{"id":202271,"date":"2025-05-10T15:44:27","date_gmt":"2025-05-10T07:44:27","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202271\/"},"modified":"2025-05-10T15:44:27","modified_gmt":"2025-05-10T07:44:27","slug":"%e5%88%a9%e7%94%a8redis%e5%ae%9e%e7%8e%b0%e5%88%86%e5%b8%83%e5%bc%8f%e9%94%81%ef%bc%8c%e4%bf%9d%e9%9a%9c%e6%95%b0%e6%8d%ae%e5%ae%89%e5%85%a8","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202271\/","title":{"rendered":"\u5229\u7528Redis\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\uff0c\u4fdd\u969c\u6570\u636e\u5b89\u5168"},"content":{"rendered":"

<\/b> <\/p>\n

\u5229\u7528Redis\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\uff0c\u4fdd\u969c\u6570\u636e\u5b89\u5168<\/h1>\n

\u600e\u4e48\u5165\u95e8\u6570\u636e\u5e93\u7f16\u7a0b\uff1f\u9700\u8981\u5b66\u4e60\u54ea\u4e9b\u77e5\u8bc6\u70b9\uff1f\u8fd9\u662f\u65b0\u624b\u4eec\u521a\u63a5\u89e6\u7f16\u7a0b\u65f6\u5e38\u89c1\u7684\u95ee\u9898\uff1b\u4e0b\u9762golang\u5b66\u4e60\u7f51\u5c31\u6765\u7ed9\u5927\u5bb6\u6574\u7406\u5206\u4eab\u4e00\u4e9b\u77e5\u8bc6\u70b9\uff0c\u5e0c\u671b\u80fd\u591f\u7ed9\u521d\u5b66\u8005\u4e00\u4e9b\u5e2e\u52a9\u3002\u672c\u7bc7\u6587\u7ae0\u5c31\u6765\u4ecb\u7ecd\u300a\u5229\u7528Redis\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\uff0c\u4fdd\u969c\u6570\u636e\u5b89\u5168\u300b\uff0c\u6d89\u53ca\u5230\uff0c\u6709\u9700\u8981\u7684\u53ef\u4ee5\u6536\u85cf\u4e00\u4e0b<\/p>\n

\u968f\u7740\u4e92\u8054\u7f51\u6280\u672f\u7684\u4e0d\u65ad\u53d1\u5c55\uff0c\u5206\u5e03\u5f0f\u7cfb\u7edf\u5728\u5f00\u53d1\u4e2d\u8d8a\u6765\u8d8a\u666e\u904d\uff0c\u5c24\u5176\u662f\u5728\u9ad8\u5e76\u53d1\u5904\u7406\u3001\u5927\u89c4\u6a21\u6570\u636e\u5904\u7406\u573a\u666f\u4e2d\uff0c\u5206\u5e03\u5f0f\u7cfb\u7edf\u53ef\u4ee5\u63d0\u9ad8\u7cfb\u7edf\u7684\u53ef\u4f38\u7f29\u6027\uff0c\u63d0\u9ad8\u7cfb\u7edf\u7684\u6027\u80fd\u548c\u5e76\u53d1\u80fd\u529b\u3002\u4f46\u662f\uff0c\u5728\u5206\u5e03\u5f0f\u7cfb\u7edf\u4e2d\uff0c\u56e0\u4e3a\u6570\u636e\u5206\u6563\u5728\u591a\u53f0\u673a\u5668\u4e2d\uff0c\u5f88\u5bb9\u6613\u51fa\u73b0\u6570\u636e\u4e0d\u4e00\u81f4\u6216\u8005\u91cd\u590d\u64cd\u4f5c\u7b49\u95ee\u9898\u3002\u4e3a\u4e86\u89e3\u51b3\u8fd9\u4e9b\u95ee\u9898\uff0c\u6211\u4eec\u5e38\u5e38\u9700\u8981\u4f7f\u7528\u5206\u5e03\u5f0f\u9501\u3002<\/p>\n

