{"id":10008041,"date":"2023-07-05T16:01:56","date_gmt":"2023-07-05T08:01:56","guid":{"rendered":"https:\/\/ityet.com\/?p=10008041"},"modified":"2023-07-05T16:01:56","modified_gmt":"2023-07-05T08:01:56","slug":"%e7%be%8e%e5%9b%a2%e9%9d%a2%e8%af%95%e7%9c%9f%e9%a2%98%e5%92%8c%e7%ad%94%e6%a1%88","status":"publish","type":"post","link":"https:\/\/itmax.cn\/?p=10008041","title":{"rendered":"\u7f8e\u56e2\u9762\u8bd5\u771f\u9898\u548c\u7b54\u6848"},"content":{"rendered":"<p>\u95ee\u9898\u6765\u6e90\u4e8e\u67d0\u5ba2\uff0c\u5982\u4e0b\u56fe\u6240\u793a\uff1a<\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000043972703\" alt=\"image.png\" title=\"image.png\" loading=\"lazy\"><\/p>\n<blockquote><p>\u95ee\u9898\u94fe\u63a5\uff1a<a href=\"https:\/\/link.segmentfault.com\/?enc=Vh0Z5qB%2F3rZOeXIk5MO0uQ%3D%3D.HlWqPJ3RwuydKgSSfnacd4uyZGww0%2B1Jz4PdgmgLip1hdpxf9xhpEUNa3L%2FrRNjMNKQajmI91d6Jp8J1R%2FQRLGN0l6iLy2Z%2Bv6pKNRMsz9c%3D\" rel=\"nofollow\">https:\/\/www.nowcoder.com\/feed\/main\/detail\/b12f8ece42f6485d8e462ab872c4f8d8<\/a><\/p><\/blockquote>\n<h2>\u7b54\u6848\u89e3\u6790<\/h2>\n<h3>1.\u7ebf\u7a0b\u6c60\u6709\u51e0\u79cd\u5b9e\u73b0\u65b9\u5f0f\uff1f<\/h3>\n<p>\u7ebf\u7a0b\u6c60\u7684\u521b\u5efa\u65b9\u6cd5\u603b\u5171\u6709 7 \u79cd\uff0c\u4f46\u603b\u4f53\u6765\u8bf4\u53ef\u5206\u4e3a 2 \u7c7b\uff1a<\/p>\n<ol>\n<li>\u901a\u8fc7 ThreadPoolExecutor \u521b\u5efa\u7684\u7ebf\u7a0b\u6c60\uff1b<\/li>\n<li>\u901a\u8fc7 Executors \u521b\u5efa\u7684\u7ebf\u7a0b\u6c60\u3002<\/li>\n<\/ol>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000043972704\" alt=\"image.png\" title=\"image.png\" loading=\"lazy\"><\/p>\n<p>\u7ebf\u7a0b\u6c60\u7684\u521b\u5efa\u65b9\u5f0f\u603b\u5171\u5305\u542b\u4ee5\u4e0b 7 \u79cd\uff08\u5176\u4e2d 6 \u79cd\u662f\u901a\u8fc7 Executors \u521b\u5efa\u7684\uff0c1 \u79cd\u662f\u901a\u8fc7 ThreadPoolExecutor \u521b\u5efa\u7684\uff09\uff1a<\/p>\n<ol>\n<li>Executors.newFixedThreadPool\uff1a\u521b\u5efa\u4e00\u4e2a\u56fa\u5b9a\u5927\u5c0f\u7684\u7ebf\u7a0b\u6c60\uff0c\u53ef\u63a7\u5236\u5e76\u53d1\u7684\u7ebf\u7a0b\u6570\uff0c\u8d85\u51fa\u7684\u7ebf\u7a0b\u4f1a\u5728\u961f\u5217\u4e2d\u7b49\u5f85\uff1b<\/li>\n<li>Executors.newCachedThreadPool\uff1a\u521b\u5efa\u4e00\u4e2a\u53ef\u7f13\u5b58\u7684\u7ebf\u7a0b\u6c60\uff0c\u82e5\u7ebf\u7a0b\u6570\u8d85\u8fc7\u5904\u7406\u6240\u9700\uff0c\u7f13\u5b58\u4e00\u6bb5\u65f6\u95f4\u540e\u4f1a\u56de\u6536\uff0c\u82e5\u7ebf\u7a0b\u6570\u4e0d\u591f\uff0c\u5219\u65b0\u5efa\u7ebf\u7a0b\uff1b<\/li>\n<li>Executors.newSingleThreadExecutor\uff1a\u521b\u5efa\u5355\u4e2a\u7ebf\u7a0b\u6570\u7684\u7ebf\u7a0b\u6c60\uff0c\u5b83\u53ef\u4ee5\u4fdd\u8bc1\u5148\u8fdb\u5148\u51fa\u7684\u6267\u884c\u987a\u5e8f\uff1b<\/li>\n<li>Executors.newScheduledThreadPool\uff1a\u521b\u5efa\u4e00\u4e2a\u53ef\u4ee5\u6267\u884c\u5ef6\u8fdf\u4efb\u52a1\u7684\u7ebf\u7a0b\u6c60\uff1b<\/li>\n<li>Executors.newSingleThreadScheduledExecutor\uff1a\u521b\u5efa\u4e00\u4e2a\u5355\u7ebf\u7a0b\u7684\u53ef\u4ee5\u6267\u884c\u5ef6\u8fdf\u4efb\u52a1\u7684\u7ebf\u7a0b\u6c60\uff1b<\/li>\n<li>Executors.newWorkStealingPool\uff1a\u521b\u5efa\u4e00\u4e2a\u62a2\u5360\u5f0f\u6267\u884c\u7684\u7ebf\u7a0b\u6c60\uff08\u4efb\u52a1\u6267\u884c\u987a\u5e8f\u4e0d\u786e\u5b9a\uff09\u3010JDK 1.8 \u6dfb\u52a0\u3011\u3002<\/li>\n<li>\n<p>ThreadPoolExecutor\uff1a\u6700\u539f\u59cb\u7684\u521b\u5efa\u7ebf\u7a0b\u6c60\u7684\u65b9\u5f0f\uff0c\u5b83\u5305\u542b\u4e86 7 \u4e2a\u53c2\u6570\u53ef\u4f9b\u8bbe\u7f6e\uff0c\u4f1a\u66f4\u52a0\u53ef\u63a7\u3002<\/p>\n<h3>2.