\u67e5\u770b\u5e26\u6709Synchronized\u8bed\u53e5\u5757\u7684class\u6587\u4ef6\u53ef\u4ee5\u770b\u5230\u5728\u540c\u6b65\u4ee3\u7801\u5757\u7684\u8d77\u59cb\u4f4d\u7f6e\u63d2\u5165\u4e86moniterenter\u6307\u4ee4\uff0c\u5728\u540c\u6b65\u4ee3\u7801\u5757\u7ed3\u675f\u7684\u4f4d\u7f6e\u63d2\u5165\u4e86monitorexit\u6307\u4ee4\u3002(JVM\u9700\u8981\u4fdd\u8bc1\u6bcf\u4e00\u4e2amonitorenter\u90fd\u6709\u4e00\u4e2amonitorexit\u4e0e\u4e4b\u76f8\u5bf9\u5e94\uff0c\u4f46\u6bcf\u4e2amonitorexit\u4e0d\u4e00\u5b9a\u90fd\u6709\u4e00\u4e2amonitorenter)
\n\u4f46\u662f\u67e5\u770b\u540c\u6b65\u65b9\u6cd5\u7684class\u6587\u4ef6\u65f6\uff0c\u540c\u6b65\u65b9\u6cd5\u5e76\u6ca1\u6709\u901a\u8fc7\u6307\u4ee4monitorenter\u548cmonitorexit\u6765\u5b8c\u6210\uff0c\u800c\u88ab\u7ffb\u8bd1\u6210\u666e\u901a\u7684\u65b9\u6cd5\u8c03\u7528\u548c\u8fd4\u56de\u6307\u4ee4\uff0c\u53ea\u662f\u5728\u5176\u5e38\u91cf\u6c60\u4e2d\u591a\u4e86ACC_SYNCHRONIZED\u6807\u793a\u7b26\u3002JVM\u5c31\u662f\u6839\u636e\u8be5\u6807\u793a\u7b26\u6765\u5b9e\u73b0\u65b9\u6cd5\u7684\u540c\u6b65\u7684\uff1a\u5f53\u65b9\u6cd5\u8c03\u7528\u65f6\uff0c\u8c03\u7528\u6307\u4ee4\u5c06\u4f1a\u68c0\u67e5\u65b9\u6cd5\u7684 ACC_SYNCHRONIZED \u8bbf\u95ee\u6807\u5fd7\u662f\u5426\u88ab\u8bbe\u7f6e\uff0c\u5982\u679c\u8bbe\u7f6e\u4e86\uff0c\u6267\u884c\u7ebf\u7a0b\u5c06\u5148\u83b7\u53d6monitor\uff0c\u83b7\u53d6\u6210\u529f\u4e4b\u540e\u624d\u80fd\u6267\u884c\u65b9\u6cd5\u4f53\uff0c\u65b9\u6cd5\u6267\u884c\u5b8c\u540e\u518d\u91ca\u653emonitor\u3002\u5728\u65b9\u6cd5\u6267\u884c\u671f\u95f4\uff0c\u5176\u4ed6\u4efb\u4f55\u7ebf\u7a0b\u90fd\u65e0\u6cd5\u518d\u83b7\u5f97\u540c\u4e00\u4e2amonitor\u5bf9\u8c61\u3002 \u5176\u5b9e\u672c\u8d28\u4e0a\u6ca1\u6709\u533a\u522b\uff0c\u53ea\u662f\u65b9\u6cd5\u7684\u540c\u6b65\u662f\u4e00\u79cd\u9690\u5f0f\u7684\u65b9\u5f0f\u6765\u5b9e\u73b0\uff0c\u65e0\u9700\u901a\u8fc7\u5b57\u8282\u7801\u6765\u5b8c\u6210\u3002<\/p>\n
synchronized\u7684\u5b9e\u73b0\u539f\u7406\u548c\u5e94\u7528\u603b\u7ed3
\n\uff081\uff09synchronized\u540c\u6b65\u4ee3\u7801\u5757\uff1asynchronized\u5173\u952e\u5b57\u7ecf\u8fc7\u7f16\u8bd1\u4e4b\u540e\uff0c\u4f1a\u5728\u540c\u6b65\u4ee3\u7801\u5757\u524d\u540e\u5206\u522b\u5f62\u6210monitorenter\u548cmonitorexit\u5b57\u8282\u7801\u6307\u4ee4\uff0c\u5728\u6267\u884cmonitorenter\u6307\u4ee4\u7684\u65f6\u5019\uff0c\u9996\u5148\u5c1d\u8bd5\u83b7\u53d6\u5bf9\u8c61\u7684\u9501\uff0c\u5982\u679c\u8fd9\u4e2a\u9501\u6ca1\u6709\u88ab\u9501\u5b9a\u6216\u8005\u5f53\u524d\u7ebf\u7a0b\u5df2\u7ecf\u62e5\u6709\u4e86\u90a3\u4e2a\u5bf9\u8c61\u7684\u9501\uff0c\u9501\u7684\u8ba1\u6570\u5668\u5c31\u52a01\uff0c\u5728\u6267\u884cmonitorexit\u6307\u4ee4\u65f6\u4f1a\u5c06\u9501\u7684\u8ba1\u6570\u5668\u51cf1\uff0c\u5f53\u51cf\u4e3a0\u7684\u65f6\u5019\u5c31\u91ca\u653e\u9501\u3002\u5982\u679c\u83b7\u53d6\u5bf9\u8c61\u9501\u4e00\u76f4\u5931\u8d25\uff0c\u90a3\u5f53\u524d\u7ebf\u7a0b\u5c31\u8981\u963b\u585e\u7b49\u5f85\uff0c\u76f4\u5230\u5bf9\u8c61\u9501\u88ab\u53e6\u4e00\u4e2a\u7ebf\u7a0b\u91ca\u653e\u4e3a\u6b62\u3002
