{"id":181026,"date":"2024-11-09T14:38:50","date_gmt":"2024-11-09T06:38:50","guid":{"rendered":"https:\/\/server.hk\/cnblog\/181026\/"},"modified":"2024-11-09T14:38:51","modified_gmt":"2024-11-09T06:38:51","slug":"%e6%b7%b1%e5%85%a5%e7%90%86%e8%a7%a3qt%e6%95%b8%e6%93%9a%e5%ba%ab%e7%b7%a8%e7%a8%8b%e5%8e%9f%e7%90%86%ef%bc%8c%e8%bc%95%e9%ac%86%e5%af%a6%e7%8f%be%e6%95%b8%e6%93%9a%e8%99%95%e7%90%86-qt%e6%95%b8","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/181026\/","title":{"rendered":"\u6df1\u5165\u7406\u89e3Qt\u6578\u64da\u5eab\u7de8\u7a0b\u539f\u7406\uff0c\u8f15\u9b06\u5be6\u73fe\u6578\u64da\u8655\u7406 (qt\u6578\u64da\u5eab\u7de8\u7a0b\u76f8\u95dc\u539f\u7406)"},"content":{"rendered":"<h1 id=\"%e6%b7%b1%e5%85%a5%e7%90%86%e8%a7%a3qt%e6%95%b8%e6%93%9a%e5%ba%ab%e7%b7%a8%e7%a8%8b%e5%8e%9f%e7%90%86%ef%bc%8c%e8%bc%95%e9%ac%86%e5%af%a6%e7%8f%be%e6%95%b8%e6%93%9a%e8%99%95%e7%90%86-sbFJkcVsYp\">\u6df1\u5165\u7406\u89e3Qt\u6578\u64da\u5eab\u7de8\u7a0b\u539f\u7406\uff0c\u8f15\u9b06\u5be6\u73fe\u6578\u64da\u8655\u7406<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u8edf\u4ef6\u958b\u767c\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u4f7f\u7528\u5df2\u7d93\u6210\u70ba\u4e0d\u53ef\u6216\u7f3a\u7684\u4e00\u90e8\u5206\u3002Qt\u4f5c\u70ba\u4e00\u500b\u8de8\u5e73\u53f0\u7684\u61c9\u7528\u7a0b\u5e8f\u958b\u767c\u6846\u67b6\uff0c\u63d0\u4f9b\u4e86\u5f37\u5927\u7684\u6578\u64da\u5eab\u652f\u6301\uff0c\u4f7f\u5f97\u958b\u767c\u8005\u80fd\u5920\u8f15\u9b06\u5730\u9032\u884c\u6578\u64da\u8655\u7406\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eQt\u6578\u64da\u5eab\u7de8\u7a0b\u7684\u57fa\u672c\u539f\u7406\uff0c\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u597d\u5730\u7406\u89e3\u5982\u4f55\u5728Qt\u4e2d\u5be6\u73fe\u6578\u64da\u5eab\u64cd\u4f5c\u3002<\/p>\n<h2 id=\"qt%e6%95%b8%e6%93%9a%e5%ba%ab%e6%a8%a1%e5%a1%8a%e6%a6%82%e8%bf%b0-sbFJkcVsYp\">Qt\u6578\u64da\u5eab\u6a21\u584a\u6982\u8ff0<\/h2>\n<p>Qt\u63d0\u4f9b\u4e86\u4e00\u500b\u540d\u70baQtSql\u7684\u6a21\u584a\uff0c\u5c08\u9580\u7528\u65bc\u6578\u64da\u5eab\u7684\u64cd\u4f5c\u3002\u9019\u500b\u6a21\u584a\u652f\u6301\u591a\u7a2e\u6578\u64da\u5eab\u7cfb\u7d71\uff0c\u5305\u62ecSQLite\u3001MySQL\u3001PostgreSQL\u7b49\u3002\u958b\u767c\u8005\u53ef\u4ee5\u901a\u904eQtSql\u6a21\u584a\u4f86\u57f7\u884cSQL\u67e5\u8a62\u3001\u7ba1\u7406\u6578\u64da\u5eab\u9023\u63a5\u4ee5\u53ca\u8655\u7406\u6578\u64da\u3002<\/p>\n<h3 id=\"%e5%9f%ba%e6%9c%ac%e7%b5%84%e4%bb%b6-sbFJkcVsYp\">\u57fa\u672c\u7d44\u4ef6<\/h3>\n<ul>\n<li><strong>QSqlDatabase<\/strong>: \u7528\u65bc\u7ba1\u7406\u6578\u64da\u5eab\u9023\u63a5\u7684\u985e\u3002<\/li>\n<li><strong>QSqlQuery<\/strong>: \u7528\u65bc\u57f7\u884cSQL\u67e5\u8a62\u7684\u985e\u3002<\/li>\n<li><strong>QSqlTableModel<\/strong>: \u7528\u65bc\u5c07\u6578\u64da\u5eab\u8868\u6620\u5c04\u5230Qt\u8996\u5716\u7684\u6a21\u578b\u985e\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%bb%ba%e7%ab%8b%e6%95%b8%e6%93%9a%e5%ba%ab%e9%80%a3%e6%8e%a5-sbFJkcVsYp\">\u5efa\u7acb\u6578\u64da\u5eab\u9023\u63a5<\/h2>\n<p>\u5728\u9032\u884c\u6578\u64da\u5eab\u64cd\u4f5c\u4e4b\u524d\uff0c\u9996\u5148\u9700\u8981\u5efa\u7acb\u6578\u64da\u5eab\u9023\u63a5\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u4f7f\u7528Qt\u4f86\u9023\u63a5SQLite\u6578\u64da\u5eab\uff1a<\/p>\n<pre><code class=\"language-cpp\">\n#include &lt;QSqlDatabase&gt;\n#include &lt;QSqlError&gt;\n#include &lt;QSqlQuery&gt;\n#include &lt;QDebug&gt;\n\nvoid connectToDatabase() {\n    QSqlDatabase db = QSqlDatabase::addDatabase(\"QSQLITE\");\n    db.setDatabaseName(\"example.db\");\n\n    if (!db.open()) {\n        qDebug() &lt;&lt; \"\u7121\u6cd5\u9023\u63a5\u5230\u6578\u64da\u5eab:\" &lt;&lt; db.lastError().text();\n    } else {\n        qDebug() &lt;&lt; \"\u6210\u529f\u9023\u63a5\u5230\u6578\u64da\u5eab\";\n    }\n}\n<\/code><\/pre>\n<h2 id=\"%e5%9f%b7%e8%a1%8csql%e6%9f%a5%e8%a9%a2-sbFJkcVsYp\">\u57f7\u884cSQL\u67e5\u8a62<\/h2>\n<p>\u4e00\u65e6\u6210\u529f\u9023\u63a5\u5230\u6578\u64da\u5eab\uff0c\u5c31\u53ef\u4ee5\u4f7f\u7528QSqlQuery\u4f86\u57f7\u884cSQL\u67e5\u8a62\u3002\u4ee5\u4e0b\u793a\u4f8b\u5c55\u793a\u4e86\u5982\u4f55\u5275\u5efa\u4e00\u500b\u8868\u4e26\u63d2\u5165\u6578\u64da\uff1a<\/p>\n<pre><code class=\"language-cpp\">\nvoid createTable() {\n    QSqlQuery query;\n    query.exec(\"CREATE TABLE IF NOT EXISTS users (id INTEGER PRIMARY KEY, name TEXT)\");\n\n    query.prepare(\"INSERT INTO users (name) VALUES (:name)\");\n    query.bindValue(\":name\", \"Alice\");\n    query.exec();\n}\n<\/code><\/pre>\n<h2 id=\"%e6%9f%a5%e8%a9%a2%e6%95%b8%e6%93%9a-sbFJkcVsYp\">\u67e5\u8a62\u6578\u64da<\/h2>\n<p>\u9664\u4e86\u63d2\u5165\u6578\u64da\uff0c\u9084\u53ef\u4ee5\u67e5\u8a62\u6578\u64da\u3002\u4ee5\u4e0b\u793a\u4f8b\u5c55\u793a\u4e86\u5982\u4f55\u5f9e\u6578\u64da\u5eab\u4e2d\u6aa2\u7d22\u6578\u64da\uff1a<\/p>\n<pre><code class=\"language-cpp\">\nvoid fetchData() {\n    QSqlQuery query(\"SELECT * FROM users\");\n    while (query.next()) {\n        int id = query.value(0).toInt();\n        QString name = query.value(1).toString();\n        qDebug() &lt;&lt; \"ID:\" &lt;&lt; id &lt;&lt; \"Name:\" &lt;&lt; name;\n    }\n}\n<\/code><\/pre>\n<h2 