6709\u4e00\u6b3e\u9002\u5408\u4f60\uff01"},"content":{"rendered":"
\n
<\/section>\n
\n

\u80cc\u666f<\/h2>\n

\u5728\u590d\u6742\u7684\u5206\u5e03\u5f0f\u7cfb\u7edf\u4e2d\uff0c\u5f80\u5f80\u9700\u8981\u5bf9\u5927\u91cf\u7684\u6570\u636e\u8fdb\u884c\u552f\u4e00\u6807\u8bc6\uff0c\u6bd4\u5982\u5728\u5bf9\u4e00\u4e2a\u8ba2\u5355\u8868\u8fdb\u884c\u4e86\u5206\u5e93\u5206\u8868\u64cd\u4f5c\uff0c\u8fd9\u65f6\u5019\u6570\u636e\u5e93\u7684\u81ea\u589eID\u663e\u7136\u4e0d\u80fd\u4f5c\u4e3a\u67d0\u4e2a\u8ba2\u5355\u7684\u552f\u4e00\u6807\u8bc6\u3002\u9664\u6b64\u4e4b\u5916\u8fd8\u6709\u5176\u4ed6\u5206\u5e03\u5f0f\u573a\u666f\u5bf9\u5206\u5e03\u5f0fID\u7684\u4e00\u4e9b\u8981\u6c42\uff1a<\/p>\n

    \n
  • \n
    \u8d8b\u52bf\u9012\u589e\uff1a<\/strong>\u00a0\u7531\u4e8e\u591a\u6570RDBMS\u4f7f\u7528B-tree\u7684\u6570\u636e\u7ed3\u6784\u6765\u5b58\u50a8\u7d22\u5f15\u6570\u636e\uff0c\u5728\u4e3b\u952e\u7684\u9009\u62e9\u4e0a\u9762\u6211\u4eec\u5e94\u8be5\u5c3d\u91cf\u4f7f\u7528\u6709\u5e8f\u7684\u4e3b\u952e\u4fdd\u8bc1\u5199\u5165\u6027\u80fd\u3002<\/section>\n<\/li>\n
  • \n
    \u5355\u8c03\u9012\u589e\uff1a<\/strong>\u00a0\u4fdd\u8bc1\u4e0b\u4e00\u4e2aID\u4e00\u5b9a\u5927\u4e8e\u4e0a\u4e00\u4e2aID\uff0c\u4f8b\u5982\u6392\u5e8f\u9700\u6c42\u3002<\/section>\n<\/li>\n
  • \n
    \u4fe1\u606f\u5b89\u5168\uff1a<\/strong>\u00a0\u5982\u679cID\u662f\u8fde\u7eed\u7684\uff0c\u6076\u610f\u7528\u6237\u7684\u6252\u53d6\u5de5\u4f5c\u5c31\u975e\u5e38\u5bb9\u6613\u505a\u4e86\uff1b\u5982\u679c\u662f\u8ba2\u5355\u53f7\u5c31\u66f4\u5371\u9669\u4e86\uff0c\u53ef\u4ee5\u76f4\u63a5\u77e5\u9053\u6211\u4eec\u7684\u5355\u91cf\u3002\u6240\u4ee5\u5728\u4e00\u4e9b\u5e94\u7528\u573a\u666f\u4e0b\uff0c\u4f1a\u9700\u8981ID\u65e0\u89c4\u5219\u3001\u4e0d\u89c4\u5219\u3002<\/section>\n<\/li>\n<\/ul>\n

    \u5c31\u4e0d\u540c\u7684\u573a\u666f\u53ca\u8981\u6c42\uff0c\u5e02\u9762\u8bde\u751f\u4e86\u5f88\u591a\u5206\u5e03\u5f0fID\u89e3\u51b3\u65b9\u6848\u3002\u672c\u6587\u9488\u5bf9\u591a\u4e2a\u5206\u5e03\u5f0fID\u89e3\u51b3\u65b9\u6848\u8fdb\u884c\u4ecb\u7ecd\uff0c\u5305\u62ec\u5176\u4f18\u7f3a\u70b9\u3001\u4f7f\u7528\u573a\u666f\u53ca\u4ee3\u7801\u793a\u4f8b\u3002<\/p>\n