\n\uff082\uff09\u540c\u6b65\u65b9\u6cd5\uff1a\u65b9\u6cd5\u7ea7\u7684\u540c\u6b65\u662f\u9690\u5f0f\u7684\uff0c\u65e0\u987b\u901a\u8fc7\u5b57\u8282\u7801\u6307\u4ee4\u6765\u63a7\u5236\uff0cJVM\u53ef\u4ee5\u4ece\u65b9\u6cd5\u5e38\u91cf\u6c60\u7684\u65b9\u6cd5\u8868\u7ed3\u6784\u4e2d\u7684ACC_SYNCHRONIZED\u8bbf\u95ee\u6807\u5fd7\u5f97\u77e5\u4e00\u4e2a\u65b9\u6cd5\u662f\u5426\u58f0\u660e\u4e3a\u540c\u6b65\u65b9\u6cd5\u3002\u5f53\u65b9\u6cd5\u8c03\u7528\u7684\u65f6\uff0c\u8c03\u7528\u6307\u4ee4\u4f1a\u68c0\u67e5\u65b9\u6cd5\u7684ACC_SYNCHRONIZED\u8bbf\u95ee\u6807\u5fd7\u662f\u5426\u88ab\u8bbe\u7f6e\uff0c\u5982\u679c\u8bbe\u7f6e\u4e86\uff0c\u6267\u884c\u7ebf\u7a0b\u5c31\u8981\u6c42\u5148\u6301\u6709monitor\u5bf9\u8c61\uff0c\u7136\u540e\u624d\u80fd\u6267\u884c\u65b9\u6cd5\uff0c\u6700\u540e\u5f53\u65b9\u6cd5\u6267\u884c\u5b8c\uff08\u65e0\u8bba\u662f\u6b63\u5e38\u5b8c\u6210\u8fd8\u662f\u975e\u6b63\u5e38\u5b8c\u6210\uff09\u65f6\u91ca\u653emonitor\u5bf9\u8c61\u3002\u5728\u65b9\u6cd5\u6267\u884c\u671f\u95f4\uff0c\u6267\u884c\u7ebf\u7a0b\u6301\u6709\u4e86\u7ba1\u7a0b\uff0c\u5176\u4ed6\u7ebf\u7a0b\u90fd\u65e0\u6cd5\u518d\u6b21\u83b7\u53d6\u540c\u4e00\u4e2a\u7ba1\u7a0b\u3002<\/p>\n
moniterenter\u548cmoniterexit\u6307\u4ee4\u662f\u901a\u8fc7monitor\u5bf9\u8c61\u5b9e\u73b0\u7684\u3002
\nSynchronized\u7684\u5b9e\u73b0\u4e0d\u4ec5\u4e0emonitor\u5bf9\u8c61\u6709\u5173\uff0c\u8fd8\u4e0e\u53e6\u4e00\u4e2a\u4e1c\u897f\u5bc6\u5207\u76f8\u5173\uff0c\u90a3\u5c31\u662f\u5bf9\u8c61\u5934\u3002<\/p>\n
\u4e0b\u9762\u6211\u4eec\u5c31\u6765\u770b\u4e0bJava\u5bf9\u8c61\u5934\u548cmonitor\u5bf9\u8c61\u4e0eSynchronized\u7684\u5b9e\u73b0\u6709\u7740\u600e\u6837\u7684\u5173\u7cfb\u3002<\/p>\n
JVM\u89c4\u8303\u4e2d\u5bf9monitorenter\u548cmonitorexit\u6307\u4ee4\u7684\u63cf\u8ff0\u5982\u4e0b\uff1a
\nmonitorenter \uff1a
\nEach object is associated with a monitor. A monitor is locked if and only if it has an owner. The thread that executes monitorenter attempts to gain ownership of the monitor associated with objectref, as follows:
\n\u2022 If the entry count of the monitor associated with objectref is zero, the thread enters the monitor and sets its entry count to one. The thread is then the owner of the monitor.
\n\u2022 If the thread already owns the monitor associated with objectref, it reenters the monitor, incrementing its entry count.
\n\u2022 If another thread already owns the monitor associated with objectref, the thread blocks until the monitor\u2019s entry count is zero, then tries again to gain ownership.<\/p>\n
\u8fd9\u6bb5\u8bdd\u7684\u5927\u6982\u610f\u601d\u4e3a\uff1a
\n\u6bcf\u4e2a\u5bf9\u8c61\u90fd\u6709\u4e00\u4e2a\u76d1\u89c6\u5668\u9501(monitor)\u4e0e\u4e4b\u5bf9\u5e94\u3002\u5f53monitor\u88ab\u5360\u7528\u65f6\u5c31\u4f1a\u5904\u4e8e\u9501\u5b9a\u72b6\u6001\uff0c\u7ebf\u7a0b\u6267\u884cmonitorenter\u6307\u4ee4\u65f6\u5c1d\u8bd5\u83b7\u53d6monitor\u7684\u6240\u6709\u6743\uff0c\u8fc7\u7a0b\u5982\u4e0b\uff1a
\n1\u3001\u5982\u679cmonitor\u7684\u8fdb\u5165\u6570\u4e3a0\uff0c\u5219\u8be5\u7ebf\u7a0b\u8fdb\u5165monitor\uff0c\u7136\u540e\u5c06\u8fdb\u5165\u6570\u8bbe\u7f6e\u4e3a1\uff0c\u8be5\u7ebf\u7a0b\u5373\u4e3amonitor\u7684\u6240\u6709\u8005\u3002
\n2\u3001\u5982\u679c\u7ebf\u7a0b\u5df2\u7ecf\u5360\u6709\u8be5monitor\uff0c\u53ea\u662f\u91cd\u65b0\u8fdb\u5165\uff0c\u5219\u8fdb\u5165monitor\u7684\u8fdb\u5165\u6570\u52a01.
\n3.\u5982\u679c\u5176\u4ed6\u7ebf\u7a0b\u5df2\u7ecf\u5360\u7528\u4e86monitor\uff0c\u5219\u8be5\u7ebf\u7a0b\u8fdb\u5165\u963b\u585e\u72b6\u6001\uff0c\u76f4\u5230monitor\u7684\u8fdb\u5165\u6570\u4e3a0\uff0c\u518d\u91cd\u65b0\u5c1d\u8bd5\u83b7\u53d6monitor\u7684\u6240\u6709\u6743\u3002<\/p>\n
monitorexit\uff1a\u3000
\nThe thread that executes monitorexit must be the owner of the monitor associated with the instance referenced by objectref.
