{"id":201581,"date":"2025-05-10T11:37:29","date_gmt":"2025-05-10T03:37:29","guid":{"rendered":"https:\/\/server.hk\/cnblog\/201581\/"},"modified":"2025-05-10T11:37:29","modified_gmt":"2025-05-10T03:37:29","slug":"redis%e7%bc%93%e5%ad%98%e7%9a%84%e4%b8%bb%e8%a6%81%e5%bc%82%e5%b8%b8%e5%8f%8a%e8%a7%a3%e5%86%b3%e6%96%b9%e6%a1%88%e5%ae%9e%e4%be%8b","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/201581\/","title":{"rendered":"Redis\u7f13\u5b58\u7684\u4e3b\u8981\u5f02\u5e38\u53ca\u89e3\u51b3\u65b9\u6848\u5b9e\u4f8b"},"content":{"rendered":"

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

Redis\u7f13\u5b58\u7684\u4e3b\u8981\u5f02\u5e38\u53ca\u89e3\u51b3\u65b9\u6848\u5b9e\u4f8b<\/h1>\n

<\/i>\u6536\u85cf<\/span> <\/p>\n

\u6700\u8fd1\u53d1\u73b0\u4e0d\u5c11\u5c0f\u4f19\u4f34\u90fd\u5bf9\u6570\u636e\u5e93<\/span>\u5f88\u611f\u5174\u8da3\uff0c\u6240\u4ee5\u4eca\u5929\u7ee7\u7eed\u7ed9\u5927\u5bb6\u4ecb\u7ecd\u6570\u636e\u5e93<\/span>\u76f8\u5173\u7684\u77e5\u8bc6\uff0c\u672c\u6587\u300aRedis\u7f13\u5b58\u7684\u4e3b\u8981\u5f02\u5e38\u53ca\u89e3\u51b3\u65b9\u6848\u5b9e\u4f8b\u300b<\/span>\u4e3b\u8981\u5185\u5bb9\u6d89\u53ca\u5230\u5f02\u5e38\u3001\u89e3\u51b3\u3001redis\u7f13\u5b58<\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5e0c\u671b\u80fd\u5e2e\u5230\u4f60\uff01\u5f53\u7136\u5982\u679c\u9605\u8bfb\u672c\u6587\u65f6\u5b58\u5728\u4e0d\u540c\u60f3\u6cd5\uff0c\u53ef\u4ee5\u5728\u8bc4\u8bba\u4e2d\u8868\u8fbe\uff0c\u4f46\u662f\u8bf7\u52ff\u4f7f\u7528\u8fc7\u6fc0\u7684\u63aa\u8f9e~<\/p>\n

1 \u5bfc\u8bfb<\/h2>\n

Redis \u662f\u5f53\u524d\u6700\u6d41\u884c\u7684 NoSQL\u6570\u636e\u5e93\u3002Redis\u4e3b\u8981\u7528\u6765\u505a\u7f13\u5b58\u4f7f\u7528\uff0c\u5728\u63d0\u9ad8\u6570\u636e\u67e5\u8be2\u6548\u7387\u3001\u4fdd\u62a4\u6570\u636e\u5e93\u7b49\u65b9\u9762\u8d77\u5230\u4e86\u5173\u952e\u6027\u7684\u4f5c\u7528\uff0c\u5f88\u5927\u7a0b\u5ea6\u4e0a\u63d0\u9ad8\u7cfb\u7edf\u7684\u6027\u80fd\u3002\u5f53\u7136\u5728\u4f7f\u7528\u8fc7\u7a0b\u4e2d\uff0c\u4e5f\u4f1a\u51fa\u73b0\u4e00\u4e9b\u5f02\u5e38\u60c5\u666f\uff0c\u5bfc\u81f4Redis\u5931\u53bb\u7f13\u5b58\u4f5c\u7528\u3002<\/p>\n

2 \u5f02\u5e38\u7c7b\u578b<\/h2>\n

\u5f02\u5e38\u4e3b\u8981\u6709 \u7f13\u5b58\u96ea\u5d29 \u7f13\u5b58\u7a7f\u900f \u7f13\u5b58\u51fb\u7a7f\u3002<\/p>\n

2.1 \u7f13\u5b58\u96ea\u5d29<\/h3>\n

2.1.1 \u73b0\u8c61<\/h4>\n

\u7f13\u5b58\u96ea\u5d29\u662f\u6307\u5927\u91cf\u8bf7\u6c42\u5728\u7f13\u5b58\u4e2d\u6ca1\u6709\u67e5\u5230\u6570\u636e\uff0c\u76f4\u63a5\u8bbf\u95ee\u6570\u636e\u5e93\uff0c\u5bfc\u81f4\u6570\u636e\u5e93\u538b\u529b\u589e\u5927\uff0c\u6700\u7ec8\u5bfc\u81f4\u6570\u636e\u5e93\u5d29\u6e83\uff0c\u4ece\u800c\u6ce2\u53ca\u6574\u4e2a\u7cfb\u7edf\u4e0d\u53ef\u7528\uff0c\u597d\u50cf\u96ea\u5d29\u4e00\u6837\u3002<\/p>\n

<\/p>\n

2.1.2 \u5f02\u5e38\u539f\u56e0<\/h4>\n
    \n
  • \u7f13\u5b58\u670d\u52a1\u4e0d\u53ef\u7528\u3002<\/li>\n
  • \u7f13\u5b58\u670d\u52a1\u53ef\u7528\uff0c\u4f46\u662f\u5927\u91cfKEY\u540c\u65f6\u5931\u6548\u3002<\/li>\n<\/ul>\n

    2.1.3 \u89e3\u51b3\u65b9\u6848<\/h4>\n

    1.\u7f13\u5b58\u670d\u52a1\u4e0d\u53ef\u7528<\/p>\n

    redis\u7684\u90e8\u7f72\u65b9\u5f0f\u4e3b\u8981\u6709\u5355\u673a\u3001\u4e3b\u4ece\u3001\u54e8\u5175\u548c cluster\u6a21\u5f0f\u3002<\/p>\n

      \n
    • \u5355\u673a<\/li>\n<\/ul>\n

      \u53ea\u6709\u4e00\u53f0\u673a\u5668\uff0c\u6240\u6709\u6570\u636e\u90fd\u5b58\u5728\u8fd9\u53f0\u673a\u5668\u4e0a\uff0c\u5f53\u673a\u5668\u51fa\u73b0\u5f02\u5e38\u65f6\uff0credis\u5c06\u5931\u6548\uff0c\u53ef\u80fd\u4f1a\u5bfc\u81f4redis\u7f13\u5b58\u96ea\u5d29\u3002<\/p>\n