    1\u3001UUID<\/h2>\n

    UUID(Universally Unique Identifier<\/code>)\u662f\u57fa\u4e8e\u5f53\u524d\u65f6\u95f4\u3001\u8ba1\u6570\u5668\uff08counter\uff09\u548c\u786c\u4ef6\u6807\u8bc6\uff08\u901a\u5e38\u4e3a\u65e0\u7ebf\u7f51\u5361\u7684MAC\u5730\u5740\uff09\u7b49\u6570\u636e\u8ba1\u7b97\u751f\u6210\u7684\u3002\u5305\u542b32\u4e2a16\u8fdb\u5236\u6570\u5b57\uff0c\u4ee5\u8fde\u5b57\u53f7\u5206\u4e3a\u4e94\u6bb5\uff0c\u5f62\u5f0f\u4e3a8-4-4-4-12\u768436\u4e2a\u5b57\u7b26\uff0c\u53ef\u4ee5\u751f\u6210\u5168\u7403\u552f\u4e00\u7684\u7f16\u7801\u5e76\u4e14\u6027\u80fd\u9ad8\u6548\u3002<\/p>\n

    JDK\u63d0\u4f9b\u4e86UUID\u751f\u6210\u5de5\u5177\uff0c\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n

    import<\/span>\u00a0java.util.UUID;

    public<\/span>\u00a0class<\/span>\u00a0Test<\/span>\u00a0<\/span>{
    \u00a0\u00a0\u00a0\u00a0public<\/span>\u00a0static<\/span>\u00a0void<\/span>\u00a0main<\/span>(String[]\u00a0args)<\/span>\u00a0<\/span>{
    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0System.out.println(UUID.randomUUID());
    \u00a0\u00a0\u00a0\u00a0}
    }
    <\/code><\/pre>\n
    \u8f93\u51fa\u5982\u4e0b<\/p>\n
    \n
    b0378f6a-eeb7-4779-bffe-2a9f3bc76380<\/p>\n<\/blockquote>\n
    UUID\u5b8c\u5168\u53ef\u4ee5\u6ee1\u8db3\u5206\u5e03\u5f0f\u552f\u4e00\u6807\u8bc6\uff0c\u4f46\u662f\u5728\u5b9e\u9645\u5e94\u7528\u8fc7\u7a0b\u4e2d\u4e00\u822c\u4e0d\u91c7\u7528\uff0c\u6709\u5982\u4e0b\u51e0\u4e2a\u539f\u56e0\uff1a<\/p>\n
      \n
    • \n
      \u5b58\u50a8\u6210\u672c\u9ad8\uff1a<\/strong>\u00a0UUID\u592a\u957f\uff0c16\u5b57\u8282128\u4f4d\uff0c\u901a\u5e38\u4ee536\u957f\u5ea6\u7684\u5b57\u7b26\u4e32\u8868\u793a\uff0c\u5f88\u591a\u573a\u666f\u4e0d\u9002\u7528\u3002<\/section>\n<\/li>\n
    • \n
      \u4fe1\u606f\u4e0d\u5b89\u5168\uff1a<\/strong>\u00a0\u57fa\u4e8eMAC\u5730\u5740\u751f\u6210\u7684UUID\u7b97\u6cd5\u4f1a\u66b4\u9732MAC\u5730\u5740\uff0c\u66fe\u7ecf\u6885\u4e3d\u838e\u75c5\u6bd2\u7684\u5236\u9020\u8005\u5c31\u662f\u6839\u636eUUID\u5bfb\u627e\u7684\u3002<\/section>\n<\/li>\n
    • \n