\nThe thread decrements the entry count of the monitor associated with objectref. If as a result the value of the entry count is zero, the thread exits the monitor and is no longer its owner. Other threads that are blocking to enter the monitor are allowed to attempt to do so.<\/p>\n
\u8fd9\u6bb5\u8bdd\u7684\u5927\u6982\u610f\u601d\u4e3a\uff1a
\n\u6267\u884cmonitorexit\u7684\u7ebf\u7a0b\u5fc5\u987b\u662fobjectref\u6240\u5bf9\u5e94\u7684monitor\u7684\u6240\u6709\u8005\u3002
\n\u6307\u4ee4\u6267\u884c\u65f6\uff0cmonitor\u7684\u8fdb\u5165\u6570\u51cf1\uff0c\u5982\u679c\u51cf1\u540e\u8fdb\u5165\u6570\u4e3a0\uff0c\u90a3\u7ebf\u7a0b\u9000\u51famonitor\uff0c\u4e0d\u518d\u662f\u8fd9\u4e2amonitor\u7684\u6240\u6709\u8005\u3002\u5176\u4ed6\u88ab\u8fd9\u4e2amonitor\u963b\u585e\u7684\u7ebf\u7a0b\u53ef\u4ee5\u5c1d\u8bd5\u53bb\u83b7\u53d6\u8fd9\u4e2amonitor\u7684\u6240\u6709\u6743\u3002<\/p>\n
\u901a\u8fc7\u8fd9\u4e24\u4e2a\u6307\u4ee4\u6211\u4eec\u5e94\u8be5\u80fd\u5f88\u6e05\u695a\u7684\u770b\u51faSynchronized\u7684\u5b9e\u73b0\u539f\u7406\uff0cSynchronized\u7684\u8bed\u4e49\u5e95\u5c42\u662f\u901a\u8fc7\u4e00\u4e2amonitor\u7684\u5bf9\u8c61\u6765\u5b8c\u6210\uff0c\u5176\u5b9ewait\/notify\u7b49\u65b9\u6cd5\u4e5f\u4f9d\u8d56\u4e8emonitor\u5bf9\u8c61\uff0c\u8fd9\u5c31\u662f\u4e3a\u4ec0\u4e48\u53ea\u6709\u5728\u540c\u6b65\u7684\u5757\u6216\u8005\u65b9\u6cd5\u4e2d\u624d\u80fd\u8c03\u7528wait\/notify\u7b49\u65b9\u6cd5\uff0c\u5426\u5219\u4f1a\u629b\u51fajava.lang.IllegalMonitorStateException\u7684\u5f02\u5e38\u7684\u539f\u56e0\u3002
\nJava\u5bf9\u8c61\u5934
\n\u4e0b\u9762\u91cd\u70b9\u8bf4\u4e0bjava\u5bf9\u8c61\u5934\u3002<\/p>\n
\u4f17\u6240\u5468\u77e5Java\u4e2d\u4e07\u7269\u7686\u5bf9\u8c61\uff0c\u90a3\u5bf9\u8c61\u5728\u5185\u5b58\u4e2d\u662f\u600e\u4e48\u5b58\u50a8\u7684\u5462\uff1f<\/p>\n
\u6bcf\u4e2a\u5bf9\u8c61\u5206\u4e3a\u4e09\u5757\u533a\u57df:\u5bf9\u8c61\u5934\u3001\u5b9e\u4f8b\u6570\u636e\u548c\u5bf9\u9f50\u586b\u5145\u3002<\/p>\n
\u5bf9\u8c61\u5934\u5305\u542b\u4e24\u90e8\u5206\uff0c\u7b2c\u4e00\u90e8\u5206\u662fMark Word\uff0c\u7528\u4e8e\u5b58\u50a8\u5bf9\u8c61\u81ea\u8eab\u7684\u8fd0\u884c\u65f6\u6570\u636e\uff0c\u5982\u54c8\u5e0c\u7801\uff08HashCode\uff09\u3001GC\u5206\u4ee3\u5e74\u9f84\u3001\u9501\u72b6\u6001\u6807\u5fd7\u3001\u7ebf\u7a0b\u6301\u6709\u7684\u9501\u3001\u504f\u5411\u7ebf\u7a0b ID\u3001\u504f\u5411\u65f6\u95f4\u6233\u7b49\u7b49\uff0c\u8fd9\u4e00\u90e8\u5206\u5360\u4e00\u4e2a\u5b57\u8282\u3002\u7b2c\u4e8c\u90e8\u5206\u662fKlass Pointer\uff08\u7c7b\u578b\u6307\u9488\uff09\uff0c\u662f\u5bf9\u8c61\u6307\u5411\u5b83\u7684\u7c7b\u5143\u6570\u636e\u7684\u6307\u9488\uff0c\u865a\u62df\u673a\u901a\u8fc7\u8fd9\u4e2a\u6307\u9488\u6765\u786e\u5b9a\u8fd9\u4e2a\u5bf9\u8c61\u662f\u54ea\u4e2a\u7c7b\u7684\u5b9e\u4f8b\uff0c\u8fd9\u90e8\u5206\u4e5f\u5360\u4e00\u4e2a\u5b57\u8282\u3002(\u5982\u679c\u5bf9\u8c61\u662f\u6570\u7ec4\u7c7b\u578b\u7684\uff0c\u5219\u9700\u89813\u4e2a\u5b57\u8282\u6765\u5b58\u50a8\u5bf9\u8c61\u5934\uff0c\u56e0\u4e3a\u8fd8\u9700\u8981\u4e00\u4e2a\u5b57\u8282\u5b58\u50a8\u6570\u7ec4\u7684\u957f\u5ea6)
\n\u5b9e\u4f8b\u6570\u636e\u5b58\u653e\u7684\u662f\u7c7b\u5c5e\u6027\u6570\u636e\u4fe1\u606f\uff0c\u5305\u62ec\u7236\u7c7b\u7684\u5c5e\u6027\u4fe1\u606f\uff0c\u5982\u679c\u662f\u6570\u7ec4\u7684\u5b9e\u4f8b\u90e8\u5206\u8fd8\u5305\u62ec\u6570\u7ec4\u7684\u957f\u5ea6\uff0c\u8fd9\u90e8\u5206\u5185\u5b58\u63094\u5b57\u8282\u5bf9\u9f50\u3002
