{"id":17507,"date":"2025-06-05T09:43:36","date_gmt":"2025-06-05T01:43:36","guid":{"rendered":"https:\/\/92it.top\/?p=17507"},"modified":"2025-06-05T09:43:36","modified_gmt":"2025-06-05T01:43:36","slug":"%e6%9e%b6%e6%9e%84%e5%b8%88%e5%bf%85%e7%9f%a5%e7%9a%8411%e7%a7%8dapi%e6%80%a7%e8%83%bd%e4%bc%98%e5%8c%96%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/92it.top\/?p=17507","title":{"rendered":"\u67b6\u6784\u5e08\u5fc5\u77e5\u768411\u79cdAPI\u6027\u80fd\u4f18\u5316\u65b9\u6cd5"},"content":{"rendered":"\n

\u8f6c\u8f7d\uff1a\u67b6\u6784\u5e08\u5fc5\u77e5\u768411\u79cdAPI\u6027\u80fd\u4f18\u5316\u65b9\u6cd5<\/a><\/p>\n\n\n\n

\u524d\u8a00<\/strong><\/p>\n\n\n\n

\n\n\n\n

\u63a5\u53e3\u6027\u80fd\u4f18\u5316\u662f\u540e\u7aef\u5f00\u53d1\u4eba\u5458\u7ecf\u5e38\u78b0\u5230\u7684\u4e00\u9053\u9762\u8bd5\u9898\uff0c\u56e0\u4e3a\u5b83\u662f\u4e00\u4e2a\u8ddf\u5f00\u53d1\u8bed\u8a00\u65e0\u5173\u7684\u516c\u5171\u95ee\u9898\u3002<\/p>\n\n\n\n

\u8fd9\u4e2a\u95ee\u9898\u65e2\u53ef\u4ee5\u5f88\u7b80\u5355\uff0c\u4e5f\u53ef\u4ee5\u76f8\u5f53\u590d\u6742\u3002<\/p>\n\n\n\n

\u6709\u65f6\u5019\uff0c\u53ea\u9700\u8981\u6dfb\u52a0\u4e00\u4e2a\u7d22\u5f15\u5c31\u80fd\u89e3\u51b3\u3002
\u6709\u65f6\u5019\uff0c\u4ee3\u7801\u9700\u8981\u8fdb\u884c\u91cd\u6784\u3002
\u6709\u65f6\u5019\uff0c\u5fc5\u987b\u589e\u52a0\u7f13\u5b58\u3002
\u6709\u65f6\u5019\uff0c\u9700\u8981\u5f15\u5165\u4e00\u4e9b\u4e2d\u95f4\u4ef6\uff0c\u4f8b\u5982\u6d88\u606f\u961f\u5217\uff08MQ\uff09\u3002
\u6709\u65f6\u5019\uff0c\u9700\u8fdb\u884c\u5206\u5e93\u5206\u8868\u3002
\u6709\u65f6\u5019\uff0c\u9700\u8981\u62c6\u5206\u670d\u52a1\u3002
\u7b49\u7b49\u3002<\/pre>\n\n\n\n
\u5bfc\u81f4\u63a5\u53e3\u6027\u80fd\u95ee\u9898\u7684\u539f\u56e0\u591a\u79cd\u591a\u6837\uff0c\u4e0d\u540c\u9879\u76ee\u7684\u4e0d\u540c\u63a5\u53e3\uff0c\u5176\u539f\u56e0\u53ef\u80fd\u5404\u4e0d\u76f8\u540c\u3002<\/p>\n\n\n\n
\u4e00\u3001\u7d22\u5f15\u4f18\u5316<\/strong><\/p>\n\n\n\n
\n\n\n\n
\u63a5\u53e3\u6027\u80fd\u4f18\u5316\u65f6\uff0c\u5927\u5bb6\u7b2c\u4e00\u4e2a\u60f3\u5230\u7684\u901a\u5e38\u662f\uff1a\u4f18\u5316\u7d22\u5f15\u3002<\/p>\n\n\n\n
\u786e\u5b9e\uff0c\u4f18\u5316\u7d22\u5f15\u7684\u6210\u672c\u662f\u6700\u5c0f\u7684\u3002<\/p>\n\n\n\n
\u4f60\u53ef\u4ee5\u901a\u8fc7\u67e5\u770b\u7ebf\u4e0a\u65e5\u5fd7\u6216\u76d1\u63a7\u62a5\u544a\uff0c\u53d1\u73b0\u67d0\u4e2a\u63a5\u53e3\u4f7f\u7528\u7684\u67d0\u6761SQL\u8bed\u53e5\u8017\u65f6\u8f83\u957f\u3002<\/p>\n\n\n\n
\u6b64\u65f6\uff0c\u4f60\u53ef\u80fd\u4f1a\u6709\u4ee5\u4e0b\u7591\u95ee\uff1a<\/p>\n\n\n\n
\u8fd9\u6761SQL\u8bed\u53e5\u662f\u5426\u5df2\u7ecf\u52a0\u4e86\u7d22\u5f15\uff1f
\u52a0\u7684\u7d22\u5f15\u662f\u5426\u751f\u6548\u4e86\uff1f
MySQL\u662f\u5426\u9009\u62e9\u4e86\u9519\u8bef\u7684\u7d22\u5f15\uff1f<\/pre>\n\n\n\n
1.1 \u6ca1\u52a0\u7d22\u5f15<\/strong><\/p>\n\n\n\n
\u5728SQL\u8bed\u53e5\u4e2d\uff0c\u5fd8\u8bb0\u4e3aWHERE\u6761\u4ef6\u7684\u5173\u952e\u5b57\u6bb5\u6216ORDER BY\u540e\u7684\u6392\u5e8f\u5b57\u6bb5\u52a0\u7d22\u5f15\u662f\u9879\u76ee\u4e2d\u5e38\u89c1\u7684\u95ee\u9898\u3002<\/p>\n\n\n\n
\u5728\u9879\u76ee\u521d\u671f\uff0c\u7531\u4e8e\u8868\u4e2d\u7684\u6570\u636e\u91cf\u8f83\u5c0f\uff0c\u52a0\u4e0d\u52a0\u7d22\u5f15\u5bf9SQL\u67e5\u8be2\u6027\u80fd\u5f71\u54cd\u4e0d\u5927\u3002<\/p>\n\n\n\n
\u7136\u800c\uff0c\u968f\u7740\u4e1a\u52a1\u7684\u53d1\u5c55\uff0c\u8868\u4e2d\u7684\u6570\u636e\u91cf\u4e0d\u65ad\u589e\u52a0\uff0c\u8fd9\u65f6\u5c31\u5fc5\u987b\u52a0\u7d22\u5f15\u4e86\u3002<\/p>\n\n\n\n