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e9%8c%af%e8%aa%a4%e8%99%95%e7%90%86-sbFJkcVsYp\">\u6578\u64da\u5eab\u932f\u8aa4\u8655\u7406<\/h2>\n<p>\u5728\u9032\u884c\u6578\u64da\u5eab\u64cd\u4f5c\u6642\uff0c\u932f\u8aa4\u8655\u7406\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002Qt\u63d0\u4f9b\u4e86QSqlError\u985e\u4f86\u5e6b\u52a9\u958b\u767c\u8005\u6355\u7372\u548c\u8655\u7406\u932f\u8aa4\u3002\u53ef\u4ee5\u901a\u904eQSqlQuery\u7684lastError()\u65b9\u6cd5\u4f86\u7372\u53d6\u6700\u8fd1\u7684\u932f\u8aa4\u4fe1\u606f\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-sbFJkcVsYp\">\u7e3d\u7d50<\/h2>\n<p>Qt\u7684\u6578\u64da\u5eab\u7de8\u7a0b\u63d0\u4f9b\u4e86\u4e00\u500b\u7c21\u55ae\u800c\u5f37\u5927\u7684\u65b9\u5f0f\u4f86\u9032\u884c\u6578\u64da\u8655\u7406\u3002\u901a\u904e\u7406\u89e3QtSql\u6a21\u584a\u7684\u57fa\u672c\u7d44\u4ef6\u548c\u64cd\u4f5c\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u8f15\u9b06\u5730\u5be6\u73fe\u5404\u7a2e\u6578\u64da\u5eab\u529f\u80fd\u3002\u7121\u8ad6\u662f\u5efa\u7acb\u9023\u63a5\u3001\u57f7\u884c\u67e5\u8a62\u9084\u662f\u8655\u7406\u932f\u8aa4\uff0cQt\u90fd\u63d0\u4f9b\u4e86\u8c50\u5bcc\u7684API\u4f86\u652f\u6301\u9019\u4e9b\u64cd\u4f5c\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u7a69\u5b9a\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4f86\u90e8\u7f72\u60a8\u7684Qt\u61c9\u7528\u7a0b\u5e8f\uff0cServer.HK\u63d0\u4f9b\u4e86\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u4e0d\u540c\u9700\u6c42\u7684\u7528\u6236\u3002\u7121\u8ad6\u662f\u5c0f\u578b\u9805\u76ee\u9084\u662f\u5927\u578b\u61c9\u7528\uff0c\u60a8\u90fd\u53ef\u4ee5\u5728\u6211\u5011\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a> \u4e0a\u627e\u5230\u5408\u9069\u7684\u89e3\u6c7a\u65b9\u6848\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6df1\u5165\u7406\u89e3Qt\u6578\u64da\u5eab\u7de8\u7a0b\u539f\u7406\uff0c\u638c\u63e1\u6578\u64da\u8655\u7406\u6280\u5de7\uff0c\u8f15\u9b06\u5be6\u73fe\u9ad8\u6548\u7684\u6578\u64da\u7ba1\u7406\u8207\u64cd\u4f5c\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-181026","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/181026","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=181026"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/181026\/revisions"}],"predecessor-version":[{"id":181027,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/181026\/revisions\/181027"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=181026"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=181026"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=181026"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}