{"id":10008016,"date":"2023-06-29T12:59:11","date_gmt":"2023-06-29T04:59:11","guid":{"rendered":"https:\/\/ityet.com\/?p=10008016"},"modified":"2023-06-29T12:59:11","modified_gmt":"2023-06-29T04:59:11","slug":"%e8%94%9a%e6%9d%a5%e7%9c%9f%e9%a2%98%e5%92%8c%e7%ad%94%e6%a1%88%ef%bc%8c%e4%b8%bb%e6%89%93%e4%b8%80%e4%b8%aa%e7%ae%80%e5%8d%95%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/itmax.cn\/?p=10008016","title":{"rendered":"\u851a\u6765\u771f\u9898\u548c\u7b54\u6848\uff0c\u4e3b\u6253\u4e00\u4e2a\u7b80\u5355\uff1f"},"content":{"rendered":"<p>\u95ee\u9898\u6765\u6e90\u5982\u4e0b\uff1a<\/p>\n<p>&lt;img src=&quot;https:\/\/cdn.nlark.com\/yuque\/0\/2023\/png\/92791\/1687946200989-e5852be8-69f0-49a9-9b40-f3960db36c2d.png&quot; width=&quot;50%&quot;&gt;<\/p>\n<blockquote><p>\u95ee\u9898\u94fe\u63a5\uff1a<a href=\"https:\/\/link.segmentfault.com\/?enc=P%2BLN5VJ6fQcT7F1JftbThQ%3D%3D.wFAUYgEG%2Bcz6RBxc17LbtrLCEM5fNn7k%2FImikZot%2BV6Nx6AFEaP9dNhd5aqrj1uErBT1xlAIU3PjnFP7K%2B1dxg%3D%3D\" rel=\"nofollow\">https:\/\/www.nowcoder.com\/discuss\/493178141461041152<\/a><\/p><\/blockquote>\n<h2>\u7b54\u6848\u89e3\u6790<\/h2>\n<h3>1.\u89e3\u91ca\u810f\u8bfb\/\u4e0d\u53ef\u91cd\u590d\u8bfb\/\u5e7b\u8bfb<\/h3>\n<ul>\n<li><strong>\u810f\u8bfb<\/strong>\uff1a\u6307\u4e00\u4e2a\u4e8b\u52a1\u8bfb\u53d6\u5230\u4e86\u53e6\u4e00\u4e2a\u4e8b\u52a1\u4e3a\u63d0\u4ea4\u4fdd\u5b58\u7684\u6570\u636e\uff0c\u4e4b\u540e\u6b64\u4e8b\u52a1\u8fdb\u884c\u4e86\u56de\u6eda\u64cd\u4f5c\uff0c\u4ece\u800c\u5bfc\u81f4\u7b2c\u4e00\u4e2a\u4e8b\u52a1\u8bfb\u53d6\u4e86\u4e00\u4e2a\u4e0d\u5b58\u5728\u7684\u810f\u6570\u636e\u3002<\/li>\n<li><strong>\u4e0d\u53ef\u91cd\u590d\u8bfb<\/strong>\uff1a\u5728\u540c\u4e00\u4e2a\u4e8b\u52a1\u4e2d\uff0c\u540c\u4e00\u4e2a\u67e5\u8be2\u5728\u4e0d\u540c\u7684\u65f6\u95f4\u5f97\u5230\u4e86\u4e0d\u540c\u7684\u7ed3\u679c\u3002\u4f8b\u5982\u4e8b\u52a1\u5728 T1 \u8bfb\u53d6\u5230\u4e86\u67d0\u4e00\u884c\u6570\u636e\uff0c\u5728 T2 \u65f6\u95f4\u91cd\u65b0\u8bfb\u53d6\u8fd9\u4e00\u884c\u65f6\u5019\uff0c\u8fd9\u4e00\u884c\u7684\u6570\u636e\u5df2\u7ecf\u53d1\u751f\u4fee\u6539\uff0c\u6240\u4ee5\u518d\u6b21\u8bfb\u53d6\u65f6\u5f97\u5230\u4e86\u4e00\u4e2a\u548c T1 \u67e5\u8be2\u65f6\u4e0d\u540c\u7684\u7ed3\u679c\u3002<\/li>\n<li>\n<p><strong>\u5e7b\u8bfb<\/strong>\uff1a\u540c\u4e00\u4e2a\u67e5\u8be2\u5728\u4e0d\u540c\u65f6\u95f4\u5f97\u5230\u4e86\u4e0d\u540c\u7684\u7ed3\u679c\uff0c\u8fd9\u5c31\u662f\u4e8b\u52a1\u4e2d\u7684\u5e7b\u8bfb\u95ee\u9898\u3002\u4f8b\u5982\uff0c\u4e00\u4e2a SELECT \u88ab\u6267\u884c\u4e86\u4e24\u6b21\uff0c\u4f46\u662f\u7b2c\u4e8c\u6b21\u8fd4\u56de\u4e86\u7b2c\u4e00\u6b21\u6ca1\u6709\u8fd4\u56de\u7684\u4e00\u884c\uff0c\u90a3\u4e48\u8fd9\u4e00\u884c\u5c31\u662f\u4e00\u4e2a\u201c\u5e7b\u50cf\u201d\u884c\u3002<\/p>\n<h4>\u4e0d\u53ef\u91cd\u590d\u8bfb\u548c\u5e7b\u8bfb\u7684\u533a\u522b<\/h4>\n<\/li>\n<li><strong>\u4e0d\u53ef\u91cd\u590d\u8bfb\u7684\u91cd\u70b9\u662f\u4fee\u6539<\/strong>\uff1a\u5728\u540c\u4e00\u4e8b\u52a1\u4e2d\uff0c\u540c\u6837\u7684\u6761\u4ef6\uff0c\u7b2c\u4e00\u6b21\u8bfb\u7684\u6570\u636e\u548c\u7b2c\u4e8c\u6b21\u8bfb\u7684\u6570\u636e\u4e0d\u4e00\u6837\u3002\uff08\u56e0\u4e3a\u4e2d\u95f4\u6709\u5176\u4ed6\u4e8b\u52a1\u63d0\u4ea4\u4e86\u4fee\u6539\uff09\uff1b<\/li>\n<li>\n<p><strong>\u5e7b\u8bfb\u7684\u91cd\u70b9\u5728\u4e8e\u65b0\u589e\u6216\u8005\u5220\u9664<\/strong>\uff1a\u5728\u540c\u4e00\u4e8b\u52a1\u4e2d\uff0c\u540c\u6837\u7684\u6761\u4ef6,\uff0c\u7b2c\u4e00\u6b21\u548c\u7b2c\u4e8c\u6b21\u8bfb\u51fa\u6765\u7684\u8bb0\u5f55\u6570\u4e0d\u4e00\u6837\u3002\uff08\u56e0\u4e3a\u4e2d\u95f4\u6709\u5176\u4ed6\u4e8b\u52a1\u63d0\u4ea4\u4e86\u63d2\u5165\/\u5220\u9664\uff09\u3002<\/p>\n<h3>2.