        \n
      • \u4e3b\u4ece<\/li>\n<\/ul>\n

        \u4e3b\u4ece\u5176\u5b9e\u5c31\u662f\u4e00\u53f0\u673a\u5668\u505a\u4e3b\uff0c\u4e00\u4e2a\u6216\u591a\u4e2a\u673a\u5668\u505a\u4ece\uff0c\u4ece\u8282\u70b9\u4ece\u4e3b\u8282\u70b9\u590d\u5236\u6570\u636e\uff0c\u53ef\u4ee5\u5b9e\u73b0\u8bfb\u5199\u5206\u79bb\uff0c\u4e3b\u8282\u70b9\u505a\u5199\uff0c\u4ece\u8282\u70b9\u505a\u8bfb\u3002
        \u4f18\u70b9\uff1a\u5f53\u67d0\u4e2a\u4ece\u8282\u70b9\u5f02\u5e38\u65f6\uff0c\u4e0d\u5f71\u54cd\u4f7f\u7528\u3002
        \u7f3a\u70b9\uff1a\u5f53\u4e3b\u8282\u70b9\u5f02\u5e38\u65f6\uff0c\u670d\u52a1\u5c06\u4e0d\u53ef\u7528\u3002<\/p>\n

          \n
        • \u54e8\u5175<\/li>\n<\/ul>\n

          \u54e8\u5175\u6a21\u5f0f\u4e5f\u662f\u4e00\u79cd\u4e3b\u4ece\uff0c\u53ea\u4e0d\u8fc7\u589e\u52a0\u4e86\u54e8\u5175\u7684\u529f\u80fd\uff0c\u7528\u4e8e\u76d1\u63a7\u4e3b\u8282\u70b9\u7684\u72b6\u6001\uff0c\u5f53\u4e3b\u8282\u70b9\u5b95\u673a\u4e4b\u540e\u4f1a\u8fdb\u884c\u6295\u7968\u5728\u4ece\u8282\u70b9\u4e2d\u91cd\u65b0\u9009\u51fa\u4e3b\u8282\u70b9\u3002<\/p>\n

          \u4f18\u70b9\uff1a\u9ad8\u53ef\u7528\uff0c\u5f53\u4e3b\u8282\u70b9\u5f02\u5e38\u65f6\uff0c\u81ea\u52a8\u5728\u4ece\u8282\u70b9\u5f53\u4e2d\u9009\u62e9\u4e00\u4e2a\u4e3b\u8282\u70b9\u3002
          \u7f3a\u70b9\uff1a\u53ea\u6709\u4e00\u4e2a\u4e3b\u8282\u70b9\uff0c\u5f53\u6570\u636e\u6bd4\u8f83\u591a\u65f6\uff0c\u4e3b\u8282\u70b9\u538b\u529b\u4f1a\u5f88\u5927\u3002<\/p>\n

            \n
          • cluster\u6a21\u5f0f<\/li>\n<\/ul>\n

            \u96c6\u7fa4\u91c7\u7528\u4e86\u591a\u4e3b\u591a\u4ece\uff0c\u6309\u7167\u4e00\u5b9a\u7684\u89c4\u5219\u8fdb\u884c\u5206\u7247\uff0c\u5c06\u6570\u636e\u5206\u522b\u5b58\u50a8\uff0c\u4e00\u5b9a\u7a0b\u5ea6\u4e0a\u89e3\u51b3\u4e86\u54e8\u5175\u6a21\u5f0f\u4e0b\u5355\u673a\u5b58\u50a8\u6709\u9650\u7684\u95ee\u9898\u3002<\/p>\n

            \u4f18\u70b9\uff1a\u9ad8\u53ef\u7528\uff0c\u914d\u7f6e\u4e86\u591a\u4e3b\u591a\u4ece\uff0c\u53ef\u4ee5\u4f7f\u6570\u636e\u5206\u533a\uff0c\u53bb\u4e2d\u5fc3\u5316\uff0c\u51cf\u5c0f\u4e86\u5355\u53f0\u673a\u5b50\u7684\u8d1f\u62c5.
            \u7f3a\u70b9\uff1a\u673a\u5668\u8d44\u6e90\u4f7f\u7528\u6bd4\u8f83\u591a\uff0c\u914d\u7f6e\u590d\u6742\u3002<\/p>\n

            \u5c0f\u7ed3
            \u4ece\u9ad8\u53ef\u7528\u5f97\u89d2\u5ea6\u8003\u8651\uff0c\u4f7f\u7528\u54e8\u5175\u6a21\u5f0f\u548ccluster\u6a21\u5f0f\u53ef\u4ee5\u9632\u6b62\u56e0\u4e3aredis\u4e0d\u53ef\u7528\u5bfc\u81f4\u7684\u7f13\u5b58\u96ea\u5d29\u95ee\u9898\u3002<\/p>\n

            2.\u5927\u91cfKEY\u540c\u65f6\u5931\u6548
            \u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u6c38\u4e0d\u5931\u6548\u3001\u8bbe\u7f6e\u4e0d\u540c\u5931\u6548\u65f6\u95f4\u3001\u4f7f\u7528\u4e8c\u7ea7\u7f13\u5b58\u548c\u5b9a\u65f6\u66f4\u65b0\u7f13\u5b58\u5931\u6548\u65f6\u95f4<\/p>\n

              \n
            • \u8bbe\u7f6e\u6c38\u4e0d\u5931\u6548<\/li>\n<\/ul>\n

              \u5982\u679c\u6240\u6709\u7684key\u90fd\u8bbe\u7f6e\u4e0d\u5931\u6548\uff0c\u4e0d\u5c31\u4e0d\u4f1a\u51fa\u73b0\u56e0\u4e3aKEY\u5931\u6548\u5bfc\u81f4\u7684\u7f13\u5b58\u96ea\u5d29\u95ee\u9898\u4e86\u3002<\/p>\n

              redis\u8bbe\u7f6ekey\u6c38\u8fdc\u6709\u6548\u7684\u547d\u4ee4\u5982\u4e0b\uff1a<\/p>\n

              \n

              PERSIST key<\/p>\n<\/blockquote>\n

              \u7f3a\u70b9\uff1a\u4f1a\u5bfc\u81f4redis\u7684\u7a7a\u95f4\u8d44\u6e90\u9700\u6c42\u53d8\u5927\u3002<\/p>\n

                \n
              • \u8bbe\u7f6e\u968f\u673a\u5931\u6548\u65f6\u95f4<\/li>\n<\/ul>\n

                \u5982\u679ckey\u7684\u5931\u6548\u65f6\u95f4\u4e0d\u76f8\u540c\uff0c\u5c31\u4e0d\u4f1a\u5728\u540c\u4e00\u65f6\u523b\u5931\u6548\uff0c\u8fd9\u6837\u5c31\u4e0d\u4f1a\u51fa\u73b0\u5927\u91cf\u8bbf\u95ee\u6570\u636e\u5e93\u7684\u60c5\u51b5\u3002<\/p>\n

                redis\u8bbe\u7f6ekey\u6709\u6548\u65f6\u95f4\u547d\u4ee4\u5982\u4e0b\uff1a<\/p>\n