\u7ebf\u7a0b\u6c60\u7684\u53c2\u6570\u542b\u4e49\uff1f<\/h3>\n<p>\u95ee\u5230\u7ebf\u7a0b\u6c60\u53c2\u6570\u7684\u542b\u4e49\uff0c\u4e00\u5b9a\u662f\u95ee ThreadPoolExecutor \u53c2\u6570\u7684\u542b\u4e49\uff0c\u8fd9\u4e03\u4e2a\u53c2\u6570\u7684\u542b\u4e49\u5206\u522b\u662f\uff1a<\/p>\n<\/li>\n<li>\n<p>\u4e2a\u53c2\u6570\u4ee3\u8868\u7684\u542b\u4e49\u5982\u4e0b\uff1a<\/p>\n<h5>\u53c2\u6570 1\uff1acorePoolSize<\/h5>\n<p>\u6838\u5fc3\u7ebf\u7a0b\u6570\uff0c\u7ebf\u7a0b\u6c60\u4e2d\u59cb\u7ec8\u5b58\u6d3b\u7684\u7ebf\u7a0b\u6570\u3002<\/p>\n<h5>\u53c2\u6570 2\uff1amaximumPoolSize<\/h5>\n<p>\u6700\u5927\u7ebf\u7a0b\u6570\uff0c\u7ebf\u7a0b\u6c60\u4e2d\u5141\u8bb8\u7684\u6700\u5927\u7ebf\u7a0b\u6570\uff0c\u5f53\u7ebf\u7a0b\u6c60\u7684\u4efb\u52a1\u961f\u5217\u6ee1\u4e86\u4e4b\u540e\u53ef\u4ee5\u521b\u5efa\u7684\u6700\u5927\u7ebf\u7a0b\u6570\u3002<\/p>\n<h5>\u53c2\u6570 3\uff1akeepAliveTime<\/h5>\n<p>\u6700\u5927\u7ebf\u7a0b\u6570\u53ef\u4ee5\u5b58\u6d3b\u7684\u65f6\u95f4\uff0c\u5f53\u7ebf\u7a0b\u4e2d\u6ca1\u6709\u4efb\u52a1\u6267\u884c\u65f6\uff0c\u6700\u5927\u7ebf\u7a0b\u5c31\u4f1a\u9500\u6bc1\u4e00\u90e8\u5206\uff0c\u6700\u7ec8\u4fdd\u6301\u6838\u5fc3\u7ebf\u7a0b\u6570\u91cf\u7684\u7ebf\u7a0b\u3002<\/p>\n<h5>\u53c2\u6570 4\uff1aunit:<\/h5>\n<p>\u5355\u4f4d\u662f\u548c\u53c2\u6570 3 \u5b58\u6d3b\u65f6\u95f4\u914d\u5408\u4f7f\u7528\u7684\uff0c\u5408\u5728\u4e00\u8d77\u7528\u4e8e\u8bbe\u5b9a\u7ebf\u7a0b\u7684\u5b58\u6d3b\u65f6\u95f4 \uff0c\u53c2\u6570 keepAliveTime \u7684\u65f6\u95f4\u5355\u4f4d\u6709\u4ee5\u4e0b 7 \u79cd\u53ef\u9009\uff1a<\/p>\n<\/li>\n<\/ol>\n<ul>\n<li>TimeUnit.DAYS\uff1a\u5929<\/li>\n<li>TimeUnit.HOURS\uff1a\u5c0f\u65f6<\/li>\n<li>TimeUnit.MINUTES\uff1a\u5206<\/li>\n<li>TimeUnit.SECONDS\uff1a\u79d2<\/li>\n<li>TimeUnit.MILLISECONDS\uff1a\u6beb\u79d2<\/li>\n<li>TimeUnit.MICROSECONDS\uff1a\u5fae\u5999<\/li>\n<li>\n<p>TimeUnit.NANOSECONDS\uff1a\u7eb3\u79d2<\/p>\n<h5>\u53c2\u6570 5\uff1aworkQueue<\/h5>\n<p>\u4e00\u4e2a\u963b\u585e\u961f\u5217\uff0c\u7528\u6765\u5b58\u50a8\u7ebf\u7a0b\u6c60\u7b49\u5f85\u6267\u884c\u7684\u4efb\u52a1\uff0c\u5747\u4e3a\u7ebf\u7a0b\u5b89\u5168\uff0c\u5b83\u5305\u542b\u4ee5\u4e0b 7 \u79cd\u7c7b\u578b\uff1a<\/p>\n<\/li>\n<li>ArrayBlockingQueue\uff1a\u4e00\u4e2a\u7531\u6570\u7ec4\u7ed3\u6784\u7ec4\u6210\u7684\u6709\u754c\u963b\u585e\u961f\u5217\uff1b<\/li>\n<li>LinkedBlockingQueue\uff1a\u4e00\u4e2a\u7531\u94fe\u8868\u7ed3\u6784\u7ec4\u6210\u7684\u6709\u754c\u963b\u585e\u961f\u5217\uff1b<\/li>\n<li>SynchronousQueue\uff1a\u4e00\u4e2a\u4e0d\u5b58\u50a8\u5143\u7d20\u7684\u963b\u585e\u961f\u5217\uff0c\u5373\u76f4\u63a5\u63d0\u4ea4\u7ed9\u7ebf\u7a0b\u4e0d\u4fdd\u6301\u5b83\u4eec\uff1b<\/li>\n<li>PriorityBlockingQueue\uff1a\u4e00\u4e2a\u652f\u6301\u4f18\u5148\u7ea7\u6392\u5e8f\u7684\u65e0\u754c\u963b\u585e\u961f\u5217\uff1b<\/li>\n<li>DelayQueue\uff1a\u4e00\u4e2a\u4f7f\u7528\u4f18\u5148\u7ea7\u961f\u5217\u5b9e\u73b0\u7684\u65e0\u754c\u963b\u585e\u961f\u5217\uff0c\u53ea\u6709\u5728\u5ef6\u8fdf\u671f\u6ee1\u65f6\u624d\u80fd\u4ece\u4e2d\u63d0\u53d6\u5143\u7d20\uff1b<\/li>\n<li>LinkedTransferQueue\uff1a\u4e00\u4e2a\u7531\u94fe\u8868\u7ed3\u6784\u7ec4\u6210\u7684\u65e0\u754c\u963b\u585e\u961f\u5217\u3002\u4e0eSynchronousQueue\u7c7b\u4f3c\uff0c\u8fd8\u542b\u6709\u975e\u963b\u585e\u65b9\u6cd5\uff1b<\/li>\n<li>LinkedBlockingDeque\uff1a\u4e00\u4e2a\u7531\u94fe\u8868\u7ed3\u6784\u7ec4\u6210\u7684\u53cc\u5411\u963b\u585e\u961f\u5217\u3002<\/li>\n<\/ul>\n<p>\u8f83\u5e38\u7528\u7684\u662f LinkedBlockingQueue \u548c Synchronous\uff0c\u7ebf\u7a0b\u6c60\u7684\u6392\u961f\u7b56\u7565\u4e0e BlockingQueue \u6709\u5173\u3002<\/p>\n<h5>\u53c2\u6570 6\uff1athreadFactory<\/h5>\n<p>\u7ebf\u7a0b\u5de5\u5382\uff0c\u4e3b\u8981\u7528\u6765\u521b\u5efa\u7ebf\u7a0b\uff0c\u9ed8\u8ba4\u4e3a\u6b63\u5e38\u4f18\u5148\u7ea7\u3001\u975e\u5b88\u62a4\u7ebf\u7a0b\u3002<\/p>\n<h5>\u53c2\u6570 7\uff1ahandler<\/h5>\n<p>\u62d2\u7edd\u7b56\u7565\uff0c\u62d2\u7edd\u5904\u7406\u4efb\u52a1\u65f6\u7684\u7b56\u7565\uff0c\u7cfb\u7edf\u63d0\u4f9b\u4e86 4 \u79cd\u53ef\u9009\uff1a<\/p>\n<ul>\n<li>AbortPolicy\uff1a\u62d2\u7edd\u5e76\u629b\u51fa\u5f02\u5e38\u3002<\/li>\n<li>CallerRunsPolicy\uff1a\u4f7f\u7528\u5f53\u524d\u8c03\u7528\u7684\u7ebf\u7a0b\u6765\u6267\u884c\u6b64\u4efb\u52a1\u3002<\/li>\n<li>DiscardOldestPolicy\uff1a\u629b\u5f03\u961f\u5217\u5934\u90e8\uff08\u6700\u65e7\uff09\u7684\u4e00\u4e2a\u4efb\u52a1\uff0c\u5e76\u6267\u884c\u5f53\u524d\u4efb\u52a1\u3002<\/li>\n<li>DiscardPolicy\uff1a\u5ffd\u7565\u5e76\u629b\u5f03\u5f53\u524d\u4efb\u52a1\u3002<\/li>\n<\/ul>\n<p>\u9ed8\u8ba4\u7b56\u7565\u4e3a AbortPolicy\u3002<\/p>\n<h3>3.