\n\u586b\u5145\u6570\u636e\u662f\u56e0\u4e3a\u865a\u62df\u673a\u8981\u6c42\u5bf9\u8c61\u8d77\u59cb\u5730\u5740\u5fc5\u987b\u662f8\u5b57\u8282\u7684\u6574\u6570\u500d\u3002\u586b\u5145\u6570\u636e\u4e0d\u662f\u5fc5\u987b\u5b58\u5728\u7684\uff0c\u4ec5\u4ec5\u662f\u4e3a\u4e86\u5b57\u8282\u5bf9\u9f50\u3002
\n\u5bf9\u8c61\u5934\u4fe1\u606f\u662f\u4e0e\u5bf9\u8c61\u81ea\u8eab\u5b9a\u4e49\u7684\u6570\u636e\u65e0\u5173\u7684\u989d\u5916\u5b58\u50a8\u6210\u672c\uff0c\u8003\u8651\u5230\u865a\u62df\u673a\u7684\u7a7a\u95f4\u6548\u7387\uff0cMark Word\u88ab\u8bbe\u8ba1\u6210\u4e00\u4e2a\u975e\u56fa\u5b9a\u7684\u6570\u636e\u7ed3\u6784\u4ee5\u4fbf\u5728\u6781\u5c0f\u7684\u7a7a\u95f4\u5185\u5b58\u50a8\u5c3d\u91cf\u591a\u7684\u4fe1\u606f\uff0c\u5b83\u4f1a\u6839\u636e\u5bf9\u8c61\u7684\u72b6\u6001\u590d\u7528\u81ea\u5df1\u7684\u5b58\u50a8\u7a7a\u95f4\u3002\u4f8b\u5982\u572832\u4f4d\u7684HotSpot\u865a\u62df\u673a \u4e2d\u5bf9\u8c61\u672a\u88ab\u9501\u5b9a\u7684\u72b6\u6001\u4e0b\uff0cMark Word\u768432\u4e2aBits\u7a7a\u95f4\u4e2d\u768425Bits\u7528\u4e8e\u5b58\u50a8\u5bf9\u8c61\u54c8\u5e0c\u7801(HashCode)\uff0c4Bits\u7528\u4e8e\u5b58\u50a8\u5bf9\u8c61\u5206\u4ee3\u5e74\u9f84\uff0c2Bits\u7528\u4e8e\u5b58\u50a8\u9501\u6807\u5fd7 \u4f4d\uff0c1Bit\u56fa\u5b9a\u4e3a0\uff0c\u5728\u5176\u4ed6\u72b6\u6001(\u8f7b\u91cf\u7ea7\u9501\u5b9a\u3001\u91cd\u91cf\u7ea7\u9501\u5b9a\u3001GC\u6807\u8bb0\u3001\u53ef\u504f\u5411)\u4e0b\u5bf9\u8c61\u7684\u5b58\u50a8\u5185\u5bb9\u5982\u4e0b\u8868\u6240\u793a\u3002<\/p>\n
Synchronized\u901a\u5e38\u88ab\u79f0\u4e3a\u91cd\u91cf\u7ea7\u9501\uff0c\u4f46\u662f1.6\u4e4b\u540e\u5bf9\u5176\u8fdb\u884c\u4f18\u5316\uff0c\u65b0\u589e\u4e86\u8f7b\u91cf\u7ea7\u9501\u548c\u504f\u5411\u9501\uff0c\u8fd9\u91cc\u91cd\u70b9\u8bf4\u4e0b\u91cd\u91cf\u7ea7\u9501\uff0c\u968f\u540e\u5bf9Synchronized\u7684\u4f18\u5316\u7b80\u5355\u4ecb\u7ecd\u4e0b\u3002<\/p>\n
\u4ece\u5bf9\u8c61\u5934\u7684\u5b58\u50a8\u5185\u5bb9\u53ef\u4ee5\u770b\u51fa\u9501\u7684\u72b6\u6001\u90fd\u4fdd\u5b58\u5728\u5bf9\u8c61\u5934\u4e2d\uff0cSynchronized\u4e5f\u4e0d\u4f8b\u5916\uff0c\u5f53\u5176\u4ece\u8f7b\u91cf\u7ea7\u9501\u81a8\u80c0\u4e3a\u91cd\u91cf\u7ea7\u9501\u65f6\uff0c\u9501\u6807\u8bc6\u4f4d\u4e3a10\uff0c\u5176\u4e2d\u6307\u9488\u6307\u5411\u7684\u662fmonitor\u5bf9\u8c61(\u4e5f\u79f0\u4e3a\u7ba1\u7a0b\u6216\u76d1\u89c6\u5668\u9501)\u7684\u8d77\u59cb\u5730\u5740\u3002<\/p>\n
\u5173\u4e8eSynchronized\u7684\u5b9e\u73b0\u5728java\u5bf9\u8c61\u5934\u91cc\u8f83\u4e3a\u7b80\u5355\uff0c\u53ea\u662f\u6539\u53d8\u4e00\u4e0b\u6807\u8bc6\u4f4d\uff0c\u5e76\u5c06\u6307\u9488\u6307\u5411monitor\u5bf9\u8c61\u7684\u8d77\u59cb\u5730\u5740\uff0c\u5176\u5b9e\u73b0\u7684\u91cd\u70b9\u662fmonitor\u5bf9\u8c61\u3002
\n\u4e0b\u9762\u4ecb\u7ecd\u4e0bmonitor\u5bf9\u8c61\u3002<\/p>\n
Monitor\u5bf9\u8c61
\n\u4ec0\u4e48\u662fMonitor\uff1f\u6211\u4eec\u53ef\u4ee5\u628a\u5b83\u7406\u89e3\u4e3a\u4e00\u4e2a\u540c\u6b65\u5de5\u5177\uff0c\u4e5f\u53ef\u4ee5\u63cf\u8ff0\u4e3a\u4e00\u79cd\u540c\u6b65\u673a\u5236\uff0c\u5b83\u901a\u5e38\u88ab\u63cf\u8ff0\u4e3a\u4e00\u4e2a\u5bf9\u8c61\u3002
\n\u5728Java\u865a\u62df\u673a(HotSpot)\u4e2d\uff0cmonitor\u662f\u7531ObjectMonitor\u5b9e\u73b0\u7684\uff0c\u5176\u4e3b\u8981\u6570\u636e\u7ed3\u6784\u5982\u4e0b(\u4f4d\u4e8eHotSpot\u865a\u62df\u673a\u6e90\u7801ObjectMonitor.hpp\u6587\u4ef6\uff0cC++\u5b9e\u73b0\u7684)
\nObjectMonitor\u4e2d\u6709\u51e0\u4e2a\u5173\u952e\u5c5e\u6027\uff0c<\/p>\n
_count\u7528\u6765\u8bb0\u5f55\u8be5\u7ebf\u7a0b\u83b7\u53d6\u9501\u7684\u6b21\u6570