\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u547d\u4ee4\u67e5\u770b\/\u6dfb\u52a0\u7d22\u5f15\uff1a<\/p>\n\n\n\n
show index from `table_name`\nCREATE INDEX index_name ON table_name (column_name);<\/pre>\n\n\n\n
\u8fd9\u79cd\u65b9\u5f0f\u80fd\u591f\u663e\u8457\u63d0\u9ad8\u67e5\u8be2\u6027\u80fd\uff0c\u5c24\u5176\u662f\u5728\u6570\u636e\u91cf\u5e9e\u5927\u7684\u60c5\u51b5\u4e0b\u3002<\/p>\n\n\n\n
1.2 \u7d22\u5f15\u6ca1\u751f\u6548<\/strong><\/p>\n\n\n\n
\u901a\u8fc7\u4e0a\u8ff0\u547d\u4ee4\u6211\u4eec\u5df2\u7ecf\u786e\u8ba4\u7d22\u5f15\u662f\u5b58\u5728\u7684\uff0c\u4f46\u5b83\u662f\u5426\u751f\u6548\u5462\uff1f<\/p>\n\n\n\n
\u6b64\u65f6\uff0c\u4f60\u53ef\u80fd\u4f1a\u6709\u8fd9\u6837\u7684\u7591\u95ee\u3002<\/p>\n\n\n\n
\u90a3\u4e48\uff0c\u5982\u4f55\u67e5\u770b\u7d22\u5f15\u662f\u5426\u751f\u6548\u5462\uff1f<\/pre>\n\n\n\n
\u7b54\u6848\u662f\uff1a\u53ef\u4ee5\u4f7f\u7528 EXPLAIN<\/strong> \u547d\u4ee4\uff0c\u67e5\u770b MySQL<\/strong> \u7684\u6267\u884c\u8ba1\u5212\uff0c\u5b83\u4f1a\u663e\u793a\u7d22\u5f15\u7684\u4f7f\u7528\u60c5\u51b5\u3002<\/p>\n\n\n\n
\u4f8b\u5982\uff1a<\/p>\n\n\n\n
EXPLAIN SELECT * FROM `order` WHERE code='002';<\/pre>\n\n\n\n
\u7ed3\u679c\uff1a<\/p>\n\n\n
\n
\"\"<\/figure><\/div>\n\n\n
\u8fd9\u4e2a\u547d\u4ee4\u5c06\u663e\u793a\u67e5\u8be2\u7684\u6267\u884c\u8ba1\u5212\uff0c\u5305\u62ec\u4f7f\u7528\u4e86\u54ea\u4e9b\u7d22\u5f15\u3002<\/p>\n\n\n\n
\u5982\u679c\u7d22\u5f15\u751f\u6548\uff0c\u4f60\u4f1a\u5728\u8f93\u51fa\u7ed3\u679c\u4e2d\u770b\u5230\u76f8\u5173\u7684\u4fe1\u606f\u3002<\/p>\n\n\n\n
\u901a\u8fc7\u8fd9\u51e0\u5217\u53ef\u4ee5\u5224\u65ad\u7d22\u5f15\u4f7f\u7528\u60c5\u51b5\uff0c\u6267\u884c\u8ba1\u5212\u5305\u542b\u5217\u7684\u542b\u4e49\u5982\u4e0b\u56fe\u6240\u793a\uff1a<\/p>\n\n\n
\n
\"\"<\/figure><\/div>\n\n\n
\u8bf4\u5b9e\u8bdd\uff0cSQL\u8bed\u53e5\u6ca1\u6709\u4f7f\u7528\u7d22\u5f15\uff0c\u9664\u53bb\u6ca1\u6709\u5efa\u7d22\u5f15\u7684\u60c5\u51b5\u5916\uff0c\u6700\u5927\u7684\u53ef\u80fd\u6027\u662f\u7d22\u5f15\u5931\u6548\u4e86\u3002<\/p>\n\n\n\n
\u4ee5\u4e0b\u662f\u7d22\u5f15\u5931\u6548\u7684\u5e38\u89c1\u539f\u56e0\uff1a<\/p>\n\n\n
\n
\"\"<\/figure><\/div>\n\n\n
\u4e86\u89e3\u8fd9\u4e9b\u539f\u56e0\uff0c\u53ef\u4ee5\u5e2e\u52a9\u4f60\u5728\u67e5\u8be2\u4f18\u5316\u65f6\u907f\u514d\u7d22\u5f15\u5931\u6548\u7684\u95ee\u9898\uff0c\u786e\u4fdd\u6570\u636e\u5e93\u67e5\u8be2\u6027\u80fd\u4fdd\u6301\u6700\u4f73\u3002<\/p>\n\n\n\n
1.3 \u9009\u9519\u7d22\u5f15<\/strong><\/p>\n\n\n\n
\u6b64\u5916\uff0c\u4f60\u662f\u5426\u9047\u5230\u8fc7\u8fd9\u6837\u4e00\u79cd\u60c5\u51b5\uff1a\u660e\u660e\u662f\u540c\u4e00\u6761SQL\u8bed\u53e5\uff0c\u53ea\u662f\u5165\u53c2\u4e0d\u540c\u3002<\/p>\n\n\n\n
\u6709\u65f6\u5019\u4f7f\u7528\u7684\u662f\u7d22\u5f15A\uff0c\u6709\u65f6\u5019\u5374\u4f7f\u7528\u7d22\u5f15B\uff1f<\/p>\n\n\n\n
\u6ca1\u9519\uff0c\u6709\u65f6\u5019MySQL\u4f1a\u9009\u9519\u7d22\u5f15\u3002<\/pre>\n\n\n\n
\u5fc5\u8981\u65f6\u53ef\u4ee5\u4f7f\u7528 FORCE INDEX<\/strong> \u6765\u5f3a\u5236\u67e5\u8be2SQL\u4f7f\u7528\u67d0\u4e2a\u7d22\u5f15\u3002<\/p>\n\n\n\n
\u4f8b\u5982\uff1a<\/p>\n\n\n\n
SELECT * FROM `order` FORCE INDEX (index_name) WHERE code='002';<\/pre>\n\n\n\n
\u81f3\u4e8e\u4e3a\u4ec0\u4e48MySQL\u4f1a\u9009\u9519\u7d22\u5f15\uff0c\u539f\u56e0\u53ef\u80fd\u6709\u4ee5\u4e0b\u51e0\u70b9\uff1a<\/p>\n\n\n
\n
\"\"<\/figure><\/div>\n\n\n
\u4e86\u89e3\u8fd9\u4e9b\u539f\u56e0\uff0c\u53ef\u4ee5\u5e2e\u52a9\u4f60\u66f4\u597d\u5730\u7406\u89e3\u548c\u63a7\u5236MySQL\u7684\u7d22\u5f15\u9009\u62e9\u884c\u4e3a\uff0c\u786e\u4fdd\u67e5\u8be2\u6027\u80fd\u7684\u7a33\u5b9a\u6027\u3002<\/p>\n\n\n\n