\u5206\u5e03\u5f0f\u9501\u662f\u4e3a\u4e86\u4fdd\u6301\u5206\u5e03\u5f0f\u7cfb\u7edf\u7684\u6570\u636e\u4e00\u81f4\u6027\u800c\u63d0\u51fa\u7684\u4e00\u79cd\u9501\u673a\u5236\uff0c\u4e3b\u8981\u662f\u4e3a\u4e86\u907f\u514d\u5728\u5206\u5e03\u5f0f\u7cfb\u7edf\u4e2d\u51fa\u73b0\u6570\u636e\u7ade\u4e89\u3001\u6570\u636e\u4e0d\u4e00\u81f4\u7b49\u95ee\u9898\u3002\u5728\u4f20\u7edf\u7684\u5355\u673a\u9501\u673a\u5236\u4e2d\uff0c\u4e00\u822c\u4f7f\u7528synchronized\u6216\u8005ReentrantLock\u5b9e\u73b0\uff0c\u4f46\u5728\u5206\u5e03\u5f0f\u7cfb\u7edf\u4e2d\uff0c\u9501\u7684\u5b9e\u73b0\u65b9\u6848\u9700\u8981\u8003\u8651\u7f51\u7edc\u5ef6\u8fdf\u4ee5\u53ca\u5e76\u53d1\u91cf\u7b49\u95ee\u9898\uff0c\u8fd9\u5c31\u9700\u8981\u4f7f\u7528\u7279\u6b8a\u7684\u5206\u5e03\u5f0f\u9501\u6280\u672f\u3002<\/p>\n

Redis\u4f5c\u4e3a\u4e00\u4e2a\u9ad8\u6027\u80fd\u7684\u952e\u503c\u5b58\u50a8\u6570\u636e\u5e93\uff0c\u5e38\u5e38\u88ab\u7528\u6765\u5b9e\u73b0\u5206\u5e03\u5f0f\u7cfb\u7edf\u7684\u9501\u673a\u5236\u3002Redis\u63d0\u4f9b\u4e86\u591a\u79cd\u5206\u5e03\u5f0f\u9501\u5b9e\u73b0\u65b9\u5f0f\uff0c\u5982\u57fa\u4e8eSETNX\u547d\u4ee4\u5b9e\u73b0\u7684\u9501\u3001\u57fa\u4e8eRedlock\u7b97\u6cd5\u5b9e\u73b0\u7684\u9501\u3001\u57fa\u4e8eLua\u811a\u672c\u5b9e\u73b0\u7684\u9501\u7b49\u3002\u4e0b\u9762\uff0c\u6211\u4eec\u5c06\u4e3a\u5927\u5bb6\u4ecb\u7ecdRedis\u57fa\u4e8eSETNX\u547d\u4ee4\u5b9e\u73b0\u7684\u5206\u5e03\u5f0f\u9501\u5b9e\u73b0\u65b9\u6848\u3002<\/p>\n

Redis\u5206\u5e03\u5f0f\u9501\u5b9e\u73b0\u539f\u7406<\/h2>\n

Redis\u7684SETNX\u547d\u4ee4\u88ab\u7528\u6765\u5728Redis\u4e2d\u8bbe\u7f6e\u67d0\u4e2akey\u7684\u503c\uff0c\u5982\u679c\u8fd9\u4e2akey\u4e0d\u5b58\u5728\uff0c\u5c31\u8bbe\u7f6e\u6210\u529f\u5e76\u8fd4\u56de1\uff0c\u5426\u5219\u8bbe\u7f6e\u5931\u8d25\u5e76\u8fd4\u56de0\u3002\u6211\u4eec\u53ef\u4ee5\u5229\u7528\u8fd9\u4e2a\u7279\u6027\u6765\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\u3002<\/p>\n