                \n

                Expire key<\/p>\n<\/blockquote>\n

                \u793a\u4f8b\u4ee3\u7801\u5982\u4e0b,\u901a\u8fc7RedisClient\u5b9e\u73b0<\/p>\n

                \/**\n* \u968f\u673a\u8bbe\u7f6e\u5c0f\u4e8e30\u5206\u949f\u7684\u5931\u6548\u65f6\u95f4\n* @param redisKey\n* @param value\n*\/\nprivate void setRandomTimeForReidsKey(String redisKey,String value){\n\/\/\u968f\u673a\u51fd\u6570\nRandom rand = new Random();\n\/\/\u968f\u673a\u83b7\u53d630\u5206\u949f\u5185\uff0830*60\uff09\u7684\u968f\u673a\u6570\nint times = rand.nextInt(1800);\n\/\/\u8bbe\u7f6e\u7f13\u5b58\u65f6\u95f4\uff08\u7f13\u5b58\u7684key,\u7f13\u5b58\u7684\u503c\uff0c\u5931\u6548\u65f6\u95f4\uff1a\u5355\u4f4d\u79d2\uff09\nredisClient.setNxEx(redisKey,value,times);\n}\n<\/pre>\n
                  \n
                • \u4f7f\u7528\u4e8c\u7ea7\u7f13\u5b58<\/li>\n<\/ul>\n
                  \u4e8c\u7ea7\u7f13\u5b58\u662f\u4f7f\u7528\u4e24\u7ec4\u7f13\u5b58\uff0c1\u7ea7\u7f13\u5b58\u548c2\u7ea7\u7f13\u5b58\uff0c\u540c\u4e00\u4e2aKey\u5728\u4e24\u7ec4\u7f13\u5b58\u91cc\u90fd\u4fdd\u5b58\uff0c\u4f46\u662f\u4ed6\u4eec\u7684\u5931\u6548\u65f6\u95f4\u4e0d\u540c\uff0c\u8fd9\u68371\u7ea7\u7f13\u5b58\u6ca1\u6709\u67e5\u5230\u6570\u636e\u65f6\uff0c\u53ef\u4ee5\u5728\u4e8c\u7ea7\u7f13\u5b58\u91cc\u67e5\u8be2\uff0c\u4e0d\u4f1a\u76f4\u63a5\u8bbf\u95ee\u6570\u636e\u5e93\u3002<\/p>\n
                  \u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
                  public static void main(String[] args) {\nCacheTest test = new CacheTest();\n\/\/\u4ece1\u7ea7\u7f13\u5b58\u4e2d\u83b7\u53d6\u6570\u636e\nString value = test.queryByOneCacheKey(\"key\");\n\/\/\u5982\u679c1\u7ea7\u7f13\u5b58\u4e2d\u6ca1\u6709\u6570\u636e\uff0c\u518d\u4e8c\u7ea7\u7f13\u5b58\u4e2d\u67e5\u627e\nif(StringUtils.isBlank(value)){\nvalue = test.queryBySecondCacheKey(\"key\");\n\/\/\u5982\u679c\u4e8c\u7ea7\u7f13\u5b58\u4e2d\u6ca1\u6709\uff0c\u4ece\u6570\u636e\u5e93\u4e2d\u67e5\u627e\nif(StringUtils.isBlank(value)){\nvalue =test.getFromDb();\n\/\/\u5982\u679c\u6570\u636e\u5e93\u4e2d\u4e5f\u6ca1\u6709\uff0c\u5c31\u8fd4\u56de\u7a7a\nif(StringUtils.isBlank(value)){\nSystem.out.println(\"\u6570\u636e\u4e0d\u5b58\u5728!\");\n}else{\n\/\/\u4e8c\u7ea7\u7f13\u5b58\u4e2d\u4fdd\u5b58\u6570\u636e\ntest.secondCacheSave(\"key\",value);\n\/\/\u4e00\u7ea7\u7f13\u5b58\u4e2d\u4fdd\u5b58\u6570\u636e\ntest.oneCacheSave(\"key\",value);\nSystem.out.println(\"\u6570\u636e\u5e93\u4e2d\u8fd4\u56de\u6570\u636e!\");\n}\n}else{\n\/\/\u4e00\u7ea7\u7f13\u5b58\u4e2d\u4fdd\u5b58\u6570\u636e\ntest.oneCacheSave(\"key\",value);\nSystem.out.println(\"\u4e8c\u7ea7\u7f13\u5b58\u4e2d\u8fd4\u56de\u6570\u636e!\");\n}\n}else {\nSystem.out.println(\"\u4e00\u7ea7\u7f13\u5b58\u4e2d\u8fd4\u56de\u6570\u636e!\");\n}\n}\n<\/pre>\n
                    \n
                  • \u5f02\u6b65\u66f4\u65b0\u7f13\u5b58\u65f6\u95f4<\/li>\n<\/ul>\n
                    \u6bcf\u6b21\u8bbf\u95ee\u7f13\u5b58\u65f6\uff0c\u542f\u52a8\u4e00\u4e2a\u7ebf\u7a0b\u6216\u8005\u5efa\u7acb\u4e00\u4e2a\u5f02\u6b65\u4efb\u52a1\u6765\uff0c\u66f4\u65b0\u7f13\u5b58\u65f6\u95f4\u3002
                    \u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
                    public class CacheRunnable implements Runnable {\nprivate ClusterRedisClientAdapter redisClient;\n\/**\n* \u8981\u66f4\u65b0\u7684key\n*\/\npublic String key;\npublic CacheRunnable(String key){\nthis.key =key;\n}\n@Override\npublic void run() {\n\/\/\u66f4\u7ec6\u7f13\u5b58\u65f6\u95f4\nredisClient.expire(this.getKey(),1800);\n}\npublic String getKey() {\nreturn key;\n}\npublic void setKey(String key) {\nthis.key = key;\n}\n}\npublic static void main(String[] args) {\nCacheTest test = new CacheTest();\n\/\/\u4ece\u7f13\u5b58\u4e2d\u83b7\u53d6\u6570\u636e\nString value = test.getFromCache(\"key\");\nif(StringUtils.isBlank(value)){\n\/\/\u4ece\u6570\u636e\u5e93\u4e2d\u83b7\u53d6\u6570\u636e\nvalue = test.getFromDb(\"key\");\n\/\/\u5c06\u6570\u636e\u653e\u5728\u7f13\u5b58\u4e2d\ntest.oneCacheSave(\"key\",value);\n\/\/\u8fd4\u56de\u6570\u636e\nSystem.out.println(\"\u8fd4\u56de\u6570\u636e\");\n}else{\n\/\/\u5f02\u6b65\u4efb\u52a1\u66f4\u65b0\u7f13\u5b58\nCacheRunnable runnable = new CacheRunnable(\"key\");\nrunnable.run();\n\/\/\u8fd4\u56de\u6570\u636e\nSystem.out.println(\"\u8fd4\u56de\u6570\u636e\");\n}\n}\n<\/pre>\n