\u4e8c\u3001SQL\u4f18\u5316<\/strong><\/p>\n\n\n\n
\n\n\n\n
\u5982\u679c\u4f18\u5316\u4e86\u7d22\u5f15\u4e4b\u540e\u6548\u679c\u4e0d\u660e\u663e\uff0c\u63a5\u4e0b\u6765\u53ef\u4ee5\u5c1d\u8bd5\u4f18\u5316\u4e00\u4e0bSQL\u8bed\u53e5\uff0c\u56e0\u4e3a\u76f8\u5bf9\u4e8e\u4fee\u6539Java\u4ee3\u7801\u6765\u8bf4\uff0c\u6539\u9020SQL\u8bed\u53e5\u7684\u6210\u672c\u8981\u5c0f\u5f97\u591a\u3002<\/p>\n\n\n\n
\u4ee5\u4e0b\u662fSQL\u4f18\u5316\u768415\u4e2a\u5c0f\u6280\u5de7\uff1a<\/p>\n\n\n
\n
\"\"<\/figure><\/div>\n\n\n
\u4e09\u3001\u8fdc\u7a0b\u8c03\u7528<\/strong><\/p>\n\n\n\n
\n\n\n\n
\u591a\u65f6\u5019\uff0c\u6211\u4eec\u9700\u8981\u5728\u4e00\u4e2a\u63a5\u53e3\u4e2d\u8c03\u7528\u5176\u4ed6\u670d\u52a1\u7684\u63a5\u53e3\u3002<\/p>\n\n\n\n
\u4f8b\u5982\uff0c\u6709\u8fd9\u6837\u7684\u4e1a\u52a1\u573a\u666f\uff1a<\/p>\n\n\n\n
\u5728\u7528\u6237\u4fe1\u606f\u67e5\u8be2\u63a5\u53e3\u4e2d\u9700\u8981\u8fd4\u56de\u4ee5\u4e0b\u4fe1\u606f\uff1a\u7528\u6237\u540d\u79f0\u3001\u6027\u522b\u3001\u7b49\u7ea7\u3001\u5934\u50cf\u3001\u79ef\u5206\u548c\u6210\u957f\u503c\u3002<\/p>\n\n\n\n
\u5176\u4e2d\uff0c\u7528\u6237\u540d\u79f0\u3001\u6027\u522b\u3001\u7b49\u7ea7\u548c\u5934\u50cf\u5b58\u50a8\u5728\u7528\u6237\u670d\u52a1\u4e2d\uff0c\u79ef\u5206\u5b58\u50a8\u5728\u79ef\u5206\u670d\u52a1\u4e2d\uff0c\u6210\u957f\u503c\u5b58\u50a8\u5728\u6210\u957f\u503c\u670d\u52a1\u4e2d\u3002\u4e3a\u4e86\u5c06\u8fd9\u4e9b\u6570\u636e\u7edf\u4e00\u8fd4\u56de\uff0c\u6211\u4eec\u9700\u8981\u63d0\u4f9b\u4e00\u4e2a\u989d\u5916\u7684\u5bf9\u5916\u63a5\u53e3\u670d\u52a1\u3002<\/p>\n\n\n\n
\u56e0\u6b64\uff0c\u7528\u6237\u4fe1\u606f\u67e5\u8be2\u63a5\u53e3\u9700\u8981\u8c03\u7528\u7528\u6237\u67e5\u8be2\u63a5\u53e3\u3001\u79ef\u5206\u67e5\u8be2\u63a5\u53e3\u548c\u6210\u957f\u503c\u67e5\u8be2\u63a5\u53e3\uff0c\u7136\u540e\u5c06\u6570\u636e\u6c47\u603b\u5e76\u7edf\u4e00\u8fd4\u56de\u3002<\/p>\n\n\n\n
\u8c03\u7528\u8fc7\u7a0b\u5982\u4e0b\u56fe\u6240\u793a\uff1a<\/p>\n\n\n
\n
\"\"<\/figure><\/div>\n\n\n
\u8c03\u7528\u8fdc\u7a0b\u63a5\u53e3\u603b\u8017\u65f6 530ms = 200ms + 150ms + 180ms<\/p>\n\n\n\n
\u663e\u7136\u8fd9\u79cd\u4e32\u884c\u8c03\u7528\u8fdc\u7a0b\u63a5\u53e3\u6027\u80fd\u662f\u975e\u5e38\u4e0d\u597d\u7684\uff0c\u8c03\u7528\u8fdc\u7a0b\u63a5\u53e3\u603b\u7684\u8017\u65f6\u4e3a\u6240\u6709\u7684\u8fdc\u7a0b\u63a5\u53e3\u8017\u65f6\u4e4b\u548c\u3002<\/p>\n\n\n\n
\u90a3\u4e48\u5982\u4f55\u4f18\u5316\u8fdc\u7a0b\u63a5\u53e3\u6027\u80fd\u5462\uff1f<\/p>\n\n\n\n
3.1 \u4e32\u884c\u6539\u5e76\u884c<\/strong><\/p>\n\n\n\n
\u4e0a\u9762\u8bf4\u5230\uff0c\u65e2\u7136\u4e32\u884c\u8c03\u7528\u591a\u4e2a\u8fdc\u7a0b\u63a5\u53e3\u6027\u80fd\u5f88\u5dee\uff0c\u4e3a\u4ec0\u4e48\u4e0d\u6539\u6210\u5e76\u884c\u5462\uff1f<\/p>\n\n\n\n
\u5982\u4e0b\u56fe\u6240\u793a\uff1a<\/p>\n\n\n
\n
\"\"<\/figure><\/div>\n\n\n
\u8c03\u7528\u8fdc\u7a0b\u63a5\u53e3\u7684\u603b\u8017\u65f6\u4e3a200ms\uff0c\u8fd9\u7b49\u4e8e\u8017\u65f6\u6700\u957f\u7684\u90a3\u6b21\u8fdc\u7a0b\u63a5\u53e3\u8c03\u7528\u65f6\u95f4\u3002<\/p>\n\n\n\n
\u5728Java 8\u4e4b\u524d\uff0c\u53ef\u4ee5\u901a\u8fc7\u5b9e\u73b0Callable\u63a5\u53e3\u6765\u83b7\u53d6\u7ebf\u7a0b\u7684\u8fd4\u56de\u7ed3\u679c\u3002<\/p>\n\n\n\n
\u5728Java 8\u4e4b\u540e\uff0c\u53ef\u4ee5\u901a\u8fc7CompletableFuture\u7c7b\u6765\u5b9e\u73b0\u8fd9\u4e00\u529f\u80fd\u3002<\/p>\n\n\n\n
\u4ee5\u4e0b\u662f\u4e00\u4e2a\u4f7f\u7528CompletableFuture\u7684\u793a\u4f8b\uff1a<\/p>\n\n\n\n
