{"id":97160,"date":"2024-10-20T15:30:18","date_gmt":"2024-10-20T07:30:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/97160\/"},"modified":"2024-10-20T15:30:19","modified_gmt":"2024-10-20T07:30:19","slug":"qt%e6%95%b8%e6%93%9a%e5%ba%ab%e5%8a%a0%e9%8e%96%ef%bc%9a%e4%bf%9d%e8%ad%89%e6%95%b8%e6%93%9a%e5%ae%89%e5%85%a8-qt-%e6%95%b8%e6%93%9a%e5%ba%ab%e5%8a%a0%e9%8e%96","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/97160\/","title":{"rendered":"Qt\u6578\u64da\u5eab\u52a0\u9396\uff1a\u4fdd\u8b49\u6578\u64da\u5b89\u5168 (qt \u6578\u64da\u5eab\u52a0\u9396)"},"content":{"rendered":"<h1 id=\"qt%e6%95%b8%e6%93%9a%e5%ba%ab%e5%8a%a0%e9%8e%96%ef%bc%9a%e4%bf%9d%e8%ad%89%e6%95%b8%e6%93%9a%e5%ae%89%e5%85%a8-qYLhTdtHJW\">Qt\u6578\u64da\u5eab\u52a0\u9396\uff1a\u4fdd\u8b49\u6578\u64da\u5b89\u5168<\/h1>\n<p>\u5728\u7576\u4eca\u6578\u64da\u9a45\u52d5\u7684\u4e16\u754c\u4e2d\uff0c\u6578\u64da\u5b89\u5168\u6027\u6210\u70ba\u4e86\u6bcf\u500b\u958b\u767c\u8005\u548c\u4f01\u696d\u7684\u9996\u8981\u4efb\u52d9\u3002Qt\u4f5c\u70ba\u4e00\u500b\u8de8\u5e73\u53f0\u7684\u61c9\u7528\u7a0b\u5e8f\u958b\u767c\u6846\u67b6\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u5de5\u5177\u4f86\u7ba1\u7406\u6578\u64da\u5eab\uff0c\u5176\u4e2d\u5305\u62ec\u6578\u64da\u5eab\u52a0\u9396\u7684\u529f\u80fd\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eQt\u6578\u64da\u5eab\u52a0\u9396\u7684\u539f\u7406\u53ca\u5176\u5728\u4fdd\u8b49\u6578\u64da\u5b89\u5168\u65b9\u9762\u7684\u91cd\u8981\u6027\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e6%95%b8%e6%93%9a%e5%ba%ab%e5%8a%a0%e9%8e%96%ef%bc%9f-qYLhTdtHJW\">\u4ec0\u9ebc\u662f\u6578\u64da\u5eab\u52a0\u9396\uff1f<\/h2>\n<p>\u6578\u64da\u5eab\u52a0\u9396\u662f\u6307\u5728\u6578\u64da\u5eab\u64cd\u4f5c\u904e\u7a0b\u4e2d\uff0c\u901a\u904e\u5c0d\u7279\u5b9a\u6578\u64da\u9032\u884c\u9396\u5b9a\u4f86\u9632\u6b62\u5176\u4ed6\u64cd\u4f5c\u5c0d\u5176\u9032\u884c\u4fee\u6539\u3002\u9019\u6a23\u53ef\u4ee5\u907f\u514d\u6578\u64da\u4e0d\u4e00\u81f4\u7684\u60c5\u6cc1\u767c\u751f\uff0c\u7279\u5225\u662f\u5728\u591a\u7528\u6236\u74b0\u5883\u4e2d\u3002Qt\u63d0\u4f9b\u4e86\u591a\u7a2e\u9396\u5b9a\u6a5f\u5236\uff0c\u5305\u62ec\u884c\u9396\u548c\u8868\u9396\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u6839\u64da\u5177\u9ad4\u9700\u6c42\u9078\u64c7\u5408\u9069\u7684\u9396\u5b9a\u65b9\u5f0f\u3002<\/p>\n<h2 id=\"qt%e4%b8%ad%e7%9a%84%e6%95%b8%e6%93%9a%e5%ba%ab%e5%8a%a0%e9%8e%96%e6%a9%9f%e5%88%b6-qYLhTdtHJW\">Qt\u4e2d\u7684\u6578\u64da\u5eab\u52a0\u9396\u6a5f\u5236<\/h2>\n<p>\u5728Qt\u4e2d\uff0c\u6578\u64da\u5eab\u52a0\u9396\u4e3b\u8981\u901a\u904eQSqlDatabase\u548cQSqlQuery\u985e\u4f86\u5be6\u73fe\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684\u52a0\u9396\u65b9\u6cd5\uff1a<\/p>\n<h3 