\u7d22\u5f15\u5931\u6548\u7684\u573a\u666f\u6709\u54ea\u4e9b\uff1f<\/h3>\n<p>\u5e38\u89c1\u7684\u7d22\u5f15\u5931\u6548\u573a\u666f\u6709\u4ee5\u4e0b\u8fd9\u4e9b\uff1a<\/p>\n<\/li>\n<\/ul>\n<ol>\n<li>\u672a\u9075\u5faa\u6700\u5de6\u5339\u914d\u539f\u5219<\/li>\n<li>\u4f7f\u7528\u5217\u8fd0\u7b97<\/li>\n<li>\u4f7f\u7528\u51fd\u6570\u65b9\u6cd5<\/li>\n<li>\u7c7b\u578b\u8f6c\u6362<\/li>\n<li>\u4f7f\u7528 is not null<\/li>\n<li>\u9519\u8bef\u7684\u6a21\u7cca\u5339\u914d\uff0c\u4f7f\u7528\u53f3 % \u5f00\u59cb\u67e5\u8be2\u3002<\/li>\n<\/ol>\n<p>\u5177\u4f53\u5185\u5bb9\u8bf7\u53c2\u8003\uff1a<a href=\"https:\/\/link.segmentfault.com\/?enc=Wk4VsyaZXR3ca%2B9E8dx0VQ%3D%3D.oGPmY%2F0PjKmlGRunRKzVEAc4YGJsrldDKuI%2BTc6GIkVt81aWBvT5cH4oJQjvy4T%2FTXLQhDwxIvxziKPoOjTGUw%3D%3D\" rel=\"nofollow\">https:\/\/www.javacn.site\/interview\/mysql\/indexinvalid.html<\/a><\/p>\n<h3>3.Explain\u6267\u884c\u8ba1\u5212\u7528\u8fc7\u5417\uff1f<\/h3>\n<p>Explain \u662f\u7528\u6765\u5206\u6790 SQL \u7684\u6267\u884c\u60c5\u51b5\u7684\uff0cexplain \u4f7f\u7528\u5982\u4e0b\uff0c\u53ea\u9700\u8981\u5728\u67e5\u8be2\u7684 SQL \u524d\u9762\u6dfb\u52a0\u4e0a explain \u5173\u952e\u5b57\u5373\u53ef\uff0c\u5982\u4e0b\u56fe\u6240\u793a\uff1a<br \/><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000043948787\" alt=\"image.png\" title=\"image.png\" loading=\"lazy\"><br \/><strong>\u800c\u4ee5\u4e0a\u67e5\u8be2\u7ed3\u679c\u7684\u5217\u4e2d\uff0c\u6211\u4eec\u6700\u4e3b\u8981\u89c2\u5bdf key \u8fd9\u4e00\u5217\uff0ckey \u8fd9\u4e00\u5217\u8868\u793a\u5b9e\u9645\u4f7f\u7528\u7684\u7d22\u5f15\uff0c\u5982\u679c\u4e3a NULL \u5219\u8868\u793a\u672a\u4f7f\u7528\u7d22\u5f15\uff0c\u53cd\u4e4b\u5219\u4f7f\u7528\u4e86\u7d22\u5f15\u3002<\/strong><\/p>\n<p>\u4ee5\u4e0a\u6240\u6709\u7ed3\u679c\u5217\u8bf4\u660e\u5982\u4e0b\uff1a<\/p>\n<ul>\n<li>id \u2014 \u9009\u62e9\u6807\u8bc6\u7b26\uff0cid \u8d8a\u5927\u4f18\u5148\u7ea7\u8d8a\u9ad8\uff0c\u8d8a\u5148\u88ab\u6267\u884c\uff1b<\/li>\n<li>select_type \u2014 \u8868\u793a\u67e5\u8be2\u7684\u7c7b\u578b\uff1b<\/li>\n<li>table \u2014 \u8f93\u51fa\u7ed3\u679c\u96c6\u7684\u8868\uff1b<\/li>\n<li>partitions \u2014 \u5339\u914d\u7684\u5206\u533a\uff1b<\/li>\n<li>type \u2014 \u8868\u793a\u8868\u7684\u67e5\u8be2\u7c7b\u578b\uff1b<\/li>\n<li>possible_keys \u2014 \u8868\u793a\u67e5\u8be2\u65f6\uff0c\u53ef\u80fd\u4f7f\u7528\u7684\u7d22\u5f15\uff1b<\/li>\n<li><strong>key \u2014 \u8868\u793a\u5b9e\u9645\u4f7f\u7528\u7684\u7d22\u5f15\uff1b<\/strong><\/li>\n<li>key_len \u2014 \u7d22\u5f15\u5b57\u6bb5\u7684\u957f\u5ea6\uff1b<\/li>\n<li>ref\u2014  \u5217\u4e0e\u7d22\u5f15\u7684\u6bd4\u8f83\uff1b<\/li>\n<li>rows \u2014 \u5927\u6982\u4f30\u7b97\u7684\u884c\u6570\uff1b<\/li>\n<li>filtered \u2014 \u6309\u8868\u6761\u4ef6\u8fc7\u6ee4\u7684\u884c\u767e\u5206\u6bd4\uff1b<\/li>\n<li>Extra \u2014 \u6267\u884c\u60c5\u51b5\u7684\u63cf\u8ff0\u548c\u8bf4\u660e\u3002<\/li>\n<\/ul>\n<h3>4.Type\u5b57\u6bb5\u6709\u4ec0\u4e48\u4fe1\u606f\uff1f<\/h3>\n<p>Explain \u6267\u884c\u8ba1\u5212\u4e2d\u6700\u91cd\u8981\u7684\u5c31\u662f type \u5b57\u6bb5\uff0ctype \u5305\u542b\u7684\u4fe1\u606f\u5982\u4e0b\uff1a<\/p>\n<ul>\n<li>all \u2014 \u626b\u63cf\u5168\u8868\u6570\u636e\uff1b<\/li>\n<li>index \u2014 \u904d\u5386\u7d22\u5f15\uff1b<\/li>\n<li>range \u2014 \u7d22\u5f15\u8303\u56f4\u67e5\u627e\uff1b<\/li>\n<li>index_subquery \u2014 \u5728\u5b50\u67e5\u8be2\u4e2d\u4f7f\u7528 ref\uff1b<\/li>\n<li>unique_subquery \u2014 \u5728\u5b50\u67e5\u8be2\u4e2d\u4f7f\u7528 eq_ref\uff1b<\/li>\n<li>ref_or_null \u2014 \u5bf9 null \u8fdb\u884c\u7d22\u5f15\u7684\u4f18\u5316\u7684 ref\uff1b<\/li>\n<li>fulltext \u2014 \u4f7f\u7528\u5168\u6587\u7d22\u5f15\uff1b<\/li>\n<li>ref \u2014 \u4f7f\u7528\u975e\u552f\u4e00\u7d22\u5f15\u67e5\u627e\u6570\u636e\uff1b<\/li>\n<li>eq_ref \u2014 \u5728 join \u67e5\u8be2\u4e2d\u4f7f\u7528\u4e3b\u952e\u6216\u552f\u4e00\u7d22\u5f15\u5173\u8054\uff1b<\/li>\n<li>const \u2014 \u5c06\u4e00\u4e2a\u4e3b\u952e\u653e\u7f6e\u5230 where \u540e\u9762\u4f5c\u4e3a\u6761\u4ef6\u67e5\u8be2\uff0c MySQL \u4f18\u5316\u5668\u5c31\u80fd\u628a\u8fd9\u6b21\u67e5\u8be2\u4f18\u5316\u8f6c\u5316\u4e3a\u4e00\u4e2a\u5e38\u91cf\uff0c\u5982\u4f55\u8f6c\u5316\u4ee5\u53ca\u4f55\u65f6\u8f6c\u5316\uff0c\u8fd9\u4e2a\u53d6\u51b3\u4e8e\u4f18\u5316\u5668\uff0c\u8fd9\u4e2a\u6bd4 eq_ref \u6548\u7387\u9ad8\u4e00\u70b9\u3002<\/li>\n<\/ul>\n<h3>5.binlog\u548credolog\u533a\u522b\uff1f<\/h3>\n<p>binlog\uff08\u4e8c\u8fdb\u5236\u65e5\u5fd7\uff09\u548c redolog\uff08\u91cd\u505a\u65e5\u5fd7\uff09\u90fd\u662f MySQL \u4e2d\u7684\u91cd\u8981\u65e5\u5fd7\uff0c\u4f46\u4e8c\u8005\u5b58\u5728\u4ee5\u4e0b\u4e0d\u540c\u3002<\/p>\n<ol>\n<li>\n<p>binlog\uff08\u4e8c\u8fdb\u5236\u65e5\u5fd7\uff09\uff1a<\/p>\n<ul>\n<li>binlog \u662f MySQL \u7684\u670d\u52a1\u5668\u5c42\u65e5\u5fd7\uff0c\u7528\u4e8e\u8bb0\u5f55\u5bf9\u6570\u636e\u5e93\u6267\u884c\u7684\u6240\u6709\u4fee\u6539\u64cd\u4f5c\uff0c\u5305\u62ec\u63d2\u5165\u3001\u66f4\u65b0\u548c\u5220\u9664\u7b49\u3002\u5b83\u4ee5\u4e8c\u8fdb\u5236\u683c\u5f0f\u8bb0\u5f55\uff0c\u53ef\u4ee5\u88ab\u7528\u4e8e\u6570\u636e\u590d\u5236\u3001\u6062\u590d\u548c\u6545\u969c\u6062\u590d\u7b49\u64cd\u4f5c\u3002<\/li>\n<li>binlog \u8bb0\u5f55\u4e86\u903b\u8f91\u4e0a\u7684\u64cd\u4f5c\uff0c\u5373\u6267\u884c\u7684 SQL \u8bed\u53e5\u6216\u8bed\u53e5\u7684\u903b\u8f91\u8868\u793a\u3002<\/li>\n<li>binlog \u662f\u5728\u4e8b\u52a1\u63d0\u4ea4\u540e\u624d\u4f1a\u751f\u6210\uff0c\u56e0\u6b64\u5b83\u662f\u6301\u4e45\u5316\u7684\u3002<\/li>\n<li>binlog \u53ef\u4ee5\u88ab\u914d\u7f6e\u4e3a\u4e0d\u540c\u7684\u683c\u5f0f\uff0c\u5305\u62ec\u57fa\u4e8e\u8bed\u53e5\u7684\u590d\u5236\uff08statement-based replication\uff09\u3001\u57fa\u4e8e\u884c\u7684\u590d\u5236\uff08row-based replication\uff09\u548c\u6df7\u5408\u590d\u5236\uff08mixed replication\uff09\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>redolog\uff08\u91cd\u505a\u65e5\u5fd7\uff09\uff1a<\/p>\n<ul>\n<li>redolog \u662f MySQL \u7684\u5b58\u50a8\u5f15\u64ce\u5c42\u65e5\u5fd7\uff0c\u7528\u4e8e\u786e\u4fdd\u6570\u636e\u5e93\u7684\u4e8b\u52a1\u6301\u4e45\u6027\u548c\u5d29\u6e83\u6062\u590d\u80fd\u529b\u3002<\/li>\n<li>redolog \u8bb0\u5f55\u4e86\u7269\u7406\u5c42\u9762\u7684\u4fee\u6539\u64cd\u4f5c\uff0c\u5373\u5bf9\u6570\u636e\u9875\u7684\u7269\u7406\u4fee\u6539\u3002\u5b83\u4e3b\u8981\u7528\u4e8e\u4fdd\u8bc1\u4e8b\u52a1\u7684\u6301\u4e45\u6027\uff0c\u786e\u4fdd\u5728\u53d1\u751f\u5d29\u6e83\u65f6\uff0c\u5df2\u7ecf\u63d0\u4ea4\u7684\u4e8b\u52a1\u5bf9\u6570\u636e\u5e93\u7684\u4fee\u6539\u80fd\u591f\u88ab\u6062\u590d\u3002<\/li>\n<li>redolog \u662f\u5faa\u73af\u5199\u5165\u7684\uff0c\u5b83\u7684\u6570\u636e\u5199\u5165\u5230\u78c1\u76d8\u4e0a\u7684\u6587\u4ef6\u4e2d\u3002\u5728\u53d1\u751f\u5d29\u6e83\u65f6\uff0c\u901a\u8fc7 redolog \u7684\u91cd\u505a\u64cd\u4f5c\uff0c\u53ef\u4ee5\u5c06\u6570\u636e\u5e93\u6062\u590d\u5230\u5d29\u6e83\u524d\u7684\u4e00\u81f4\u72b6\u6001\u3002<\/li>\n<li>redolog \u662f\u5728\u4e8b\u52a1\u6267\u884c\u671f\u95f4\u4e0d\u65ad\u5199\u5165\u7684\uff0c\u4ee5\u786e\u4fdd\u5728\u7cfb\u7edf\u5d29\u6e83\u65f6\u53ef\u4ee5\u91cd\u505a\u6240\u6709\u5df2\u63d0\u4ea4\u7684\u4e8b\u52a1\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<p>\u5c0f\u7ed3\uff1abinlog \u7528\u4e8e\u8bb0\u5f55\u903b\u8f91\u5c42\u9762\u7684\u64cd\u4f5c\uff0c\u53ef\u4ee5\u7528\u4e8e\u6570\u636e\u590d\u5236\u548c\u6062\u590d\uff0c\u800c redolog \u7528\u4e8e\u8bb0\u5f55\u7269\u7406\u5c42\u9762\u7684\u64cd\u4f5c\uff0c\u786e\u4fdd\u4e8b\u52a1\u7684\u6301\u4e45\u6027\u548c\u5d29\u6e83\u6062\u590d\u3002\u5b83\u4eec\u5728\u529f\u80fd\u548c\u4f7f\u7528\u4e0a\u6709\u4e00\u4e9b\u4e0d\u540c\uff0c\u4f46\u90fd\u662f MySQL \u4e2d\u91cd\u8981\u7684\u65e5\u5fd7\u673a\u5236\u3002<\/p>\n<h3>6.Redis\u57fa\u672c\u6570\u636e\u7c7b\u578b<\/h3>\n<p>Redis \u5e38\u7528\u7684\u6570\u636e\u7c7b\u578b\u6709 5 \u79cd\uff1aString \u5b57\u7b26\u4e32\u7c7b\u578b\u3001List \u5217\u8868\u7c7b\u578b\u3001Hash \u54c8\u5e0c\u8868\u7c7b\u578b\u3001Set \u96c6\u5408\u7c7b\u578b\u3001Sorted Set \u6709\u5e8f\u96c6\u5408\u7c7b\u578b\uff0c\u5982\u4e0b\u56fe\u6240\u793a\uff1a  \u8fd9 5 \u79cd\u5e38\u7528\u7c7b\u578b\u7684\u7528\u9014\u5982\u4e0b\uff1a<\/p>\n<ol>\n<li>String\uff1a\u5b57\u7b26\u4e32\u7c7b\u578b\uff0c\u5e38\u89c1\u4f7f\u7528\u573a\u666f\u662f\uff1a\u5b58\u50a8 Session \u4fe1\u606f\u3001\u5b58\u50a8\u7f13\u5b58\u4fe1\u606f\uff08\u5982\u8be6\u60c5\u9875\u7684\u7f13\u5b58\uff09\u3001\u5b58\u50a8\u6574\u6570\u4fe1\u606f\uff0c\u53ef\u4f7f\u7528 incr \u5b9e\u73b0\u6574\u6570+1\uff0c\u548c\u4f7f\u7528 decr \u5b9e\u73b0\u6574\u6570 -1\uff1b<\/li>\n<li>List\uff1a\u5217\u8868\u7c7b\u578b\uff0c\u5e38\u89c1\u4f7f\u7528\u573a\u666f\u662f\uff1a\u5b9e\u73b0\u7b80\u5355\u7684\u6d88\u606f\u961f\u5217\u3001\u5b58\u50a8\u67d0\u9879\u5217\u8868\u6570\u636e\uff1b<\/li>\n<li>Hash\uff1a\u54c8\u5e0c\u8868\u7c7b\u578b\uff0c\u5e38\u89c1\u4f7f\u7528\u573a\u666f\u662f\uff1a\u5b58\u50a8 