{"id":97406,"date":"2024-10-20T17:38:16","date_gmt":"2024-10-20T09:38:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/97406\/"},"modified":"2024-10-20T17:38:17","modified_gmt":"2024-10-20T09:38:17","slug":"redis-%e7%a9%b6%e7%ab%9f%e7%82%ba%e4%bd%95%e8%bf%94%e5%9b%9enil%ef%bc%88redis-%e8%bf%94%e5%9b%9e-nil%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/97406\/","title":{"rendered":"Redis \u7a76\u7adf\u70ba\u4f55\u8fd4\u56denil\uff08redis \u8fd4\u56de nil\uff09"},"content":{"rendered":"<h1 id=\"redis-%e7%a9%b6%e7%ab%9f%e7%82%ba%e4%bd%95%e8%bf%94%e5%9b%9enil%ef%bc%88redis-%e8%bf%94%e5%9b%9e-nil%ef%bc%89-BQHoHfknkp\">Redis \u7a76\u7adf\u70ba\u4f55\u8fd4\u56denil\uff08redis \u8fd4\u56de nil\uff09<\/h1>\n<p>\u5728\u4f7f\u7528 Redis \u9019\u500b\u9ad8\u6548\u80fd\u7684\u9375\u503c\u6578\u64da\u5eab\u6642\uff0c\u958b\u767c\u8005\u7d93\u5e38\u6703\u9047\u5230\u8fd4\u56de nil \u7684\u60c5\u6cc1\u3002\u9019\u7a2e\u60c5\u6cc1\u53ef\u80fd\u6703\u8b93\u4eba\u611f\u5230\u56f0\u60d1\uff0c\u7279\u5225\u662f\u5c0d\u65bc\u521d\u5b78\u8005\u4f86\u8aaa\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e Redis \u8fd4\u56de nil \u7684\u539f\u56e0\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u89e3\u6c7a\u65b9\u6848\u548c\u6700\u4f73\u5be6\u8e10\u3002<\/p>\n<h2 id=\"redis-%e8%bf%94%e5%9b%9e-nil-%e7%9a%84%e5%b8%b8%e8%a6%8b%e5%8e%9f%e5%9b%a0-BQHoHfknkp\">Redis \u8fd4\u56de nil \u7684\u5e38\u898b\u539f\u56e0<\/h2>\n<p>Redis \u8fd4\u56de nil \u7684\u60c5\u6cc1\u901a\u5e38\u6709\u4ee5\u4e0b\u5e7e\u7a2e\u539f\u56e0\uff1a<\/p>\n<ul>\n<li><strong>\u9375\u4e0d\u5b58\u5728\uff1a<\/strong>\u7576\u4f60\u5617\u8a66\u8a2a\u554f\u4e00\u500b\u4e0d\u5b58\u5728\u7684\u9375\u6642\uff0cRedis \u6703\u8fd4\u56de nil\u3002\u4f8b\u5982\uff1a<\/li>\n<\/ul>\n<pre><code>GET nonexistent_key\n<\/code><\/pre>\n<p>\u9019\u5c07\u8fd4\u56de nil\uff0c\u56e0\u70ba\u8a72\u9375\u4e26\u4e0d\u5b58\u5728\u65bc\u6578\u64da\u5eab\u4e2d\u3002<\/p>\n<ul>\n<li><strong>\u6578\u64da\u985e\u578b\u4e0d\u5339\u914d\uff1a<\/strong>\u5982\u679c\u4f60\u5617\u8a66\u4ee5\u4e0d\u6b63\u78ba\u7684\u6578\u64da\u985e\u578b\u8a2a\u554f\u4e00\u500b\u9375\uff0cRedis \u4e5f\u53ef\u80fd\u8fd4\u56de nil\u3002\u4f8b\u5982\uff0c\u5982\u679c\u4f60\u7528 <code>GET<\/code> \u547d\u4ee4\u53bb\u8a2a\u554f\u4e00\u500b\u5217\u8868\u985e\u578b\u7684\u9375\uff0c\u5247\u6703\u8fd4\u56de nil\uff1a<\/li>\n<\/ul>\n<pre><code>LPUSH mylist \"value1\"\nGET mylist\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c<code>GET mylist<\/code> \u5c07\u8fd4\u56de nil\uff0c\u56e0\u70ba <code>mylist<\/code> \u662f\u4e00\u500b\u5217\u8868\uff0c\u800c\u4e0d\u662f\u5b57\u7b26\u4e32\u3002<\/p>\n<ul>\n<li><strong>\u904e\u671f\u7684\u9375\uff1a<\/strong>\u5982\u679c\u4e00\u500b\u9375\u8a2d\u7f6e\u4e86\u904e\u671f\u6642\u9593\uff0c\u7576\u904e\u671f\u6642\u9593\u5230\u9054\u5f8c\uff0c\u8a72\u9375\u5c07\u88ab\u81ea\u52d5\u522a\u9664\uff0c\u96a8\u5f8c\u7684\u8a2a\u554f\u5c07\u8fd4\u56de nil\u3002\u4f8b\u5982\uff1a<\/li>\n<\/ul>\n<pre><code>SET temp_key \"temporary value\" EX 5\n# 5\u79d2\u5f8c\nGET temp_key\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c<code>temp_key<\/code> \u5728 5 \u79d2\u5f8c\u5c07\u8fd4\u56de nil\uff0c\u56e0\u70ba\u5b83\u5df2\u7d93\u904e\u671f\u3002<\/p>\n<h2 id=\"%e5%a6%82%e4%bd%95%e8%99%95%e7%90%86-redis-%e8%bf%94%e5%9b%9e-nil-%e7%9a%84%e6%83%85%e6%b3%81-BQHoHfknkp\">\u5982\u4f55\u8655\u7406 