{"id":3054,"date":"2023-08-02T09:46:33","date_gmt":"2023-08-02T01:46:33","guid":{"rendered":"https:\/\/xinchewhd.com.cn\/?p=3054"},"modified":"2023-08-02T09:46:40","modified_gmt":"2023-08-02T01:46:40","slug":"%e4%b8%80%e4%b8%aa%e6%b3%a8%e8%a7%a3%e4%bc%98%e9%9b%85%e7%9a%84%e5%ae%9e%e7%8e%b0redisson%e5%88%86%e5%b8%83%e5%bc%8f%e9%94%81","status":"publish","type":"post","link":"https:\/\/xinchewhd.com.cn\/index.php\/spring-boot\/%e4%b8%80%e4%b8%aa%e6%b3%a8%e8%a7%a3%e4%bc%98%e9%9b%85%e7%9a%84%e5%ae%9e%e7%8e%b0redisson%e5%88%86%e5%b8%83%e5%bc%8f%e9%94%81\/","title":{"rendered":"\u4e00\u4e2a\u6ce8\u89e3\u4f18\u96c5\u7684\u5b9e\u73b0Redisson\u5206\u5e03\u5f0f\u9501"},"content":{"rendered":"

\u4f60\u77e5\u9053\u7684\u8d8a\u591a\uff0c\u4e0d\u77e5\u9053\u7684\u5c31\u8d8a\u591a\uff0c\u4e1a\u4f59\u7684\u50cf\u4e00\u68f5\u5c0f\u8349\uff01<\/span><\/h2>\n

\u4f60\u6765\uff0c\u6211\u4eec\u4e00\u8d77\u7cbe\u8fdb\uff01\u4f60\u4e0d\u6765\uff0c\u6211\u548c\u4f60\u7684\u7ade\u4e89\u5bf9\u624b\u4e00\u8d77\u7cbe\u8fdb\uff01<\/span><\/p>\n

\u7f16\u8f91\uff1a\u4e1a\u4f59\u8349<\/span><\/h2>\n

\u6765\u6e90\uff1ajuejin.cn\/post\/7215142807861379109<\/span><\/p>\n

\u63a8\u8350\uff1ahttps:\/\/t.zsxq.com\/104xTbTKd<\/span><\/span><\/p>\n

\u81ea\u5f8b\u624d<\/span>\u80fd\u81ea\u7531<\/span><\/p>\n

\n

\u5206\u5e03\u5f0f\u9501\uff0c\u76f8\u4fe1\u5927\u5bb6\u90fd\u4e0d\u964c\u751f\uff0c\u4e5f\u90fd\u4f7f\u7528\u8fc7\u3002<\/p>\n

\u6700\u8fd1\u6211\u5728\u516c\u53f8\u7684\u5e95\u5c42\u6846\u67b6\u5347\u7ea7\u65f6\uff0c\u53d1\u73b0\u4e1a\u52a1\u4ee3\u7801\u4e2d\u4e0d\u5c11\u5730\u65b9\u8026\u5408\u7684\u4f7f\u7528\u4e86 Redisson \u5206\u5e03\u5f0f\u9501\u7684\u539f\u59cb\u8c03\u7528\uff0c\u5bfc\u81f4\u67d0\u4e9b\u6709\u6f0f\u6d1e\u7684\u6846\u67b6\u4e0d\u597d\u5347\u7ea7\u3002<\/p>\n

\u6211\u8054\u60f3\u5230\u4e86 Spring \u4e2d\u7684\u4e8b\u52a1\u6ce8\u89e3\uff0c\u5f02\u6b65\u6ce8\u89e3\u3002\u6211\u4eec\u5e94\u8be5\u5c06\u4e1a\u52a1\u4ee3\u7801\uff0c\u4e0e\u5206\u5e03\u5f0f\u9501\u5206\u79bb\u3002\u4ece\u800c\u5b9e\u73b0\u4e1a\u52a1\u4ee3\u7801\u4e0e\u516c\u5171\u5206\u5e03\u5f0f\u9501\u4ee3\u7801\u4e4b\u95f4\u7684\u89e3\u8026\u3002<\/p>\n