      \u4e0d\u7b26\u5408MySQL\u4e3b\u952e\u8981\u6c42\uff1a<\/strong>\u00a0MySQL\u5b98\u65b9\u6709\u660e\u786e\u7684\u5efa\u8bae\u4e3b\u952e\u8981\u5c3d\u91cf\u8d8a\u77ed\u8d8a\u597d\uff0c\u56e0\u4e3a\u592a\u957f\u5bf9MySQL\u7d22\u5f15\u4e0d\u5229\uff1a\u5982\u679c\u4f5c\u4e3a\u6570\u636e\u5e93\u4e3b\u952e\uff0c\u5728InnoDB\u5f15\u64ce\u4e0b\uff0cUUID\u7684\u65e0\u5e8f\u6027\u53ef\u80fd\u4f1a\u5f15\u8d77\u6570\u636e\u4f4d\u7f6e\u9891\u7e41\u53d8\u52a8\uff0c\u4e25\u91cd\u5f71\u54cd\u6027\u80fd\u3002<\/section>\n<\/li>\n<\/ul>\n
      2\u3001\u6570\u636e\u5e93\u81ea\u589eID<\/h2>\n
      \u5229\u7528Mysql\u7684\u7279\u6027ID\u81ea\u589e\uff0c\u53ef\u4ee5\u8fbe\u5230\u6570\u636e\u552f\u4e00\u6807\u8bc6\uff0c\u4f46\u662f\u5206\u5e93\u5206\u8868\u540e\u53ea\u80fd\u4fdd\u8bc1\u4e00\u4e2a\u8868\u4e2d\u7684ID\u7684\u552f\u4e00\uff0c\u800c\u4e0d\u80fd\u4fdd\u8bc1\u6574\u4f53\u7684ID\u552f\u4e00\u3002\u4e3a\u4e86\u907f\u514d\u8fd9\u79cd\u60c5\u51b5\uff0c\u6211\u4eec\u6709\u4ee5\u4e0b\u4e24\u79cd\u65b9\u5f0f\u89e3\u51b3\u8be5\u95ee\u9898\u3002<\/p>\n
      2.1\u3001\u4e3b\u952e\u8868<\/h3>\n
      \u901a\u8fc7\u5355\u72ec\u521b\u5efa\u4e3b\u952e\u8868\u7ef4\u62a4\u552f\u4e00\u6807\u8bc6\uff0c\u4f5c\u4e3aID\u7684\u8f93\u51fa\u6e90\u53ef\u4ee5\u4fdd\u8bc1\u6574\u4f53ID\u7684\u552f\u4e00\u3002\u4e3e\u4e2a\u4f8b\u5b50\uff1a<\/p>\n
      \u521b\u5efa\u4e00\u4e2a\u4e3b\u952e\u8868<\/p>\n
      CREATE<\/span>\u00a0TABLE<\/span>\u00a0`unique_id`<\/span>\u00a0\u00a0(
      \u00a0\u00a0`id`<\/span>\u00a0bigint<\/span>\u00a0NOT<\/span>\u00a0NULL<\/span>\u00a0AUTO_INCREMENT,
      \u00a0\u00a0`biz`<\/span>\u00a0char<\/span>(1<\/span>)\u00a0NOT<\/span>\u00a0NULL<\/span>,
      \u00a0\u00a0PRIMARY\u00a0KEY<\/span>\u00a0(`id`<\/span>),
      \u00a0UNIQUE<\/span>\u00a0KEY<\/span>\u00a0`biz`<\/span>\u00a0(`biz`<\/span>)
      )\u00a0ENGINE<\/span>\u00a0=\u00a0InnoDB<\/span>\u00a0AUTO_INCREMENT=1<\/span>\u00a0DEFAULT<\/span>\u00a0CHARSET<\/span>\u00a0=utf8;
      <\/code><\/pre>\n
      \u4e1a\u52a1\u901a\u8fc7\u66f4\u65b0\u64cd\u4f5c\u6765\u83b7\u53d6ID\u4fe1\u606f\uff0c\u7136\u540e\u6dfb\u52a0\u5230\u67d0\u4e2a\u5206\u8868\u4e2d\u3002<\/p>\n
      BEGIN<\/span>;

