{"id":201224,"date":"2025-05-10T09:28:24","date_gmt":"2025-05-10T01:28:24","guid":{"rendered":"https:\/\/server.hk\/cnblog\/201224\/"},"modified":"2025-05-10T09:28:24","modified_gmt":"2025-05-10T01:28:24","slug":"redis%e7%9a%84string%e7%b1%bb%e5%9e%8b%e5%8f%8abitmap%e4%bb%8b%e7%bb%8d","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/201224\/","title":{"rendered":"redis\u7684string\u7c7b\u578b\u53cabitmap\u4ecb\u7ecd"},"content":{"rendered":"<p><b><\/b> <\/p>\n<h1>redis\u7684string\u7c7b\u578b\u53cabitmap\u4ecb\u7ecd<\/h1>\n<p><span style=\"cursor: pointer\"><i><\/i>\u6536\u85cf<\/span> <\/p>\n<p>\u672c\u7bc7\u6587\u7ae0\u4e3b\u8981\u662f\u7ed3\u5408\u6211\u4e4b\u524d\u9762\u8bd5\u7684\u5404\u79cd\u7ecf\u5386\u548c\u5b9e\u6218\u5f00\u53d1\u4e2d\u9047\u5230\u7684\u95ee\u9898\u89e3\u51b3\u7ecf\u9a8c\u6574\u7406\u7684\uff0c\u5e0c\u671b\u8fd9\u7bc7\u300aredis\u7684string\u7c7b\u578b\u53cabitmap\u4ecb\u7ecd\u300b\u5bf9\u4f60\u6709\u5f88\u5927\u5e2e\u52a9\uff01\u6b22\u8fce\u6536\u85cf\uff0c\u5206\u4eab\u7ed9\u66f4\u591a\u7684\u9700\u8981\u7684\u670b\u53cb\u5b66\u4e60~<\/p>\n<h2>redis\u8fd0\u884c\u539f\u7406<\/h2>\n<p>redis\u6709\u5f88\u591a\u7684\u5ba2\u6237\u7aef\u8fde\u63a5\u8fdb\u6765\uff0c\u7ad9\u5728redis\u6240\u5728\u673a\u5668\u7684\u89d2\u5ea6\u6765\u8bf4\uff0c\u5c31\u662f\u6709\u5f88\u591asocket\u7684\u8fde\u63a5\uff0c\u5e76\u4e14\u662f\u6253\u5728\u5185\u6838<br \/>\u4e0a\u9762\u7684\uff0credis\u662f\u4e00\u4e2a\u8fdb\u7a0b\uff0c\u8fdb\u7a0b\u53ef\u4ee5\u8c03\u7528\u5185\u6838\u4e0a\u7684epoll\uff0c\u6765\u904d\u5386\u5bfb\u627e\u54ea\u4e00\u4e2a\u5ba2\u6237\u7aef\u53d1\u9001\u6570\u636e\u8fc7\u6765\u4e86\uff08\u8fd9\u91cc\u662f\u5355\u8fdb\u7a0b\u5355\u7ebf\u7a0b\u6765\u5904\u7406\u7528\u6237\u6570\u636e\u7684\uff09\u3002<\/p>\n<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20221231\/167248082363b00837cace4.png\" class=\"aligncenter\"><\/p>\n<h2>redis\u4f7f\u7528<\/h2>\n<p>redis\u9ed8\u8ba4\u670916\u4e2a\u5e93<\/p>\n<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20221231\/167248082463b0083827c33.png\" class=\"aligncenter\"><\/p>\n<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20221231\/167248082463b0083872656.png\" class=\"aligncenter\"><\/p>\n<p><strong>\u8f93\u5165\uff1a<\/strong><br \/>\u8fdb\u5165\u57fa\u672c\u5206\u7ec4<\/p>\n<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20221231\/167248082463b00838ccad3.png\" class=\"aligncenter\"><\/p>\n<p>keys * \u67e5\u8be2\u6240\u6709\u7684key<br \/>FLUSHDB \u6e05\u9664\u6240\u6709\u7684key<\/p>\n<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20221231\/167248082563b0083923db7.png\" class=\"aligncenter\"><\/p>\n<p>\u5bf9\u4e8e\u5982\u4e0anx\u7684\u547d\u4ee4\u662f\u6211\u5f53\u524d\u7684key\u5982\u679c\u6ca1\u6709\u88ab\u8bbe\u7f6e\u5219\u628aooxx\u7ed9\u8bbe\u7f6e\u6210\u529f\uff0c\u5982\u679c\u8bbe\u7f6e\u7684key\u5df2\u7ecf\u6709value\u4e86\uff0c<br \/>\u5219\u8fd4\u56denil \uff08\u591a\u7528\u4e8e\u5206\u5e03\u5f0f\u9501\u7684\u83b7\u53d6\uff0c\u53ea\u80fd\u6709\u4e00\u4e2a\u83b7\u53d6\u6210\u529f\uff09<\/p>\n<p>\u5bf9\u4e8exx\u547d\u4ee4\uff0c\u53ea\u6709\u5b58\u5728\u7684\u65f6\u5019\u624d\u80fd\u8fdb\u884c\u64cd\u4f5c\u3002<\/p>\n<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20221231\/167248082563b008397f298.png\" class=\"aligncenter\"><\/p>\n<p>mset\u547d\u4ee4\uff08\u8bbe\u7f6e\u591a\u4e2akey\u548cvalue\uff09<\/p>\n<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20221231\/167248082563b00839d9b0d.png\" class=\"aligncenter\"><\/p>\n<p>append\u547d\u4ee4\u4ee5\u53cagetrange\u547d\u4ee4<\/p>\n<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20221231\/167248082663b0083a2d019.png\" class=\"aligncenter\"><\/p>\n<p>redis\u6b63\u53cd\u5411\u7d22\u5f15<\/p>\n<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20221231\/167248082663b0083a74b60.png\" class=\"aligncenter\"><\/p>\n<p>\u524d\u9762\u662f\u4ece0\uff0c1\uff0c2\u5f00\u59cb\u7684\uff0c\u540e\u9762\u5219\u662f\u4ece-1\u5f00\u59cb\u9012\u51cf\u7684\uff0c\u6240\u4ee5\u4e5f\u53ef\u4ee5\u6309\u7167\u4e0b\u9762\u65b9\u5f0f\u5199<\/p>\n<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20221231\/167248082663b0083acf7d1.png\" class=\"aligncenter\"><\/p>\n<p><strong>SETRANGE \u5728\u7ed9\u5b9a\u8303\u56f4\u8bbe\u7f6e\u5b57\u7b26\u4e32\uff1a<\/strong><\/p>\n<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20221231\/167248082763b0083b2c514.png\" class=\"aligncenter\"><\/p>\n<p><strong>\u83b7\u53d6\u5b57\u7b26\u4e32\u957f\u5ea6\uff1a<\/strong><\/p>\n<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20221231\/167248082763b0083b7c8de.png\" class=\"aligncenter\"><\/p>\n<p>\u83b7\u53d6key\u6240\u5bf9\u5e94\u7684value\u7c7b\u578b\uff08\u4e3b\u8981\u662f\u770bset\u547d\u4ee4\u5206\u7ec4\u662f\u5728string\u4e0a\u9762\u7684\uff09<\/p>\n<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20221231\/167248082763b0083bcc8af.png\" class=\"aligncenter\"><\/p>\n<p><strong>\u518d\u6765\u770b\u4e00\u4e0bobject\u547d\u4ee4<\/strong><\/p>\n<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20221231\/167248082863b0083c337f9.png\" class=\"aligncenter\"><\/p>\n<p>\u5b83\u53ef\u4ee5\u67e5\u770bvalue\u7684\u7f16\u7801\u7c7b\u578b\uff08\u9762\u5411 