public class RemoteServiceExample {\n    public static void main(String[] args) throws ExecutionException, InterruptedException {\n        \/\/ \u8c03\u7528\u7528\u6237\u670d\u52a1\u63a5\u53e3\n        CompletableFuture<String> userFuture = CompletableFuture.supplyAsync(() -> {\n            \/\/ \u6a21\u62df\u8fdc\u7a0b\u8c03\u7528\n            simulateDelay(200);\n            return \"User Info\";\n        });\n        \/\/ \u8c03\u7528\u79ef\u5206\u670d\u52a1\u63a5\u53e3\n        CompletableFuture<String> pointsFuture = CompletableFuture.supplyAsync(() -> {\n            \/\/ \u6a21\u62df\u8fdc\u7a0b\u8c03\u7528\n            simulateDelay(150);\n            return \"Points Info\";\n        });\n        \/\/ \u8c03\u7528\u6210\u957f\u503c\u670d\u52a1\u63a5\u53e3\n        CompletableFuture<String> growthFuture = CompletableFuture.supplyAsync(() -> {\n            \/\/ \u6a21\u62df\u8fdc\u7a0b\u8c03\u7528\n            simulateDelay(100);\n            return \"Growth Info\";\n        });\n        \/\/ \u6c47\u603b\u7ed3\u679c\n        CompletableFuture<Void> allOf = CompletableFuture.allOf(userFuture, pointsFuture, growthFuture);\n        \/\/ \u7b49\u5f85\u6240\u6709\u5f02\u6b65\u64cd\u4f5c\u5b8c\u6210\n        allOf.join();\n        \/\/ \u83b7\u53d6\u7ed3\u679c\n        String userInfo = userFuture.get();\n        String pointsInfo = pointsFuture.get();\n        String growthInfo = growthFuture.get();\n    }\n}\n<\/pre>\n\n\n\n
3.2 \u6570\u636e\u5f02\u6784<\/strong><\/p>\n\n\n\n
\u4e3a\u4e86\u63d0\u5347\u63a5\u53e3\u6027\u80fd\uff0c\u5c24\u5176\u5728\u9ad8\u5e76\u53d1\u573a\u666f\u4e0b\uff0c\u53ef\u4ee5\u8003\u8651\u6570\u636e\u5197\u4f59\uff0c\u5c06\u7528\u6237\u4fe1\u606f\u3001\u79ef\u5206\u548c\u6210\u957f\u503c\u7684\u6570\u636e\u7edf\u4e00\u5b58\u50a8\u5728\u4e00\u4e2a\u5730\u65b9\uff0c\u6bd4\u5982Redis\u3002<\/p>\n\n\n\n
\u8fd9\u6837\uff0c\u901a\u8fc7\u7528\u6237ID\u53ef\u4ee5\u76f4\u63a5\u4eceRedis\u4e2d\u67e5\u8be2\u6240\u9700\u7684\u6570\u636e\uff0c\u4ece\u800c\u907f\u514d\u8fdc\u7a0b\u63a5\u53e3\u8c03\u7528<\/p>\n\n\n
\n
\"\"<\/figure><\/div>\n\n\n
\u4f46\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u5982\u679c\u4f7f\u7528\u4e86\u6570\u636e\u5f02\u6784\u65b9\u6848\uff0c\u5c31\u53ef\u80fd\u4f1a\u51fa\u73b0\u6570\u636e\u4e00\u81f4\u6027\u95ee\u9898\u3002<\/p>\n\n\n\n
\u7528\u6237\u4fe1\u606f\u3001\u79ef\u5206\u548c\u6210\u957f\u503c\u6709\u66f4\u65b0\u7684\u8bdd\uff0c\u5927\u90e8\u5206\u60c5\u51b5\u4e0b\uff0c\u4f1a\u5148\u66f4\u65b0\u5230\u6570\u636e\u5e93\uff0c\u7136\u540e\u540c\u6b65\u5230redis\u3002<\/p>\n\n\n\n
\u4f46\u8fd9\u79cd\u8de8\u5e93\u7684\u64cd\u4f5c\uff0c\u53ef\u80fd\u4f1a\u5bfc\u81f4\u4e24\u8fb9\u6570\u636e\u4e0d\u4e00\u81f4\u7684\u60c5\u51b5\u4ea7\u751f\u3002<\/p>\n\n\n\n
\u56db\u3001\u91cd\u590d\u8c03\u7528<\/strong><\/p>\n\n\n\n
\n\n\n\n
\u5728\u6211\u4eec\u7684\u65e5\u5e38\u5de5\u4f5c\u4ee3\u7801\u4e2d\uff0c\u91cd\u590d\u8c03\u7528\u975e\u5e38\u5e38\u89c1\uff0c\u4f46\u5982\u679c\u6ca1\u6709\u63a7\u5236\u597d\uff0c\u4f1a\u4e25\u91cd\u5f71\u54cd\u63a5\u53e3\u7684\u6027\u80fd\u3002<\/p>\n\n\n\n
\u8ba9\u6211\u4eec\u4e00\u8d77\u6765\u770b\u770b\u8fd9\u4e2a\u95ee\u9898\u3002<\/p>\n\n\n\n
4.1 \u5faa\u73af\u67e5\u6570\u636e\u5e93 \u6709\u65f6\u5019\uff0c\u6211\u4eec\u9700\u8981\u4ece\u6307\u5b9a\u7684\u7528\u6237\u96c6\u5408\u4e2d\u67e5\u8be2\u51fa\u54ea\u4e9b\u7528\u6237\u5df2\u7ecf\u5b58\u5728\u4e8e\u6570\u636e\u5e93\u4e2d\u3002<\/p>\n\n\n\n
\u4e00\u79cd\u5b9e\u73b0\u65b9\u5f0f\u5982\u4e0b\uff1a<\/p>\n\n\n\n