\u4e8e\u662f\uff0c\u6211\u4eec\u6a21\u4eff\u5e76\u5b9e\u73b0\u4e86\u4e00\u4e2a\u57fa\u4e8e Redisson \u5206\u5e03\u5f0f\u9501\u7684\u6ce8\u89e3\uff0c\u8001\u597d\u7528\u4e86\uff0c\u5206\u4eab\u7ed9\u5927\u5bb6\u3002<\/p>\n

\n

\u5728\u4e00\u4e9b\u5e76\u53d1\u7684\u573a\u666f\uff0c\u4e3a\u4e86\u4fdd\u8bc1\u63a5\u53e3\u6267\u884c\u7684\u4e00\u81f4\u6027\uff0c\u901a\u5e38\u91c7\u7528\u52a0\u9501\u7684\u65b9\u5f0f\uff0c\u56e0\u4e3a\u670d\u52a1\u662f\u5206\u5e03\u5f0f\u90e8\u7f72\u6a21\u5f0f\uff0c\u672c\u5730\u9501 Reentrantlock<\/a> \u548c Synchnorized \u8fd9\u4e9b\u5c31\u5148\u653e\u5230\u4e00\u8fb9\u4e86\u3002Redis \u7684 setnx \u9501\u5b58\u5728\u65e0\u6cd5\u62b1\u4fdd\u8bc1\u539f\u5b50\u6027\u7684\u95ee\u9898\u5c31\u6682\u65f6\u6401\u4e14\u5230\u4e00\u8fb9\uff0c\u76f4\u63a5\u4e0a\u5927\u62db Redisson \u5206\u5e03\u5f0f\u9501\u3002<\/p>\n

Redisson\u5206\u5e03\u5f0f\u9501\u5e38\u89c4\u4f7f\u7528<\/span><\/h2>\n

\u5173\u4e8e Redisson \u7684\u4e00\u4e9b\u57fa\u672c\u6982\u5ff5\uff0c\u672c\u6587\u5c31\u4e0d\u505a\u592a\u8be6\u7ec6\u7684\u8bf4\u660e\u4e86\uff0c\u6709\u5174\u8da3\u7684\u5c0f\u4f19\u4f34\u53ef\u4ee5\u81ea\u5df1\u53bb\u4e86\u89e3\u4e0b\uff0c\u672c\u6587\u4e3b\u8981\u5185\u5bb9\u662f\u6ce8\u89e3\u90e8\u5206\u7684\u5b9e\u73b0\u3002<\/p>\n

\u4e0b\u9762\u6211\u4eec\u5148\u8bf4\u4e0b Redisson \u52a0\u9501\u7684\u5e38\u89c4\u4f7f\u7528\u3002Redisson<\/a> \u5206\u5e03\u5f0f\u9501\u662f\u57fa\u4e8e Redis \u7684 Rlock \u9501\uff0c\u5b9e\u73b0\u4e86 JavaJUC \u5305\u4e0b\u7684 Lock \u63a5\u53e3\u3002<\/p>\n