Session \u4fe1\u606f\u3001\u5b58\u50a8\u5546\u54c1\u7684\u8d2d\u7269\u8f66\uff0c\u8d2d\u7269\u8f66\u975e\u5e38\u9002\u5408\u7528\u54c8\u5e0c\u5b57\u5178\u8868\u793a\uff0c\u4f7f\u7528\u4eba\u5458\u552f\u4e00\u7f16\u53f7\u4f5c\u4e3a\u5b57\u5178\u7684 key\uff0cvalue \u503c\u53ef\u4ee5\u5b58\u50a8\u5546\u54c1\u7684 id \u548c\u6570\u91cf\u7b49\u4fe1\u606f\u3001\u5b58\u50a8\u8be6\u60c5\u9875\u4fe1\u606f\uff1b<\/li>\n<li>Set\uff1a\u96c6\u5408\u7c7b\u578b\uff0c\u662f\u4e00\u4e2a\u65e0\u5e8f\u5e76\u552f\u4e00\u7684\u952e\u503c\u96c6\u5408\uff0c\u5b83\u7684\u5e38\u89c1\u4f7f\u7528\u573a\u666f\u662f\uff1a\u5173\u6ce8\u529f\u80fd\uff0c\u6bd4\u5982\u5173\u6ce8\u6211\u7684\u4eba\u548c\u6211\u5173\u6ce8\u7684\u4eba\uff0c\u4f7f\u7528\u96c6\u5408\u5b58\u50a8\uff0c\u53ef\u4ee5\u4fdd\u8bc1\u4eba\u5458\u4e0d\u4f1a\u91cd\u590d\uff1b<\/li>\n<li>Sorted Set\uff1a\u6709\u5e8f\u96c6\u5408\u7c7b\u578b\uff0c\u76f8\u6bd4\u4e8e Set \u96c6\u5408\u7c7b\u578b\u591a\u4e86\u4e00\u4e2a\u6392\u5e8f\u5c5e\u6027 score\uff08\u5206\u503c\uff09\uff0c\u5b83\u7684\u5e38\u89c1\u4f7f\u7528\u573a\u666f\u662f\uff1a\u53ef\u4ee5\u7528\u6765\u5b58\u50a8\u6392\u540d\u4fe1\u606f\u3001\u5173\u6ce8\u5217\u8868\u529f\u80fd\uff0c\u8fd9\u6837\u5c31\u53ef\u4ee5\u6839\u636e\u5173\u6ce8\u5b9e\u73b0\u6392\u5e8f\u5c55\u793a\u4e86\u3002<\/li>\n<\/ol>\n<p>\u66f4\u591a\u5185\u5bb9\u8bf7\u53c2\u8003\uff1a<a href=\"https:\/\/link.segmentfault.com\/?enc=ObtD%2Bqhk%2B%2B3fX%2Bh23jrs%2Bg%3D%3D.%2B6KV%2BXliVcxlTV8NzeFO7reSAS%2BDjh7fwqb7ubg9x5Ov38Y78Lpu1EvZXkzsKH%2BO%2BvNCnBDiqL%2BCrOyttwlkCw%3D%3D\" rel=\"nofollow\">https:\/\/www.javacn.site\/interview\/redis\/types.html<\/a><\/p>\n<h3>7.\u6709\u5e8f\u96c6\u5408\u5e95\u5c42\u5b9e\u73b0\u6570\u636e\u7ed3\u6784\uff1f<\/h3>\n<p><strong>\u6709\u5e8f\u96c6\u5408\u662f\u7531 ziplist (\u538b\u7f29\u5217\u8868) \u6216 skiplist (\u8df3\u8dc3\u8868) \u7ec4\u6210\u7684\u3002<\/strong><\/p>\n<ol>\n<li>\u538b\u7f29\u5217\u8868 ziplist \u672c\u8d28\u4e0a\u5c31\u662f\u4e00\u4e2a\u5b57\u8282\u6570\u7ec4\uff0c\u662f Redis \u4e3a\u4e86\u8282\u7ea6\u5185\u5b58\u800c\u8bbe\u8ba1\u7684\u4e00\u79cd\u7ebf\u6027\u6570\u636e\u7ed3\u6784\uff0c\u53ef\u4ee5\u5305\u542b\u591a\u4e2a\u5143\u7d20\uff0c\u6bcf\u4e2a\u5143\u7d20\u53ef\u4ee5\u662f\u4e00\u4e2a\u5b57\u8282\u6570\u7ec4\u6216\u4e00\u4e2a\u6574\u6570\u3002<\/li>\n<li>\u8df3\u8dc3\u8868 skiplist \u662f\u4e00\u79cd\u6709\u5e8f\u6570\u636e\u7ed3\u6784\uff0c\u5b83\u901a\u8fc7\u5728\u6bcf\u4e2a\u8282\u70b9\u4e2d\u7ef4\u6301\u591a\u4e2a\u6307\u5411\u5176\u4ed6\u8282\u70b9\u7684\u6307\u9488\uff0c\u4ece\u800c\u8fbe\u5230\u5feb\u901f\u8bbf\u95ee\u8282\u70b9\u7684\u76ee\u7684\u3002\u8df3\u8dc3\u8868\u652f\u6301\u5e73\u5747 O(logN)\u3001\u6700\u574f O(N) \u590d\u6742\u5ea6\u7684\u8282\u70b9\u67e5\u627e\uff0c\u8fd8\u53ef\u4ee5\u901a\u8fc7\u987a\u5e8f\u6027\u64cd\u4f5c\u6765\u6279\u91cf\u5904\u7406\u8282\u70b9\u3002<\/li>\n<\/ol>\n<p>\u5f53\u6570\u636e\u6bd4\u8f83\u5c11\u65f6\uff0c\u6709<strong>\u5e8f\u96c6\u5408\u662f\u538b\u7f29\u5217\u8868\u00a0ziplist\u00a0\u5b58\u50a8\u7684\uff08\u53cd\u4e4b\u5219\u4e3a\u8df3\u8dc3\u8868 skiplist \u5b58\u50a8\uff09<\/strong>\uff0c\u4f7f\u7528\u538b\u7f29\u5217\u8868\u5b58\u50a8\u5fc5\u6ee1\u8db3\u4ee5\u4e0b\u4e24\u4e2a\u6761\u4ef6\uff1a<\/p>\n<ol>\n<li>\u6709\u5e8f\u96c6\u5408\u4fdd\u5b58\u7684\u5143\u7d20\u4e2a\u6570\u8981\u5c0f\u4e8e 128 \u4e2a\uff1b<\/li>\n<li>\u6709\u5e8f\u96c6\u5408\u4fdd\u5b58\u7684\u6240\u6709\u5143\u7d20\u6210\u5458\u7684\u957f\u5ea6\u90fd\u5fc5\u987b\u5c0f\u4e8e 64 \u5b57\u8282\u3002<\/li>\n<\/ol>\n<p>\u5982\u679c\u4e0d\u80fd\u6ee1\u8db3\u4ee5\u4e0a\u4e24\u4e2a\u6761\u4ef6\u4e2d\u7684\u4efb\u610f\u4e00\u4e2a\uff0c\u6709\u5e8f\u96c6\u5408\u5c06\u4f1a\u4f7f\u7528\u8df3\u8dc3\u8868 skiplist \u7ed3\u6784\u8fdb\u884c\u5b58\u50a8\u3002<\/p>\n<h3>8.