\n_WaitSet\u5b58\u653e\u5904\u4e8ewait\u72b6\u6001\u7684\u7ebf\u7a0b\u961f\u5217
\n_EntryList\u5b58\u653e\u5904\u4e8e\u7b49\u5f85\u83b7\u53d6\u9501block\u72b6\u6001\u7684\u7ebf\u7a0b\u961f\u5217\uff0c\u5373\u88ab\u963b\u585e\u7684\u7ebf\u7a0b
\n_owner\u6307\u5411\u6301\u6709ObjectMonitor\u5bf9\u8c61\u7684\u7ebf\u7a0b
\n\u5f53\u591a\u4e2a\u7ebf\u7a0b\u540c\u65f6\u8bbf\u95ee\u4e00\u6bb5\u540c\u6b65\u4ee3\u7801\u65f6\uff0c\u9996\u5148\u4f1a\u8fdb\u5165_EntryList\u961f\u5217\u4e2d\uff0c\u5f53\u67d0\u4e2a\u7ebf\u7a0b\u83b7\u53d6\u5230\u5bf9\u8c61\u7684monitor\u540e\u8fdb\u5165_Owner\u533a\u57df\u5e76\u628amonitor\u4e2d\u7684_owner\u53d8\u91cf\u8bbe\u7f6e\u4e3a\u5f53\u524d\u7ebf\u7a0b\uff0c\u540c\u65f6monitor\u4e2d\u7684\u8ba1\u6570\u5668_count\u52a01\uff0c\u82e5\u7ebf\u7a0b\u8c03\u7528wait()\u65b9\u6cd5\uff0c\u5c06\u91ca\u653e\u5f53\u524d\u6301\u6709\u7684monitor\uff0c_owner\u53d8\u91cf\u6062\u590d\u4e3anull\uff0c_count\u81ea\u51cf1\uff0c\u540c\u65f6\u8be5\u7ebf\u7a0b\u8fdb\u5165_WaitSet\u96c6\u5408\u4e2d\u7b49\u5f85\u88ab\u5524\u9192\u3002\u82e5\u5f53\u524d\u7ebf\u7a0b\u6267\u884c\u5b8c\u6bd5\u4e5f\u5c06\u91ca\u653emonitor(\u9501)\u5e76\u590d\u4f4d\u53d8\u91cf\u7684\u503c\uff0c\u4ee5\u4fbf\u5176\u4ed6\u7ebf\u7a0b\u8fdb\u5165\u83b7\u53d6monitor(\u9501)\u3002\u5982\u4e0b\u56fe\u6240\u793a
\nSynchronized\u4f18\u5316
\n\u65e9\u671f\uff0cSynchronized\u5c5e\u4e8e\u91cd\u91cf\u7ea7\u9501\uff0c\u6548\u7387\u4f4e\u4e0b\uff0c\u56e0\u4e3a\u76d1\u89c6\u5668\u9501(monitor)\u662f\u4f9d\u8d56\u4e8e\u5e95\u5c42\u7684\u64cd\u4f5c\u7cfb\u7edf\u7684Mutex Lock\u6765\u5b9e\u73b0\u7684\uff0c\u800c\u64cd\u4f5c\u7cfb\u7edf\u5b9e\u73b0\u7ebf\u7a0b\u4e4b\u95f4\u7684\u5207\u6362\u65f6\u9700\u8981\u4ece\u7528\u6237\u6001\u8f6c\u6362\u5230\u6838\u5fc3\u6001\uff0c\u8fd9\u4e2a\u72b6\u6001\u4e4b\u95f4\u7684\u8f6c\u6362\u9700\u8981\u76f8\u5bf9\u6bd4\u8f83\u957f\u7684\u65f6\u95f4\uff0c\u65f6\u95f4\u6210\u672c\u76f8\u5bf9\u8f83\u9ad8\uff0c\u8fd9\u4e5f\u662f\u4e3a\u4ec0\u4e48\u65e9\u671f\u7684synchronized\u6548\u7387\u4f4e\u7684\u539f\u56e0\u3002\u5e86\u5e78\u7684\u662f\u5728Java 6\u4e4b\u540eJava\u5b98\u65b9\u5bf9\u4eceJVM\u5c42\u9762\u5bf9synchronized\u8f83\u5927\u4f18\u5316\uff0c\u6240\u4ee5\u73b0\u5728\u7684synchronized\u9501\u6548\u7387\u4e5f\u4f18\u5316\u5f97\u5f88\u4e0d\u9519\u4e86\uff0cJava 6\u4e4b\u540e\uff0c\u4e3a\u4e86\u51cf\u5c11\u83b7\u5f97\u9501\u548c\u91ca\u653e\u9501\u6240\u5e26\u6765\u7684\u6027\u80fd\u6d88\u8017\uff0c\u5f15\u5165\u4e86\u504f\u5411\u9501\u3001\u8f7b\u91cf\u7ea7\u9501\u548c\u81ea\u65cb\u9501\u7b49\u6982\u5ff5\uff0c\u63a5\u4e0b\u6765\u6211\u4eec\u5c06\u7b80\u5355\u4e86\u89e3\u4e00\u4e0bJava\u5b98\u65b9\u5728JVM\u5c42\u9762\u5bf9Synchronized\u9501\u7684\u4f18\u5316\u3002<\/p>\n
\u504f\u5411\u9501
\n\u5f15\u5165\u504f\u5411\u9501\u7684\u4e3b\u8981\u539f\u56e0\u662f\uff0c\u7ecf\u8fc7\u7814\u7a76\u53d1\u73b0\uff0c\u5728\u5927\u591a\u6570\u60c5\u51b5\u4e0b\uff0c\u9501\u4e0d\u4ec5\u4e0d\u5b58\u5728\u591a\u7ebf\u7a0b\u7ade\u4e89\uff0c\u800c\u4e14\u603b\u662f\u7531\u540c\u4e00\u7ebf\u7a0b\u591a\u6b21\u83b7\u5f97\uff0c\u56e0\u6b64\u4e3a\u4e86\u51cf\u5c11\u540c\u4e00\u7ebf\u7a0b\u83b7\u53d6\u9501(\u4f1a\u6d89\u53ca\u5230\u4e00\u4e9bCAS\u64cd\u4f5c,\u8017\u65f6)\u7684\u4ee3\u4ef7\u800c\u5f15\u5165\u504f\u5411\u9501\u3002