Lock<\/span><\/h3>\n
public<\/span>\u00a0void<\/span>\u00a0getLock<\/span>()<\/span><\/span>{\n\u00a0\u00a0\u00a0\u00a0\/\/\u83b7\u53d6\u9501<\/span>\n\u00a0\u00a0\u00a0\u00a0RLock\u00a0lock\u00a0=\u00a0redisson.getLock(\"Lxlxxx_Lock\"<\/span>);\n\u00a0\u00a0\u00a0\u00a0try<\/span>\u00a0{\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/\u00a02.\u52a0\u9501<\/span>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0lock.lock();\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/\u00a0\u8bbe\u7f6e\u7684\u81ea\u52a8\u89e3\u9501\u65f6\u95f4\u4e00\u5b9a\u8981\u5927\u4e8e\u4e1a\u52a1\u6267\u884c\u65f6\u95f4\uff0c\u56e0\u4e3a\u5728\u9501\u65f6\u95f4\u5230\u4e86\u4ee5\u540e\uff0c\u4e0d\u4f1a\u81ea\u52a8\u7eed\u671f<\/span>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/\u00a0lock.lock(10,\u00a0TimeUnit.SECONDS);<\/span>\n\u00a0\u00a0\u00a0\u00a0}\u00a0catch<\/span>\u00a0(InterruptedException\u00a0e)\u00a0{\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0e.getStackTrace();\n\u00a0\u00a0\u00a0\u00a0}\u00a0finally<\/span>\u00a0{\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/\u00a03.\u89e3\u9501<\/span>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0lock.unlock();\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0System.out.println(\"Finally\uff0c\u91ca\u653e\u9501\u6210\u529f\"<\/span>);\n\u00a0\u00a0\u00a0\u00a0}\n<\/code><\/pre>\n
getLock \u83b7\u53d6\u9501\uff0clock.lock \u8fdb\u884c\u52a0\u9501\uff0c\u4f1a\u51fa\u73b0\u7684\u95ee\u9898\u5c31\u662f lock \u62ff\u4e0d\u5230\u9501\u4e00\u76f4\u7b49\u5f85\uff0c\u4f1a\u8fdb\u5165\u963b\u585e\u72b6\u6001\uff0c\u663e\u7136\u8fd9\u6837\u662f\u4e0d\u597d\u7684\u3002<\/p>\n
TryLock<\/span><\/h3>\n
\u8fd4\u56de boolean \u7c7b\u578b\uff0c\u548c Reentrantlock \u7684 tryLock \u662f\u4e00\u4e2a\u610f\u601d\uff0c\u5c1d\u8bd5\u83b7\u53d6\u9501\uff0c\u83b7\u53d6\u5230\u5c31\u8fd4\u56de true\uff0c\u83b7\u53d6\u5931\u8d25\u5c31\u8fd4\u56de false\uff0c\u4e0d\u4f1a\u4f7f\u83b7\u4e0d\u5230\u9501\u7684\u7ebf\u7a0b\u4e00\u76f4\u5904\u4e8e\u7b49\u5f85\u72b6\u6001\uff0c\u8fd4\u56defalse\u53ef\u4ee5\u7ee7\u7eed\u6267\u884c\u4e0b\u9762\u7684\u4e1a\u52a1\u903b\u8f91\uff0c\u5f53\u7136 Ression \u9501\u5185\u90e8\u4e5f\u6d89\u53ca\u5230 watchDog \u770b\u95e8\u72d7\u673a\u5236(https:\/\/t.zsxq.com\/104xTbTKd)\uff0c\u4e3b\u8981\u4f5c\u7528\u5c31\u662f\u7ed9\u5feb\u8fc7\u671f\u7684\u9501\u8fdb\u884c\u7eed\u671f\uff0c\u4e3b\u8981\u7528\u9014\u5c31\u662f\u4f7f\u62ff\u5230\u9501\u7684\u6709\u9650\u65f6\u95f4\u8ba9\u4e1a\u52a1\u6267\u884c\u5b8c\uff0c\u518d\u8fdb\u884c\u9501\u91ca\u653e\u3002<\/p>\n
RLock\u00a0lock\u00a0=\u00a0redisson.getLock(name);\ntry<\/span>\u00a0{\n\u00a0\u00a0\u00a0\u00a0if<\/span>\u00a0(lock.tryLock(2<\/span>,\u00a010<\/span>,\u00a0TimeUnit.SECONDS))\u00a0{\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/\u6267\u884c\u4e1a\u52a1\u903b\u8f91<\/span>\n\u00a0\u00a0\u00a0\u00a0}\u00a0else<\/span>\u00a0{\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0System.out.println(\"\u5df2\u5b58\u5728\"<\/span>);\n\u00a0\u00a0\u00a0\u00a0}\n}\u00a0catch<\/span>\u00a0(InterruptedException\u00a0e)\u00a0{\n\u00a0\u00a0\u00