\u8df3\u8868\u63d2\u5165\u6570\u636e\u7684\u8fc7\u7a0b\uff1f<\/h3>\n<p>\u5728\u5f00\u59cb\u8bb2\u8df3\u8dc3\u8868\u7684\u6dfb\u52a0\u6d41\u7a0b\u4e4b\u524d\uff0c\u5fc5\u987b\u5148\u641e\u61c2\u4e00\u4e2a\u6982\u5ff5\uff1a\u8282\u70b9\u7684\u968f\u673a\u5c42\u6570\u3002<br \/><strong>\u6240\u8c13\u7684\u968f\u673a\u5c42\u6570\u6307\u7684\u662f\u6bcf\u6b21\u6dfb\u52a0\u8282\u70b9\u4e4b\u524d\uff0c\u4f1a\u5148\u751f\u6210\u5f53\u524d\u8282\u70b9\u7684\u968f\u673a\u5c42\u6570\uff0c\u6839\u636e\u751f\u6210\u7684\u968f\u673a\u5c42\u6570\u6765\u51b3\u5b9a\u5c06\u5f53\u524d\u8282\u70b9\u5b58\u5728\u51e0\u5c42\u94fe\u8868\u4e2d\u3002<\/strong><\/p>\n<h5>\u4e3a\u4ec0\u4e48\u8981\u8fd9\u6837\u8bbe\u8ba1\u5462\uff1f<\/h5>\n<p>\u8fd9\u6837\u8bbe\u8ba1\u7684\u76ee\u7684\u662f\u4e3a\u4e86\u4fdd\u8bc1 Redis \u7684\u6267\u884c\u6548\u7387\u3002<\/p>\n<p>\u4e3a\u4ec0\u4e48\u8981\u751f\u6210\u968f\u673a\u5c42\u6570\uff0c\u800c\u4e0d\u662f\u5236\u5b9a\u4e00\u4e2a\u56fa\u5b9a\u7684\u89c4\u5219\uff0c\u6bd4\u5982\u4e0a\u5c42\u8282\u70b9\u662f\u4e0b\u5c42\u8de8\u8d8a\u4e24\u4e2a\u8282\u70b9\u7684\u94fe\u8868\u7ec4\u6210\uff0c\u5982\u4e0b\u56fe\u6240\u793a\uff1a<br \/><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000043941919\" alt=\"image.png\" title=\"image.png\" loading=\"lazy\"><\/p>\n<p>\u5982\u679c\u5236\u5b9a\u4e86\u89c4\u5219\uff0c\u90a3\u4e48\u5c31\u9700\u8981\u5728\u6dfb\u52a0\u6216\u5220\u9664\u65f6\uff0c\u4e3a\u4e86\u6ee1\u8db3\u5176\u89c4\u5219\uff0c\u505a\u989d\u5916\u7684\u5904\u7406\uff0c\u6bd4\u5982\u6dfb\u52a0\u4e86\u4e00\u4e2a\u65b0\u8282\u70b9\uff0c\u5982\u4e0b\u56fe\u6240\u793a\uff1a<br \/><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000043941920\" alt=\"image.png\" title=\"image.png\" loading=\"lazy\"><br \/>\u8fd9\u6837\u5c31\u4e0d\u6ee1\u8db3\u5236\u5b9a\u7684\u4e0a\u5c42\u8282\u70b9\u8de8\u8d8a\u4e0b\u5c42\u4e24\u4e2a\u8282\u70b9\u7684\u89c4\u5219\u4e86\uff0c\u5c31\u9700\u8981\u989d\u5916\u7684\u8c03\u6574\u4e0a\u5c42\u4e2d\u7684\u6240\u6709\u8282\u70b9\uff0c\u8fd9\u6837\u7a0b\u5e8f\u7684\u6548\u7387\u5c31\u964d\u4f4e\u4e86\uff0c\u6240\u4ee5\u4f7f\u7528\u968f\u673a\u5c42\u6570\uff0c\u4e0d\u5f3a\u5236\u5236\u5b9a\u89c4\u5219\uff0c\u8fd9\u6837\u5c31\u4e0d\u9700\u8981\u8fdb\u884c\u989d\u5916\u7684\u64cd\u4f5c\uff0c\u4ece\u800c\u4e5f\u5c31\u4e0d\u4f1a\u5360\u7528\u670d\u52a1\u6267\u884c\u7684\u65f6\u95f4\u4e86\u3002<\/p>\n<h4>\u6dfb\u52a0\u6d41\u7a0b<\/h4>\n<p>Redis \u4e2d\u8df3\u8dc3\u8868\u7684\u6dfb\u52a0\u6d41\u7a0b\u5982\u4e0b\u56fe\u6240\u793a\uff1a<br \/><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000043941921\" alt=\"43df041841fad96d60c6385ac23b23d.jpg\" title=\"43df041841fad96d60c6385ac23b23d.jpg\" loading=\"lazy\"><\/p>\n<ol>\n<li>\u7b2c\u4e00\u4e2a\u5143\u7d20\u6dfb\u52a0\u5230\u6700\u5e95\u5c42\u7684\u6709\u5e8f\u94fe\u8868\u4e2d\uff08\u6700\u5e95\u5c42\u5b58\u50a8\u4e86\u6240\u6709\u5143\u7d20\u6570\u636e\uff09\u3002<\/li>\n<li>\u7b2c\u4e8c\u4e2a\u5143\u7d20\u751f\u6210\u7684\u968f\u673a\u5c42\u6570\u662f 2\uff0c\u6240\u4ee5\u518d\u589e\u52a0 1 \u5c42\uff0c\u5e76\u5c06\u6b64\u5143\u7d20\u5b58\u50a8\u5728\u7b2c 1 \u5c42\u548c\u6700\u4f4e\u5c42\u3002<\/li>\n<li>\u7b2c\u4e09\u4e2a\u5143\u7d20\u751f\u6210\u7684\u968f\u673a\u5c42\u6570\u662f 4\uff0c\u6240\u4ee5\u518d\u589e\u52a0 2 \u5c42\uff0c\u6574\u4e2a\u8df3\u8dc3\u8868\u53d8\u6210\u4e86 4 \u5c42\uff0c\u5c06\u6b64\u5143\u7d20\u4fdd\u5b58\u5230\u6240\u6709\u5c42\u4e2d\u3002<\/li>\n<li>\u7b2c\u56db\u4e2a\u5143\u7d20\u751f\u6210\u7684\u968f\u673a\u5c42\u6570\u662f 1\uff0c\u6240\u4ee5\u628a\u5b83\u6309\u987a\u5e8f\u4fdd\u5b58\u5230\u6700\u540e\u4e00\u5c42\u4e2d\u5373\u53ef\u3002<\/li>\n<\/ol>\n<p>\u5176\u4ed6\u65b0\u589e\u8282\u70b9\u4ee5\u6b64\u7c7b\u63a8\u3002<br \/>\u66f4\u591a\u5185\u5bb9\u8bf7\u53c2\u8003\uff1a<a href=\"https:\/\/link.segmentfault.com\/?enc=WyECblXdOYyrs4Uda8%2FVFA%3D%3D.UstLjHTGKpMHX96kGokaL2ypAwU3NDxlohj1Ea4Ms6UJ4Mx1tU01IXlAJ5dW%2FFDFRLcT0qelNS4gT52FMvOxPQ%3D%3D\" rel=\"nofollow\">https:\/\/www.javacn.site\/company\/redis_skiplist.html<\/a><\/p>\n<h3>9.