\n\u5f15\u5165\u7684\u4e3b\u8981\u76ee\u7684\u662f\uff0c\u4e3a\u4e86\u5728\u65e0\u591a\u7ebf\u7a0b\u7ade\u4e89\u7684\u60c5\u51b5\u4e0b\u5c3d\u91cf\u51cf\u5c11\u4e0d\u5fc5\u8981\u7684\u8f7b\u91cf\u7ea7\u9501\u6267\u884c\u8def\u5f84\u3002\u56e0\u4e3a\u8f7b\u91cf\u7ea7\u9501\u7684\u83b7\u53d6\u53ca\u91ca\u653e\u4f9d\u8d56\u591a\u6b21CAS\u539f\u5b50\u6307\u4ee4\uff0c\u800c\u504f\u5411\u9501\u53ea\u9700\u8981\u5728\u7f6e\u6362ThreadID\u7684\u65f6\u5019\u4f9d\u8d56\u4e00\u6b21CAS\u539f\u5b50\u6307\u4ee4\uff08\u7531\u4e8e\u4e00\u65e6\u51fa\u73b0\u591a\u7ebf\u7a0b\u7ade\u4e89\u7684\u60c5\u51b5\u5c31\u5fc5\u987b\u64a4\u9500\u504f\u5411\u9501\uff0c\u6240\u4ee5\u504f\u5411\u9501\u7684\u64a4\u9500\u64cd\u4f5c\u7684\u6027\u80fd\u635f\u8017\u5fc5\u987b\u5c0f\u4e8e\u8282\u7701\u4e0b\u6765\u7684CAS\u539f\u5b50\u6307\u4ee4\u7684\u6027\u80fd\u6d88\u8017\uff09\u3002
\n\u504f\u5411\u9501\u7684\u6838\u5fc3\u601d\u60f3\u662f\uff0c\u5982\u679c\u4e00\u4e2a\u7ebf\u7a0b\u83b7\u5f97\u4e86\u9501\uff0c\u90a3\u4e48\u9501\u5c31\u8fdb\u5165\u504f\u5411\u6a21\u5f0f\uff0c\u6b64\u65f6Mark Word \u7684\u7ed3\u6784\u4e5f\u53d8\u4e3a\u504f\u5411\u9501\u7ed3\u6784\uff0c\u5f53\u8fd9\u4e2a\u7ebf\u7a0b\u518d\u6b21\u8bf7\u6c42\u9501\u65f6\uff0c\u65e0\u9700\u518d\u505a\u4efb\u4f55\u540c\u6b65\u64cd\u4f5c\uff0c\u5373\u83b7\u53d6\u9501\u7684\u8fc7\u7a0b\uff0c\u8fd9\u6837\u5c31\u7701\u53bb\u4e86\u5927\u91cf\u6709\u5173\u9501\u7533\u8bf7\u7684\u64cd\u4f5c\uff0c\u4ece\u800c\u4e5f\u5c31\u63d0\u5347\u7a0b\u5e8f\u7684\u6027\u80fd\u3002\u6240\u4ee5\uff0c\u5bf9\u4e8e\u6ca1\u6709\u9501\u7ade\u4e89\u7684\u573a\u5408\uff0c\u504f\u5411\u9501\u6709\u5f88\u597d\u7684\u4f18\u5316\u6548\u679c\uff0c\u6bd5\u7adf\u6781\u6709\u53ef\u80fd\u8fde\u7eed\u591a\u6b21\u662f\u540c\u4e00\u4e2a\u7ebf\u7a0b\u7533\u8bf7\u76f8\u540c\u7684\u9501\u3002
\n\u4f46\u662f\u5bf9\u4e8e\u9501\u7ade\u4e89\u6bd4\u8f83\u6fc0\u70c8\u7684\u573a\u5408\uff0c\u504f\u5411\u9501\u5c31\u5931\u6548\u4e86\uff0c\u56e0\u4e3a\u8fd9\u6837\u573a\u5408\u6781\u6709\u53ef\u80fd\u6bcf\u6b21\u7533\u8bf7\u9501\u7684\u7ebf\u7a0b\u90fd\u662f\u4e0d\u76f8\u540c\u7684\uff0c\u56e0\u6b64\u8fd9\u79cd\u573a\u5408\u4e0b\u4e0d\u5e94\u8be5\u4f7f\u7528\u504f\u5411\u9501\uff0c\u5426\u5219\u4f1a\u5f97\u4e0d\u507f\u5931\uff0c\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u504f\u5411\u9501\u5931\u8d25\u540e\uff0c\u5e76\u4e0d\u4f1a\u7acb\u5373\u81a8\u80c0\u4e3a\u91cd\u91cf\u7ea7\u9501\uff0c\u800c\u662f\u5148\u5347\u7ea7\u4e3a\u8f7b\u91cf\u7ea7\u9501\u3002<\/p>\n
\u5176\u6267\u884c\u6d41\u7a0b\u4e3a\uff1a
\n\u83b7\u53d6\u9501<\/p>\n
\u68c0\u6d4bMark Word\u662f\u5426\u4e3a\u53ef\u504f\u5411\u72b6\u6001\uff0c\u5373\u662f\u5426\u4e3a\u504f\u5411\u95011\uff0c\u9501\u6807\u8bc6\u4f4d\u4e3a01\uff1b
\n\u82e5\u4e3a\u53ef\u504f\u5411\u72b6\u6001\uff0c\u5219\u6d4b\u8bd5\u7ebf\u7a0bID\u662f\u5426\u4e3a\u5f53\u524d\u7ebf\u7a0bID\uff0c\u5982\u679c\u662f\uff0c\u5219\u6267\u884c\u6b65\u9aa4(5)\uff0c\u5426\u5219\u6267\u884c\u6b65\u9aa4(3)\uff1b
\n\u5982\u679c\u7ebf\u7a0bID\u4e0d\u4e3a\u5f53\u524d\u7ebf\u7a0bID\uff0c\u5219\u901a\u8fc7CAS\u64cd\u4f5c\u7ade\u4e89\u9501\uff0c\u7ade\u4e89\u6210\u529f\uff0c\u5219\u5c06Mark Word\u7684\u7ebf\u7a0bID\u66ff\u6362\u4e3a\u5f53\u524d\u7ebf\u7a0bID\uff0c\u5426\u5219\u6267\u884c\u7ebf\u7a0b(4)\uff1b
\n\u901a\u8fc7CAS\u7ade\u4e89\u9501\u5931\u8d25\uff0c\u8bc1\u660e\u5f53\u524d\u5b58\u5728\u591a\u7ebf\u7a0b\u7ade\u4e89\u60c5\u51b5\uff0c\u5f53\u5230\u8fbe\u5168\u5c40\u5b89\u5168\u70b9\uff0c\u83b7\u5f97\u504f\u5411\u9501\u7684\u7ebf\u7a0b\u88ab\u6302\u8d77\uff0c\u504f\u5411\u9501\u5347\u7ea7\u4e3a\u8f7b\u91cf\u7ea7\u9501\uff0c\u7136\u540e\u88ab\u963b\u585e\u5728\u5b89\u5168\u70b9\u7684\u7ebf\u7a0b\u7ee7\u7eed\u5f80\u4e0b\u6267\u884c\u540c\u6b65\u4ee3\u7801\u5757\uff1b
