{"id":97158,"date":"2024-10-20T15:29:18","date_gmt":"2024-10-20T07:29:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/97158\/"},"modified":"2024-10-20T15:29:19","modified_gmt":"2024-10-20T07:29:19","slug":"qt%e6%95%b8%e6%93%9a%e5%ba%ab%e6%9f%a5%e8%a9%a2%e5%bf%ab%e9%80%9f%e9%ab%98%e6%95%88%e7%9a%84%e6%95%b8%e6%93%9a%e6%aa%a2%e7%b4%a2%e6%96%b9%e6%b3%95-qt-%e6%95%b8%e6%93%9a%e5%ba%ab-%e6%9f%a5%e8%a9%a2","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/97158\/","title":{"rendered":"Qt\u6578\u64da\u5eab\u67e5\u8a62\u5feb\u901f\u9ad8\u6548\u7684\u6578\u64da\u6aa2\u7d22\u65b9\u6cd5 (qt \u6578\u64da\u5eab \u67e5\u8a62)"},"content":{"rendered":"<h1 id=\"qt%e6%95%b8%e6%93%9a%e5%ba%ab%e6%9f%a5%e8%a9%a2%e5%bf%ab%e9%80%9f%e9%ab%98%e6%95%88%e7%9a%84%e6%95%b8%e6%93%9a%e6%aa%a2%e7%b4%a2%e6%96%b9%e6%b3%95-QvcOMKxrGf\">Qt\u6578\u64da\u5eab\u67e5\u8a62\u5feb\u901f\u9ad8\u6548\u7684\u6578\u64da\u6aa2\u7d22\u65b9\u6cd5<\/h1>\n<p>\u5728\u73fe\u4eca\u7684\u8edf\u9ad4\u958b\u767c\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u4f7f\u7528\u5df2\u6210\u70ba\u4e0d\u53ef\u6216\u7f3a\u7684\u4e00\u90e8\u5206\u3002Qt\u4f5c\u70ba\u4e00\u500b\u8de8\u5e73\u53f0\u7684\u61c9\u7528\u7a0b\u5f0f\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\u6aa2\u7d22\u548c\u64cd\u4f5c\u3002\u672c\u6587\u5c07\u63a2\u8a0eQt\u4e2d\u6578\u64da\u5eab\u67e5\u8a62\u7684\u9ad8\u6548\u65b9\u6cd5\uff0c\u5e6b\u52a9\u958b\u767c\u8005\u63d0\u5347\u6578\u64da\u6aa2\u7d22\u7684\u6027\u80fd\u3002<\/p>\n<h2 id=\"qt%e6%95%b8%e6%93%9a%e5%ba%ab%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-QvcOMKxrGf\">Qt\u6578\u64da\u5eab\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>Qt\u652f\u6301\u591a\u7a2e\u6578\u64da\u5eab\uff0c\u5305\u62ecSQLite\u3001MySQL\u3001PostgreSQL\u7b49\u3002\u4f7f\u7528Qt\u9032\u884c\u6578\u64da\u5eab\u64cd\u4f5c\uff0c\u958b\u767c\u8005\u9700\u8981\u4e86\u89e3Qt\u7684\u6578\u64da\u5eab\u9a45\u52d5\u548c\u76f8\u95dc\u7684API\u3002Qt\u7684\u6578\u64da\u5eab\u6a21\u7d44\u63d0\u4f9b\u4e86\u7c21\u55ae\u6613\u7528\u7684\u63a5\u53e3\uff0c\u8b93\u958b\u767c\u8005\u80fd\u5920\u8f15\u9b06\u5730\u9023\u63a5\u3001\u67e5\u8a62\u548c\u64cd\u4f5c\u6578\u64da\u3002<\/p>\n<h2 id=\"%e5%bb%ba%e7%ab%8b%e6%95%b8%e6%93%9a%e5%ba%ab%e9%80%a3%e6%8e%a5-QvcOMKxrGf\">\u5efa\u7acb\u6578\u64da\u5eab\u9023\u63a5<\/h2>\n<p>\u5728\u9032\u884c\u6578\u64da\u6aa2\u7d22\u4e4b\u524d\uff0c\u9996\u5148\u9700\u8981\u5efa\u7acb\u6578\u64da\u5eab\u9023\u63a5\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528SQLite\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>QSqlDatabase db = QSqlDatabase::addDatabase(\"QSQLITE\");\ndb.setDatabaseName(\"example.db\");\n\nif (!db.open()) {\n    qDebug() &lt;&lt; \"\u7121\u6cd5\u9023\u63a5\u5230\u6578\u64da\u5eab\uff01\";\n}<\/code><\/pre>\n<p>\u5728\u9019\u6bb5\u4ee3\u78bc\u4e2d\uff0c\u6211\u5011\u9996\u5148\u6dfb\u52a0\u4e86\u4e00\u500bSQLite\u6578\u64da\u5eab\u9a45\u52d5\uff0c\u7136\u5f8c\u8a2d\u7f6e\u6578\u64da\u5eab\u540d\u7a31\u4e26\u5617\u8a66\u6253\u958b\u9023\u63a5\u3002\u5982\u679c\u9023\u63a5\u5931\u6557\uff0c\u5247\u6703\u8f38\u51fa\u932f\u8aa4\u4fe1\u606f\u3002<\/p>\n<h2 id=\"%e9%ab%98%e6%95%88%e7%9a%84%e6%95%b8%e6%93%9a%e6%aa%a2%e7%b4%a2%e6%96%b9%e6%b3%95-QvcOMKxrGf\">\u9ad8\u6548\u7684\u6578\u64da\u6aa2\u7d22\u65b9\u6cd5<\/h2>\n<p>\u5728Qt\u4e2d\u9032\u884c\u6578\u64da\u6aa2\u7d22\u6642\uff0c\u4f7f\u7528\u5408\u9069\u7684\u67e5\u8a62\u8a9e\u53e5\u548c\u65b9\u6cd5\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u63d0\u9ad8\u6578\u64da\u6aa2\u7d22\u6548\u7387\u7684\u5efa\u8b70\uff1a<\/p>\n<ul>\n<li><strong>\u4f7f\u7528\u9810\u8655\u7406\u8a9e\u53e5\uff1a<\/strong>\u9810\u8655\u7406\u8a9e\u53e5\u53ef\u4ee5\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\uff0c