      REPLACE<\/span>\u00a0INTO<\/span>\u00a0unique_id\u00a0(biz)\u00a0values<\/span>\u00a0('o'<\/span>)\u00a0;
      SELECT<\/span>\u00a0LAST_INSERT_ID<\/span>();

      COMMIT<\/span>;
      <\/code><\/pre>\n
      \"\u4e5d\u79cd\u5206\u5e03\u5f0fID\u89e3\u51b3\u65b9\u6848\uff0c\u603b\u6709\u4e00\u6b3e\u9002\u5408\u4f60\uff01\"
      2.2\u3001ID\u81ea\u589e\u6b65\u957f\u8bbe\u7f6e<\/h3>\n
      \u6211\u4eec\u53ef\u4ee5\u8bbe\u7f6eMysql\u4e3b\u952e\u81ea\u589e\u6b65\u957f\uff0c\u8ba9\u5206\u5e03\u5728\u4e0d\u540c\u5b9e\u4f8b\u7684\u8868\u6570\u636eID\u505a\u5230\u4e0d\u91cd\u590d\uff0c\u4fdd\u8bc1\u6574\u4f53\u7684\u552f\u4e00\u3002<\/p>\n
      \u5982\u4e0b\uff0c\u53ef\u4ee5\u8bbe\u7f6eMysql\u5b9e\u4f8b1\u6b65\u957f\u4e3a1\uff0c\u5b9e\u4f8b1\u6b65\u957f\u4e3a2\u3002<\/p>\n
      \"\u4e5d\u79cd\u5206\u5e03\u5f0fID\u89e3\u51b3\u65b9\u6848\uff0c\u603b\u6709\u4e00\u6b3e\u9002\u5408\u4f60\uff01\"
      \u67e5\u770b\u4e3b\u952e\u81ea\u589e\u7684\u5c5e\u6027<\/p>\n
      show<\/span>\u00a0variables<\/span>\u00a0like<\/span>\u00a0'%increment%'<\/span>
      <\/code><\/pre>\n
      \"\u4e5d\u79cd\u5206\u5e03\u5f0fID\u89e3\u51b3\u65b9\u6848\uff0c\u603b\u6709\u4e00\u6b3e\u9002\u5408\u4f60\uff01\"
      \u663e\u7136\uff0c\u8fd9\u79cd\u65b9\u5f0f\u5728\u5e76\u53d1\u91cf\u6bd4\u8f83\u9ad8\u7684\u60c5\u51b5\u4e0b\uff0c\u5982\u4f55\u4fdd\u8bc1\u6269\u5c55\u6027\u5176\u5b9e\u4f1a\u662f\u4e00\u4e2a\u95ee\u9898\u3002<\/p>\n
      3\u3001\u53f7\u6bb5\u6a21\u5f0f<\/h2>\n
      \u53f7\u6bb5\u6a21\u5f0f\u662f\u5f53\u4e0b\u5206\u5e03\u5f0fID\u751f\u6210\u5668\u7684\u4e3b\u6d41\u5b9e\u73b0\u65b9\u5f0f\u4e4b\u4e00\u3002\u5176\u539f\u7406\u5982\u4e0b\uff1a<\/p>\n
        \n
      • \n
        \u53f7\u6bb5\u6a21\u5f0f\u6bcf\u6b21\u4ece\u6570\u636e\u5e93\u53d6\u51fa\u4e00\u4e2a\u53f7\u6bb5\u8303\u56f4\uff0c\u52a0\u8f7d\u5230\u670d\u52a1\u5185\u5b58\u4e2d\u3002\u4e1a\u52a1\u83b7\u53d6\u65f6ID\u76f4\u63a5\u5728\u8fd9\u4e2a\u8303\u56f4\u9012\u589e\u53d6\u503c\u5373\u53ef\u3002<\/section>\n<\/li>\n
      • \n
        \u7b49\u8fd9\u6279\u53f7\u6bb5ID\u7528\u5b8c\uff0c\u518d\u6b21\u5411\u6570\u636e\u5e93\u7533\u8bf7\u65b0\u53f7\u6bb5\uff0c\u5bf9max_id\u5b57\u6bb5\u505a\u4e00\u6b21update\u64cd\u4f5c\uff0c\u65b0\u7684\u53f7\u6bb5\u8303\u56f4\u662f(max_id<\/code>\u00a0,max_id +step<\/code>]\u3002<\/section>\n<\/li>\n
      • \n
        \u7531\u4e8e\u591a\u4e1a\u52a1\u7aef\u53ef\u80fd\u540c\u65f6\u64cd\u4f5c\uff0c\u6240\u4ee5\u91c7\u7528\u7248\u672c\u53f7version\u4e50\u89c2\u9501\u65b9\u5f0f\u66f4\u65b0\u3002<\/section>\n<\/li>\n<\/ul>\n
