{"id":173267,"date":"2024-11-07T16:34:48","date_gmt":"2024-11-07T08:34:48","guid":{"rendered":"https:\/\/server.hk\/cnblog\/173267\/"},"modified":"2024-11-07T16:34:49","modified_gmt":"2024-11-07T08:34:49","slug":"%e5%a6%82%e4%bd%95%e6%89%93%e9%96%8b%e4%bf%9d%e5%ad%98%e5%9c%a8%e6%96%87%e4%bb%b6%e4%b8%ad%e7%9a%84qt%e6%95%b8%e6%93%9a%e5%ba%ab%ef%bc%9f-qt%e6%95%b8%e6%93%9a%e5%ba%ab%e4%bf%9d%e5%ad%98%e5%88%b0","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/173267\/","title":{"rendered":"\u5982\u4f55\u6253\u958b\u4fdd\u5b58\u5728\u6587\u4ef6\u4e2d\u7684Qt\u6578\u64da\u5eab\uff1f (qt\u6578\u64da\u5eab\u4fdd\u5b58\u5230\u6587\u4ef6\u600e\u9ebc\u6253\u958b)"},"content":{"rendered":"<h1 id=\"%e5%a6%82%e4%bd%95%e6%89%93%e9%96%8b%e4%bf%9d%e5%ad%98%e5%9c%a8%e6%96%87%e4%bb%b6%e4%b8%ad%e7%9a%84qt%e6%95%b8%e6%93%9a%e5%ba%ab%ef%bc%9f-wWQaqLSgqK\">\u5982\u4f55\u6253\u958b\u4fdd\u5b58\u5728\u6587\u4ef6\u4e2d\u7684Qt\u6578\u64da\u5eab\uff1f<\/h1>\n<p>\u5728\u958b\u767c\u61c9\u7528\u7a0b\u5e8f\u6642\uff0c\u6578\u64da\u5eab\u7684\u4f7f\u7528\u662f\u4e0d\u53ef\u6216\u7f3a\u7684\u4e00\u90e8\u5206\u3002Qt\u4f5c\u70ba\u4e00\u500b\u5f37\u5927\u7684\u8de8\u5e73\u53f0\u61c9\u7528\u7a0b\u5e8f\u6846\u67b6\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u65b9\u5f0f\u4f86\u8655\u7406\u6578\u64da\u5eab\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u5982\u4f55\u6253\u958b\u4fdd\u5b58\u5728\u6587\u4ef6\u4e2d\u7684Qt\u6578\u64da\u5eab\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\u3002<\/p>\n<h2 id=\"qt%e6%95%b8%e6%93%9a%e5%ba%ab%e6%a6%82%e8%bf%b0-wWQaqLSgqK\">Qt\u6578\u64da\u5eab\u6982\u8ff0<\/h2>\n<p>Qt\u652f\u6301\u591a\u7a2e\u6578\u64da\u5eab\uff0c\u5305\u62ecSQLite\u3001MySQL\u3001PostgreSQL\u7b49\u3002\u5176\u4e2d\uff0cSQLite\u662f\u4e00\u7a2e\u8f15\u91cf\u7d1a\u7684\u6578\u64da\u5eab\uff0c\u5e38\u7528\u65bc\u5c0f\u578b\u61c9\u7528\u7a0b\u5e8f\u548c\u5d4c\u5165\u5f0f\u7cfb\u7d71\u3002SQLite\u6578\u64da\u5eab\u901a\u5e38\u4fdd\u5b58\u5728\u4e00\u500b\u6587\u4ef6\u4e2d\uff0c\u9019\u4f7f\u5f97\u5b83\u975e\u5e38\u9069\u5408\u7528\u65bc\u684c\u9762\u61c9\u7528\u7a0b\u5e8f\u548c\u79fb\u52d5\u61c9\u7528\u7a0b\u5e8f\u3002<\/p>\n<h2 id=\"%e6%89%93%e9%96%8bsqlite%e6%95%b8%e6%93%9a%e5%ba%ab%e6%96%87%e4%bb%b6-wWQaqLSgqK\">\u6253\u958bSQLite\u6578\u64da\u5eab\u6587\u4ef6<\/h2>\n<p>\u8981\u6253\u958b\u4fdd\u5b58\u5728\u6587\u4ef6\u4e2d\u7684SQLite\u6578\u64da\u5eab\uff0c\u9996\u5148\u9700\u8981\u78ba\u4fdd\u5df2\u7d93\u5b89\u88dd\u4e86Qt\u7684SQL\u6a21\u584a\u3002\u63a5\u4e0b\u4f86\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u6b65\u9a5f\u4f86\u6253\u958b\u6578\u64da\u5eab\uff1a<\/p>\n<h3 id=\"%e6%ad%a5%e9%a9%9f1%ef%bc%9a%e5%8c%85%e5%90%ab%e5%bf%85%e8%a6%81%e7%9a%84%e9%a0%ad%e6%96%87%e4%bb%b6-wWQaqLSgqK\">\u6b65\u9a5f1\uff1a\u5305\u542b\u5fc5\u8981\u7684\u982d\u6587\u4ef6<\/h3>\n<pre><code>#include &lt;QSqlDatabase&gt;\n#include &lt;QSqlError&gt;\n#include &lt;QSqlQuery&gt;\n#include &lt;QDebug&gt;\n<\/code><\/pre>\n<h3 id=\"%e6%ad%a5%e9%a9%9f2%ef%bc%9a%e5%89%b5%e5%bb%ba%e6%95%b8%e6%93%9a%e5%ba%ab%e9%80%a3%e6%8e%a5-wWQaqLSgqK\">\u6b65\u9a5f2\uff1a\u5275\u5efa\u6578\u64da\u5eab\u9023\u63a5<\/h3>\n<p>\u4f7f\u7528QSqlDatabase\u985e\u4f86\u5275\u5efa\u6578\u64da\u5eab\u9023\u63a5\u3002\u4ee5\u4e0b\u662f\u5275\u5efa\u548c\u6253\u958bSQLite\u6578\u64da\u5eab\u7684\u793a\u4f8b\u4ee3\u78bc\uff1a<\/p>\n<pre><code>QString dbPath = \"path\/to\/your\/database.db\"; \/\/ \u66ff\u63db\u70ba\u4f60\u7684\u6578\u64da\u5eab\u6587\u4ef6\u8def\u5f91\nQSqlDatabase db = QSqlDatabase::addDatabase(\"QSQLITE\");\ndb.setDatabaseName(dbPath);\n\nif (!db.open()) {\n    qDebug() &lt;&lt; \"\u7121\u6cd5\u6253\u958b\u6578\u64da\u5eab\uff1a\" &lt;&lt; db.lastError().text();\n} else {\n    qDebug() &lt;&lt; \"\u6578\u64da\u5eab\u6210\u529f\u6253\u958b\uff01\";\n}\n<\/code><\/pre>\n<h3 id=\"%e6%ad%a5%e9%a9%9f3%ef%bc%9a%e5%9f%b7%e8%a1%8c%e6%9f%a5%e8%a9%a2-wWQaqLSgqK\">\u6b65\u9a5f3\uff1a\u57f7\u884c\u67e5\u8a62<\/h3>\n<p>\u4e00\u65e6\u6578\u64da\u5eab\u6210\u529f\u6253\u958b\uff0c\u5c31\u53ef\u4ee5\u4f7f\u7528QSqlQuery\u985e\u4f86\u57f7\u884cSQL\u67e5\u8a62\u3002\u4ee5\u4e0b\u662f\u67e5\u8a62\u6578\u64da\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>QSqlQuery query(\"SELECT * FROM your_table_name\"); \/\/ \u66ff\u63db\u70ba\u4f60\u7684\u8868\u540d\n\nwhile (query.next()) {\n    QString data = query.value(0).toString(); \/\/ \u7372\u53d6\u7b2c\u4e00\u5217\u7684\u6578\u64da\n    qDebug() &lt;&lt; \"\u6578\u64da\uff1a\" &lt;&lt; data;\n}\n<\/code><\/pre>\n<h2 id=\"%e8%99%95%e7%90%86%e9%8c%af%e8%aa%a4-wWQaqLSgqK\">\u8655\u7406\u932f\u8aa4<\/h2>\n<p>\u5728\u64cd\u4f5c\u6578\u64da\u5eab\u6642\uff0c\u932f\u8aa4\u8655\u7406\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u4f7f\u7528QSqlError\u985e\u53ef\u4ee5\u7372\u53d6\u8a73\u7d30\u7684\u932f\u8aa4\u4fe1\u606f\u3002\u7576\u6578\u64da\u5eab\u7121\u6cd5\u6253\u958b\u6216\u67e5\u8a62\u5931\u6557\u6642\uff0c\u61c9\u8a72\u53ca\u6642\u8a18\u9304\u932f\u8aa4\u4fe1\u606f\u4ee5\u4fbf\u65bc\u8abf\u8a66\u3002<\/p>\n<pre><code>if (db.lastError().isValid()) {\n    qDebug() &lt;&lt; \"\u932f\u8aa4\u4fe1\u606f\uff1a\" &lt;&lt; db.lastError().text();\n}\n<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-wWQaqLSgqK\">\u7e3d\u7d50<\/h2>\n<p>\u5728\u672c\u6587\u4e2d\uff0c\u6211\u5011\u4ecb\u7d39\u4e86\u5982\u4f55\u6253\u958b\u4fdd\u5b58\u5728\u6587\u4ef6\u4e2d\u7684Qt\u6578\u64da\u5eab\uff0c\u7279\u5225\u662fSQLite\u6578\u64da\u5eab\u3002\u901a\u904e\u7c21\u55ae\u7684\u6b65\u9a5f\u548c\u4ee3\u78bc\u793a\u4f8b\uff0c\u60a8\u53ef\u4ee5\u8f15\u9b06\u5730\u5728Qt\u61c9\u7528\u7a0b\u5e8f\u4e2d\u96c6\u6210\u6578\u64da\u5eab\u529f\u80fd\u3002\u7121\u8ad6\u662f\u958b\u767c\u684c\u9762\u61c9\u7528\u7a0b\u5e8f\u9084\u662f\u79fb\u52d5\u61c9\u7528\u7a0b\u5e8f\uff0c\u638c\u63e1\u6578\u64da\u5eab\u7684\u4f7f\u7528\u90fd\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002<\/p>\n<p>\u5982\u679c\u60a8\u9700\u8981\u66f4\u591a\u6709\u95dc<em><a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a><\/em>\u548c<em><a href=\"https:\/\/server.hk\">\u96f2\u4f3a\u670d\u5668<\/a><\/em>\u7684\u8cc7\u8a0a\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u8a73\u7d30\u8cc7\u6599\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3\u5982\u4f55\u6253\u958b\u4fdd\u5b58\u5728\u6587\u4ef6\u4e2d\u7684Qt\u6578\u64da\u5eab\uff0c\u6b65\u9a5f\u7c21\u55ae\uff0c\u8f15\u9b06\u8a2a\u554f\u548c\u7ba1\u7406\u60a8\u7684\u6578\u64da\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-173267","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/173267","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=173267"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/173267\/revisions"}],"predecessor-version":[{"id":173268,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/173267\/revisions\/173268"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=173267"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=173267"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=173267"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}