\u9501\u5347\u7ea7\u7684\u8fc7\u7a0b\uff1f<\/h3>\n<p>\u9501\u5347\u7ea7\u7684\u8fc7\u7a0b\u6307\u7684\u662f synchronized \u9501\u5347\u7ea7\u7684\u8fc7\u7a0b\uff0csynchronized \u9501\u5347\u7ea7\u673a\u5236\u4e5f\u53eb\u505a\u9501\u81a8\u80c0\u673a\u5236\uff0c\u6b64\u673a\u5236\u8bde\u751f\u4e8e JDK 6 \u4e2d\u3002<\/p>\n<p>\u5728 Java 6 \u53ca\u4e4b\u524d\u7684\u7248\u672c\u4e2d\uff0csynchronized \u7684\u5b9e\u73b0\u4e3b\u8981\u4f9d\u8d56\u4e8e\u64cd\u4f5c\u7cfb\u7edf\u7684 mutex \u9501\uff08\u91cd\u91cf\u7ea7\u9501\uff09\uff0c\u800c\u5728 Java 6 \u53ca\u4e4b\u540e\u7684\u7248\u672c\u4e2d\uff0cJava \u5bf9 synchronized \u8fdb\u884c\u4e86\u5347\u7ea7\uff0c\u5f15\u5165\u4e86\u9501\u5347\u7ea7\u7684\u673a\u5236\uff0c\u53ef\u4ee5\u66f4\u52a0\u9ad8\u6548\u5730\u5229\u7528 CPU \u7684\u591a\u7ea7\u7f13\u5b58\uff0c\u63d0\u5347\u4e86\u591a\u7ebf\u7a0b\u5e76\u53d1\u6027\u80fd\u3002<\/p>\n<p>synchronized \u9501\u5347\u7ea7\u7684\u8fc7\u7a0b\u53ef\u4ee5\u5206\u4e3a\u4ee5\u4e0b\u56db\u4e2a\u9636\u6bb5\uff1a\u65e0\u9501\u72b6\u6001\u3001\u504f\u5411\u9501\u3001\u8f7b\u91cf\u7ea7\u9501\u548c\u91cd\u91cf\u7ea7\u9501\u3002\u5176\u4e2d\uff0c\u65e0\u9501\u72b6\u6001\u548c\u504f\u5411\u9501\u72b6\u6001\u90fd\u5c5e\u4e8e\u4e50\u89c2\u9501\uff0c\u4e0d\u9700\u8981\u8fdb\u884c\u9501\u5347\u7ea7\uff0c\u9501\u7ade\u4e89\u8f83\u5c11\uff0c\u80fd\u591f\u63d0\u9ad8\u7a0b\u5e8f\u7684\u6027\u80fd\u3002\u53ea\u6709\u5728\u9501\u7ade\u4e89\u6fc0\u70c8\u7684\u60c5\u51b5\u4e0b\uff0c\u624d\u4f1a\u8fdb\u884c\u9501\u5347\u7ea7\uff0c\u5c06\u9501\u5347\u7ea7\u4e3a\u8f7b\u91cf\u7ea7\u9501\u72b6\u6001\u3002<br \/><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000043972705\" alt=\"\" title=\"\" loading=\"lazy\"><br \/>\u4e0b\u9762\u662f synchronized \u9501\u5347\u7ea7\u7684\u5177\u4f53\u6d41\u7a0b\uff1a<\/p>\n<p><strong>1.\u65e0\u9501\u72b6\u6001<\/strong><br \/>\u5f53\u4e00\u4e2a\u7ebf\u7a0b\u8bbf\u95ee\u4e00\u4e2a\u540c\u6b65\u5757\u65f6\uff0c\u5982\u679c\u8be5\u540c\u6b65\u5757\u6ca1\u6709\u88ab\u5176\u4ed6\u7ebf\u7a0b\u5360\u7528\uff0c\u90a3\u4e48\u8be5\u7ebf\u7a0b\u5c31\u53ef\u4ee5\u76f4\u63a5\u8fdb\u5165\u540c\u6b65\u5757\uff0c\u5e76\u4e14\u5c06\u540c\u6b65\u5757\u6807\u8bb0\u4e3a\u504f\u5411\u9501\u72b6\u6001\u3002\u8fd9\u4e2a\u8fc7\u7a0b\u4e0d\u9700\u8981\u8fdb\u884c\u4efb\u4f55\u52a0\u9501\u64cd\u4f5c\uff0c\u5c5e\u4e8e\u4e50\u89c2\u9501\u72b6\u6001\u3002<\/p>\n<p><strong>2.\u504f\u5411\u9501\u72b6\u6001<\/strong><br \/>\u5728\u504f\u5411\u9501\u72b6\u6001\u4e0b\uff0c\u540c\u6b65\u5757\u5df2\u7ecf\u88ab\u4e00\u4e2a\u7ebf\u7a0b\u5360\u7528\uff0c\u5176\u4ed6\u7ebf\u7a0b\u8bbf\u95ee\u8be5\u540c\u6b65\u5757\u65f6\uff0c\u53ea\u9700\u8981\u5224\u65ad\u8be5\u540c\u6b65\u5757\u662f\u5426\u88ab\u5f53\u524d\u7ebf\u7a0b\u5360\u7528\uff0c\u5982\u679c\u662f\uff0c\u5219\u76f4\u63a5\u8fdb\u5165\u540c\u6b65\u5757\u3002\u8fd9\u4e2a\u8fc7\u7a0b\u4e0d\u9700\u8981\u8fdb\u884c\u4efb\u4f55\u52a0\u9501\u64cd\u4f5c\uff0c\u4ecd\u7136\u5c5e\u4e8e\u4e50\u89c2\u9501\u72b6\u6001\u3002<\/p>\n<p><strong>3.\u8f7b\u91cf\u7ea7\u9501\u72b6\u6001<\/strong><br \/>\u5982\u679c\u5728\u504f\u5411\u9501\u72b6\u6001\u4e0b\uff0c\u6709\u591a\u4e2a\u7ebf\u7a0b\u7ade\u4e89\u540c\u4e00\u4e2a\u540c\u6b65\u5757\uff0c\u90a3\u4e48\u8be5\u540c\u6b65\u5757\u5c31\u4f1a\u5347\u7ea7\u4e3a\u8f7b\u91cf\u7ea7\u9501\u72b6\u6001\u3002\u6b64\u65f6\uff0c\u6bcf\u4e2a\u7ebf\u7a0b\u90fd\u4f1a\u5728\u81ea\u5df1\u7684 CPU \u7f13\u5b58\u4e2d\u4fdd\u5b58\u8be5\u540c\u6b65\u5757\u7684\u526f\u672c\uff0c\u5e76\u901a\u8fc7 CAS\uff08Compare and Swap\uff09\u64cd\u4f5c\u6765\u5bf9\u540c\u6b65\u5757\u8fdb\u884c\u52a0\u9501\u548c\u89e3\u9501\u3002\u8fd9\u4e2a\u8fc7\u7a0b\u9700\u8981\u8fdb\u884c\u52a0\u9501\u64cd\u4f5c\uff0c\u4f46\u76f8\u5bf9\u4e8e\u4f20\u7edf\u7684 mutex \u9501\uff0c\u8f7b\u91cf\u7ea7\u9501\u7684\u6548\u7387\u8981\u9ad8\u5f88\u591a\u3002<\/p>\n<p><strong>4.