                    3.\u5c0f\u7ed3<\/p>\n
                    \u4e0a\u9762\u4ece\u670d\u52a1\u4e0d\u53ef\u7528\u548ckey\u5927\u9762\u79ef\u5931\u6548\u4e24\u4e2a\u65b9\u9762\uff0c\u5217\u4e3e\u4e86\u51e0\u79cd\u89e3\u51b3\u65b9\u6848\uff0c\u4e0a\u9762\u7684\u4ee3\u7801\u53ea\u662f\u63d0\u4f9b\u4e00\u4e9b\u601d\u8def\uff0c\u5177\u4f53\u5b9e\u65bd\u8fd8\u8981\u8003\u8651\u5230\u73b0\u5b9e\u60c5\u51b5\u3002\u5f53\u7136\u4e5f\u6709\u5176\u4ed6\u7684\u89e3\u51b3\u65b9\u6848\uff0c\u6211\u8fd9\u91cc\u4e3e\u4f8b\u662f\u6bd4\u8f83\u5e38\u7528\u7684\u3002\u6bd5\u7adf\u73b0\u5b9e\u60c5\u51b5\uff0c\u5343\u53d8\u4e07\u5316\uff0c\u6ca1\u6709\u6700\u597d\u7684\u65b9\u6848\uff0c\u53ea\u6709\u6700\u9002\u7528\u7684\u65b9\u6848\u3002<\/p>\n
                    2.2 \u7f13\u5b58\u7a7f\u900f<\/h3>\n
                    2.2.1 \u73b0\u8c61<\/h4>\n
                    \u7f13\u5b58\u7a7f\u900f\u662f\u6307\u5f53\u7528\u6237\u5728\u67e5\u8be2\u4e00\u6761\u6570\u636e\u7684\u65f6\u5019\uff0c\u800c\u6b64\u65f6\u6570\u636e\u5e93\u548c\u7f13\u5b58\u5374\u6ca1\u6709\u5173\u4e8e\u8fd9\u6761\u6570\u636e\u7684\u4efb\u4f55\u8bb0\u5f55\uff0c\u800c\u8fd9\u6761\u6570\u636e\u5728\u7f13\u5b58\u4e2d\u6ca1\u627e\u5230\u5c31\u4f1a\u5411\u6570\u636e\u5e93\u8bf7\u6c42\u83b7\u53d6\u6570\u636e\u3002\u7528\u6237\u62ff\u4e0d\u5230\u6570\u636e\u65f6\uff0c\u5c31\u4f1a\u4e00\u76f4\u53d1\u8bf7\u6c42\uff0c\u67e5\u8be2\u6570\u636e\u5e93\uff0c\u8fd9\u6837\u4f1a\u5bf9\u6570\u636e\u5e93\u7684\u8bbf\u95ee\u9020\u6210\u5f88\u5927\u7684\u538b\u529b\u3002<\/p>\n
                    <\/p>\n
                    2.2.2 \u5f02\u5e38\u539f\u56e0<\/h4>\n
                      \n
                    • \u975e\u6cd5\u8c03\u7528<\/li>\n<\/ul>\n
                      2.2.3 \u89e3\u51b3\u65b9\u6848<\/h4>\n
                      1.\u975e\u6cd5\u8c03\u7528<\/p>\n
                      \u53ef\u4ee5\u901a\u8fc7\u7f13\u5b58\u7a7a\u503c\u6216\u8fc7\u6ee4\u5668\u6765\u89e3\u51b3\u975e\u6cd5\u8c03\u7528\u5f15\u8d77\u7684\u7f13\u5b58\u7a7f\u900f\u95ee\u9898\u3002<\/p>\n
                        \n
                      • \u7f13\u5b58\u7a7a\u503c<\/li>\n<\/ul>\n
                        \u5f53\u7f13\u5b58\u548c\u6570\u636e\u5e93\u4e2d\u90fd\u6ca1\u6709\u503c\u65f6\uff0c\u53ef\u4ee5\u5728\u7f13\u5b58\u4e2d\u5b58\u653e\u4e00\u4e2a\u7a7a\u503c\uff0c\u8fd9\u6837\u5c31\u53ef\u4ee5\u51cf\u5c11\u91cd\u590d\u67e5\u8be2\u7a7a\u503c\u5f15\u8d77\u7684\u7cfb\u7edf\u538b\u529b\u589e\u5927\uff0c\u4ece\u800c\u4f18\u5316\u4e86\u7f13\u5b58\u7a7f\u900f\u95ee\u9898\u3002
                        \u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
                        private String queryMessager(String key){\n\/\/\u4ece\u7f13\u5b58\u4e2d\u83b7\u53d6\u6570\u636e\nString message = getFromCache(key);\n\/\/\u5982\u679c\u7f13\u5b58\u4e2d\u6ca1\u6709 \u4ece\u6570\u636e\u5e93\u4e2d\u67e5\u627e\nif(StringUtils.isBlank(message)){\nmessage = getFromDb(key);\n\/\/\u5982\u679c\u6570\u636e\u5e93\u4e2d\u4e5f\u6ca1\u6709\u6570\u636e \u5c31\u8bbe\u7f6e\u77ed\u65f6\u95f4\u7684\u7f13\u5b58\nif(StringUtils.isBlank(message)){\n\/\/\u8bbe\u7f6e\u7f13\u5b58\u65f6\u95f4\uff08\u7f13\u5b58\u7684key,\u7f13\u5b58\u7684\u503c\uff0c\u5931\u6548\u65f6\u95f4\uff1a\u5355\u4f4d\u79d2\uff09\nredisClient.setNxEx(key,null,60);\n}else{\nredisClient.setNxEx(key,message,1800);\n}\n}\nreturn message;\n}\n<\/pre>\n
                        \u7f3a\u70b9\uff1a\u5927\u91cf\u7684\u7a7a\u7f13\u5b58\u5bfc\u81f4\u8d44\u6e90\u7684\u6d6a\u8d39\uff0c\u4e5f\u6709\u53ef\u80fd\u5bfc\u81f4\u7f13\u5b58\u548c\u6570\u636e\u5e93\u4e2d\u7684\u6570\u636e\u4e0d\u4e00\u81f4\u3002<\/p>\n
                          \n
                        • \u5e03\u9686\u8fc7\u6ee4\u5668<\/li>\n<\/ul>\n
                          \u5e03\u9686\u8fc7\u6ee4\u5668\u7531\u5e03\u9686\u5728 1970 \u5e74\u63d0\u51fa\u3002\u5b83\u5b9e\u9645\u4e0a\u662f\u4e00\u4e2a\u5f88\u957f\u7684\u4e8c\u8fdb\u5236\u5411\u91cf\u548c\u4e00\u7cfb\u5217\u968f\u673a\u6620\u5c04\u51fd\u6570\u3002\u5e03\u9686\u8fc7\u6ee4\u5668\u53ef\u4ee5\u7528\u4e8e\u68c0\u7d22\u4e00\u4e2a\u5143\u7d20\u662f\u5426\u5728\u4e00\u4e2a\u96c6\u5408\u4e2d\u3002\u662f\u4ee5\u7a7a\u95f4\u6362\u65f6\u95f4\u7684\u7b97\u6cd5\u3002<\/p>\n