\u5f53\u6211\u4eec\u9700\u8981\u5bf9\u67d0\u4e2a\u6570\u636e\u8fdb\u884c\u52a0\u9501\u65f6\uff0c\u6211\u4eec\u4f7f\u7528SETNX\u547d\u4ee4\u53bb\u5c1d\u8bd5\u8bbe\u7f6e\u67d0\u4e2akey\u7684\u503c\u4e3a1\u3002\u5982\u679c\u8bbe\u7f6e\u6210\u529f\uff0c\u8bf4\u660e\u5f53\u524d\u6ca1\u6709\u5176\u4ed6\u5ba2\u6237\u7aef\u6301\u6709\u8fd9\u4e2a\u9501\uff0c\u52a0\u9501\u6210\u529f\uff1b\u5982\u679c\u8bbe\u7f6e\u5931\u8d25\uff0c\u8bf4\u660e\u5f53\u524d\u6709\u5176\u4ed6\u5ba2\u6237\u7aef\u6301\u6709\u8fd9\u4e2a\u9501\uff0c\u52a0\u9501\u5931\u8d25\u3002\u5728\u5b9e\u73b0\u89e3\u9501\u65f6\uff0c\u6211\u4eec\u53ea\u9700\u8981\u5220\u9664\u8fd9\u4e2a\u9501\u5bf9\u5e94\u7684key\u5373\u53ef\u3002<\/p>\n

Redis\u5206\u5e03\u5f0f\u9501\u5b9e\u73b0\u6b65\u9aa4<\/h2>\n

\u4e0b\u9762\u6211\u4eec\u5c06\u4ecb\u7ecd\u5982\u4f55\u901a\u8fc7Redis\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\uff0c\u4fdd\u969c\u6570\u636e\u7684\u5b89\u5168\u3002\u4ee5\u4e0b\u6b65\u9aa4\u4ec5\u4e3a\u793a\u4f8b\uff0c\u5b9e\u9645\u5e94\u7528\u4e2d\u9700\u8981\u6839\u636e\u5177\u4f53\u60c5\u51b5\u8fdb\u884c\u8c03\u6574\u3002<\/p>\n

1.\u5f15\u5165Redis\u5ba2\u6237\u7aef<\/h3>\n

\u5728Java\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528Jedis\u6216\u8005Lettuce\u8fd9\u4e24\u4e2aRedis\u5ba2\u6237\u7aef\u5de5\u5177\u5305\u4e2d\u7684\u4efb\u610f\u4e00\u4e2a\u6765\u8fdb\u884cRedis\u76f8\u5173\u64cd\u4f5c\uff0c\u8fd9\u91cc\u6211\u4eec\u4ee5Jedis\u4e3a\u4f8b\u3002\u53ef\u4ee5\u5728pom.xml\u6587\u4ef6\u4e2d\u6dfb\u52a0\u5982\u4e0b\u4f9d\u8d56\uff1a<\/p>\n