\u7ebf\u7a0b\u6c60\u6709\u54ea\u4e9b\u53c2\u6570\uff1f<\/h3>\n<p>\u7ebf\u7a0b\u6c60\uff08ThreadPoolExecutor\uff09\u6709 7 \u4e2a\u53c2\u6570\uff0c\u8fd9 7 \u4e2a\u53c2\u6570\u7684\u542b\u4e49\u5982\u4e0b\uff1a<\/p>\n<ul>\n<li>\u7b2c 1 \u4e2a\u53c2\u6570\uff1acorePoolSize \u8868\u793a\u7ebf\u7a0b\u6c60\u7684\u5e38\u9a7b\u6838\u5fc3\u7ebf\u7a0b\u6570\u3002\u5982\u679c\u8bbe\u7f6e\u4e3a 0\uff0c\u5219\u8868\u793a\u5728\u6ca1\u6709\u4efb\u4f55\u4efb\u52a1\u65f6\uff0c\u9500\u6bc1\u7ebf\u7a0b\u6c60\uff1b\u5982\u679c\u5927\u4e8e 0\uff0c\u5373\u4f7f\u6ca1\u6709\u4efb\u52a1\u65f6\u4e5f\u4f1a\u4fdd\u8bc1\u7ebf\u7a0b\u6c60\u7684\u7ebf\u7a0b\u6570\u91cf\u7b49\u4e8e\u6b64\u503c\u3002\u4f46\u9700\u8981\u6ce8\u610f\uff0c\u6b64\u503c\u5982\u679c\u8bbe\u7f6e\u7684\u6bd4\u8f83\u5c0f\uff0c\u5219\u4f1a\u9891\u7e41\u7684\u521b\u5efa\u548c\u9500\u6bc1\u7ebf\u7a0b\uff08\u521b\u5efa\u548c\u9500\u6bc1\u7684\u539f\u56e0\u4f1a\u5728\u672c\u8bfe\u65f6\u7684\u4e0b\u534a\u90e8\u5206\u8bb2\u5230\uff09\uff1b\u5982\u679c\u8bbe\u7f6e\u7684\u6bd4\u8f83\u5927\uff0c\u5219\u4f1a\u6d6a\u8d39\u7cfb\u7edf\u8d44\u6e90\uff0c\u6240\u4ee5\u5f00\u53d1\u8005\u9700\u8981\u6839\u636e\u81ea\u5df1\u7684\u5b9e\u9645\u4e1a\u52a1\u6765\u8c03\u6574\u6b64\u503c\uff1b<\/li>\n<li>\u7b2c 2 \u4e2a\u53c2\u6570\uff1amaximumPoolSize \u8868\u793a\u7ebf\u7a0b\u6c60\u5728\u4efb\u52a1\u6700\u591a\u65f6\uff0c\u6700\u5927\u53ef\u4ee5\u521b\u5efa\u7684\u7ebf\u7a0b\u6570\u3002\u5b98\u65b9\u89c4\u5b9a\u6b64\u503c\u5fc5\u987b\u5927\u4e8e 0\uff0c\u4e5f\u5fc5\u987b\u5927\u4e8e\u7b49\u4e8e corePoolSize\uff0c\u6b64\u503c\u53ea\u6709\u5728\u4efb\u52a1\u6bd4\u8f83\u591a\uff0c\u4e14\u4e0d\u80fd\u5b58\u653e\u5728\u4efb\u52a1\u961f\u5217\u65f6\uff0c\u624d\u4f1a\u7528\u5230\uff1b<\/li>\n<li>\u7b2c 3 \u4e2a\u53c2\u6570\uff1akeepAliveTime \u8868\u793a\u7ebf\u7a0b\u7684\u5b58\u6d3b\u65f6\u95f4\uff0c\u5f53\u7ebf\u7a0b\u6c60\u7a7a\u95f2\u65f6\u5e76\u4e14\u8d85\u8fc7\u4e86\u6b64\u65f6\u95f4\uff0c\u591a\u4f59\u7684\u7ebf\u7a0b\u5c31\u4f1a\u9500\u6bc1\uff0c\u76f4\u5230\u7ebf\u7a0b\u6c60\u4e2d\u7684\u7ebf\u7a0b\u6570\u91cf\u9500\u6bc1\u7684\u7b49\u4e8e corePoolSize \u4e3a\u6b62\uff0c\u5982\u679c maximumPoolSize \u7b49\u4e8e corePoolSize\uff0c\u90a3\u4e48\u7ebf\u7a0b\u6c60\u5728\u7a7a\u95f2\u7684\u65f6\u5019\u4e5f\u4e0d\u4f1a\u9500\u6bc1\u4efb\u4f55\u7ebf\u7a0b\uff1b<\/li>\n<li>\u7b2c 4 \u4e2a\u53c2\u6570\uff1aunit \u8868\u793a\u5b58\u6d3b\u65f6\u95f4\u7684\u5355\u4f4d\uff0c\u5b83\u662f\u914d\u5408 keepAliveTime \u53c2\u6570\u5171\u540c\u4f7f\u7528\u7684\uff1b<\/li>\n<li>\u7b2c 5 \u4e2a\u53c2\u6570\uff1aworkQueue \u8868\u793a\u7ebf\u7a0b\u6c60\u6267\u884c\u7684\u4efb\u52a1\u961f\u5217\uff0c\u5f53\u7ebf\u7a0b\u6c60\u7684\u6240\u6709\u7ebf\u7a0b\u90fd\u5728\u5904\u7406\u4efb\u52a1\u65f6\uff0c\u5982\u679c\u6765\u4e86\u65b0\u4efb\u52a1\u5c31\u4f1a\u7f13\u5b58\u5230\u6b64\u4efb\u52a1\u961f\u5217\u4e2d\u6392\u961f\u7b49\u5f85\u6267\u884c\uff1b<\/li>\n<li>\u7b2c 6 \u4e2a\u53c2\u6570\uff1athreadFactory \u8868\u793a\u7ebf\u7a0b\u7684\u521b\u5efa\u5de5\u5382\uff0c\u6b64\u53c2\u6570\u4e00\u822c\u7528\u7684\u6bd4\u8f83\u5c11\uff0c\u6211\u4eec\u901a\u5e38\u5728\u521b\u5efa\u7ebf\u7a0b\u6c60\u65f6\u4e0d\u6307\u5b9a\u6b64\u53c2\u6570\uff0c\u5b83\u4f1a\u4f7f\u7528\u9ed8\u8ba4\u7684\u7ebf\u7a0b\u521b\u5efa\u5de5\u5382\u7684\u65b9\u6cd5\u6765\u521b\u5efa\u7ebf\u7a0b\uff1b<\/li>\n<li>\u7b2c 7 \u4e2a\u53c2\u6570\uff1aRejectedExecutionHandler \u8868\u793a\u6307\u5b9a\u7ebf\u7a0b\u6c60\u7684\u62d2\u7edd\u7b56\u7565\uff0c\u5f53\u7ebf\u7a0b\u6c60\u7684\u4efb\u52a1\u5df2\u7ecf\u5728\u7f13\u5b58\u961f\u5217 workQueue \u4e2d\u5b58\u50a8\u6ee1\u4e86\u4e4b\u540e\uff0c\u5e76\u4e14\u4e0d\u80fd\u521b\u5efa\u65b0\u7684\u7ebf\u7a0b\u6765\u6267\u884c\u6b64\u4efb\u52a1\u65f6\uff0c\u5c31\u4f1a\u7528\u5230\u6b64\u62d2\u7edd\u7b56\u7565\uff0c\u5b83\u5c5e\u4e8e\u4e00\u79cd\u9650\u6d41\u4fdd\u62a4\u7684\u673a\u5236\u3002<\/li>\n<\/ul>\n<p>\u66f4\u591a\u5185\u5bb9\u8bf7\u53c2\u8003\uff1a<a href=\"https:\/\/link.segmentfault.com\/?enc=qTlfEx90XWdH9exCsyzCpg%3D%3D.yv4RAvnzugEN0busG36JPkLdbthXCetwNQ%2BDqTAFy2irPd5Pa3iF%2BQgNWitkShKu\" rel=\"nofollow\">https:\/\/juejin.cn\/post\/7072921565079273480<\/a><\/p>\n<h3>10.