                          <\/p>\n
                          \u5e03\u9686\u8fc7\u6ee4\u5668\u7684\u5b9e\u73b0\u539f\u7406\u662f\u4e00\u4e2a\u8d85\u5927\u7684\u4f4d\u6570\u7ec4\u548c\u51e0\u4e2a\u54c8\u5e0c\u51fd\u6570\u3002<\/p>\n
                          \u5047\u8bbe\u54c8\u5e0c\u51fd\u6570\u7684\u4e2a\u6570\u4e3a 3\u3002\u9996\u5148\u5c06\u4f4d\u6570\u7ec4\u8fdb\u884c\u521d\u59cb\u5316\uff0c\u521d\u59cb\u5316\u72b6\u6001\u7684\u7ef4\u6570\u7ec4\u7684\u6bcf\u4e2a\u4f4d\u90fd\u8bbe\u7f6e\u4f4d 0\u3002\u5982\u679c\u4e00\u6b21\u6570\u636e\u8bf7\u6c42\u7684\u7ed3\u679c\u4e3a\u7a7a\uff0c\u5c31\u5c06key\u4f9d\u6b21\u901a\u8fc7 3 \u4e2a\u54c8\u5e0c\u51fd\u6570\u8fdb\u884c\u6620\u5c04\uff0c\u6bcf\u6b21\u6620\u5c04\u90fd\u4f1a\u4ea7\u751f\u4e00\u4e2a\u54c8\u5e0c\u503c\uff0c\u8fd9\u4e2a\u503c\u5bf9\u5e94\u4f4d\u6570\u7ec4\u4e0a\u9762\u7684\u4e00\u4e2a\u70b9\uff0c\u7136\u540e\u5c06\u4f4d\u6570\u7ec4\u5bf9\u5e94\u7684\u4f4d\u7f6e\u6807\u8bb0\u4e3a 1\u3002\u5f53\u6570\u636e\u8bf7\u6c42\u518d\u6b21\u53d1\u8fc7\u6765\u65f6\uff0c\u7528\u540c\u6837\u7684\u65b9\u6cd5\u5c06 key \u901a\u8fc7\u54c8\u5e0c\u6620\u5c04\u5230\u4f4d\u6570\u7ec4\u4e0a\u7684 3 \u4e2a\u70b9\u3002\u5982\u679c 3 \u4e2a\u70b9\u4e2d\u4efb\u610f\u4e00\u4e2a\u70b9\u4e0d\u4e3a 1\uff0c\u5219\u53ef\u4ee5\u5224\u65adkey\u4e0d\u4e3a\u7a7a\u3002\u53cd\u4e4b\uff0c\u5982\u679c 3 \u4e2a\u70b9\u90fd\u4e3a 1\uff0c\u5219\u8be5KEY\u4e00\u5b9a\u4e3a\u7a7a\u3002<\/p>\n
                          \n
                          \u7f3a\u70b9\uff1a<\/p>\n
                          \u53ef\u80fd\u51fa\u73b0\u8bef\u5224\uff0c\u4f8b\u5982 A \u7ecf\u8fc7\u54c8\u5e0c\u51fd\u6570 \u5b58\u5230 1\u30013\u548c5\u4f4d\u7f6e\u3002B\u7ecf\u8fc7\u54c8\u5e0c\u51fd\u6570\u5b58\u5230 3\u30015\u548c7\u4f4d\u7f6e\u3002C\u7ecf\u8fc7\u54c8\u5e0c\u51fd\u6570\u5f97\u5230\u4f4d\u7f6e 3\u30015\u548c7\u4f4d\u7f6e\u3002\u7531\u4e8e3\u30015\u548c7\u90fd\u6709\u503c\uff0c\u5bfc\u81f4\u5224\u65adA\u4e5f\u5728\u6570\u7ec4\u4e2d\u3002\u8fd9\u79cd\u60c5\u51b5\u968f\u7740\u6570\u636e\u7684\u589e\u591a\uff0c\u51e0\u7387\u4e5f\u53d8\u5927\u3002
                          \u5e03\u9686\u8fc7\u6ee4\u5668\u6ca1\u6cd5\u5220\u9664\u6570\u636e\u3002<\/p>\n<\/blockquote>\n
                            \n
                          • \u5e03\u9686\u8fc7\u6ee4\u5668\u589e\u5f3a\u7248<\/li>\n<\/ul>\n
                            \u589e\u5f3a\u7248\u662f\u5c06\u5e03\u9686\u8fc7\u6ee4\u5668\u7684bitmap\u66f4\u6362\u6210\u6570\u7ec4,\u5f53\u6570\u7ec4\u67d0\u4f4d\u7f6e\u88ab\u6620\u5c04\u4e00\u6b21\u65f6\u5c31+1,\u5f53\u5220\u9664\u65f6\u5c31-1,\u8fd9\u6837\u5c31\u907f\u514d\u4e86\u666e\u901a\u5e03\u9686\u8fc7\u6ee4\u5668\u5220\u9664\u6570\u636e\u540e\u9700\u8981\u91cd\u65b0\u8ba1\u7b97\u5176\u4f59\u6570\u636e\u5305Hash\u7684\u95ee\u9898,\u4f46\u662f\u4f9d\u65e7\u6ca1\u6cd5\u907f\u514d\u8bef\u5224\u3002<\/p>\n
                              \n
                            • \u5e03\u8c37\u9e1f\u8fc7\u6ee4\u5668<\/li>\n<\/ul>\n
                              \u4f46\u662f\u5982\u679c\u8fd9\u4e24\u4e2a\u4f4d\u7f6e\u90fd\u6ee1\u4e86\uff0c\u5b83\u5c31\u4e0d\u5f97\u4e0d\u300c\u9e20\u5360\u9e4a\u5de2\u300d\uff0c\u968f\u673a\u8e22\u8d70\u4e00\u4e2a\uff0c\u7136\u540e\u81ea\u5df1\u9738\u5360\u4e86\u8fd9\u4e2a\u4f4d\u7f6e\u3002\u4e0d\u540c\u4e8e\u5e03\u8c37\u9e1f\u7684\u662f\uff0c\u5e03\u8c37\u9e1f\u54c8\u5e0c\u7b97\u6cd5\u4f1a\u5e2e\u8fd9\u4e9b\u53d7\u5bb3\u8005\uff08\u88ab\u6324\u8d70\u7684\u86cb\uff09\u5bfb\u627e\u5176\u5b83\u7684\u7a9d\u3002\u56e0\u4e3a\u6bcf\u4e00\u4e2a\u5143\u7d20\u90fd\u53ef\u4ee5\u653e\u5728\u4e24\u4e2a\u4f4d\u7f6e\uff0c\u53ea\u8981\u4efb\u610f\u4e00\u4e2a\u6709\u7a7a\u4f4d\u7f6e\uff0c\u5c31\u53ef\u4ee5\u585e\u8fdb\u53bb\u3002\u6240\u4ee5\u8fd9\u4e2a\u4f24\u5fc3\u7684\u88ab\u6324\u8d70\u7684\u86cb\u4f1a\u770b\u770b\u81ea\u5df1\u7684\u53e6\u4e00\u4e2a\u4f4d\u7f6e\u6709\u6ca1\u6709\u7a7a\uff0c\u5982\u679c\u7a7a\u4e86\uff0c\u81ea\u5df1\u632a\u8fc7\u53bb\u4e5f\u5c31\u7686\u5927\u6b22\u559c\u4e86\u3002\u4f46\u662f\u5982\u679c\u8fd9\u4e2a\u4f4d\u7f6e\u4e5f\u88ab\u522b\u4eba\u5360\u4e86\u5462\uff1f\u597d\uff0c\u90a3\u4e48\u5b83\u4f1a\u518d\u6765\u4e00\u6b21\u300c\u9e20\u5360\u9e4a\u5de2\u300d\uff0c\u5c06\u53d7\u5bb3\u8005\u7684\u89d2\u8272\u8f6c\u5ac1\u7ed9\u522b\u4eba\u3002\u7136\u540e\u8fd9\u4e2a\u65b0\u7684\u53d7\u5bb3\u8005\u8fd8\u4f1a\u91cd\u590d\u8fd9\u4e2a\u8fc7\u7a0b\u76f4\u5230\u6240\u6709\u7684\u86cb\u90fd\u627e\u5230\u4e86\u81ea\u5df1\u7684\u5de2\u4e3a\u6b62\u3002<\/p>\n