<dependency>\n  <groupId>redis.clients<\/groupId>\n  <artifactId>jedis<\/artifactId>\n  <version>3.0.1<\/version>\n<\/dependency><\/pre>\n
2.\u521b\u5efaRedis\u8fde\u63a5<\/h3>\n
\u5728\u4f7f\u7528Redis\u4e4b\u524d\uff0c\u9700\u8981\u5148\u521b\u5efa\u4e0eRedis\u670d\u52a1\u7684\u8fde\u63a5\u3002\u53ef\u4ee5\u4f7f\u7528Jedis\u63d0\u4f9b\u7684JedisPool\u5bf9\u8c61\uff0cmaxTotal\u53c2\u6570\u6307\u5b9a\u4e86\u8fde\u63a5\u6c60\u4e2d\u6700\u5927\u7684\u8fde\u63a5\u6570\uff0cmaxIdle\u53c2\u6570\u6307\u5b9a\u4e86\u8fde\u63a5\u6c60\u4e2d\u6700\u5927\u7684\u7a7a\u95f2\u8fde\u63a5\u6570\uff0c\u8d85\u65f6\u65f6\u95f4\u8bbe\u7f6e\u4e3a5000\u6beb\u79d2\u3002<\/p>\n
JedisPool jedisPool = new JedisPool(new GenericObjectPoolConfig(),\n        \"localhost\",\n        6379, \n        5000, \n        \"password\");<\/pre>\n
3.\u52a0\u9501\u64cd\u4f5c<\/h3>\n
\u6211\u4eec\u901a\u8fc7\u5c01\u88c5\u4e00\u4e2aLockUtil\u7c7b\u6765\u5b9e\u73b0\u52a0\u9501\u548c\u89e3\u9501\u903b\u8f91\u3002\u5728\u52a0\u9501\u64cd\u4f5c\u4e2d\uff0c\u6211\u4eec\u5c1d\u8bd5\u4f7f\u7528SetNx\u547d\u4ee4\u6765\u8bbe\u7f6e\u67d0\u4e2akey\u7684\u503c\u4e3a1\uff0c\u5982\u679c\u8bbe\u7f6e\u6210\u529f\uff0c\u8fd4\u56detrue\uff1b\u5982\u679c\u8bbe\u7f6e\u5931\u8d25\uff0c\u8bf4\u660e\u9501\u5df2\u88ab\u5176\u4ed6\u7ebf\u7a0b\u5360\u7528\uff0c\u8fd4\u56defalse\u3002\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u5728\u52a0\u9501\u6210\u529f\u4e4b\u540e\uff0c\u5fc5\u987b\u8bbe\u7f6e\u4e00\u4e2a\u8d85\u65f6\u65f6\u95f4\uff0c\u907f\u514d\u56e0\u4e3a\u67d0\u4e9b\u539f\u56e0\u51fa\u73b0\u6b7b\u9501\u7684\u60c5\u51b5\u3002<\/p>\n
public class LockUtil {\n\n    private static final String LOCK_KEY_PREFIX = \"lock:\";\n\n    public static boolean lock(String key, int timeout) {\n        Jedis jedis = null;\n        try {\n            jedis = jedisPool.getResource();\n            String lockKey = LOCK_KEY_PREFIX + key;\n            long start = System.currentTimeMillis();\n            while (true) {\n                \/\/ \u4f7f\u7528SETNX\u547d\u4ee4\u6765\u8bbe\u7f6ekey\u7684\u503c\u4e3a1\n                long result = jedis.setnx(lockKey, \"1\");\n                \/\/ \u8bbe\u7f6e\u6210\u529f\n                if (result == 1) {\n                    jedis.expire(lockKey, timeout);\n                    return true;\n                }\n                \/\/ \u8bbe\u7f6e\u5931\u8d25\n                else {\n                    \/\/ \u68c0\u67e5\u662f\u5426\u8d85\u65f6\n                    long end = System.currentTimeMillis();\n                    if (end - start > timeout) {\n                        return false;\n                    }\n                }\n                Thread.sleep(1000);\n            }\n        } catch (Exception e) {\n            return false;\n        } finally {\n            if (jedis != null) {\n                jedis.close();\n            }\n        }\n    }\n}<\/pre>\n
4.\u89e3\u9501\u64cd\u4f5c<\/h3>\n
\u5728\u89e3\u9501\u64cd\u4f5c\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528del\u547d\u4ee4\u5c06key\u5220\u9664\uff0c\u5e76\u4e14\u91ca\u653e\u8d44\u6e90\u3002<\/p>\n
public class LockUtil {\n    \n    public static boolean unlock(String key) {\n        Jedis jedis = null;\n        try {\n            jedis = jedisPool.getResource();\n            String lockKey = LOCK_KEY_PREFIX + key;\n            jedis.del(lockKey);\n            return true;\n        } catch (Exception e) {\n            return false;\n        } finally {\n            if (jedis != null) {\n                jedis.close();\n            }\n        }\n    }\n}<\/pre>\n