\u4e26\u9632\u6b62SQL\u6ce8\u5165\u653b\u64ca\u3002<\/li>\n<li><strong>\u9650\u5236\u67e5\u8a62\u7d50\u679c\uff1a<\/strong>\u4f7f\u7528LIMIT\u5b50\u53e5\u4f86\u9650\u5236\u8fd4\u56de\u7684\u8a18\u9304\u6578\uff0c\u9019\u6a23\u53ef\u4ee5\u6e1b\u5c11\u6578\u64da\u50b3\u8f38\u7684\u8ca0\u64d4\u3002<\/li>\n<li><strong>\u7d22\u5f15\u7684\u4f7f\u7528\uff1a<\/strong>\u5728\u6578\u64da\u8868\u4e2d\u5efa\u7acb\u7d22\u5f15\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u901f\u5ea6\uff0c\u7279\u5225\u662f\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\u3002<\/li>\n<\/ul>\n<h3 id=\"%e7%a4%ba%e4%be%8b%ef%bc%9a%e4%bd%bf%e7%94%a8%e9%a0%90%e8%99%95%e7%90%86%e8%aa%9e%e5%8f%a5%e9%80%b2%e8%a1%8c%e6%9f%a5%e8%a9%a2-QvcOMKxrGf\">\u793a\u4f8b\uff1a\u4f7f\u7528\u9810\u8655\u7406\u8a9e\u53e5\u9032\u884c\u67e5\u8a62<\/h3>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528\u9810\u8655\u7406\u8a9e\u53e5\u9032\u884c\u6578\u64da\u6aa2\u7d22\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>QSqlQuery query;\nquery.prepare(\"SELECT * FROM users WHERE age &gt; :age\");\nquery.bindValue(\":age\", 18);\n\nif (query.exec()) {\n    while (query.next()) {\n        QString name = query.value(\"name\").toString();\n        qDebug() &lt;&lt; \"\u7528\u6236\u540d\uff1a\" &lt;&lt; name;\n    }\n} else {\n    qDebug() &lt;&lt; \"\u67e5\u8a62\u5931\u6557\uff1a\" &lt;&lt; query.lastError().text();\n}<\/code><\/pre>\n<p>\u5728\u9019\u6bb5\u4ee3\u78bc\u4e2d\uff0c\u6211\u5011\u4f7f\u7528\u4e86\u9810\u8655\u7406\u8a9e\u53e5\u4f86\u67e5\u8a62\u5e74\u9f61\u5927\u65bc18\u7684\u7528\u6236\u3002\u9019\u6a23\u4e0d\u50c5\u63d0\u9ad8\u4e86\u67e5\u8a62\u7684\u5b89\u5168\u6027\uff0c\u9084\u80fd\u63d0\u5347\u6027\u80fd\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-QvcOMKxrGf\">\u7d50\u8ad6<\/h2>\n<p>Qt\u63d0\u4f9b\u4e86\u591a\u7a2e\u9ad8\u6548\u7684\u6578\u64da\u5eab\u67e5\u8a62\u65b9\u6cd5\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u901a\u904e\u4f7f\u7528\u9810\u8655\u7406\u8a9e\u53e5\u3001\u9650\u5236\u67e5\u8a62\u7d50\u679c\u548c\u5efa\u7acb\u7d22\u5f15\u7b49\u65b9\u5f0f\u4f86\u63d0\u5347\u6578\u64da\u6aa2\u7d22\u7684\u6027\u80fd\u3002\u96a8\u8457\u6578\u64da\u91cf\u7684\u589e\u9577\uff0c\u9019\u4e9b\u65b9\u6cd5\u5c07\u8b8a\u5f97\u8d8a\u4f86\u8d8a\u91cd\u8981\uff0c\u5e6b\u52a9\u958b\u767c\u8005\u5728\u61c9\u7528\u7a0b\u5f0f\u4e2d\u5be6\u73fe\u5feb\u901f\u9ad8\u6548\u7684\u6578\u64da\u6aa2\u7d22\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u95dc\u65bc\u6578\u64da\u5eab\u548c\u4f3a\u670d\u5668\u7684\u8cc7\u8a0a\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9 <a href=\"https:\/\/server.hk\">Server.HK<\/a>\uff0c\u6211\u5011\u63d0\u4f9b\u5404\u7a2e <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0c\u52a9\u60a8\u8f15\u9b06\u7ba1\u7406\u6578\u64da\u5eab\u548c\u61c9\u7528\u7a0b\u5f0f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22Qt\u6578\u64da\u5eab\u67e5\u8a62\u7684\u5feb\u901f\u9ad8\u6548\u6578\u64da\u6aa2\u7d22\u65b9\u6cd5\uff0c\u63d0\u5347\u61c9\u7528\u6027\u80fd\uff0c\u7c21\u5316\u6578\u64da\u7ba1\u7406\uff0c\u5be6\u73fe\u66f4\u6d41\u66a2\u7684\u7528\u6236\u9ad4\u9a57\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-97158","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/97158","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=97158"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/97158\/revisions"}],"predecessor-version":[{"id":97159,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/97158\/revisions\/97159"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=97158"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=97158"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=97158"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}