\u91cd\u91cf\u7ea7\u9501\u72b6\u6001<\/strong><br \/>\u8f7b\u91cf\u7ea7\u9501\u4e4b\u540e\u4f1a\u901a\u8fc7\u81ea\u65cb\u6765\u83b7\u53d6\u9501\uff0c\u81ea\u65cb\u6267\u884c\u4e00\u5b9a\u6b21\u6570\u4e4b\u540e\u8fd8\u672a\u6210\u529f\u83b7\u53d6\u5230\u9501\uff0c\u6b64\u65f6\u5c31\u4f1a\u5347\u7ea7\u4e3a\u91cd\u91cf\u7ea7\u9501\uff0c\u5e76\u4e14\u8fdb\u5165\u963b\u585e\u72b6\u6001\u3002<\/p>\n<p>synchronized \u9501\u5347\u7ea7\u7684\u8fc7\u7a0b\u53ef\u4ee5\u6709\u6548\u5730\u51cf\u5c11\u9501\u7ade\u4e89\uff0c\u63d0\u9ad8\u591a\u7ebf\u7a0b\u5e76\u53d1\u6027\u3002<\/p>\n<h3>4.i++ \u5982\u4f55\u4fdd\u8bc1\u7ebf\u7a0b\u5b89\u5168\uff1f<\/h3>\n<p>\u4fdd\u8bc1 i++ \u7ebf\u7a0b\u5b89\u5168\u7684\u624b\u6bb5\u662f\u52a0\u9501\uff0c\u53ef\u4ee5\u901a\u8fc7 synchronized \u6216 Lock \u52a0\u9501\u6765\u4fdd\u8bc1 i++ \u7684\u7ebf\u7a0b\u5b89\u5168\u3002<\/p>\n<h3>5.HashMap\u548cConcurrentHashMap\u6709\u4ec0\u4e48\u533a\u522b\uff1f<\/h3>\n<p>HashMap \u548c ConcurrentHashMap \u662f Map \u63a5\u53e3\u7684\u5177\u4f53\u5b9e\u73b0\uff0cConcurrentHashMap \u53ef\u4ee5\u770b\u4f5c\u662f HashMap \u7684\u7ebf\u7a0b\u5b89\u5168\u7248\u672c\uff0c\u5b83\u4eec\u7684\u5177\u4f53\u533a\u522b\u5982\u4e0b\uff1a<\/p>\n<ol>\n<li>\n<p><strong>\u7ebf\u7a0b\u5b89\u5168\u6027<\/strong>\uff1a<\/p>\n<ul>\n<li>HashMap\uff1aHashMap \u662f\u975e\u7ebf\u7a0b\u5b89\u5168\u7684\u3002\u5982\u679c\u591a\u4e2a\u7ebf\u7a0b\u540c\u65f6\u8bbf\u95ee\u548c\u4fee\u6539 HashMap\uff0c\u6ca1\u6709\u9002\u5f53\u7684\u540c\u6b65\u673a\u5236\u7684\u8bdd\uff0c\u53ef\u80fd\u4f1a\u5bfc\u81f4\u4e0d\u4e00\u81f4\u7684\u7ed3\u679c\u6216\u8005\u629b\u51fa ConcurrentModificationException \u5f02\u5e38\u3002<\/li>\n<li>ConcurrentHashMap\uff1aConcurrentHashMap \u662f\u7ebf\u7a0b\u5b89\u5168\u7684\u3002\u591a\u4e2a\u7ebf\u7a0b\u53ef\u4ee5\u540c\u65f6\u8bfb\u53d6\u548c\u4fee\u6539 ConcurrentHashMap\uff0c\u800c\u4e0d\u4f1a\u5bfc\u81f4\u6570\u636e\u4e0d\u4e00\u81f4\u6216\u8005\u629b\u51fa\u5f02\u5e38\u3002\u5b83\u4f7f\u7528\u4e86\u4e00\u79cd\u79f0\u4e3a&#8221;\u5206\u6bb5\u9501&#8221;\uff08Segmented Locking\uff09\u7684\u6280\u672f\uff0c\u5c06\u6574\u4e2a\u6570\u636e\u7ed3\u6784\u5206\u6210\u591a\u4e2a\u90e8\u5206\uff0c\u6bcf\u4e2a\u90e8\u5206\u90fd\u6709\u4e00\u4e2a\u72ec\u7acb\u7684\u9501\u3002\u8fd9\u6837\uff0c\u5728\u591a\u7ebf\u7a0b\u73af\u5883\u4e0b\uff0c\u4e0d\u540c\u7684\u7ebf\u7a0b\u53ef\u4ee5\u540c\u65f6\u64cd\u4f5c\u4e0d\u540c\u7684\u90e8\u5206\uff0c\u4ece\u800c\u63d0\u9ad8\u5e76\u53d1\u6027\u80fd\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<p><strong>\u6027\u80fd<\/strong>\uff1a<\/p>\n<ul>\n<li>HashMap\uff1aHashMap \u5728\u5355\u7ebf\u7a0b\u73af\u5883\u4e0b\u901a\u5e38\u5177\u6709\u66f4\u597d\u7684\u6027\u80fd\uff0c\u56e0\u4e3a\u5b83\u4e0d\u9700\u8981\u989d\u5916\u7684\u540c\u6b65\u5f00\u9500\u3002<\/li>\n<li>ConcurrentHashMap\uff1aConcurrentHashMap \u5728\u9ad8\u5e76\u53d1\u73af\u5883\u4e0b\u5177\u6709\u66f4\u597d\u7684\u6027\u80fd\uff0c\u56e0\u4e3a\u5b83\u4f7f\u7528\u4e86\u5206\u6bb5\u9501\u6280\u672f\uff0c\u591a\u4e2a\u7ebf\u7a0b\u53ef\u4ee5\u540c\u65f6\u64cd\u4f5c\u4e0d\u540c\u7684\u90e8\u5206\uff0c\u4ece\u800c\u51cf\u5c11\u4e86\u7ade\u4e89\u548c\u963b\u585e\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<p><strong>Null \u503c\u548c Null \u952e<\/strong>\uff1a<\/p>\n<ul>\n<li>HashMap\uff1aHashMap \u5141\u8bb8\u4f7f\u7528 null \u4f5c\u4e3a\u503c\u548c\u952e\u3002<\/li>\n<li>\n<p>ConcurrentHashMap\uff1aConcurrentHashMap \u4e0d\u5141\u8bb8\u4f7f\u7528 null \u4f5c\u4e3a\u952e\uff0c\u4f46\u5141\u8bb8\u4f7f\u7528 null \u4f5c\u4e3a\u503c\u3002<\/p>\n<h3>6.