\n\u6267\u884c\u540c\u6b65\u4ee3\u7801\u5757
\n\u91ca\u653e\u9501
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\n\u64a4\u9500\u504f\u5411\u82cf\uff0c\u6062\u590d\u5230\u65e0\u9501\u72b6\u6001(01)\u6216\u8005\u8f7b\u91cf\u7ea7\u9501\u7684\u72b6\u6001\uff1b
\n\u90a3\u4e48\u8f7b\u91cf\u7ea7\u9501\u548c\u504f\u5411\u9501\u7684\u4f7f\u7528\u573a\u666f\u4e3a
\n\u8f7b\u91cf\u7ea7\u9501\u662f\u4e3a\u4e86\u5728\u7ebf\u7a0b\u4ea4\u66ff\u6267\u884c\u540c\u6b65\u5757\u65f6\u63d0\u9ad8\u6027\u80fd\uff0c\u800c\u504f\u5411\u9501\u5219\u662f\u5728\u53ea\u6709\u4e00\u4e2a\u7ebf\u7a0b\u6267\u884c\u540c\u6b65\u5757\u65f6\u8fdb\u4e00\u6b65\u63d0\u9ad8\u6027\u80fd\u3002<\/p>\n
\u8f7b\u91cf\u7ea7\u9501
\n\u5f15\u5165\u8f7b\u91cf\u7ea7\u9501\u7684\u4e3b\u8981\u539f\u56e0\u662f\uff0c\u5bf9\u7edd\u5927\u90e8\u5206\u7684\u9501\uff0c\u5728\u6574\u4e2a\u540c\u6b65\u5468\u671f\u5185\u90fd\u4e0d\u5b58\u5728\u7ade\u4e89\uff0c\u53ef\u80fd\u662f\u4ea4\u66ff\u83b7\u53d6\u9501\u7136\u540e\u6267\u884c\u3002(\u4e0e\u504f\u5411\u9501\u7684\u533a\u522b\u662f\uff0c\u5f15\u5165\u504f\u5411\u9501\u662f\u5047\u8bbe\u540c\u4e00\u4e2a\u9501\u90fd\u662f\u7531\u540c\u4e00\u7ebf\u7a0b\u591a\u6b21\u83b7\u5f97\uff0c\u800c\u8f7b\u91cf\u7ea7\u9501\u662f\u5047\u8bbe\u540c\u4e00\u4e2a\u9501\u662f\u7531n\u4e2a\u7ebf\u7a0b\u4ea4\u66ff\u83b7\u5f97\uff1b\u76f8\u540c\u70b9\u662f\u90fd\u662f\u5047\u8bbe\u4e0d\u5b58\u5728\u591a\u7ebf\u7a0b\u7ade\u4e89)
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\n\u89e6\u53d1\u8f7b\u91cf\u7ea7\u9501\u7684\u6761\u4ef6\u662f\u5f53\u5173\u95ed\u504f\u5411\u9501\u529f\u80fd\u6216\u8005\u591a\u4e2a\u7ebf\u7a0b\u7ade\u4e89\u504f\u5411\u9501\u5bfc\u81f4\u504f\u5411\u9501\u5347\u7ea7\u4e3a\u8f7b\u91cf\u7ea7\u9501\uff0c\u5219\u4f1a\u5c1d\u8bd5\u83b7\u53d6\u8f7b\u91cf\u7ea7\u9501\uff0c\u6b64\u65f6Mark Word\u7684\u7ed3\u6784\u4e5f\u53d8\u4e3a\u8f7b\u91cf\u7ea7\u9501\u7684\u7ed3\u6784\u3002\u5982\u679c\u5b58\u5728\u591a\u4e2a\u7ebf\u7a0b\u540c\u4e00\u65f6\u95f4\u8bbf\u95ee\u540c\u4e00\u9501\u7684\u573a\u5408\uff0c\u5c31\u4f1a\u5bfc\u81f4\u8f7b\u91cf\u7ea7\u9501\u81a8\u80c0\u4e3a\u91cd\u91cf\u7ea7\u9501\u3002<\/p>\n
\u5176\u6b65\u9aa4\u5982\u4e0b\uff1a
\n\u83b7\u53d6\u9501<\/p>\n
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\nJVM\u5229\u7528CAS\u64cd\u4f5c\u5c1d\u8bd5\u5c06\u5bf9\u8c61\u7684Mark Word\u66f4\u65b0\u4e3a\u6307\u5411Lock Record\u7684\u6307\u9488\uff0c\u5982\u679c\u6210\u529f\u8868\u793a\u7ade\u4e89\u5230\u9501\uff0c\u5219\u5c06\u9501\u6807\u5fd7\u4f4d\u53d8\u621000\uff08\u8868\u793a\u6b64\u5bf9\u8c61\u5904\u4e8e\u8f7b\u91cf\u7ea7\u9501\u72b6\u6001\uff09\uff0c\u6267\u884c\u540c\u6b65\u64cd\u4f5c\uff1b\u5982\u679c\u5931\u8d25\u5219\u6267\u884c\u6b65\u9aa4\uff083\uff09\uff1b
\n\u5224\u65ad\u5f53\u524d\u5bf9\u8c61\u7684Mark Word\u662f\u5426\u6307\u5411\u5f53\u524d\u7ebf\u7a0b\u7684\u6808\u5e27\uff0c\u5982\u679c\u662f\u5219\u8868\u793a\u5f53\u524d\u7ebf\u7a0b\u5df2\u7ecf\u6301\u6709\u5f53\u524d\u5bf9\u8c61\u7684\u9501\uff0c\u5219\u76f4\u63a5\u6267\u884c\u540c\u6b65\u4ee3\u7801\u5757\uff1b\u5426\u5219\u53ea\u80fd\u8bf4\u660e\u8be5\u9501\u5bf9\u8c61\u5df2\u7ecf\u88ab\u5176\u4ed6\u7ebf\u7a0b\u62a2\u5360\u4e86\uff0c\u8fd9\u65f6\u8f7b\u91cf\u7ea7\u9501\u9700\u8981\u81a8\u80c0\u4e3a\u91cd\u91cf\u7ea7\u9501\uff0c\u9501\u6807\u5fd7\u4f4d\u53d8\u621010\uff0c\u540e\u9762\u7b49\u5f85\u7684\u7ebf\u7a0b\u5c06\u4f1a\u8fdb\u5165\u963b\u585e\u72b6\u6001\uff1b