id=\"1-%e8%a1%8c%e9%8e%96-qYLhTdtHJW\">1. \u884c\u9396<\/h3>\n<p>\u884c\u9396\u662f\u6307\u5c0d\u6578\u64da\u8868\u4e2d\u7684\u7279\u5b9a\u884c\u9032\u884c\u9396\u5b9a\u3002\u9019\u7a2e\u9396\u5b9a\u65b9\u5f0f\u5141\u8a31\u5176\u4ed6\u7528\u6236\u8a2a\u554f\u540c\u4e00\u8868\u4e2d\u7684\u5176\u4ed6\u884c\uff0c\u5f9e\u800c\u63d0\u9ad8\u4e86\u4e26\u767c\u6027\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528Qt\u9032\u884c\u884c\u9396\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>QSqlQuery query;\nquery.exec(\"SELECT * FROM users WHERE id = 1 FOR UPDATE\");\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u5c0did\u70ba1\u7684\u884c\u9032\u884c\u4e86\u9396\u5b9a\uff0c\u5176\u4ed6\u7528\u6236\u5728\u6b64\u671f\u9593\u7121\u6cd5\u4fee\u6539\u8a72\u884c\u7684\u6578\u64da\u3002<\/p>\n<h3 id=\"2-%e8%a1%a8%e9%8e%96-qYLhTdtHJW\">2. \u8868\u9396<\/h3>\n<p>\u8868\u9396\u5247\u662f\u5c0d\u6574\u500b\u8868\u9032\u884c\u9396\u5b9a\uff0c\u9019\u610f\u5473\u8457\u5728\u9396\u5b9a\u671f\u9593\uff0c\u5176\u4ed6\u7528\u6236\u7121\u6cd5\u5c0d\u8a72\u8868\u9032\u884c\u4efb\u4f55\u4fee\u6539\u3002\u9019\u7a2e\u65b9\u5f0f\u9069\u5408\u65bc\u9700\u8981\u4fdd\u8b49\u6574\u9ad4\u6578\u64da\u4e00\u81f4\u6027\u7684\u64cd\u4f5c\u3002\u4ee5\u4e0b\u662f\u8868\u9396\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>QSqlQuery query;\nquery.exec(\"LOCK TABLE users WRITE\");\n<\/code><\/pre>\n<p>\u9019\u6bb5\u4ee3\u78bc\u5c07\u5c0dusers\u8868\u9032\u884c\u5beb\u5165\u9396\u5b9a\uff0c\u78ba\u4fdd\u5728\u9396\u5b9a\u671f\u9593\u4e0d\u6703\u6709\u5176\u4ed6\u5beb\u5165\u64cd\u4f5c\u3002<\/p>\n<h2 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e5%8a%a0%e9%8e%96%e7%9a%84%e5%84%aa%e5%8b%a2-qYLhTdtHJW\">\u6578\u64da\u5eab\u52a0\u9396\u7684\u512a\u52e2<\/h2>\n<ul>\n<li><strong>\u6578\u64da\u4e00\u81f4\u6027\uff1a<\/strong>\u901a\u904e\u52a0\u9396\uff0c\u53ef\u4ee5\u78ba\u4fdd\u5728\u591a\u7528\u6236\u74b0\u5883\u4e2d\u6578\u64da\u7684\u4e00\u81f4\u6027\uff0c\u907f\u514d\u56e0\u540c\u6642\u64cd\u4f5c\u5c0e\u81f4\u7684\u6578\u64da\u932f\u8aa4\u3002<\/li>\n<li><strong>\u9632\u6b62\u6578\u64da\u640d\u58de\uff1a<\/strong>\u5728\u9032\u884c\u91cd\u8981\u7684\u6578\u64da\u64cd\u4f5c\u6642\uff0c\u52a0\u9396\u53ef\u4ee5\u9632\u6b62\u5176\u4ed6\u64cd\u4f5c\u5c0d\u6578\u64da\u7684\u5e72\u64fe\uff0c\u5f9e\u800c\u964d\u4f4e\u6578\u64da\u640d\u58de\u7684\u98a8\u96aa\u3002<\/li>\n<li><strong>\u63d0\u9ad8\u6578\u64da\u5b89\u5168\u6027\uff1a<\/strong>\u901a\u904e\u5408\u7406\u7684\u9396\u5b9a\u7b56\u7565\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