                              \n
                              \u7f3a\u70b9\uff1a<\/p>\n
                              \u5982\u679c\u6570\u7ec4\u592a\u62e5\u6324\u4e86\uff0c\u8fde\u7eed\u8e22\u6765\u8e22\u53bb\u51e0\u767e\u6b21\u8fd8\u6ca1\u6709\u505c\u4e0b\u6765\uff0c\u8fd9\u65f6\u5019\u4f1a\u4e25\u91cd\u5f71\u54cd\u63d2\u5165\u6548\u7387\u3002\u8fd9\u65f6\u5019\u5e03\u8c37\u9e1f\u54c8\u5e0c\u4f1a\u8bbe\u7f6e\u4e00\u4e2a\u9608\u503c\uff0c\u5f53\u8fde\u7eed\u5360\u5de2\u884c\u4e3a\u8d85\u51fa\u4e86\u67d0\u4e2a\u9608\u503c\uff0c\u5c31\u8ba4\u4e3a\u8fd9\u4e2a\u6570\u7ec4\u5df2\u7ecf\u51e0\u4e4e\u6ee1\u4e86\u3002\u8fd9\u65f6\u5019\u5c31\u9700\u8981\u5bf9\u5b83\u8fdb\u884c\u6269\u5bb9\uff0c\u91cd\u65b0\u653e\u7f6e\u6240\u6709\u5143\u7d20\u3002<\/p>\n<\/blockquote>\n
                              2.\u5c0f\u7ed3<\/p>\n
                              \u4ee5\u4e0a\u65b9\u6cd5\u867d\u7136\u90fd\u6709\u7f3a\u70b9\uff0c\u4f46\u662f\u53ef\u4ee5\u6709\u6548\u7684\u9632\u6b62\u56e0\u4e3a\u5927\u91cf\u7a7a\u6570\u636e\u67e5\u8be2\u5bfc\u81f4\u7684\u7f13\u5b58\u7a7f\u900f\u95ee\u9898\uff0c\u9664\u4e86\u7cfb\u7edf\u4e0a\u7684\u4f18\u5316\uff0c\u8fd8\u8981\u52a0\u5f3a\u5bf9\u7cfb\u7edf\u7684\u76d1\u63a7\uff0c\u53d1\u4e0b\u5f02\u5e38\u8c03\u7528\u65f6\uff0c\u53ca\u65f6\u52a0\u5165\u9ed1\u540d\u5355\u3002\u964d\u4f4e\u5f02\u5e38\u8c03\u7528\u5bf9\u7cfb\u7edf\u7684\u5f71\u54cd\u3002<\/p>\n
                              2.3 \u7f13\u5b58\u51fb\u7a7f<\/h3>\n
                              2.3.1 \u73b0\u8c61<\/h4>\n
                              key\u4e2d\u5bf9\u5e94\u6570\u636e\u5b58\u5728\uff0c\u5f53key\u4e2d\u5bf9\u5e94\u7684\u6570\u636e\u5728\u7f13\u5b58\u4e2d\u8fc7\u671f\uff0c\u800c\u6b64\u65f6\u53c8\u6709\u5927\u91cf\u8bf7\u6c42\u8bbf\u95ee\u8be5\u6570\u636e\uff0c\u7f13\u5b58\u4e2d\u8fc7\u671f\u4e86\uff0c\u8bf7\u6c42\u4f1a\u76f4\u63a5\u8bbf\u95ee\u6570\u636e\u5e93\u5e76\u56de\u8bbe\u5230\u7f13\u5b58\u4e2d\uff0c\u9ad8\u5e76\u53d1\u8bbf\u95ee\u6570\u636e\u5e93\u4f1a\u5bfc\u81f4\u6570\u636e\u5e93\u5d29\u6e83\u3002redis\u7684\u9ad8QPS\u7279\u6027,\u53ef\u4ee5\u5f88\u597d\u7684\u89e3\u51b3\u67e5\u6570\u636e\u5e93\u5f88\u6162\u7684\u95ee\u9898\u3002\u4f46\u662f\u5982\u679c\u6211\u4eec\u7cfb\u7edf\u7684\u5e76\u53d1\u5f88\u9ad8,\u5728\u67d0\u4e2a\u65f6\u95f4\u8282\u70b9,\u7a81\u7136\u7f13\u5b58\u5931\u6548,\u8fd9\u65f6\u5019\u6709\u5927\u91cf\u7684\u8bf7\u6c42\u6253\u8fc7\u6765\uff0c\u90a3\u4e48\u7531\u4e8eredis\u6ca1\u6709\u7f13\u5b58\u6570\u636e,\u8fd9\u65f6\u5019\u6211\u4eec\u7684\u8bf7\u6c42\u4f1a\u5168\u90e8\u53bb\u67e5\u4e00\u904d\u6570\u636e\u5e93\uff0c\u8fd9\u65f6\u5019\u6211\u4eec\u7684\u6570\u636e\u5e93\u670d\u52a1\u4f1a\u9762\u4e34\u975e\u5e38\u5927\u7684\u98ce\u9669,\u8981\u4e48\u8fde\u63a5\u88ab\u5360\u6ee1\uff0c\u8981\u4e48\u5176\u4ed6\u4e1a\u52a1\u4e0d\u53ef\u7528\uff0c\u8fd9\u79cd\u60c5\u51b5\u5c31\u662fredis\u7684\u7f13\u5b58\u51fb\u7a7f\u3002<\/p>\n
                              <\/p>\n
                              2.3.2 \u5f02\u5e38\u539f\u56e0<\/h4>\n
                              \u70ed\u70b9KEY\u5931\u6548\u7684\u540c\u65f6\uff0c\u5927\u91cf\u76f8\u540cKEY\u8bf7\u6c42\u540c\u65f6\u8bbf\u95ee\u3002<\/p>\n
                              2.3.3 \u89e3\u51b3\u65b9\u6848<\/h4>\n
                              1.\u70ed\u70b9key\u5931\u6548<\/p>\n
                                \n
                              • \u8bbe\u7f6e\u6c38\u4e0d\u5931\u6548<\/li>\n<\/ul>\n
                                \u5982\u679c\u6240\u6709\u7684key\u90fd\u8bbe\u7f6e\u4e0d\u5931\u6548\uff0c\u4e0d\u5c31\u4e0d\u4f1a\u51fa\u73b0\u56e0\u4e3aKEY\u5931\u6548\u5bfc\u81f4\u7684\u7f13\u5b58\u96ea\u5d29\u95ee\u9898\u4e86\u3002redis\u8bbe\u7f6ekey\u6c38\u8fdc\u6709\u6548\u7684\u547d\u4ee4\u5982\u4e0b\uff1a
                                PERSIST key
                                \u7f3a\u70b9\uff1a\u4f1a\u5bfc\u81f4redis\u7684\u7a7a\u95f4\u8d44\u6e90\u9700\u6c42\u53d8\u5927\u3002<\/p>\n
                                  \n
                                • \u8bbe\u7f6e\u968f\u673a\u5931\u6548\u65f6\u95f4<\/li>\n<\/ul>\n