\u62d2\u7edd\u7b56\u7565\u6709\u54ea\u4e9b\uff1f<\/h3>\n<p>\u7ebf\u7a0b\u6c60\u7684\u62d2\u7edd\u7b56\u7565\u9ed8\u8ba4\u6709\u4ee5\u4e0b 4 \u79cd\uff1a<\/p>\n<ol>\n<li>AbortPolicy\uff1a\u4e2d\u6b62\u7b56\u7565\uff0c\u7ebf\u7a0b\u6c60\u4f1a\u629b\u51fa\u5f02\u5e38\u5e76\u4e2d\u6b62\u6267\u884c\u6b64\u4efb\u52a1\uff1b<\/li>\n<li>CallerRunsPolicy\uff1a\u628a\u4efb\u52a1\u4ea4\u7ed9\u6dfb\u52a0\u6b64\u4efb\u52a1\u7684\uff08main\uff09\u7ebf\u7a0b\u6765\u6267\u884c\uff1b<\/li>\n<li>DiscardPolicy\uff1a\u5ffd\u7565\u6b64\u4efb\u52a1\uff0c\u5ffd\u7565\u6700\u65b0\u7684\u4e00\u4e2a\u4efb\u52a1\uff1b<\/li>\n<li>DiscardOldestPolicy\uff1a\u5ffd\u7565\u6700\u65e9\u7684\u4efb\u52a1\uff0c\u6700\u5148\u52a0\u5165\u961f\u5217\u7684\u4efb\u52a1\u3002<\/li>\n<\/ol>\n<p>\u9ed8\u8ba4\u7684\u62d2\u7edd\u7b56\u7565\u4e3a AbortPolicy \u4e2d\u6b62\u7b56\u7565\u3002\u5f53\u7136\u9664\u4e86 JDK \u5185\u7f6e\u7684 4 \u79cd\u62d2\u7edd\u7b56\u7565\u4e4b\u5916\uff0c\u7528\u6237\u8fd8\u53ef\u4ee5\u81ea\u5b9a\u4e49\u62d2\u7edd\u7b56\u7565\uff0c\u901a\u8fc7\u5b9e\u73b0 new RejectedExecutionHandler\uff0c\u5e76\u91cd\u5199 rejectedExecution \u65b9\u6cd5\u6765\u5b9e\u73b0\u81ea\u5b9a\u4e49\u62d2\u7edd\u7b56\u7565\uff0c\u5b9e\u73b0\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n<pre><code class=\"java\">public static void main(String[] args) {\n    \/\/ \u4efb\u52a1\u7684\u5177\u4f53\u65b9\u6cd5\n    Runnable runnable = new Runnable() {\n        @Override\n        public void run() {\n            System.out.println(&quot;\u5f53\u524d\u4efb\u52a1\u88ab\u6267\u884c,\u6267\u884c\u65f6\u95f4:&quot; + new Date() +\n                               &quot; \u6267\u884c\u7ebf\u7a0b:&quot; + Thread.currentThread().getName());\n            try {\n                \/\/ \u7b49\u5f85 1s\n                TimeUnit.SECONDS.sleep(1);\n            } catch (InterruptedException e) {\n                e.printStackTrace();\n            }\n        }\n    };\n    \/\/ \u521b\u5efa\u7ebf\u7a0b,\u7ebf\u7a0b\u7684\u4efb\u52a1\u961f\u5217\u7684\u957f\u5ea6\u4e3a 1\n    ThreadPoolExecutor threadPool = new ThreadPoolExecutor(1, 1,\n                                                           100, TimeUnit.SECONDS, new LinkedBlockingQueue&lt;&gt;(1),\n                                                           new RejectedExecutionHandler() {\n                                                               @Override\n                                                               public void rejectedExecution(Runnable r, ThreadPoolExecutor executor) {\n                                                                   \/\/ \u6267\u884c\u81ea\u5b9a\u4e49\u62d2\u7edd\u7b56\u7565\u7684\u76f8\u5173\u64cd\u4f5c\n                                                                   System.out.println(&quot;\u6211\u662f\u81ea\u5b9a\u4e49\u62d2\u7edd\u7b56\u7565~&quot;);\n                                                               }\n                                                           });\n    \/\/ \u6dfb\u52a0\u5e76\u6267\u884c 4 \u4e2a\u4efb\u52a1\n    threadPool.execute(runnable);\n    threadPool.execute(runnable);\n    threadPool.execute(runnable);\n    threadPool.execute(runnable);\n}<\/code><\/pre>\n<h3>11.\u4f60\u5e38\u7528\u7684\u62d2\u7edd\u7b56\u7565\u662f\u54ea\u79cd\uff1f\u4e3a\u4ec0\u4e48\uff1f<\/h3>\n<p>\u6700\u5e38\u7528\u7684\u62d2\u7edd\u7b56\u7565\u662f\u81ea\u5b9a\u4e49\u62d2\u7edd\u7b56\u7565\uff0c\u56e0\u4e3a\u91cc\u9762\u53ef\u4ee5\u5b9e\u73b0\u81ea\u5df1\u7684\u4e1a\u52a1\u4ee3\u7801\uff0c\u6bd4\u5982\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u81ea\u5b9a\u4e49\u62d2\u7edd\u7b56\u7565\uff0c\u53d1\u9001\u8b66\u544a\u4fe1\u606f\u7ed9\u76f8\u5173\u4eba\u5458\uff0c\u8fd9\u6837\u5c31\u80fd\u53ca\u65f6\u53d1\u73b0\u7a0b\u5e8f\u6267\u884c\u7684\u95ee\u9898\uff0c\u540c\u65f6\u518d\u5c06\u62d2\u7edd\u7684\u4efb\u52a1\u8bb0\u5f55\u4e0b\u6765\uff0c\u8ba9\u5f00\u53d1\u4eba\u5458\u624b\u52a8\u5904\u7406\uff0c\u8fd9\u6837\u5c31\u53ef\u4ee5\u53ca\u65f6\u53d1\u73b0\u95ee\u9898\uff0c\u5e76\u89e3\u51b3\u95ee\u9898\u4e86\u3002<\/p>\n<h3>12.\u4e09\u4e2a\u7ebf\u7a0b\u4ea4\u66ff\u6253\u5370ABC<\/h3>\n<p>\u4e09\u4e2a\u7ebf\u7a0b\u4ea4\u66ff\u6253\u5370 ABC \u7684\u5b9e\u73b0\u65b9\u6cd5\u6709\u5f88\u591a\uff0c\u6211\u4e2a\u4eba\u6bd4\u8f83\u503e\u5411\u4e8e\u4f7f\u7528 JUC \u4e0b\u7684 CyclicBarrier\uff08\u5faa\u73af\u6805\u680f\uff0c\u4e5f\u53eb\u5faa\u73af\u5c4f\u969c\uff09\u6765\u5b9e\u73b0\uff0c\u56e0\u4e3a\u5faa\u73af\u6805\u680f\u5929\u751f\u5c31\u662f\u7528\u6765\u5b9e\u73b0\u4e00\u8f6e\u4e00\u8f6e\u591a\u7ebf\u7a0b\u4efb\u52a1\u7684\uff0c\u5b83\u7684\u5b9e\u73b0\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n<pre><code class=\"java\">import java.util.concurrent.BrokenBarrierException;\nimport