        \"\u4e5d\u79cd\u5206\u5e03\u5f0fID\u89e3\u51b3\u65b9\u6848\uff0c\u603b\u6709\u4e00\u6b3e\u9002\u5408\u4f60\uff01\"
        \u4f8b\u5982 (1,1000] \u4ee3\u88681000\u4e2aID\uff0c\u5177\u4f53\u7684\u4e1a\u52a1\u670d\u52a1\u5c06\u672c\u53f7\u6bb5\u751f\u62101~1000\u7684\u81ea\u589eID\u3002\u8868\u7ed3\u6784\u5982\u4e0b\uff1a<\/p>\n
        CREATE<\/span>\u00a0TABLE<\/span>\u00a0id_generator\u00a0(
        \u00a0\u00a0id<\/span>\u00a0int<\/span>(10<\/span>)\u00a0NOT<\/span>\u00a0NULL<\/span>,
        \u00a0\u00a0max_id\u00a0bigint<\/span>(20<\/span>)\u00a0NOT<\/span>\u00a0NULL<\/span>\u00a0COMMENT<\/span>\u00a0'\u5f53\u524d\u6700\u5927id'<\/span>,
        \u00a0\u00a0step\u00a0int<\/span>(20<\/span>)\u00a0NOT<\/span>\u00a0NULL<\/span>\u00a0COMMENT<\/span>\u00a0'\u53f7\u6bb5\u7684\u957f\u5ea6'<\/span>,
        \u00a0\u00a0biz_type\u00a0\u00a0\u00a0\u00a0int<\/span>(20<\/span>)\u00a0NOT<\/span>\u00a0NULL<\/span>\u00a0COMMENT<\/span>\u00a0'\u4e1a\u52a1\u7c7b\u578b'<\/span>,
        \u00a0\u00a0version<\/span>\u00a0int<\/span>(20<\/span>)\u00a0NOT<\/span>\u00a0NULL<\/span>\u00a0COMMENT<\/span>\u00a0'\u7248\u672c\u53f7,\u662f\u4e00\u4e2a\u4e50\u89c2\u9501\uff0c\u6bcf\u6b21\u90fd\u66f4\u65b0version\uff0c\u4fdd\u8bc1\u5e76\u53d1\u65f6\u6570\u636e\u7684\u6b63\u786e\u6027'<\/span>,
        \u00a0\u00a0PRIMARY\u00a0KEY<\/span>\u00a0(`id`<\/span>)
        )\u00a0
        <\/code><\/pre>\n
        \u8fd9\u79cd\u5206\u5e03\u5f0fID\u751f\u6210\u65b9\u5f0f\u4e0d\u5f3a\u4f9d\u8d56\u4e8e\u6570\u636e\u5e93\uff0c\u4e0d\u4f1a\u9891\u7e41\u7684\u8bbf\u95ee\u6570\u636e\u5e93\uff0c\u5bf9\u6570\u636e\u5e93\u7684\u538b\u529b\u5c0f\u5f88\u591a\u3002\u4f46\u540c\u6837\u4e5f\u4f1a\u5b58\u5728\u4e00\u4e9b\u7f3a\u70b9\u6bd4\u5982\uff1a\u670d\u52a1\u5668\u91cd\u542f\uff0c\u5355\u70b9\u6545\u969c\u4f1a\u9020\u6210ID\u4e0d\u8fde\u7eed\u3002<\/p>\n
        4\u3001Redis INCR<\/h2>\n
        \u57fa\u4e8e\u5168\u5c40\u552f\u4e00ID\u7684\u7279\u6027\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7Redis\u7684INCR\u547d\u4ee4\u6765\u751f\u6210\u5168\u5c40\u552f\u4e00ID\u3002<\/p>\n
        \"\u4e5d\u79cd\u5206\u5e03\u5f0fID\u89e3\u51b3\u65b9\u6848\uff0c\u603b\u6709\u4e00\u6b3e\u9002\u5408\u4f60\uff01\"
        Redis\u5206\u5e03\u5f0fID\u7684\u7b80\u5355\u6848\u4f8b<\/p>\n
        \/**
        \u00a0*\u00a0\u00a0Redis\u00a0\u5206\u5e03\u5f0fID\u751f\u6210\u5668
        \u00a0*\/<\/span>
        @Component<\/span>
        public<\/span>\u00a0class<\/span>\u00a0RedisDistributedId<\/span>\u00a0<\/span>{