public List<User> findExistingUsers(List<String> userIds) {\n    List<User> existingUsers = new ArrayList<>();\n    for (String userId : userIds) {\n        User user = userRepository.findById(userId);\n        if (user != null) {\n            existingUsers.add(user);\n        }\n    }\n    return existingUsers;\n}<\/pre>\n\n\n\n
\u4e0a\u8ff0\u4ee3\u7801\u4f1a\u5bf9\u6bcf\u4e2a\u7528\u6237ID\u6267\u884c\u4e00\u6b21\u6570\u636e\u5e93\u67e5\u8be2\uff0c\u8fd9\u5728\u7528\u6237\u96c6\u5408\u8f83\u5927\u65f6\u4f1a\u5bfc\u81f4\u6027\u80fd\u95ee\u9898\u3002<\/p>\n\n\n\n
\u90a3\u4e48\uff0c\u6211\u4eec\u5982\u4f55\u4f18\u5316\u5462\uff1f<\/pre>\n\n\n\n
\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u6279\u91cf\u67e5\u8be2\u6765\u4f18\u5316\u6027\u80fd\uff0c\u51cf\u5c11\u6570\u636e\u5e93\u7684\u67e5\u8be2\u6b21\u6570\u3002<\/p>\n\n\n\n
public List<User> findExistingUsers(List<String> userIds) {\n    \/\/ \u6279\u91cf\u67e5\u8be2\u6570\u636e\u5e93\n    List<User> users = userRepository.findByIds(userIds);\n    return users;\n}<\/pre>\n\n\n\n
\u8fd9\u91cc\u6709\u4e2a\u9700\u8981\u6ce8\u610f\u7684\u5730\u65b9\u662f\uff1aid\u96c6\u5408\u7684\u5927\u5c0f\u8981\u505a\u9650\u5236\uff0c\u6700\u597d\u4e00\u6b21\u4e0d\u8981\u8bf7\u6c42\u592a\u591a\u7684\u6570\u636e\u3002\u8981\u6839\u636e\u5b9e\u9645\u60c5\u51b5\u800c\u5b9a\uff0c\u5efa\u8bae\u63a7\u5236\u6bcf\u6b21\u8bf7\u6c42\u7684\u8bb0\u5f55\u6761\u6570\u5728500\u4ee5\u5185\u3002<\/pre>\n\n\n\n
\u4e94\u3001\u5f02\u6b65\u5904\u7406<\/strong><\/p>\n\n\n\n
\n\n\n\n
\u5728\u8fdb\u884c\u63a5\u53e3\u6027\u80fd\u4f18\u5316\u65f6\uff0c\u6709\u65f6\u5019\u9700\u8981\u91cd\u65b0\u68b3\u7406\u4e1a\u52a1\u903b\u8f91\uff0c\u68c0\u67e5\u662f\u5426\u5b58\u5728\u8bbe\u8ba1\u4e0d\u5408\u7406\u7684\u5730\u65b9\u3002<\/p>\n\n\n\n
\u5047\u8bbe\u6709\u4e00\u4e2a\u7528\u6237\u8bf7\u6c42\u63a5\u53e3\uff0c\u9700\u8981\u6267\u884c\u4ee5\u4e0b\u64cd\u4f5c\uff1a<\/p>\n\n\n\n
    \n
  1. \u4e1a\u52a1\u64cd\u4f5c<\/li>\n\n\n\n
  2. \u53d1\u9001\u7ad9\u5185\u901a\u77e5<\/li>\n\n\n\n
  3. \u8bb0\u5f55\u64cd\u4f5c\u65e5\u5fd7 \u4e3a\u4e86\u5b9e\u73b0\u65b9\u4fbf\uff0c\u901a\u5e38\u4f1a\u5c06\u8fd9\u4e9b\u903b\u8f91\u653e\u5728\u63a5\u53e3\u4e2d\u540c\u6b65\u6267\u884c\uff0c\u4f46\u8fd9\u4f1a\u5bf9\u63a5\u53e3\u6027\u80fd\u9020\u6210\u4e00\u5b9a\u5f71\u54cd\u3002<\/li>\n<\/ol>\n\n\n
    \n
    \"\"<\/figure><\/div>\n\n\n
    \u8fd9\u4e2a\u63a5\u53e3\u8868\u9762\u4e0a\u770b\u8d77\u6765\u6ca1\u6709\u95ee\u9898\uff0c\u4f46\u5982\u679c\u4f60\u4ed4\u7ec6\u68b3\u7406\u4e00\u4e0b\u4e1a\u52a1\u903b\u8f91\uff0c\u4f1a\u53d1\u73b0\u53ea\u6709\u4e1a\u52a1\u64cd\u4f5c\u624d\u662f\u6838\u5fc3\u903b\u8f91\uff0c\u5176\u4ed6\u7684\u529f\u80fd\u90fd\u662f\u975e\u6838\u5fc3\u903b\u8f91\u3002<\/p>\n\n\n\n
    \u5728\u8fd9\u91cc\u6709\u4e2a\u539f\u5219\u5c31\u662f\uff1a<\/p>\n\n\n\n
    \u6838\u5fc3\u903b\u8f91\u53ef\u4ee5\u540c\u6b65\u6267\u884c\uff0c\u540c\u6b65\u5199\u5e93\u3002\u975e\u6838\u5fc3\u903b\u8f91\uff0c\u53ef\u4ee5\u5f02\u6b65\u6267\u884c\uff0c\u5f02\u6b65\u5199\u5e93\u3002<\/pre>\n\n\n\n
    \u4e0a\u9762\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u53d1\u7ad9\u5185\u901a\u77e5\u548c\u7528\u6237\u64cd\u4f5c\u65e5\u5fd7\u529f\u80fd\uff0c\u5bf9\u5b9e\u65f6\u6027\u8981\u6c42\u4e0d\u9ad8\uff0c\u5373\u4f7f\u665a\u70b9\u5199\u5e93\uff0c\u7528\u6237\u65e0\u975e\u662f\u665a\u70b9\u6536\u5230\u7ad9\u5185\u901a\u77e5\uff0c\u6216\u8005\u8fd0\u8425\u665a\u70b9\u770b\u5230\u7528\u6237\u64cd\u4f5c\u65e5\u5fd7\uff0c\u5bf9\u4e1a\u52a1\u5f71\u54cd\u4e0d\u5927\uff0c\u6240\u4ee5\u5b8c\u5168\u53ef\u4ee5\u5f02\u6b65\u5904\u7406\u3002<\/p>\n\n\n\n