@Autowired\u548c@Resource\u533a\u522b\uff1f<\/h3>\n<p>@Autowired \u548c @Resource \u90fd\u662f Spring\/Spring Boot \u9879\u76ee\u4e2d\uff0c\u7528\u6765\u8fdb\u884c\u4f9d\u8d56\u6ce8\u5165\u7684\u6ce8\u89e3\u3002\u5b83\u4eec\u90fd\u63d0\u4f9b\u4e86\u5c06\u4f9d\u8d56\u5bf9\u8c61\u6ce8\u5165\u5230\u5f53\u524d\u5bf9\u8c61\u7684\u529f\u80fd\uff0c\u4f46\u4e8c\u8005\u5374\u6709\u4ee5\u4e0b\u4e0d\u540c\uff1a<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u6765\u6e90\u4e0d\u540c<\/strong>\uff1a@Autowired \u548c @Resource \u6765\u81ea\u4e0d\u540c\u7684\u201c\u7236\u7c7b\u201d\uff0c\u5176\u4e2d @Autowired \u662f Spring \u5b9a\u4e49\u7684\u6ce8\u89e3\uff0c\u800c @Resource \u662f Java \u5b9a\u4e49\u7684\u6ce8\u89e3\uff0c\u5b83\u6765\u81ea\u4e8e JSR-250\uff08Java 250 \u89c4\u8303\u63d0\u6848\uff09\uff1b<\/li>\n<li><strong>\u4f9d\u8d56\u67e5\u627e\u7684\u987a\u5e8f\u4e0d\u540c<\/strong>\uff1a@Autowired \u662f\u5148\u6839\u636e\u7c7b\u578b\uff08byType\uff09\u67e5\u627e\uff0c\u5982\u679c\u5b58\u5728\u591a\u4e2a Bean \u518d\u6839\u636e\u540d\u79f0\uff08byName\uff09\u8fdb\u884c\u67e5\u627e\uff1b\u800c @Resource \u662f\u5148\u6839\u636e\u540d\u79f0\u67e5\u627e\uff0c\u5982\u679c\uff08\u6839\u636e\u540d\u79f0\uff09\u67e5\u627e\u4e0d\u5230\uff0c\u518d\u6839\u636e\u7c7b\u578b\u8fdb\u884c\u67e5\u627e\uff1b<\/li>\n<li><strong>\u652f\u6301\u7684\u53c2\u6570\u4e0d\u540c<\/strong>\uff1a@Autowired \u53ea\u652f\u6301\u8bbe\u7f6e\u4e00\u4e2a required \u7684\u53c2\u6570\uff0c\u800c @Resource \u652f\u6301\u66f4\u591a\u7684\u53c2\u6570\u8bbe\u7f6e\uff0c@Resource \u652f\u6301 7 \u4e2a\u53c2\u6570\u7684\u8bbe\u7f6e\uff1b<\/li>\n<li><strong>\u4f9d\u8d56\u6ce8\u5165\u7684\u652f\u6301\u4e0d\u540c<\/strong>\uff1a@Autowired \u652f\u6301\u5c5e\u6027\u6ce8\u5165\u3001\u6784\u9020\u65b9\u6cd5\u6ce8\u5165\u548c Setter \u6ce8\u5165\uff0c\u800c @Resource \u53ea\u652f\u6301\u5c5e\u6027\u6ce8\u5165\u548c Setter \u6ce8\u5165\uff1b<\/li>\n<li>\n<p><strong>\u7f16\u8bd1\u5668 IDEA \u7684\u63d0\u793a\u4e0d\u540c<\/strong>\uff1a\u5f53\u4f7f\u7528 IDEA \u4e13\u4e1a\u7248\u6ce8\u5165 Mapper \u5bf9\u8c61\u65f6\uff0c\u4f7f\u7528 @Autowired \u7f16\u8bd1\u5668\u4f1a\u63d0\u793a\u62a5\u9519\u4fe1\u606f\uff08\u867d\u7136\u62a5\u9519\u4f46\u4e0d\u5370\u8c61\u7a0b\u5e8f\u7684\u6267\u884c\uff09\uff1b\u800c @Resource \u5219\u4e0d\u4f1a\u62a5\u9519\u3002<\/p>\n<h3>7.\u8bf4\u8bf4\u5e38\u7528\u7684\u8bbe\u8ba1\u6a21\u5f0f<\/h3>\n<p>\u8bf4\u5230\u8bbe\u8ba1\u6a21\u5f0f\u53ef\u4ee5\u4e3e\u4e00\u4e9b\u5e38\u89c1\u7684\u8bbe\u8ba1\u6a21\u5f0f\uff0c\u4ee5\u53ca\u8fd9\u4e9b\u8bbe\u8ba1\u6a21\u5f0f\u7684\u5177\u4f53\u5e94\u7528\uff0c\u6bd4\u5982\u4ee5\u4e0b\u8fd9\u4e9b\uff1a<\/p>\n<\/li>\n<li><strong>\u5de5\u5382\u6a21\u5f0f\uff08Factory Pattern\uff09<\/strong>\uff1a \u5de5\u5382\u6a21\u5f0f\u662f\u4e00\u79cd\u521b\u5efa\u578b\u8bbe\u8ba1\u6a21\u5f0f\uff0c\u5b83\u63d0\u4f9b\u4e86\u4e00\u79cd\u521b\u5efa\u5bf9\u8c61\u7684\u65b9\u5f0f\uff0c\u4f7f\u5f97\u5e94\u7528\u7a0b\u5e8f\u53ef\u4ee5\u66f4\u52a0\u7075\u6d3b\u548c\u53ef\u7ef4\u62a4\u3002\u6bd4\u5982\u5728 Spring \u4e2d\uff0cFactoryBean \u5c31\u662f\u4e00\u4e2a\u5de5\u5382\u6a21\u5f0f\u7684\u5b9e\u73b0\uff0c\u4f7f\u7528\u5b83\u7684\u5de5\u5382\u6a21\u5f0f\u5c31\u53ef\u4ee5\u521b\u5efa\u51fa\u6765\u5176\u4ed6\u7684 Bean \u5bf9\u8c61\uff1b<\/li>\n<li><strong>\u5355\u4f8b\u6a21\u5f0f\uff08Singleton Pattern\uff09<\/strong>\uff1a\u5355\u4f8b\u6a21\u5f0f\u662f\u4e00\u79cd\u521b\u5efa\u578b\u8bbe\u8ba1\u6a21\u5f0f\uff0c\u5b83\u4fdd\u8bc1\u4e00\u4e2a\u7c7b\u53ea\u6709\u4e00\u4e2a\u5b9e\u4f8b\uff0c\u5e76\u63d0\u4f9b\u4e86\u4e00\u4e2a\u5168\u5c40\u8bbf\u95ee\u70b9\u3002\u6bd4\u5982\u5728 Spring \u4e2d\uff0c\u6240\u4ee5\u7684 Bean \u9ed8\u8ba4\u662f\u5355\u4f8b\u7684\uff0c\u8fd9\u610f\u5473\u7740\u6bcf\u4e2a Bean \u53ea\u4f1a\u88ab\u521b\u5efa\u4e00\u6b21\uff0c\u5e76\u4e14\u53ef\u4ee5\u5728\u6574\u4e2a\u5e94\u7528\u7a0b\u5e8f\u4e2d\u5171\u4eab\uff1b<\/li>\n<li><strong>\u4ee3\u7406\u6a21\u5f0f\u6a21\u5f0f\uff08Proxy Pattern\uff09<\/strong>\uff1a \u4ee3\u7406\u6a21\u5f0f\u662f\u4e00\u79cd\u7ed3\u6784\u578b\u8bbe\u8ba1\u6a21\u5f0f\uff0c\u5b83\u5141\u8bb8\u5f00\u53d1\u4eba\u5458\u5728\u4e0d\u4fee\u6539\u539f\u6709\u4ee3\u7801\u7684\u60c5\u51b5\u4e0b\uff0c\u5411\u5e94\u7528\u7a0b\u5e8f\u4e2d\u6dfb\u52a0\u65b0\u7684\u529f\u80fd\u3002\u6bd4\u5982\u5728 Spring AOP\uff08\u9762\u5411\u5207\u9762\u7f16\u7a0b\uff09\u5c31\u662f\u4f7f\u7528\u4ee3\u7406\u6a21\u5f0f\u7684\u5b9e\u73b0\uff0c\u5b83\u5141\u8bb8\u5f00\u53d1\u4eba\u5458\u5728\u65b9\u6cd5\u8c03\u7528\u524d\u540e\u6267\u884c\u4e00\u4e9b\u81ea\u5b9a\u4e49\u7684\u64cd\u4f5c\uff0c\u6bd4\u5982\u65e5\u5fd7\u8bb0\u5f55\u3001\u6027\u80fd\u76d1\u63a7\u7b49\uff1b<\/li>\n<li><strong>\u6a21\u677f\u65b9\u6cd5\u6a21\u5f0f\uff08Template Pattern\uff09<\/strong>\uff1a\u6a21\u677f\u65b9\u6cd5\u6a21\u5f0f\u662f\u6700\u5e38\u7528\u7684\u8bbe\u8ba1\u6a21\u5f0f\u4e4b\u4e00\uff0c\u5b83\u662f\u6307\u5b9a\u4e49\u4e00\u4e2a\u64cd\u4f5c\u7b97\u6cd5\u7684\u9aa8\u67b6\uff0c\u800c\u5c06\u4e00\u4e9b\u6b65\u9aa4\u7684\u5b9e\u73b0\u5ef6\u8fdf\u5230\u5b50\u7c7b\u4e2d\u53bb\u5b9e\u73b0\uff0c\u4f7f\u5f97\u5b50\u7c7b\u53ef\u4ee5\u4e0d\u6539\u53d8\u4e00\u4e2a\u7b97\u6cd5\u7684\u7ed3\u6784\u5373\u53ef\u91cd\u5b9a\u4e49\u8be5\u7b97\u6cd5\u7684\u67d0\u4e9b\u7279\u5b9a\u6b65\u9aa4\u3002\u6b64\u6a21\u5f0f\u662f\u57fa\u4e8e\u7ee7\u627f\u7684\u601d\u60f3\u5b9e\u73b0\u4ee3\u7801\u590d\u7528\u7684\u3002\u6bd4\u5982\u5728 MyBatis \u4e2d\u7684\u5178\u578b\u4ee3\u8868 BaseExecutor\uff0c\u5728 MyBatis \u4e2d BaseExecutor \u5b9e\u73b0\u4e86\u5927\u90e8\u5206SQL \u6267\u884c\u7684\u903b\u8f91\uff1b<\/li>\n<li><strong>\u89c2\u5bdf\u8005\u6a21\u5f0f\uff08Observer Pattern\uff09<\/strong>\uff1a\u5b9a\u4e49\u4e86\u4e00\u79cd\u4e00\u5bf9\u591a\u7684\u4f9d\u8d56\u5173\u7cfb\uff0c\u5f53\u4e00\u4e2a\u5bf9\u8c61\u7684\u72b6\u6001\u53d1\u751f\u6539\u53d8\u65f6\uff0c\u6240\u6709\u4f9d\u8d56\u4e8e\u5b83\u7684\u5bf9\u8c61\u90fd\u4f1a\u5f97\u5230\u901a\u77e5\u5e76\u81ea\u52a8\u66f4\u65b0\u3002\u6bd4\u5982\u4e8b\u4ef6\u9a71\u52a8\u3001\u6d88\u606f\u4f20\u9012\u7b49\u529f\u80fd\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528\u89c2\u5bdf\u8005\u6a21\u5f0f\uff0c\u4f8b\u5982 Spring  Event \u4e8b\u4ef6\u673a\u5236\uff1b<\/li>\n<li><strong>\u9002\u914d\u5668\u6a21\u5f0f\uff08Adapter Pattern\uff09<\/strong>\uff1a\u9002\u914d\u5668\u6a21\u5f0f\u662f\u4e00\u79cd\u7ed3\u6784\u578b\u8bbe\u8ba1\u6a21\u5f0f\uff0c\u5b83\u5141\u8bb8\u5f00\u53d1\u4eba\u5458\u5c06\u4e00\u4e2a\u7c7b\u7684\u63a5\u53e3\u8f6c\u6362\u6210\u53e6\u4e00\u4e2a\u7c7b\u7684\u63a5\u53e3\uff0c\u4ee5\u6ee1\u8db3\u5ba2\u6237\u7aef\u7684\u9700\u6c42\u3002\u5728 Spring \u4e2d\uff0c\u9002\u914d\u5668\u6a21\u5f0f\u5e38\u7528\u4e8e\u5c06\u4e0d\u540c\u7c7b\u578b\u7684\u5bf9\u8c61\u8f6c\u6362\u6210\u7edf\u4e00\u7684\u63a5\u53e3\uff0c\u6bd4\u5982\u5c06 Servlet API \u8f6c\u6362\u6210 Spring MVC \u7684\u63a7\u5236\u5668\u63a5\u53e3\u3002<\/li>\n<\/ol>\n<h3>8.Redis\u4e3a\u4ec0\u4e48\u8fd9\u4e48\u5feb\uff1f<\/h3>\n<p>Redis \u8fd0\u884c\u6bd4\u8f83\u5feb\u7684\u539f\u56e0\u6709\u4ee5\u4e0b\u51e0\u4e2a\uff1a<\/p>\n<ol>\n<li><strong>\u5185\u5b58\u5b58\u50a8<\/strong>\uff1aRedis \u4e3b\u8981\u662f\u5c06\u6570\u636e\u5b58\u50a8\u5728\u5185\u5b58\u4e2d\uff0c\u800c\u4e0d\u662f\u78c1\u76d8\u4e0a\u3002\u76f8\u6bd4\u4e8e\u4f20\u7edf\u7684\u78c1\u76d8\u5b58\u50a8\u6570\u636e\u5e93\u7cfb\u7edf\uff0c\u5185\u5b58\u8bbf\u95ee\u901f\u5ea6\u66f4\u5feb\uff0c\u56e0\u6b64\u53ef\u4ee5\u5b9e\u73b0\u66f4\u4f4e\u7684\u5ef6\u8fdf\u548c\u66f4\u9ad8\u7684\u541e\u5410\u91cf\uff1b<\/li>\n<li><strong>\u5355\u7ebf\u7a0b\u6a21\u578b<\/strong>\uff1aRedis \u91c7\u7528\u5355\u7ebf\u7a0b\u6a21\u578b\u6765\u5904\u7406\u5ba2\u6237\u7aef\u7684\u8bf7\u6c42\u3002\u8fd9\u610f\u5473\u7740\u4e0d\u4f1a\u53d1\u751f\u591a\u7ebf\u7a0b\u4e4b\u95f4\u7684\u9501\u7ade\u4e89\u548c\u4e0a\u4e0b\u6587\u5207\u6362\uff0c\u907f\u514d\u4e86\u7531\u4e8e\u7ebf\u7a0b\u5207\u6362\u800c\u5bfc\u81f4\u7684\u6027\u80fd\u635f\u8017\u3002\u6b64\u5916\uff0c\u5355\u7ebf\u7a0b\u6a21\u578b\u4f7f\u5f97 Redis \u7684\u4ee3\u7801\u66f4\u52a0\u7b80\u5355\u548c\u53ef\u9884\u6d4b\uff1b<\/li>\n<li><strong>\u975e\u963b\u585eI\/O<\/strong>\uff1aRedis \u4f7f\u7528\u975e\u963b\u585e I\/O \u6a21\u578b\u6765\u5904\u7406\u7f51\u7edc\u8bf7\u6c42\u3002\u5b83\u901a\u8fc7\u4f7f\u7528\u4e8b\u4ef6\u9a71\u52a8\u7684\u65b9\u5f0f\u5904\u7406\u5e76\u53d1\u8fde\u63a5\uff0c\u5145\u5206\u5229\u7528\u4e86\u64cd\u4f5c\u7cfb\u7edf\u63d0\u4f9b\u7684\u5f02\u6b65 I\/O \u529f\u80fd\u3002\u8fd9\u4f7f\u5f97 Redis \u80fd\u591f\u9ad8\u6548\u5730\u5904\u7406\u5927\u91cf\u5e76\u53d1\u8bf7\u6c42\uff0c\u800c\u4e0d\u4f1a\u88ab\u963b\u585e\uff1b<\/li>\n<li><strong>\u9ad8\u6548\u7684\u6570\u636e\u7ed3\u6784<\/strong>\uff1aRedis \u63d0\u4f9b\u4e86\u591a\u79cd\u9ad8\u6548\u7684\u6570\u636e\u7ed3\u6784\uff0c\u5982\u5b57\u7b26\u4e32\u3001\u54c8\u5e0c\u8868\u3001\u5217\u8868\u3001\u96c6\u5408\u548c\u6709\u5e8f\u96c6\u5408\u7b49\u3002\u8fd9\u4e9b\u6570\u636e\u7ed3\u6784\u5728\u5185\u5b58\u4e2d\u76f4\u63a5\u5b58\u50a8\u548c\u64cd\u4f5c\u6570\u636e\uff0c\u4f7f\u5f97Redis\u80fd\u591f\u4ee5\u5e38\u6570\u65f6\u95f4\u590d\u6742\u5ea6 (O(1)\uff09\u6765\u6267\u884c\u8bb8\u591a\u5e38\u89c1\u7684\u64cd\u4f5c\uff0c\u5982\u63d2\u5165\u3001\u5220\u9664\u548c\u67e5\u627e\uff1b<\/li>\n<li><strong>\u5f02\u6b65\u64cd\u4f5c<\/strong>\uff1aRedis \u652f\u6301\u5f02\u6b65\u64cd\u4f5c\uff0c\u53ef\u4ee5\u5c06\u4e00\u4e9b\u8017\u65f6\u7684\u64cd\u4f5c\uff08\u5982\u6301\u4e45\u5316\uff09\u653e\u5230\u540e\u53f0\u8fdb\u884c\uff0c\u4e0d\u4f1a\u963b\u585e\u5176\u4ed6\u7684\u64cd\u4f5c\uff1b<\/li>\n<li><strong>\u8f7b\u91cf\u7ea7<\/strong>\uff1aRedis \u672c\u8eab\u662f\u4e00\u4e2a\u975e\u5e38\u8f7b\u91cf\u7ea7\u7684\u8f6f\u4ef6\uff0c\u5b83\u4f7f\u7528 C \u8bed\u8a00\u7f16\u5199\uff0c\u4ee3\u7801\u7b80\u6d01\u9ad8\u6548\u3002\u5b83\u6ca1\u6709\u590d\u6742\u7684\u4f9d\u8d56\u548c\u989d\u5916\u7684\u62bd\u8c61\u5c42\uff0c\u56e0\u6b64\u53ef\u4ee5\u66f4\u5feb\u5730\u542f\u52a8\u548c\u8fd0\u884c\u3002<\/li>\n<\/ol>\n<h3>9.\u7d22\u5f15\u7684\u79cd\u7c7b\uff1f\u5982\u4f55\u4f18\u5316\uff1f<\/h3>\n<p>MySQL \u7d22\u5f15\u6839\u636e\u4e0d\u540c\u7684\u7ef4\u5ea6\u53ef\u4ee5\u5206\u4e3a\u4e0d\u540c\u7c7b\u578b\uff0c\u6bd4\u5982\u4ee5\u4e0b\u8fd9\u4e9b\uff1a<\/p>\n<ol>\n<li>\u6839\u636e\u6570\u636e\u7ed3\u6784\u5206\u7c7b\u53ef\u5206\u4e3a\uff1a<strong>B+ tree \u7d22\u5f15\u3001Hash \u7d22\u5f15\u3001Full-Text \u7d22\u5f15<\/strong>\uff1b<\/li>\n<li>\u6839\u636e\u7269\u7406\u5b58\u50a8\u5206\u7c7b\u53ef\u5206\u4e3a\uff1a<strong>\u805a\u7c07\u7d22\u5f15\u3001\u4e8c\u7ea7\u7d22\u5f15\uff08\u8f85\u52a9\u7d22\u5f15\u3001\u975e\u805a\u7c07\u7d22\u5f15\uff09<\/strong>\uff1b<\/li>\n<li>\u6839\u636e\u5b57\u6bb5\u7279\u6027\u5206\u7c7b\u53ef\u5206\u4e3a\uff1a<strong>\u4e3b\u952e\u7d22\u5f15\u3001\u666e\u901a\u7d22\u5f15\u3001\u552f\u4e00\u7d22\u5f15\u3001\u524d\u7f00\u7d22\u5f15<\/strong>\uff1b<\/li>\n<li>\n<p>\u6839\u636e\u5b57\u6bb5\u4e2a\u6570\u5206\u7c7b\u53ef\u5206\u4e3a\uff1a<strong>\u5355\u5217\u7d22\u5f15\u3001\u8054\u5408\u7d22\u5f15\uff08\u590d\u5408\u7d22\u5f15\u3001\u7ec4\u5408\u7d22\u5f15\uff09<\/strong>\u3002<\/p>\n<h5>\u7d22\u5f15\u4f18\u5316<\/h5>\n<p>\u7d22\u5f15\u4f18\u5316\u53ef\u4ee5\u4ece\u4ee5\u4e0b\u51e0\u4e2a\u65b9\u9762\u5165\u624b\uff1a<\/p>\n<\/li>\n<li><strong>\u9009\u62e9\u9002\u5f53\u7684\u7d22\u5f15\u7c7b\u578b<\/strong>\uff1aMySQL \u63d0\u4f9b\u4e86\u4e0d\u540c\u7c7b\u578b\u7684\u7d22\u5f15\uff0c\u5305\u62ec