\n\u91ca\u653e\u9501
\n\u8f7b\u91cf\u7ea7\u9501\u7684\u91ca\u653e\u4e5f\u662f\u901a\u8fc7CAS\u64cd\u4f5c\u6765\u8fdb\u884c\u7684\uff0c\u4e3b\u8981\u6b65\u9aa4\u5982\u4e0b\uff1a<\/p>\n
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\n\u81ea\u65cb\u9501
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\n\u4f55\u8c13\u81ea\u65cb\u9501\uff1f
\n\u6240\u8c13\u81ea\u65cb\u9501\uff0c\u5c31\u662f\u8ba9\u8be5\u7ebf\u7a0b\u7b49\u5f85\u4e00\u6bb5\u65f6\u95f4\uff0c\u4e0d\u4f1a\u88ab\u7acb\u5373\u6302\u8d77\uff0c\u770b\u6301\u6709\u9501\u7684\u7ebf\u7a0b\u662f\u5426\u4f1a\u5f88\u5feb\u91ca\u653e\u9501\u3002\u600e\u4e48\u7b49\u5f85\u5462\uff1f\u6267\u884c\u4e00\u6bb5\u65e0\u610f\u4e49\u7684\u5faa\u73af\u5373\u53ef\uff08\u81ea\u65cb\uff09\u3002
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\n\u81ea\u65cb\u9501\u5728JDK 1.4.2\u4e2d\u5f15\u5165\uff0c\u9ed8\u8ba4\u5173\u95ed\uff0c\u4f46\u662f\u53ef\u4ee5\u4f7f\u7528-XX:+UseSpinning\u5f00\u5f00\u542f\uff0c\u5728JDK1.6\u4e2d\u9ed8\u8ba4\u5f00\u542f\u3002\u540c\u65f6\u81ea\u65cb\u7684\u9ed8\u8ba4\u6b21\u6570\u4e3a10\u6b21\uff0c\u53ef\u4ee5\u901a\u8fc7\u53c2\u6570-XX:PreBlockSpin\u6765\u8c03\u6574\uff1b
\n\u5982\u679c\u901a\u8fc7\u53c2\u6570-XX:preBlockSpin\u6765\u8c03\u6574\u81ea\u65cb\u9501\u7684\u81ea\u65cb\u6b21\u6570\uff0c\u4f1a\u5e26\u6765\u8bf8\u591a\u4e0d\u4fbf\u3002\u5047\u5982\u6211\u5c06\u53c2\u6570\u8c03\u6574\u4e3a10\uff0c\u4f46\u662f\u5f88\u591a\u7ebf\u7a0b\u90fd\u662f\u7b49\u4f60\u521a\u521a\u9000\u51fa\u81ea\u65cb\u7684\u65f6\u5019\u5c31\u91ca\u653e\u4e86\u9501\uff08\u5047\u5982\u4f60\u518d\u591a\u81ea\u65cb\u4e00\u4e24\u6b21\u5c31\u53ef\u4ee5\u83b7\u53d6\u9501\uff09\uff0c\u4f60\u662f\u4e0d\u662f\u5f88\u5c34\u5c2c\u3002\u4e8e\u662fJDK1.6\u5f15\u5165\u81ea\u9002\u5e94\u7684\u81ea\u65cb\u9501\uff0c\u8ba9\u865a\u62df\u673a\u4f1a\u53d8\u5f97\u8d8a\u6765\u8d8a\u806a\u660e\u3002<\/p>\n
JDK 1.6\u5f15\u5165\u4e86\u66f4\u52a0\u806a\u660e\u7684\u81ea\u65cb\u9501\uff0c\u5373\u81ea\u9002\u5e94\u81ea\u65cb\u9501\u3002\u6240\u8c13\u81ea\u9002\u5e94\u5c31\u610f\u5473\u7740\u81ea\u65cb\u7684\u6b21\u6570\u4e0d\u518d\u662f\u56fa\u5b9a\u7684\uff0c\u5b83\u662f\u7531\u524d\u4e00\u6b21\u5728\u540c\u4e00\u4e2a\u9501\u4e0a\u7684\u81ea\u65cb\u65f6\u95f4\u53ca\u9501\u7684\u62e5\u6709\u8005\u7684\u72b6\u6001\u6765\u51b3\u5b9a\u3002\u5b83\u600e\u4e48\u505a\u5462\uff1f\u7ebf\u7a0b\u5982\u679c\u81ea\u65cb\u6210\u529f\u4e86\uff0c\u90a3\u4e48\u4e0b\u6b21\u81ea\u65cb\u7684\u6b21\u6570\u4f1a\u66f4\u52a0\u591a\uff0c\u56e0\u4e3a\u865a\u62df\u673a\u8ba4\u4e3a\u65e2\u7136\u4e0a\u6b21\u6210\u529f\u4e86\uff0c\u90a3\u4e48\u6b64\u6b21\u81ea\u65cb\u4e5f\u5f88\u6709\u53ef\u80fd\u4f1a\u518d\u6b21\u6210\u529f\uff0c\u90a3\u4e48\u5b83\u5c31\u4f1a\u5141\u8bb8\u81ea\u65cb\u7b49\u5f85\u6301\u7eed\u7684\u6b21\u6570\u66f4\u591a\u3002\u53cd\u4e4b\uff0c\u5982\u679c\u5bf9\u4e8e\u67d0\u4e2a\u9501\uff0c\u5f88\u5c11\u6709\u81ea\u65cb\u80fd\u591f\u6210\u529f\u7684\uff0c\u90a3\u4e48\u5728\u4ee5\u540e\u8981\u6216\u8005\u8fd9\u4e2a\u9501\u7684\u65f6\u5019\u81ea\u65cb\u7684\u6b21\u6570\u4f1a\u51cf\u5c11\u751a\u81f3\u7701\u7565\u6389\u81ea\u65cb\u8fc7\u7a0b\uff0c\u4ee5\u514d\u6d6a\u8d39\u5904\u7406\u5668\u8d44\u6e90\u3002<\/p>\n
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\u6574\u4e2a\u6267\u884c\u6d41\u7a0b\u5982\u4e0b\uff1a<\/p>\n
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