                                  \u5982\u679ckey\u7684\u5931\u6548\u65f6\u95f4\u4e0d\u76f8\u540c\uff0c\u5c31\u4e0d\u4f1a\u5728\u540c\u4e00\u65f6\u523b\u5931\u6548\uff0c\u8fd9\u6837\u5c31\u4e0d\u4f1a\u51fa\u73b0\u5927\u91cf\u8bbf\u95ee\u6570\u636e\u5e93\u7684\u60c5\u51b5\u3002
                                  redis\u8bbe\u7f6ekey\u6709\u6548\u65f6\u95f4\u547d\u4ee4\u5982\u4e0b\uff1a
                                  Expire key
                                  \u793a\u4f8b\u4ee3\u7801\u5982\u4e0b,\u901a\u8fc7RedisClient\u5b9e\u73b0<\/p>\n
                                  \/**\n* \u968f\u673a\u8bbe\u7f6e\u5c0f\u4e8e30\u5206\u949f\u7684\u5931\u6548\u65f6\u95f4\n* @param redisKey\n* @param value\n*\/\nprivate void setRandomTimeForReidsKey(String redisKey,String value){\n\/\/\u968f\u673a\u51fd\u6570\nRandom rand = new Random();\n\/\/\u968f\u673a\u83b7\u53d630\u5206\u949f\u5185\uff0830*60\uff09\u7684\u968f\u673a\u6570\nint times = rand.nextInt(1800);\n\/\/\u8bbe\u7f6e\u7f13\u5b58\u65f6\u95f4\uff08\u7f13\u5b58\u7684key,\u7f13\u5b58\u7684\u503c\uff0c\u5931\u6548\u65f6\u95f4\uff1a\u5355\u4f4d\u79d2\uff09\nredisClient.setNxEx(redisKey,value,times);\n}\n<\/pre>\n
                                    \n
                                  • \u4f7f\u7528\u4e8c\u7ea7\u7f13\u5b58<\/li>\n<\/ul>\n
                                    \u4e8c\u7ea7\u7f13\u5b58\u662f\u4f7f\u7528\u4e24\u7ec4\u7f13\u5b58\uff0c1\u7ea7\u7f13\u5b58\u548c2\u7ea7\u7f13\u5b58\uff0c\u540c\u4e00\u4e2aKey\u5728\u4e24\u7ec4\u7f13\u5b58\u91cc\u90fd\u4fdd\u5b58\uff0c\u4f46\u662f\u4ed6\u4eec\u7684\u5931\u6548\u65f6\u95f4\u4e0d\u540c\uff0c\u8fd9\u68371\u7ea7\u7f13\u5b58\u6ca1\u6709\u67e5\u5230\u6570\u636e\u65f6\uff0c\u53ef\u4ee5\u5728\u4e8c\u7ea7\u7f13\u5b58\u91cc\u67e5\u8be2\uff0c\u4e0d\u4f1a\u76f4\u63a5\u8bbf\u95ee\u6570\u636e\u5e93\u3002
                                    \u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
                                    public static void main(String[] args) {\nCacheTest test = new CacheTest();\n\/\/\u4ece1\u7ea7\u7f13\u5b58\u4e2d\u83b7\u53d6\u6570\u636e\nString value = test.queryByOneCacheKey(\"key\");\n\/\/\u5982\u679c1\u7ea7\u7f13\u5b58\u4e2d\u6ca1\u6709\u6570\u636e\uff0c\u518d\u4e8c\u7ea7\u7f13\u5b58\u4e2d\u67e5\u627e\nif(StringUtils.isBlank(value)){\nvalue = test.queryBySecondCacheKey(\"key\");\n\/\/\u5982\u679c\u4e8c\u7ea7\u7f13\u5b58\u4e2d\u6ca1\u6709\uff0c\u4ece\u6570\u636e\u5e93\u4e2d\u67e5\u627e\nif(StringUtils.isBlank(value)){\nvalue =test.getFromDb();\n\/\/\u5982\u679c\u6570\u636e\u5e93\u4e2d\u4e5f\u6ca1\u6709\uff0c\u5c31\u8fd4\u56de\u7a7a\nif(StringUtils.isBlank(value)){\nSystem.out.println(\"\u6570\u636e\u4e0d\u5b58\u5728!\");\n}else{\n\/\/\u4e8c\u7ea7\u7f13\u5b58\u4e2d\u4fdd\u5b58\u6570\u636e\ntest.secondCacheSave(\"key\",value);\n\/\/\u4e00\u7ea7\u7f13\u5b58\u4e2d\u4fdd\u5b58\u6570\u636e\ntest.oneCacheSave(\"key\",value);\nSystem.out.println(\"\u6570\u636e\u5e93\u4e2d\u8fd4\u56de\u6570\u636e!\");\n}\n}else{\n\/\/\u4e00\u7ea7\u7f13\u5b58\u4e2d\u4fdd\u5b58\u6570\u636e\ntest.oneCacheSave(\"key\",value);\nSystem.out.println(\"\u4e8c\u7ea7\u7f13\u5b58\u4e2d\u8fd4\u56de\u6570\u636e!\");\n}\n}else {\nSystem.out.println(\"\u4e00\u7ea7\u7f13\u5b58\u4e2d\u8fd4\u56de\u6570\u636e!\");\n}\n}\n<\/pre>\n
                                      \n
                                    • \u5f02\u6b65\u66f4\u65b0\u7f13\u5b58\u65f6\u95f4<\/li>\n<\/ul>\n
                                      \u6bcf\u6b21\u8bbf\u95ee\u7f13\u5b58\u65f6\uff0c\u542f\u52a8\u4e00\u4e2a\u7ebf\u7a0b\u6216\u8005\u5efa\u7acb\u4e00\u4e2a\u5f02\u6b65\u4efb\u52a1\u6765\uff0c\u66f4\u65b0\u7f13\u5b58\u65f6\u95f4\u3002
                                      \u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