B-tree\u3001\u54c8\u5e0c\u3001\u5168\u6587\u7b49\u3002\u6839\u636e\u67e5\u8be2\u7684\u7279\u70b9\u548c\u6570\u636e\u7684\u7279\u6027\uff0c\u9009\u62e9\u5408\u9002\u7684\u7d22\u5f15\u7c7b\u578b\u3002B-tree \u7d22\u5f15\u662f\u6700\u5e38\u7528\u7684\u7d22\u5f15\u7c7b\u578b\uff0c\u9002\u7528\u4e8e\u8303\u56f4\u67e5\u8be2\u548c\u6392\u5e8f\u64cd\u4f5c\uff1b<\/li>\n<li><strong>\u9009\u62e9\u5408\u9002\u7684\u7d22\u5f15\u5217<\/strong>\uff1a\u9009\u62e9\u5bf9\u67e5\u8be2\u9891\u7387\u9ad8\u4e14\u9009\u62e9\u6027\u597d\u7684\u5217\u4f5c\u4e3a\u7d22\u5f15\u5217\u3002\u9009\u62e9\u6027\u662f\u6307\u7d22\u5f15\u5217\u4e2d\u4e0d\u91cd\u590d\u503c\u7684\u6bd4\u4f8b\uff0c\u9009\u62e9\u6027\u8d8a\u9ad8\uff0c\u7d22\u5f15\u7684\u6548\u679c\u8d8a\u597d\u3002\u907f\u514d\u5728\u7d22\u5f15\u4e2d\u5305\u542b\u8fc7\u591a\u91cd\u590d\u503c\u6216\u8fc7\u957f\u7684\u5217\uff1b<\/li>\n<li><strong>\u5c3d\u91cf\u4f7f\u7528\u805a\u7c07\u7d22\u5f15<\/strong>\uff1a\u805a\u7c07\u7d22\u5f15\u7684\u53f6\u5b50\u8282\u70b9\u5b58\u50a8\u4e86\u5177\u4f53\u7684\u6570\u636e\uff0c\u4e0d\u7528\u5728\u50cf\u975e\u805a\u7c07\u7d22\u5f15\u4e00\u6837\u8fdb\u884c\u56de\u8868\u67e5\u8be2\uff0c\u6240\u4ee5\u5728\u67e5\u8be2\u65f6\uff0c\u5c3d\u91cf\u9009\u62e9\u805a\u7c07\u7d22\u5f15\uff1b<\/li>\n<li><strong>\u907f\u514d\u8fc7\u591a\u7684\u7d22\u5f15<\/strong>\uff1a\u7d22\u5f15\u4f1a\u5360\u7528\u5b58\u50a8\u7a7a\u95f4\uff0c\u5e76\u4e14\u5728\u6570\u636e\u66f4\u65b0\u65f6\u9700\u8981\u7ef4\u62a4\u7d22\u5f15\uff0c\u8fc7\u591a\u7684\u7d22\u5f15\u4f1a\u589e\u52a0\u7ef4\u62a4\u7684\u5f00\u9500\u3002\u53ea\u521b\u5efa\u5fc5\u8981\u7684\u7d22\u5f15\uff0c\u907f\u514d\u521b\u5efa\u8fc7\u591a\u7684\u7d22\u5f15\uff1b<\/li>\n<li><strong>\u4f7f\u7528\u7d22\u5f15\u63d0\u793a<\/strong>\uff1a\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0cMySQL \u7684\u67e5\u8be2\u4f18\u5316\u5668\u53ef\u80fd\u9009\u62e9\u4e86\u4e0d\u7406\u60f3\u7684\u67e5\u8be2\u8ba1\u5212\u3002\u53ef\u4ee5\u4f7f\u7528\u7d22\u5f15\u63d0\u793a\uff08Index Hint\uff09\u6765\u6307\u5bfc\u4f18\u5316\u5668\u9009\u62e9\u6b63\u786e\u7684\u7d22\u5f15\uff1b<\/li>\n<li><strong>\u5b9a\u671f\u76d1\u63a7\u548c\u4f18\u5316<\/strong>\uff1a\u6301\u7eed\u76d1\u63a7\u6570\u636e\u5e93\u7684\u6027\u80fd\u6307\u6807\uff0c\u5982\u67e5\u8be2\u6267\u884c\u65f6\u95f4\u3001\u7d22\u5f15\u4f7f\u7528\u60c5\u51b5\u7b49\u3002\u6839\u636e\u76d1\u63a7\u7ed3\u679c\uff0c\u5bf9\u7d22\u5f15\u8fdb\u884c\u8c03\u6574\u548c\u4f18\u5316\uff0c\u4ee5\u4fdd\u6301\u6570\u636e\u5e93\u7684\u9ad8\u6027\u80fd\u3002<\/li>\n<\/ol>\n<h3>10.\u7b97\u6cd5\u9898\uff1a\u5408\u5e76\u91cd\u53e0\u533a\u95f4<\/h3>\n<p>\u89e3\u9898\u601d\u8def\u548c\u5b9e\u73b0\u4ee3\u7801\u53c2\u8003\uff1a<a href=\"https:\/\/link.segmentfault.com\/?enc=ryvy%2FI%2FsalvLie3eIT0Dkw%3D%3D.Y7o7dxj1Q6dOvx3AA087MxOSMjL3Ewe9c%2FvuRv68OGjjKkfQQkhr6p%2Badm28QGwuHPwZ1Oq3vjjKW1sxwwZpXwSN00T0fIfATTkB9urbSD9DnOWsixBQhzQcy5PQmNeF\" rel=\"nofollow\">https:\/\/leetcode.cn\/problems\/merge-intervals\/solution\/he-bing&#8230;<\/a><\/p>\n<h3>\u5c0f\u7ed3<\/h3>\n<p>\u4ece\u4e0a\u9762\u7684\u9898\u53ef\u4ee5\u770b\u51fa\u6765\uff0c\u56e2\u5b50\u7684\u6574\u4f53\u9762\u8bd5\u9898\u662f\u4e0d\u96be\u7684\uff0c\u53ef\u4ee5\u8bf4\u793e\u62db\u7684\u9762\u8bd5\u96be\u5ea6\uff0c\u73b0\u5728\u662f\u5c0f\u4e8e\u6821\u62db\u7684\u9762\u8bd5\u96be\u5ea6\u7684\uff0c\u8fd9\u4e5f\u53ef\u80fd\u548c\u6821\u62db\u5e9e\u5927\u7684\u7ade\u4e89\u8005\u7fa4\u4f53\u6709\u5173\u3002\u6240\u4ee5\u5982\u679c\u662f\u793e\u62db\u7684\u54e5\u4eec\uff0c\u4e5f\u53ef\u4ee5\u5b9a\u671f\u9a91\u9a74\u627e\u9a6c\u8bd5\u8bd5\u6c34\uff0c\u4e00\u662f\u68c0\u9a8c\u81ea\u5df1\u80fd\u529b\u662f\u5426\u5df2\u7ecf\u843d\u540e\u4e0e\u7528\u4eba\u5e02\u573a\uff1b\u4e8c\u662f\uff0c\u4e07\u4e00\u6709\u60ca\u559c\uff0c\u62ff\u5230\u66f4\u597d\u7684 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