a0\u00a0e.printStackTrace();\n}\u00a0finally<\/span>\u00a0{\n\u00a0\u00a0\u00a0\u00a0\/\/\u00a0\u5224\u65ad\u5f53\u524d\u7ebf\u7a0b\u6301\u6709\u7684\u9501\u662f\u4e0d\u662f\u5904\u4e8e\u9501\u5b9a\u72b6\u6001\uff0c\u9501\u5b9a\u72b6\u6001\u518d\u8fdb\u884c\u91ca\u653e<\/span>\n\u00a0\u00a0\u00a0\u00a0if<\/span>\u00a0(this<\/span>.redissonLock.isHeldByCurrentThread(lockName))\u00a0{\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0this<\/span>.redissonLock.unlock(lockName);\n\u00a0\u00a0\u00a0\u00a0}\n}\n<\/code><\/pre>\n
\u81ea\u5b9a\u4e49\u6ce8\u89e3\u5b9e\u73b0\u9501\u673a\u5236<\/span><\/h2>\n
\u901a\u5e38\u6211\u4eec\u90fd\u4f1a\u5c06 redisson \u5b9e\u4f8b\u6ce8\u5165\u5230\u65b9\u6cd5\u7c7b\u91cc\u9762\uff0c\u5982\u679c\u7528\u9501\u7684\u5730\u65b9\u6bd4\u8f83\u591a\uff0c\u4f1a\u53d1\u73b0\uff0c\u5230\u5904\u90fd\u662f\u9501\u7684\u76f8\u5173\u64cd\u4f5c\u4ee3\u7801\u3002\u8fd9\u4e9b\u4ee3\u7801\u90fd\u662f\u91cd\u590d\u4ee3\u7801\uff0c\u6839\u636e\u300a\u91cd\u6784\u300b\u7b49\u4e66\u4e2d\u7684\u6307\u5bfc\uff0c\u6211\u4eec\u5e94\u8be5\u91c7\u7528 AOP \u5207\u9762\u7684\u65b9\u5f0f\uff0c\u53ea\u9700\u8981\u901a\u8fc7\u6ce8\u89e3\u7684\u65b9\u5f0f\u5c31\u80fd\u5c06\u65b9\u6cd5\u8fdb\u884c\u52a0\u9501\u5904\u7406\u3002<\/p>\n
\u662f\u65f6\u5019\u5c55\u793a\u771f\u6b63\u7684\u6280\u672f\u4e86\uff0c\u662f\u65f6\u5019\u5bf9\u8c03\u7528\u52a0\u9501\u65b9\u6cd5\u8fdb\u884c\u62bd\u8c61\u4e86\u3002<\/p>\n
\u81ea\u5b9a\u4e49\u6ce8\u89e3<\/span><\/h3>\n
@Documented<\/span>\n@Inherited<\/span>\n@Retention<\/span>(RetentionPolicy.RUNTIME)\n@Target<\/span>({ElementType.METHOD})\npublic<\/span>\u00a0@interface<\/span>\u00a0DistributedLock\u00a0{\n\u00a0\u00a0\u00a0\u00a0String\u00a0key<\/span>()<\/span>\u00a0default<\/span>\u00a0\"\"<\/span>;\n\n\u00a0\u00a0\u00a0\u00a0int<\/span>\u00a0leaseTime<\/span>()<\/span>\u00a0default<\/span>\u00a010<\/span>;\n\n\u00a0\u00a0\u00a0\u00a0boolean<\/span>\u00a0autoRelease<\/span>()<\/span>\u00a0default<\/span>\u00a0true<\/span><\/span>;\n\n\u00a0\u00a0\u00a0\u00a0String\u00a0errorDesc<\/span>()<\/span>\u00a0default<\/span>\u00a0\"\u7cfb\u7edf\u6b63\u5e38\u5904\u7406\uff0c\u8bf7\u7a0d\u540e\u63d0\u4ea4\"<\/span>;\n\n\u00a0\u00a0\u00a0\u00a0int<\/span>\u00a0waitTime<\/span>()<\/span>\u00a0default<\/span>\u00a01<\/span>;\n}\n<\/code><\/pre>\n
\u5207\u9762\u7c7b\u5b9e\u73b0<\/span><\/h3>\n
@Aspect<\/span>\n@Component<\/span>\npublic<\/span>\u00a0class<\/span>\u00a0DistributedLockHandler<\/span>\u00a0<\/span>{\n\u00a0\u00a0\u00a0\u00a0private<\/span>\u00a0static<\/span>\u00a0final<\/span>\u00a0Logger\u00a0log\u00a0=\u00a0LoggerFactory.getLogger(DistributedLockHandler.class<\/span>)<\/span>;\n\u00a0\u00a0\u00a0\u00a0@Autowired<\/span>\n\u00a0\u00a0\u00a0\u00a0RedissonLock\u00a0redissonLock;\n\n\u00a0\u00a0\u00a0\u00a0public<\/span>\u00a0DistributedLockHandler<\/span>()<\/span>\u00a0<\/span>{\n\u00a0\u00a0\u00a0\u00a0}\n\n\u00a0\u00a0\u00a0\u00a0@Around<\/span>(\"@annotation(distributedLock)\"<\/span>)\n\u00a0\u00a0\u00a0\u00a0public<\/span>\u00a0Object\u00a0around<\/span>(ProceedingJoinPoint\u00a0joinPoint,\u00a0DistributedLock\u00a0distributedLock)<\/span