u4fdd\u8b77\u654f\u611f\u6578\u64da\uff0c\u9632\u6b62\u672a\u7d93\u6388\u6b0a\u7684\u8a2a\u554f\u3002<\/li>\n<\/ul>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-qYLhTdtHJW\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u96d6\u7136\u6578\u64da\u5eab\u52a0\u9396\u80fd\u5920\u63d0\u9ad8\u6578\u64da\u5b89\u5168\u6027\uff0c\u4f46\u904e\u5ea6\u4f7f\u7528\u9396\u5b9a\u53ef\u80fd\u6703\u5c0e\u81f4\u6027\u80fd\u554f\u984c\u3002\u56e0\u6b64\uff0c\u5728\u8a2d\u8a08\u6578\u64da\u5eab\u64cd\u4f5c\u6642\uff0c\u958b\u767c\u8005\u61c9\u6839\u64da\u5177\u9ad4\u60c5\u6cc1\u9078\u64c7\u5408\u9069\u7684\u9396\u5b9a\u7b56\u7565\uff0c\u4e26\u8003\u616e\u5230\u7cfb\u7d71\u7684\u6574\u9ad4\u6027\u80fd\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-qYLhTdtHJW\">\u7d50\u8ad6<\/h2>\n<p>Qt\u63d0\u4f9b\u7684\u6578\u64da\u5eab\u52a0\u9396\u529f\u80fd\u662f\u4fdd\u8b49\u6578\u64da\u5b89\u5168\u7684\u91cd\u8981\u5de5\u5177\u3002\u901a\u904e\u5408\u7406\u4f7f\u7528\u884c\u9396\u548c\u8868\u9396\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u6709\u6548\u5730\u7ba1\u7406\u6578\u64da\u7684\u4e00\u81f4\u6027\u548c\u5b89\u5168\u6027\u3002\u5728\u7576\u524d\u6578\u64da\u5b89\u5168\u65e5\u76ca\u53d7\u5230\u91cd\u8996\u7684\u80cc\u666f\u4e0b\uff0c\u638c\u63e1\u9019\u4e9b\u6280\u8853\u5c0d\u65bc\u958b\u767c\u8005\u4f86\u8aaa\u81f3\u95dc\u91cd\u8981\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u95dc\u65bc\u6578\u64da\u5eab\u548c\u4f3a\u670d\u5668\u7684\u89e3\u6c7a\u65b9\u6848\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9 <a href=\"https:\/\/server.hk\">Server.HK<\/a>\uff0c\u63a2\u7d22\u6211\u5011\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u548c <a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a> \u670d\u52d9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22Qt\u6578\u64da\u5eab\u52a0\u9396\u6280\u8853\uff0c\u78ba\u4fdd\u6578\u64da\u5b89\u5168\u6027\u8207\u5b8c\u6574\u6027\uff0c\u9632\u6b62\u672a\u6388\u6b0a\u8a2a\u554f\uff0c\u63d0\u5347\u61c9\u7528\u7a0b\u5e8f\u7684\u53ef\u9760\u6027\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-97160","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/97160","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=97160"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/97160\/revisions"}],"predecessor-version":[{"id":97161,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/97160\/revisions\/97161"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=97160"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=97160"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=97160"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}