                                      public class CacheRunnable implements Runnable {\nprivate ClusterRedisClientAdapter redisClient;\n\/**\n* \u8981\u66f4\u65b0\u7684key\n*\/\npublic String key;\npublic CacheRunnable(String key){\nthis.key =key;\n}\n@Override\npublic void run() {\n\/\/\u66f4\u7ec6\u7f13\u5b58\u65f6\u95f4\nredisClient.expire(this.getKey(),1800);\n}\npublic String getKey() {\nreturn key;\n}\npublic void setKey(String key) {\nthis.key = key;\n}\n}\npublic static void main(String[] args) {\nCacheTest test = new CacheTest();\n\/\/\u4ece\u7f13\u5b58\u4e2d\u83b7\u53d6\u6570\u636e\nString value = test.getFromCache(\"key\");\nif(StringUtils.isBlank(value)){\n\/\/\u4ece\u6570\u636e\u5e93\u4e2d\u83b7\u53d6\u6570\u636e\nvalue = test.getFromDb(\"key\");\n\/\/\u5c06\u6570\u636e\u653e\u5728\u7f13\u5b58\u4e2d\ntest.oneCacheSave(\"key\",value);\n\/\/\u8fd4\u56de\u6570\u636e\nSystem.out.println(\"\u8fd4\u56de\u6570\u636e\");\n}else{\n\/\/\u5f02\u6b65\u4efb\u52a1\u66f4\u65b0\u7f13\u5b58\nCacheRunnable runnable = new CacheRunnable(\"key\");\nrunnable.run();\n\/\/\u8fd4\u56de\u6570\u636e\nSystem.out.println(\"\u8fd4\u56de\u6570\u636e\");\n}\n}\n<\/pre>\n
                                        \n
                                      • \u5206\u5e03\u5f0f\u9501<\/li>\n<\/ul>\n
                                        \u4f7f\u7528\u5206\u5e03\u5f0f\u9501\uff0c\u540c\u4e00\u65f6\u95f4\u53ea\u67091\u4e2a\u8bf7\u6c42\u53ef\u4ee5\u8bbf\u95ee\u5230\u6570\u636e\u5e93\uff0c\u5176\u4ed6\u8bf7\u6c42\u7b49\u5f85\u4e00\u6bb5\u65f6\u95f4\u540e\uff0c\u91cd\u590d\u8c03\u7528\u3002<\/p>\n
                                        \u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
                                        \/**\n* \u6839\u636ekey\u83b7\u53d6\u6570\u636e\n* @param key\n* @return\n* @throws InterruptedException\n*\/\npublic String queryForMessage(String key) throws InterruptedException {\n\/\/\u521d\u59cb\u5316\u8fd4\u56de\u7ed3\u679c\nString result = StringUtils.EMPTY;\n\/\/\u4ece\u7f13\u5b58\u4e2d\u83b7\u53d6\u6570\u636e\nresult = queryByOneCacheKey(key);\n\/\/\u5982\u679c\u7f13\u5b58\u4e2d\u6709\u6570\u636e\uff0c\u76f4\u63a5\u8fd4\u56de\nif(StringUtils.isNotBlank(result)){\nreturn result;\n}else{\n\/\/\u83b7\u53d6\u5206\u5e03\u5f0f\u9501\nif(lockByBusiness(key)){\n\/\/\u4ece\u6570\u636e\u5e93\u4e2d\u83b7\u53d6\u6570\u636e\nresult = getFromDb(key);\n\/\/\u5982\u679c\u6570\u636e\u5e93\u4e2d\u6709\u6570\u636e\uff0c\u5c31\u52a0\u5728\u7f13\u5b58\u4e2d\nif(StringUtils.isNotBlank(result)){\noneCacheSave(key,result);\n}\n}else {\n\/\/\u5982\u679c\u6ca1\u6709\u83b7\u53d6\u5230\u5206\u5e03\u5f0f\u9501\uff0c\u7761\u7720\u4e00\u4e0b\uff0c\u518d\u63a5\u7740\u67e5\u8be2\u6570\u636e\nThread.sleep(500);\nreturn queryForMessage(key);\n}\n}\nreturn result;\n}\n<\/pre>\n
                                        2.\u5c0f\u7ed3<\/p>\n
                                        \u9664\u4e86\u4ee5\u4e0a\u89e3\u51b3\u65b9\u6cd5\uff0c\u8fd8\u53ef\u4ee5\u9884\u5148\u8bbe\u7f6e\u70ed\u95e8\u6570\u636e\uff0c\u901a\u8fc7\u4e00\u4e9b\u76d1\u63a7\u65b9\u6cd5\uff0c\u53ca\u65f6\u6536\u96c6\u70ed\u70b9\u6570\u636e\uff0c\u5c06\u6570\u636e\u9884\u5148\u4fdd\u5b58\u5728\u7f13\u5b58\u4e2d\u3002<\/p>\n
                                        3 \u603b\u7ed3<\/h2>\n
                                        Redis\u7f13\u5b58\u5728\u4e92\u8054\u7f51\u4e2d\u81f3\u5173\u91cd\u8981\uff0c\u53ef\u4ee5\u5f88\u5927\u7684\u63d0\u5347\u7cfb\u7edf\u6548\u7387\u3002 \u672c\u6587\u4ecb\u7ecd\u7684\u7f13\u5b58\u5f02\u5e38\u4ee5\u53ca\u89e3\u51b3\u601d\u8def\u6709\u53ef\u80fd\u4e0d\u591f\u5168\u9762\uff0c\u4f46\u4e5f\u63d0\u4f9b\u76f8\u5e94\u7684\u89e3\u51b3\u601d\u8def\u548c\u4ee3\u7801\u5927\u4f53\u5b9e\u73b0\uff0c\u5e0c\u671b\u53ef\u4ee5\u4e3a\u5927\u5bb6\u63d0\u4f9b\u4e00\u4e9b\u9047\u5230\u7f13\u5b58\u95ee\u9898\u65f6\u7684\u89e3\u51b3\u601d\u8def\u3002\u5982\u679c\u6709\u4e0d\u8db3\u7684\u5730\u65b9\uff0c\u4e5f\u8bf7\u5e2e\u5fd9\u6307\u51fa\uff0c\u5927\u5bb6\u5171\u540c\u8fdb\u6b65\uff0c\u66f4\u591a\u5173\u4e8eRedis\u7f13\u5b58\u5f02\u5e38\u89e3\u51b3\u7684\u8d44\u6599\u8bf7\u5173\u6ce8golang\u5b66\u4e60\u7f51\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
                                        Redis\u7f13\u5b58\u7684\u4e3b\u8981\u5f02\u5e38\u53ca\u89e3\u51b3\u65b9...<\/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-201581","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/201581","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=201581"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/201581\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=201581"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=201581"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=201581"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}