    \u5f02\u6b65\u5904\u7406\u65b9\u6848<\/p>\n\n\n\n
    \u5f02\u6b65\u5904\u7406\u901a\u5e38\u6709\u4e24\u79cd\u4e3b\u8981\u65b9\u5f0f\uff1a\u591a\u7ebf\u7a0b\u548c\u6d88\u606f\u961f\u5217\uff08MQ\uff09<\/pre>\n\n\n\n
    5.1 \u7ebf\u7a0b\u6c60\u5f02\u6b65\u4f18\u5316<\/strong><\/p>\n\n\n\n
    \u4f7f\u7528\u7ebf\u7a0b\u6c60\u6539\u9020\u4e4b\u540e\uff0c\u63a5\u53e3\u903b\u8f91\u5982\u4e0b<\/p>\n\n\n
    \n
    \"\"<\/figure><\/div>\n\n\n
    5.2 MQ\u5f02\u6b65<\/strong><\/p>\n\n\n\n
    \u4f7f\u7528\u7ebf\u7a0b\u6c60\u6709\u4e2a\u5c0f\u95ee\u9898\u5c31\u662f\uff1a\u5982\u679c\u670d\u52a1\u5668\u91cd\u542f\u4e86\uff0c\u6216\u8005\u662f\u9700\u8981\u88ab\u6267\u884c\u7684\u529f\u80fd\u51fa\u73b0\u5f02\u5e38\u4e86\uff0c\u65e0\u6cd5\u91cd\u8bd5\uff0c\u4f1a\u4e22\u6570\u636e\u3002<\/p>\n\n\n\n
    \u4e3a\u4e86\u907f\u514d\u4f7f\u7528\u7ebf\u7a0b\u6c60\u5904\u7406\u5f02\u6b65\u4efb\u52a1\u65f6\u51fa\u73b0\u6570\u636e\u4e22\u5931\u7684\u95ee\u9898\uff0c\u53ef\u4ee5\u8003\u8651\u4f7f\u7528\u66f4\u52a0\u5065\u58ee\u548c\u53ef\u9760\u7684\u5f02\u6b65\u5904\u7406\u65b9\u6848\uff0c\u5982\u6d88\u606f\u961f\u5217\uff08MQ\uff09\u3002\u6d88\u606f\u961f\u5217\u4e0d\u4ec5\u53ef\u4ee5\u5f02\u6b65\u5904\u7406\u4efb\u52a1\uff0c\u8fd8\u80fd\u591f\u4fdd\u8bc1\u6d88\u606f\u7684\u6301\u4e45\u5316\u548c\u53ef\u9760\u6027\uff0c\u652f\u6301\u91cd\u8bd5\u673a\u5236\u3002<\/p>\n\n\n\n
    \u4f7f\u7528MQ\u6539\u9020\u4e4b\u540e\uff0c\u63a5\u53e3\u903b\u8f91\u5982\u4e0b<\/strong>\uff1a<\/p>\n\n\n
    \n
    \"\"<\/figure><\/div>\n\n\n
    \u516d\u3001\u907f\u514d\u5927\u4e8b\u52a1<\/strong><\/p>\n\n\n\n
    \n\n\n\n
    \u5f88\u591a\u5c0f\u4f19\u4f34\u5728\u4f7f\u7528Spring\u6846\u67b6\u5f00\u53d1\u9879\u76ee\u65f6\uff0c\u4e3a\u4e86\u65b9\u4fbf\uff0c\u559c\u6b22\u4f7f\u7528@Transactional\u6ce8\u89e3\u63d0\u4f9b\u4e8b\u52a1\u529f\u80fd\u3002<\/p>\n\n\n\n
    \u6ca1\u9519\uff0c\u4f7f\u7528@Transactional\u6ce8\u89e3\u8fd9\u79cd\u58f0\u660e\u5f0f\u4e8b\u52a1\u7684\u65b9\u5f0f\u63d0\u4f9b\u4e8b\u52a1\u529f\u80fd\uff0c\u786e\u5b9e\u80fd\u5c11\u5199\u5f88\u591a\u4ee3\u7801\uff0c\u63d0\u5347\u5f00\u53d1\u6548\u7387\u3002<\/p>\n\n\n\n
    \u4f46\u4e5f\u5bb9\u6613\u9020\u6210\u5927\u4e8b\u52a1\uff0c\u5f15\u53d1\u6027\u80fd\u7684\u95ee\u9898\u3002<\/p>\n\n\n
    \n
    \"\"<\/figure><\/div>\n\n\n
    \u90a3\u4e48\u6211\u4eec\u8be5\u5982\u4f55\u4f18\u5316\u5927\u4e8b\u52a1\u5462\uff1f<\/pre>\n\n\n\n
    \u4e3a\u4e86\u907f\u514d\u5927\u4e8b\u52a1\u5f15\u53d1\u7684\u95ee\u9898\uff0c\u53ef\u4ee5\u8003\u8651\u4ee5\u4e0b\u4f18\u5316\u5efa\u8bae\uff1a<\/p>\n\n\n\n
      \n
    1. \u5c11\u7528@Transactional\u6ce8\u89e3<\/li>\n\n\n\n
    2. \u5c06\u67e5\u8be2(select)\u65b9\u6cd5\u653e\u5230\u4e8b\u52a1\u5916<\/li>\n\n\n\n
    3. \u4e8b\u52a1\u4e2d\u907f\u514d\u8fdc\u7a0b\u8c03\u7528<\/li>\n\n\n\n
    4. \u4e8b\u52a1\u4e2d\u907f\u514d\u4e00\u6b21\u6027\u5904\u7406\u592a\u591a\u6570\u636e<\/li>\n\n\n\n
    5. \u6709\u4e9b\u529f\u80fd\u53ef\u4ee5\u975e\u4e8b\u52a1\u6267\u884c<\/li>\n\n\n\n
    6. \u6709\u4e9b\u529f\u80fd\u53ef\u4ee5\u5f02\u6b65\u5904\u7406<\/li>\n<\/ol>\n\n\n\n
      \u4e03\u3001\u9501\u7c92\u5ea6<\/strong><\/p>\n\n\n\n
      \n\n\n\n
      \u5728\u4e00\u4e9b\u4e1a\u52a1\u573a\u666f\u4e2d\uff0c\u4e3a\u4e86\u907f\u514d\u591a\u4e2a\u7ebf\u7a0b\u5e76\u53d1\u4fee\u6539\u540c\u4e00\u5171\u4eab\u6570\u636e\u800c\u5f15\u53d1\u6570\u636e\u5f02\u5e38\uff0c\u901a\u5e38\u6211\u4eec\u4f1a\u4f7f\u7528\u52a0\u9501\u7684\u65b9\u5f0f\u6765\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\u3002<\/p>\n\n\n\n