5.\u6d4b\u8bd5<\/h3>\n
\u6700\u540e\uff0c\u901a\u8fc7\u4e00\u4e2a\u7b80\u5355\u7684\u6d4b\u8bd5\u6765\u9a8c\u8bc1\u6211\u4eec\u7684\u5206\u5e03\u5f0f\u9501\u662f\u5426\u53ef\u4ee5\u6b63\u5e38\u5de5\u4f5c\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n
@Test\npublic void testLock() throws InterruptedException {\n    ExecutorService executorService = Executors.newFixedThreadPool(10);\n    for (int i = 0; i < 10; i++) {\n        executorService.submit(new Runnable() {\n            @Override\n            public void run() {\n                boolean lockResult = LockUtil.lock(\"test\", 5000);\n                if (lockResult) {\n                    System.out.println(Thread.currentThread().getName() + \" get lock\");\n                    try {\n                        \/\/ \u5904\u7406\u4e1a\u52a1\n                        Thread.sleep(5000);\n                    } catch (InterruptedException e) {\n                        e.printStackTrace();\n                    } finally {\n                        LockUtil.unlock(\"test\");\n                    }\n                } else {\n                    System.out.println(Thread.currentThread().getName() + \" fail to get lock\");\n                }\n            }\n        });\n    }\n    sleep(100000);\n}<\/pre>\n
\u4e0a\u9762\u7684\u4ee3\u7801\u4f1a\u521b\u5efa10\u4e2a\u7ebf\u7a0b\uff0c\u6bcf\u4e2a\u7ebf\u7a0b\u5c1d\u8bd5\u83b7\u53d6\u540c\u4e00\u4e2akey\u7684\u9501\uff0c\u5e76\u4e14\u8fdb\u884c\u4e00\u4e9b\u4e1a\u52a1\u64cd\u4f5c\uff0c5\u79d2\u540e\u91ca\u653e\u9501\u8d44\u6e90\u3002\u5982\u679c\u5206\u5e03\u5f0f\u9501\u5b9e\u73b0\u6210\u529f\uff0c\u6bcf\u4e2a\u7ebf\u7a0b\u90fd\u80fd\u591f\u6210\u529f\u83b7\u53d6\u9501\uff0c\u5e76\u5b8c\u6210\u4e1a\u52a1\u5904\u7406\u3002<\/p>\n
\u901a\u8fc7\u4e0a\u8ff0\u793a\u4f8b\uff0c\u6211\u4eec\u53ef\u4ee5\u770b\u5230\uff0c\u5229\u7528Redis\u7684SETNX\u547d\u4ee4\uff0c\u53ef\u4ee5\u5b9e\u73b0\u4e00\u4e2a\u7b80\u5355\u3001\u9ad8\u6548\u7684\u5206\u5e03\u5f0f\u9501\u673a\u5236\uff0c\u6709\u6548\u5730\u4fdd\u969c\u5206\u5e03\u5f0f\u7cfb\u7edf\u4e2d\u6570\u636e\u7684\u5b89\u5168\u3002\u5728\u5b9e\u9645\u5e94\u7528\u8fc7\u7a0b\u4e2d\uff0c\u6211\u4eec\u9700\u8981\u6839\u636e\u5b9e\u9645\u7684\u4e1a\u52a1\u573a\u666f\u548c\u9700\u6c42\uff0c\u5bf9\u9501\u5b9e\u73b0\u65b9\u6848\u8fdb\u884c\u8c03\u6574\u548c\u4f18\u5316\u3002<\/p>\n
\n
\n <\/dt>\n
\n   \u5982\u4f55\u4f7f\u7528Docker\u8fdb\u884c\u5bb9\u5668\u7684\u6279\u91cf\u64cd\u4f5c\u548c\u7ba1\u7406\n <\/dd>\n<\/dl>\n
\n
\n <\/dt>\n
\n   \u5982\u4f55\u5229\u7528Redis\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\u7684\u9ad8\u53ef\u7528\n <\/dd>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"
\u5229\u7528Redis\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\uff0c\u4fdd\u969c...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-202271","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202271","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=202271"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202271\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202271"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202271"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202271"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}