redis string\u7c7b\u578b,\u9664\u4e86\u5b57\u7b26\u4e32\u64cd\u4f5c\u8fd8\u6709\u8ba1\u7b97\u7684\u64cd\u4f5c\u3010\u8ba1\u7b97\u7684\u64cd\u4f5c\u9762\u5411\u6570\u503c\u7684\u3011\uff09<\/p>\n<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20221231\/167248082863b0083c8de6c.png\" class=\"aligncenter\"><\/p>\n<p>incr\u548cdecr\u76f8\u5173\u547d\u4ee4\u3010\u53ef\u7528\u4e8e\u62a2\u8d2d\uff0c\u79d2\u6740\uff0c\u70b9\u8d5e\uff0c\u8bc4\u8bba\u6570\uff0c\u8be6\u60c5\u9875\uff08\u6bd4\u5982\u8bf4\u6dd8\u5b9d\u8be6\u60c5\u9875\uff0c\u4e00\u5b9a\u4f1a\u540e\u7aef\u53d1\u8d77\u4e00\u4e2a\u5f02\u6b65\u67e5\u8be2\u8d2d\u4e70\u6570\u7b49\uff0c\u67e5redis\uff0c\u53ef\u4ee5\u89c4\u907f\u5e76\u53d1\u4e0b\uff0c\u5bf9\u6570\u636e\u5e93\u7684\u4e8b\u52a1\u64cd\u4f5c\uff0c<br \/>\u5b8c\u5168\u7531redis\u5185\u5b58\u64cd\u4f5c\u4ee3\u66ff\uff09\u3011<\/p>\n<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20221231\/167248082863b0083ce54fd.png\" class=\"aligncenter\"><\/p>\n<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20221231\/167248082963b0083d41996.png\" class=\"aligncenter\"><\/p>\n<h3>redis\u4e8c\u8fdb\u5236\u5b89\u5168<\/h3>\n<p>redis\u8fdb\u7a0b\u4e0e\u5916\u754c\u4ea4\u4e92\u7684\u65f6\u5019\uff0c\u9762\u5411\u6d41\u6211\u4eec\u6709\u5b57\u8282\u6d41\uff0c\u4ee5\u53ca\u5b57\u7b26\u6d41\uff0c\u90a3\u4e48redis\u5ba2\u6237\u7aef<br \/>\u8bbf\u95ee\u7684\u65f6\u5019\uff0c\u4ecesocket\u91cc\u9762\u62ff\u5230\u7684\u662f\u5b57\u8282\u6d41\u7684\u6570\u636e\uff0c\u53ea\u8981\u672a\u6765\u7684\u53cc\u65b9\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u7aef\u6709\u540c\u6837\u7684<br \/>\u7f16\u89e3\u7801\u65b9\u5f0f\uff0c\u6570\u636e\u5c31\u4e0d\u4f1a\u88ab\u7834\u574f\u3002<br \/>\u5982 set k1 = 9999\uff0c\u6267\u884cstrlen \u8f93\u51fa4\uff0credis\u91cc\u9762\u5b58\u8fd9\u4e2a\u6570\u636e\u662f\u6309\u7167\u4e00\u4e2a\u5b57\u7b26\u4e00\u4e2a\u5b57\u8282\u6765\u5b58\u5165\u7684\uff0c\u76f4\u63a5<br \/>\u5411\u5b57\u7b26\u6d41\u53bb\u5199\uff0c\u6267\u884cincr\u4e4b\u540e\u662f\u5148\u628a\u5b57\u8282\u6d41\u62ff\u51fa\u6765\u8f6c\u6362\u6210\u6570\u503c\u7684\uff0c\u8f6c\u6362\u6210\u6570\u503c\u4e4b\u540e\u4f1a\u66f4\u65b0key\u7684encoding<br \/>\u7f16\u7801\uff0c\u53ea\u8981\u52a0\u6210\u529f\u5c31\u66f4\u65b0\u6210int\u4e86\uff0c\u5982\u679c\u4e0b\u6b21\u52a0\u7684\u8bdd\u5c31\u53ef\u4ee5\u76f4\u63a5\u68c0\u67e5\u8fd9\u4e2aencoding\u7c7b\u578b\u4e86\uff0c\u5982\u679c\u52a0\u7684\u6570<br \/>\u4e0d\u662fint\u7c7b\u578b\u5219\u62a5\u9519<br \/>\u53e6\u4e00\u79cd\u5982 set k2 \u4e2d\uff0c\u662f\u53603\u4e2a\u5b57\u8282\u7684\uff08\u8f6f\u4ef6\u548credis\u901a\u4fe1\u7528\u7684utf-8\uff09<br \/>\u6211\u4eec\u518d\u8bbe\u7f6e\u4e00\u4e2ak3\u53602\u4e2a\u5b57\u8282\uff08gbk\u7f16\u7801\uff09<\/p>\n<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20221231\/167248082963b0083d94b96.png\" class=\"aligncenter\"><\/p>\n<p>\u7136\u540e\u9000\u51fa\u7528redis-cli &#8211;raw\u6765\u767b\u5f55\uff0c\u4f1a\u89e6\u53d1\u4e00\u4e2a\u683c\u5f0f\u5316\uff08\u5982\u679c\u4e0d\u5e26\u4e0a\u2013raw\u662f\u53ea\u4f1a\u8bc6\u522bascii\u7801\u7684\uff0c\u8d85\u51fa\u90e8\u5206\u5219\u6309\u716716\u8fdb\u5236\u6765\u5c55\u793a\u7684\uff0c\u5982\u679c\u52a0\u4e0araw\u5219\u4f1a\u89e6\u53d1\u7f16\u7801\u96c6\u7684\u683c\u5f0f\u5316\uff09<\/p>\n<p><strong>key\u4e0a\u6709encoding\u7684\u8bdd\uff0c\u5c31\u76f8\u5f53\u4e8e\u505a\u4e86\u4e00\u4e2a\u4f18\u5316\uff0c\u6765\u5224\u65ad\u6211\u5f53\u524d\u8fd9\u4e2a\u64cd\u4f5c\u662f\u5426\u662f\u53ef\u884c\u7684<\/strong><\/p>\n<h3>getset\u547d\u4ee4<\/h3>\n<p>getset\u547d\u4ee4\u662f\u5c06\u65e7\u7684\u503c\u8fd4\u56de\u5e76\u5c06\u65b0\u7684\u503c\u7ed9\u8bbe\u7f6e\u8fdb\u53bb\uff0c\uff08\u76f8\u5bf9\u4e8eget \u548cset\u5355\u72ec\u6267\u884c\u7684\u8bdd\uff0c\u8981\u53d1\u4e24\u4e2a\u5355\u72ec<br \/>\u7684\u547d\u4ee4\u8fc7\u53bb\uff0cIO\u901a\u4fe1\u4e24\u6b21\uff0c\u800c\u8fd9\u79cd\u65b9\u5f0f\u53ea\u901a\u4fe1\u4e86\u4e00\u6b21\u3010\u8282\u7701\u8d44\u6e90\u3011\uff09<\/p>\n<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20221231\/167248082963b0083dec42f.png\" class=\"aligncenter\"><\/p>\n<p>mset \u8bbe\u7f6e\u591a\u4e2akey\u591a\u4e2avalue<br \/>msetnx \uff08\u8bbe\u7f6e\u591a\u4e2akey\u5bf9\u5e94\u7684value\u4fdd\u8bc1\u539f\u5b50\u6027\uff09\u4e0b\u9762\u7684\u56fe\u4e2dmsetnx \u5728\u8bbe\u7f6ek3\u7684\u65f6\u5019\u5931\u8d25\u4e86<\/p>\n<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20221231\/167248083063b0083e525a0.png\" class=\"aligncenter\"><\/p>\n<h2>\u4f4d\u56fe\uff08bitmap\uff09<\/h2>\n<p>setbit \u65b9\u6cd5\uff0c\u5728\u5bf9\u5e94\u7684bit\u4f4d\u4e0a\u9762\u8bbe\u7f6e\u503c<\/p>\n<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20221231\/167248083063b0083ea54c7.png\" class=\"aligncenter\"><\/p>\n<p><strong>bitpos\u547d\u4ee4\uff1a<\/strong><br \/>\u627e\u5230\u7b2c\u4e00\u4e2a\u5b57\u8282 \u4e2d\u7b2c\u4e00\u4e2a1\u51fa\u73b0\u7684\u4f4d\u7f6e<\/p>\n<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20221231\/167248083063b0083eefce5.png\" class=\"aligncenter\"><\/p>\n<p>\u627e\u5230\u7b2c\u4e8c\u4e2a\u5b57\u8282\u51fa\u73b01\u7684\u7b2c\u4e00\u4e2a\u4f4d\u7f6e<\/p>\n<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20221231\/167248083163b0083f5190b.png\" class=\"aligncenter\"><\/p>\n<p><strong>\u7edf\u8ba11\u5728\u5b57\u8282\u8303\u56f4\u51fa\u73b0\u4e86\u51e0\u6b21\uff1a<\/strong><\/p>\n<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20221231\/167248083163b0083faae7a.png\" class=\"aligncenter\"><\/p>\n<p>bitop \u547d\u4ee4\u53ef\u4ee5\u6309\u4f4d\u5bf9value\u8fdb\u884c\u4e0e\u548c\u6216\u7b49\u8fd0\u7b97<\/p>\n<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20221231\/167248083263b00840051ca.png\" class=\"aligncenter\"><\/p>\n<h2>\u573a\u666f\u9898<\/h2>\n<p><strong>1\u3001\u516c\u53f8\u6709\u7528\u6237\u7cfb\u7edf\uff0c\u7edf\u8ba1\u7528\u6237\u7684\u767b\u5f55\u5929\u6570\uff0c\u4e14\u7a97\u53e3\u968f\u673a\uff08\u67d0\u5929\u5f80\u524d\u63a8\u4e00\u5468\uff0c\u4ee5\u53ca\u5f80\u540e\u63a8\u4e00\u5468\uff0c\u7528\u6237\u767b\u5f55\u7684\u5929\u6570\u7edf\u8ba1\u4e00\u4e0b\uff09<\/strong><br \/>\u4e00\u5e74\u8bbe\u7f6e\u4e3a400\u5929\uff0c\u53ef\u4ee5\u4f7f\u752850\u4e2a\u5b57\u8282\u5b58\u7528\u6237\u5168\u5e74\u7684\u767b\u5f55\u72b6\u6001<\/p>\n<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20221231\/167248083263b00840578ec.png\" class=\"aligncenter\"><\/p>\n<p>-2 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\u51b7\u70ed\u7528\u6237\/\u5fe0\u8bda\u7528\u6237\uff09<br \/>\u6240\u4ee5\u9700\u8981\u505a\u6d3b\u8dc3\u7528\u6237\u7edf\u8ba1\uff0c<br \/>\u4ec0\u4e48\u662f\u6d3b\u8dc3\u7528\u6237\uff1a<br \/>\u6bd4\u5982\u8bf4 1\u53f7-3\u53f7 \u8fde\u7eed\u767b\u5f55 \u5bf9\u91cd\u590d\u767b\u5f55\u7684\u53bb\u91cd<br \/>redis\u5982\u4f55\u505a<br \/>\u9996\u5148\u57282022\u5e741\u67081\u65e5id\u4e3a1\u7684\u7528\u6237\u767b\u5f55\u4e86 \u7ed9bit\u4f4d\u76841\u4f4d\u4e0a\u8bbe\u7f6e1<br \/>\u57282022\u5e741\u67082\u65e5id\u4e3a1\u548cid\u4e3a7\u7684\u7528\u6237\u767b\u5f55\u4e86\u5206\u522b\u5728bit\u4f4d1\u548cbit\u4f4d7\u4e0a\u8bbe\u7f6e1<\/p>\n<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20221231\/167248083263b00840a2948.png\" class=\"aligncenter\"><\/p>\n<h2>\u603b\u7ed3<\/h2>\n<p>key\u7684type\u7c7b\u578b\uff0c\u662f\u7528\u4e8e\u5224\u65ad\u8bbf\u95ee\u7684\u65b9\u6cd5\u662f\u4e0d\u662f\u5177\u5907\u8fd9\u4e2a\u7c7b\u578b\u7684\u64cd\u4f5c\uff0c\u53ef\u4ee5\u5feb\u901f\u8fd4\u56de\u9519\u8bef\uff0c\u53ef\u4ee5\u89c4\u907f<br \/>\u5f02\u5e38\u3002<br \/>encoding\u662f\u53ef\u4ee5\u89c4\u907f\u540c\u4e00\u79cdtype\u7c7b\u578b\u4f46\u662f\u6839\u636e\u4e0d\u540c\u7684\u8868\u73b0\u5f62\u5f0f\u505a\u8ba1\u7b97\u8fd9\u4ef6\u4e8b\uff0c<br 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