      \u7136\u800c\uff0c\u5982\u679c\u9501\u7684\u8bbe\u8ba1\u4e0d\u5f53\uff0c\u5bfc\u81f4\u9501\u7684\u7c92\u5ea6\u8fc7\u7c97\uff0c\u4e5f\u4f1a\u5bf9\u63a5\u53e3\u6027\u80fd\u4ea7\u751f\u663e\u8457\u7684\u8d1f\u9762\u5f71\u54cd\u3002<\/p>\n\n\n\n
      7.1 synchronized<\/strong><\/p>\n\n\n\n
      \u5728Java\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528synchronized\u5173\u952e\u5b57\u6765\u4e3a\u4ee3\u7801\u52a0\u9501\u3002<\/p>\n\n\n\n
      \u901a\u5e38\u6709\u4e24\u79cd\u5199\u6cd5\uff1a\u5728\u65b9\u6cd5\u4e0a\u52a0\u9501\u548c\u5728\u4ee3\u7801\u5757\u4e0a\u52a0\u9501\u3002<\/p>\n\n\n\n
      1. \u65b9\u6cd5\u4e0a\u52a0\u9501<\/strong><\/p>\n\n\n\n
      public synchronized void doSave(String fileUrl) {\n    mkdir();\n    uploadFile(fileUrl);\n    sendMessage(fileUrl);\n}<\/pre>\n\n\n\n
      \u5728\u65b9\u6cd5\u4e0a\u52a0\u9501\u7684\u76ee\u7684\u662f\u4e3a\u4e86\u9632\u6b62\u5e76\u53d1\u60c5\u51b5\u4e0b\u521b\u5efa\u76f8\u540c\u7684\u76ee\u5f55\uff0c\u907f\u514d\u7b2c\u4e8c\u6b21\u521b\u5efa\u5931\u8d25\u800c\u5f71\u54cd\u4e1a\u52a1\u529f\u80fd\u3002<\/p>\n\n\n\n
      \u4f46\u8fd9\u79cd\u76f4\u63a5\u5728\u65b9\u6cd5\u4e0a\u52a0\u9501\u7684\u65b9\u5f0f\uff0c\u9501\u7684\u7c92\u5ea6\u8f83\u7c97\u3002<\/p>\n\n\n\n
      \u56e0\u4e3adoSave\u65b9\u6cd5\u4e2d\u7684\u6587\u4ef6\u4e0a\u4f20\u548c\u6d88\u606f\u53d1\u9001\u5e76\u4e0d\u9700\u8981\u52a0\u9501\uff0c\u53ea\u6709\u521b\u5efa\u76ee\u5f55\u7684\u65b9\u6cd5\u9700\u8981\u52a0\u9501\u3002<\/p>\n\n\n\n
      \u6211\u4eec\u77e5\u9053\uff0c\u6587\u4ef6\u4e0a\u4f20\u64cd\u4f5c\u975e\u5e38\u8017\u65f6\uff0c\u5982\u679c\u5c06\u6574\u4e2a\u65b9\u6cd5\u52a0\u9501\uff0c\u90a3\u4e48\u9700\u8981\u7b49\u5230\u6574\u4e2a\u65b9\u6cd5\u6267\u884c\u5b8c\u4e4b\u540e\u624d\u80fd\u91ca\u653e\u9501\u3002<\/p>\n\n\n\n
      \u663e\u7136\uff0c\u8fd9\u4f1a\u5bfc\u81f4\u8be5\u65b9\u6cd5\u7684\u6027\u80fd\u4e0b\u964d\uff0c\u5f97\u4e0d\u507f\u5931\u3002<\/p>\n\n\n\n
      2. \u4ee3\u7801\u5757\u4e0a\u52a0\u9501<\/strong>\u6211\u4eec\u53ef\u4ee5\u5c06\u52a0\u9501\u6539\u5728\u4ee3\u7801\u5757\u4e0a\uff0c\u4ece\u800c\u7f29\u5c0f\u9501\u7684\u7c92\u5ea6\uff0c \u5982\u4e0b\uff1a<\/p>\n\n\n\n
      public void doSave(String path, String fileUrl) {\n    synchronized(this) {\n        if (!exists(path)) {\n            mkdir(path);\n        }\n    }\n    uploadFile(fileUrl);\n    sendMessage(fileUrl);\n}<\/pre>\n\n\n\n
      \u8fd9\u6837\u6539\u9020\u540e\uff0c\u9501\u7684\u7c92\u5ea6\u53d8\u5c0f\u4e86\uff0c\u53ea\u6709\u5e76\u53d1\u521b\u5efa\u76ee\u5f55\u65f6\u624d\u52a0\u9501\u3002<\/p>\n\n\n\n
      \u521b\u5efa\u76ee\u5f55\u662f\u4e00\u4e2a\u975e\u5e38\u5feb\u7684\u64cd\u4f5c\uff0c\u5373\u4f7f\u52a0\u9501\u5bf9\u63a5\u53e3\u6027\u80fd\u7684\u5f71\u54cd\u4e5f\u4e0d\u5927\u3002<\/p>\n\n\n\n
      \u6700\u91cd\u8981\u7684\u662f\uff0c\u5176\u4ed6\u7684\u6587\u4ef6\u4e0a\u4f20\u548c\u6d88\u606f\u53d1\u9001\u529f\u80fd\u4ecd\u7136\u53ef\u4ee5\u5e76\u53d1\u6267\u884c\u3002<\/p>\n\n\n\n
      \u591a\u8282\u70b9\u73af\u5883\u4e2d\u7684\u95ee\u9898 \u5728\u5355\u673a\u7248\u670d\u52a1\u4e2d\uff0c\u8fd9\u79cd\u505a\u6cd5\u6ca1\u6709\u95ee\u9898\u3002\u4f46\u5728\u751f\u4ea7\u73af\u5883\u4e2d\uff0c\u4e3a\u4e86\u4fdd\u8bc1\u670d\u52a1\u7684\u7a33\u5b9a\u6027\uff0c\u540c\u4e00\u4e2a\u670d\u52a1\u901a\u5e38\u4f1a\u90e8\u7f72\u5728\u591a\u4e2a\u8282\u70b9\u4e0a\u3002\u5982\u679c\u67d0\u4e2a\u8282\u70b9\u6302\u6389\uff0c\u5176\u4ed6\u8282\u70b9\u7684\u670d\u52a1\u4ecd\u7136\u53ef\u7528\u3002<\/p>\n\n\n\n