>\u00a0throws<\/span>\u00a0Throwable\u00a0<\/span>{\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0String\u00a0lockName\u00a0=\u00a0this<\/span>.getRedisKey(joinPoint,\u00a0distributedLock);\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0int<\/span>\u00a0leaseTime\u00a0=\u00a0distributedLock.leaseTime();\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0String\u00a0errorDesc\u00a0=\u00a0distributedLock.errorDesc();\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0int<\/span>\u00a0waitTime\u00a0=\u00a0distributedLock.waitTime();\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Object\u00a0var8;\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0try<\/span>\u00a0{\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0boolean<\/span>\u00a0lock\u00a0=\u00a0this<\/span>.redissonLock.tryLock(lockName,\u00a0(long<\/span>)leaseTime,\u00a0(long<\/span>)waitTime);\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0if<\/span>\u00a0(!lock)\u00a0{\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0throw<\/span>\u00a0new<\/span>\u00a0RuntimeException(errorDesc);\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0var8\u00a0=\u00a0joinPoint.proceed();\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}\u00a0catch<\/span>\u00a0(Throwable\u00a0var12)\u00a0{\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0log.error(\"error\u3002\u3002\u3002\u3002\"<\/span>,\u00a0var12);\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0throw<\/span>\u00a0var12;\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}\u00a0finally<\/span>\u00a0{\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0if<\/span>\u00a0(this<\/span>.redissonLock.isHeldByCurrentThread(lockName))\u00a0{\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0this<\/span>.redissonLock.unlock(lockName);\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0return<\/span>\u00a0var8;\n\u00a0\u00a0\u00a0\u00a0}\n\n\n\u00a0\u00a0\u00a0\u00a0\/**\n\u00a0\u00a0\u00a0\u00a0\u00a0*\u00a0\u00a0\u83b7\u53d6\u52a0\u9501\u7684key\n\u00a0\u00a0\u00a0\u00a0\u00a0*\u00a0@param<\/span>\u00a0joinPoint\n\u00a0\u00a0\u00a0\u00a0\u00a0*\u00a0@param<\/span>\u00a0distributedLock\n\u00a0\u00a0\u00a0\u00a0\u00a0*\u00a0@return<\/span>\n\u00a0\u00a0\u00a0\u00a0\u00a0*\/<\/span>\n\u00a0\u00a0\u00a0\u00a0private<\/span>\u00a0String\u00a0getRedisKey<\/span>(ProceedingJoinPoint\u00a0joinPoint,\u00a0DistributedLock\u00a0distributedLock)<\/span>\u00a0<\/span>{\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0String\u00a0key\u00a0=\u00a0distributedLock.key();\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Object[]\u00a0parameterValues\u00a0=\u00a0joinPoint.getArgs();\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0MethodSignature\u00a0signature\u00a0=\u00a0(MethodSignature)joinPoint.getSignature();\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Method\u00a0method\u00a0=\u00a0signature.getMethod();\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0DefaultParameterNameDiscoverer\u00a0nameDiscoverer\u00a0=\u00a0new<\/span>\u00a0DefaultParameterNameDiscoverer();\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0String[]\u00a0parameterNames\u00a0=\u00a0nameDiscoverer.getParameterNames(method);\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0if<\/span>\u00a0(StringUtils.isEmpty(key))\u00a0{\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0if<\/span>\u00a0(parameterNames\u00a0!