Redis \u8fd4\u56de nil \u7684\u60c5\u6cc1<\/h2>\n<p>\u9762\u5c0d Redis \u8fd4\u56de nil \u7684\u60c5\u6cc1\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u63a1\u53d6\u4ee5\u4e0b\u5e7e\u7a2e\u65b9\u6cd5\u4f86\u8655\u7406\uff1a<\/p>\n<ul>\n<li><strong>\u6aa2\u67e5\u9375\u662f\u5426\u5b58\u5728\uff1a<\/strong>\u5728\u57f7\u884c <code>GET<\/code> \u547d\u4ee4\u4e4b\u524d\uff0c\u53ef\u4ee5\u4f7f\u7528 <code>EXISTS<\/code> \u547d\u4ee4\u4f86\u6aa2\u67e5\u9375\u662f\u5426\u5b58\u5728\uff1a<\/li>\n<\/ul>\n<pre><code>EXISTS mykey\n<\/code><\/pre>\n<p>\u5982\u679c\u8fd4\u56de 1\uff0c\u5247\u8868\u793a\u9375\u5b58\u5728\uff1b\u5982\u679c\u8fd4\u56de 0\uff0c\u5247\u8868\u793a\u9375\u4e0d\u5b58\u5728\u3002<\/p>\n<ul>\n<li><strong>\u4f7f\u7528\u9069\u7576\u7684\u6578\u64da\u985e\u578b\uff1a<\/strong>\u5728\u8a2a\u554f\u9375\u4e4b\u524d\uff0c\u78ba\u4fdd\u4f7f\u7528\u6b63\u78ba\u7684\u6578\u64da\u985e\u578b\u3002\u4f8b\u5982\uff0c\u5c0d\u65bc\u5217\u8868\u985e\u578b\u7684\u9375\uff0c\u61c9\u4f7f\u7528 <code>LRANGE<\/code> \u547d\u4ee4\u4f86\u7372\u53d6\u5217\u8868\u7684\u503c\uff1a<\/li>\n<\/ul>\n<pre><code>LRANGE mylist 0 -1\n<\/code><\/pre>\n<ul>\n<li><strong>\u8a2d\u7f6e\u5408\u7406\u7684\u904e\u671f\u6642\u9593\uff1a<\/strong>\u5728\u8a2d\u7f6e\u9375\u7684\u904e\u671f\u6642\u9593\u6642\uff0c\u61c9\u6839\u64da\u5be6\u969b\u9700\u6c42\u4f86\u8a2d\u7f6e\uff0c\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u904e\u671f\u5c0e\u81f4\u6578\u64da\u4e1f\u5931\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e8%ab%96-BQHoHfknkp\">\u7d50\u8ad6<\/h2>\n<p>Redis \u8fd4\u56de nil \u7684\u539f\u56e0\u591a\u7a2e\u591a\u6a23\uff0c\u5f9e\u9375\u4e0d\u5b58\u5728\u5230\u6578\u64da\u985e\u578b\u4e0d\u5339\u914d\uff0c\u518d\u5230\u904e\u671f\u7684\u9375\u3002\u4e86\u89e3\u9019\u4e9b\u539f\u56e0\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u6709\u6548\u5730\u4f7f\u7528 Redis\uff0c\u4e26\u907f\u514d\u5e38\u898b\u7684\u932f\u8aa4\u3002\u5728\u958b\u767c\u904e\u7a0b\u4e2d\uff0c\u5efa\u8b70\u4f7f\u7528\u9069\u7576\u7684\u6aa2\u67e5\u548c\u8655\u7406\u65b9\u6cd5\uff0c\u4ee5\u78ba\u4fdd\u6578\u64da\u7684\u5b8c\u6574\u6027\u548c\u53ef\u7528\u6027\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2f VPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u60a8\u7684\u9700\u6c42\u3002\u7121\u8ad6\u662f\u6578\u64da\u5eab\u7ba1\u7406\u9084\u662f\u61c9\u7528\u90e8\u7f72\uff0c\u6211\u5011\u7684 <a href=\"https:\/\/server.hk\">\u4f3a\u670d\u5668<\/a> \u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3Redis\u8fd4\u56denil\u7684\u539f\u56e0\uff0c\u63a2\u8a0e\u5e38\u898b\u60c5\u6cc1\u53ca\u89e3\u6c7a\u65b9\u6848\uff0c\u5e6b\u52a9\u4f60\u66f4\u6709\u6548\u5730\u4f7f\u7528Redis\u6578\u64da\u5eab\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-97406","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/97406","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=97406"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/97406\/revisions"}],"predecessor-version":[{"id":97407,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/97406\/revisions\/97407"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=97406"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=97406"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=97406"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}