      \u591a\u8282\u70b9\u90e8\u7f72\u907f\u514d\u4e86\u67d0\u4e2a\u8282\u70b9\u6302\u6389\u5bfc\u81f4\u670d\u52a1\u4e0d\u53ef\u7528\u7684\u60c5\u51b5\uff0c\u540c\u65f6\u4e5f\u80fd\u5206\u644a\u6574\u4e2a\u7cfb\u7edf\u7684\u6d41\u91cf\uff0c\u907f\u514d\u7cfb\u7edf\u538b\u529b\u8fc7\u5927\u3002<\/p>\n\n\n\n
      \u4f46\u8fd9\u79cd\u90e8\u7f72\u65b9\u5f0f\u4e5f\u5e26\u6765\u4e86\u65b0\u7684\u95ee\u9898\uff1asynchronized\u53ea\u80fd\u4fdd\u8bc1\u4e00\u4e2a\u8282\u70b9\u52a0\u9501\u6709\u6548\u3002<\/p>\n\n\n\n
      \u5982\u679c\u6709\u591a\u4e2a\u8282\u70b9\uff0c\u5982\u4f55\u52a0\u9501\u5462\uff1f<\/pre>\n\n\n\n
      7.2 Redis\u5206\u5e03\u5f0f\u9501<\/strong><\/p>\n\n\n\n
      \u5728\u5206\u5e03\u5f0f\u7cfb\u7edf\u4e2d\uff0c\u7531\u4e8eRedis\u5206\u5e03\u5f0f\u9501\u7684\u5b9e\u73b0\u76f8\u5bf9\u7b80\u5355\u4e14\u9ad8\u6548\uff0c\u56e0\u6b64\u5b83\u5728\u8bb8\u591a\u5b9e\u9645\u4e1a\u52a1\u573a\u666f\u4e2d\u88ab\u5e7f\u6cdb\u91c7\u7528\u3002<\/p>\n\n\n\n
      \u4f7f\u7528Redis\u5206\u5e03\u5f0f\u9501\u7684\u4f2a\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n\n\n\n
      public boolean doSave(String path, String fileUrl) {\n    try {\n        String result = jedis.set(lockKey, requestId, \"NX\", \"PX\", expireTime);\n        if (\"OK\".equals(result)) {\n            if (!exists(path)) {\n                mkdir(path);\n                uploadFile(fileUrl);\n                sendMessage(fileUrl);\n            }\n            return true;\n        }\n    } finally {\n        unlock(lockKey, requestId);\n    }\n    return false;\n}\n\n<\/pre>\n\n\n\n
      \u4e0e\u4e4b\u524d\u4f7f\u7528synchronized\u5173\u952e\u5b57\u52a0\u9501\u65f6\u4e00\u6837\uff0c\u8fd9\u91cc\u7684\u9501\u7684\u8303\u56f4\u4e5f\u592a\u5927\u4e86\uff0c\u6362\u53e5\u8bdd\u8bf4\uff0c\u9501\u7684\u7c92\u5ea6\u592a\u7c97\u3002\u8fd9\u4f1a\u5bfc\u81f4\u6574\u4e2a\u65b9\u6cd5\u7684\u6267\u884c\u6548\u7387\u5f88\u4f4e\u3002<\/p>\n\n\n\n
      \u5b9e\u9645\u4e0a\uff0c\u53ea\u6709\u5728\u521b\u5efa\u76ee\u5f55\u65f6\u624d\u9700\u8981\u52a0\u5206\u5e03\u5f0f\u9501\uff0c\u5176\u4f59\u4ee3\u7801\u4e0d\u9700\u8981\u52a0\u9501\u3002<\/p>\n\n\n\n
      \u4e8e\u662f\uff0c\u6211\u4eec\u9700\u8981\u4f18\u5316\u4ee3\u7801\uff1a<\/p>\n\n\n\n
      public void doSave(String path, String fileUrl) {\n    if (tryLock()) {\n        try {\n            if (!exists(path)) {\n                mkdir(path);\n            }\n        } finally {\n            unlock(lockKey, requestId);\n        }\n    }\n    uploadFile(fileUrl);\n    sendMessage(fileUrl);\n}\n\nprivate boolean tryLock() {\n    String result = jedis.set(lockKey, requestId, \"NX\", \"PX\", expireTime);\n    return \"OK\".equals(result);\n}\n\nprivate void unlock(String lockKey, String requestId) {\n    \/\/ \u89e3\u9501\u903b\u8f91\n}<\/pre>\n\n\n\n
      \u4e0a\u9762\u7684\u4ee3\u7801\u5c06\u52a0\u9501\u7684\u8303\u56f4\u7f29\u5c0f\u4e86\uff0c\u53ea\u6709\u5728\u521b\u5efa\u76ee\u5f55\u65f6\u624d\u52a0\u9501\u3002\u8fd9\u6837\u7684\u7b80\u5355\u4f18\u5316\u540e\uff0c\u63a5\u53e3\u6027\u80fd\u53ef\u4ee5\u5f97\u5230\u663e\u8457\u63d0\u5347\u3002<\/p>\n\n\n\n
      7.3 \u6570\u636e\u5e93\u9501<\/strong><\/p>\n\n\n\n
      MySQL\u6570\u636e\u5e93\u4e2d\u7684\u4e09\u79cd\u9501<\/strong><\/p>\n\n\n\n
        \n
      1. \u8868\u9501<\/strong>\uff1a\n