=\u00a0null<\/span>\u00a0&&\u00a0parameterNames.length\u00a0>\u00a00<\/span>)\u00a0{\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0StringBuffer\u00a0sb\u00a0=\u00a0new<\/span>\u00a0StringBuffer();\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0int<\/span>\u00a0i\u00a0=\u00a00<\/span>;\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0for<\/span>(int<\/span>\u00a0len\u00a0=\u00a0parameterNames.length;\u00a0i\u00a0<\u00a0len;\u00a0++i)\u00a0{\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0sb.append(parameterNames[i]).append(\"\u00a0=\u00a0\"<\/span>).append(parameterValues[i]);\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0key\u00a0=\u00a0sb.toString();\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}\u00a0else<\/span>\u00a0{\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0key\u00a0=\u00a0\"redissionLock\"<\/span>;\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0return<\/span>\u00a0key;\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}\u00a0else<\/span>\u00a0{\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0SpelExpressionParser\u00a0parser\u00a0=\u00a0new<\/span>\u00a0SpelExpressionParser();\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Expression\u00a0expression\u00a0=\u00a0parser.parseExpression(key);\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0if<\/span>\u00a0(parameterNames\u00a0!=\u00a0null<\/span>\u00a0&&\u00a0parameterNames.length\u00a0!=\u00a00<\/span>)\u00a0{\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0EvaluationContext\u00a0evaluationContext\u00a0=\u00a0new<\/span>\u00a0StandardEvaluationContext();\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0for<\/span>(int<\/span>\u00a0i\u00a0=\u00a00<\/span>;\u00a0i\u00a0<\u00a0parameterNames.length;\u00a0++i)\u00a0{\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0evaluationContext.setVariable(parameterNames[i],\u00a0parameterValues[i]);\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0try<\/span>\u00a0{\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Object\u00a0expressionValue\u00a0=\u00a0expression.getValue(evaluationContext);\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0return<\/span>\u00a0expressionValue\u00a0!=\u00a0null<\/span>\u00a0&&\u00a0!\"\"<\/span>.equals(expressionValue.toString())\u00a0?\u00a0expressionValue.toString()\u00a0:\u00a0key;\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}\u00a0catch<\/span>\u00a0(Exception\u00a0var13)\u00a0{\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0return<\/span>\u00a0key;\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}\u00a0else<\/span>\u00a0{\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0return<\/span>\u00a0key;\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}\n\u00a0\u00a0\u00a0\u00a0}\n}\n<\/code><\/pre>\n
\u5177\u4f53\u4f7f\u7528<\/span><\/h3>\n