        \u00a0\u00a0\u00a0\u00a0@Autowired<\/span>
        \u00a0\u00a0\u00a0\u00a0private<\/span>\u00a0StringRedisTemplate\u00a0redisTemplate;

        \u00a0\u00a0\u00a0\u00a0private<\/span>\u00a0static<\/span>\u00a0final<\/span>\u00a0long<\/span>\u00a0BEGIN_TIMESTAMP\u00a0=\u00a01659312000l<\/span>;

        \u00a0\u00a0\u00a0\u00a0\/**
        \u00a0\u00a0\u00a0\u00a0\u00a0*\u00a0\u751f\u6210\u5206\u5e03\u5f0fID
        \u00a0\u00a0\u00a0\u00a0\u00a0*\u00a0\u7b26\u53f7\u4f4d\u00a0\u00a0\u00a0\u00a0\u65f6\u95f4\u6233[31\u4f4d]\u00a0\u00a0\u81ea\u589e\u5e8f\u53f7\u301032\u4f4d\u3011
        \u00a0\u00a0\u00a0\u00a0\u00a0*\u00a0@param<\/span>\u00a0item
        \u00a0\u00a0\u00a0\u00a0\u00a0*\u00a0@return<\/span>
        \u00a0\u00a0\u00a0\u00a0\u00a0*\/<\/span>
        \u00a0\u00a0\u00a0\u00a0public<\/span>\u00a0long<\/span>\u00a0nextId<\/span>(String\u00a0item)<\/span><\/span>{
        \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/\u00a01.\u751f\u6210\u65f6\u95f4\u6233<\/span>
        \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0LocalDateTime\u00a0now\u00a0=\u00a0LocalDateTime.now();
        \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/\u00a0\u683c\u6797\u5a01\u6cbb\u65f6\u95f4\u5dee<\/span>
        \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0long<\/span>\u00a0nowSecond\u00a0=\u00a0now.toEpochSecond(ZoneOffset.UTC);
        \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/\u00a0\u6211\u4eec\u9700\u8981\u83b7\u53d6\u7684\u00a0\u65f6\u95f4\u6233\u00a0\u4fe1\u606f<\/span>
        \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0long<\/span>\u00a0timestamp\u00a0=\u00a0nowSecond\u00a0-\u00a0BEGIN_TIMESTAMP;
        \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/\u00a02.\u751f\u6210\u5e8f\u53f7\u00a0--\u300b\u00a0\u4eceRedis\u4e2d\u83b7\u53d6<\/span>
        \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/\u00a0\u5f53\u524d\u5f53\u524d\u7684\u65e5\u671f<\/span>
        \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0String\u00a0date\u00a0=\u00a0now.format(DateTimeFormatter.ofPattern(\"yyyy:MM:dd\"<\/span>));
        \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/\u00a0\u83b7\u53d6\u5bf9\u5e94\u7684\u81ea\u589e\u7684\u5e8f\u53f7<\/span>
        \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Long\u00a0increment\u00a0=\u00a0redisTemplate.opsForValue().increment(\"id:\"<\/span>\u00a0+\u00a0item\u00a0+\u00a0\":\"<\/span>\u00a0+\u00a0date);
        \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0return<\/span>\u00a0timestamp\u00a0<<\u00a032<\/span>\u00a0|\u00a0increment;
        \u00a0\u00a0\u00a0\u00a0}

        }
        <\/code><\/pre>\n
        \u540c\u6837\u4f7f\u7528Redis\u4e5f\u6709\u5bf9\u5e94\u7684\u7f3a\u70b9\uff1aID \u751f\u6210\u7684\u6301\u4e45\u5316\u95ee\u9898\uff0c\u5982\u679cRedis\u5b95\u673a\u4e86\u600e\u4e48\u8fdb\u884c\u6062\u590d?<\/p>\n
        5\u3001\u96ea\u82b1\u7b97\u6cd5<\/h2>\n
        Snowflake\uff0c\u96ea\u82b1\u7b97\u6cd5\u662f\u6709Twitter\u5f00\u6e90\u7684\u5206\u5e03\u5f0fID\u751f\u6210\u7b97\u6cd5\uff0c\u4ee5\u5212\u5206\u547d\u540d\u7a7a\u95f4\u7684\u65b9\u5f0f\u5c0664bit\u4f4d\u5206\u5272\u6210\u4e86\u591a\u4e2a\u90e8\u5206\uff0c\u6bcf\u4e2a\u90e8\u5206\u90fd\u6709\u5177\u4f53\u7684\u4e0d\u540c\u542b\u4e49\uff0c\u5728Java\u4e2d64Bit\u4f4d\u7684\u6574\u6570\u662fLong\u7c7b\u578b\uff0c\u6240\u4ee5\u5728Java\u4e2dSnowflake\u7b97\u6cd5\u751f\u6210\u7684ID\u5c31\u662flong\u6765\u5b58\u50a8\u7684\u3002\u5177\u4f53\u5982\u4e0b\uff1a<\/p>\n
        \"\u4e5d\u79cd\u5206\u5e03\u5f0fID\u89e3\u51b3\u65b9\u6848\uff0c\u603b\u6709\u4e00\u6b3e\u9002\u5408\u4f60\uff01\"