java.util.concurrent.CyclicBarrier;\n\n\/**\n * 3 \u4e2a\u7ebf\u7a0b\u4ea4\u66ff\u6253\u5370 ABC\n *\/\npublic class ThreadLoopPrint {\n    \/\/ \u5171\u4eab\u8ba1\u6570\u5668\n    private static int sharedCounter = 0;\n    public static void main(String[] args) {\n        \/\/ \u6253\u5370\u7684\u5185\u5bb9\n        String printString = &quot;ABC&quot;;\n        \/\/ \u5b9a\u4e49\u5faa\u73af\u6805\u680f\n        CyclicBarrier cyclicBarrier = new CyclicBarrier(3, () -&gt; {\n        });\n        \/\/ \u6267\u884c\u4efb\u52a1\n        Runnable runnable = new Runnable() {\n            @Override\n            public void run() {\n                for (int i = 0; i &lt; printString.length(); i++) {\n                    synchronized (this) {\n                        sharedCounter = sharedCounter &gt; 2 ? 0 : sharedCounter; \/\/ \u5faa\u73af\u6253\u5370\n                        System.out.println(printString.toCharArray()[sharedCounter++]);\n                    }\n                    try {\n                        \/\/ \u7b49\u5f85 3 \u4e2a\u7ebf\u7a0b\u90fd\u6253\u5370\u4e00\u904d\u4e4b\u540e\uff0c\u7ee7\u7eed\u8d70\u4e0b\u4e00\u8f6e\u7684\u6253\u5370\n                        cyclicBarrier.await();\n                    } catch (InterruptedException e) {\n                        e.printStackTrace();\n                    } catch (BrokenBarrierException e) {\n                        e.printStackTrace();\n                    }\n                }\n            }\n        };\n        \/\/ \u5f00\u542f\u591a\u4e2a\u7ebf\u7a0b\n        new Thread(runnable).start();\n        new Thread(runnable).start();\n        new Thread(runnable).start();\n    }\n}<\/code><\/pre>\n<p>\u4ee5\u4e0a\u7a0b\u5e8f\u6267\u884c\u7684\u7ed3\u679c\u5982\u4e0b\u56fe\u6240\u793a\uff1a<br \/><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000043930809\" alt=\"image.png\" title=\"image.png\" loading=\"lazy\"><br \/>\u66f4\u591a\u5185\u5bb9\u8bf7\u53c2\u8003\uff1a<a href=\"https:\/\/link.segmentfault.com\/?enc=6EGsyv3UFNQCK6JCWpVtSA%3D%3D.hKzw9%2BPBzbtRvuBs0PcfKQZO4aDsGp4zYCMgxcePqz%2BfKKi6NN%2BwemOKHYKFU6uznyEUIybAN0ASDER6AqeyuQ%3D%3D\" rel=\"nofollow\">https:\/\/www.javacn.site\/interview\/code\/weilai_thread.html<\/a><\/p>\n<h3>13.\u529b\u6263\u62ec\u53f7\u751f\u6210<\/h3>\n<p>\u53c2\u8003\u5b98\u65b9\u89e3\u9898\u601d\u8def\u548c\u5b9e\u73b0\u4ee3\u7801\uff1a<a href=\"https:\/\/link.segmentfault.com\/?enc=JCOIlwsfnL78Et6DBf0uvw%3D%3D.DCmOmRCKUmcUBsPaUyYJ6snnjSF%2BcGtX%2Bi850D6e1vfjeymGEMU%2F%2BKP9iw%2B593HBLNRf7%2F6O7kEQVNfbackFPQdTco0pDoSp7mNdifgziaKaqZ%2FPfICpgfWjKSCQfGBEBRNXewsRyKrOnthirTQs1w%3D%3D\" rel=\"nofollow\">https:\/\/leetcode.cn\/problems\/generate-parentheses\/solution\/gua-hao-sheng-cheng-by-leetcode-solution\/<\/a><\/p>\n<h5>\u53c2\u8003&#038;\u9e23\u8c22<\/h5>\n<p>\u6211\u6ca1\u6709\u4e09\u9897\u5fc3\u810f<\/p>\n<blockquote><p>\u672c\u6587\u5df2\u6536\u5f55\u5230\u6211\u7684\u9762\u8bd5\u5c0f\u7ad9 www.javacn.site\uff0c\u5176\u4e2d\u5305\u542b\u7684\u5185\u5bb9\u6709\uff1aRedis\u3001JVM\u3001\u5e76\u53d1\u3001\u5e76\u53d1\u3001MySQL\u3001Spring\u3001Spring MVC\u3001Spring Boot\u3001Spring Cloud\u3001MyBatis\u3001\u8bbe\u8ba1\u6a21\u5f0f\u3001\u6d88\u606f\u961f\u5217\u7b49\u6a21\u5757\u3002<\/p><\/blockquote>\n<p><a href=\"https:\/\/segmentfault.com\/a\/1190000043948785\">https:\/\/segmentfault.com\/a\/1190000043948785<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u95ee\u9898\u6765\u6e90\u5982\u4e0b\uff1a &lt;img src=&quot;https:\/\/cdn.nlark.com\/yuque\/0 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[4],"tags":[],"class_list":["post-10008016","post","type-post","status-publish","format-standard","hentry","category-share"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10008016","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=10008016"}],"version-history":[{"count":0,"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10008016\/revisions"}],"wp:attachment":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=10008016"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=10008016"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=10008016"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}