sql_new.rar_DEMO_QT_Qt数据库_qt sql_sqlite；数据库；

#include<QObject> #include<iostream> #include<QString> #include<QSqlQueryModel> #include<QTableView> #include<QSqlQuery> #include<QSqlDatabase> #include<QInputDialog> #include<QApplication> #include<QTextCodec> void creatDb(); void creatAll(); void insertAll(); int main(int argc,char *argv[]) { QApplication app(argc,argv); // QTextCodec::setCodecForTr(QTextCodec::codecForName("utf8")); creatDb(); //创建数据库 creatAll(); insertAll(); QString str = QString ("select * from AllFood"); QSqlQueryModel *model = new QSqlQueryModel; model ->setQuery(str); QTableView *view = new QTableView; view -> setModel(model); view ->show(); return app.exec(); } void creatDb()//创建数据库menu.db文件 { QSqlDatabase db = QSqlDatabase::addDatabase("QSQLITE"); db.setDatabaseName("menu.db"); if(!db.open()) { printf("sqlite is not open!\n"); return; } } void creatAll() { //如果已经存在了那么不会执性创建表,相当于不执行本条语句，不用去判断是否存在 QString name = "AllFood"; QSqlQuery query; QString str = QString("create table %1 (num,name,price)").arg(name); if( query.exec(str) )//如果存在了返回bool false;成功了返回bool ok; { std::cout<<"Success!"; fflush(stdout); } else { std::cout<<"Failure!"; fflush(stdout); } } void insertAll() { QSqlQuery query; query.exec(QObject::tr("insert into AllFood values(1,'凉拌山药',15)")); query.exec(QObject::tr("insert into AllFood values(2,'刀拍黄瓜',10)")); query.exec(QObject::tr("insert into AllFood values(3,'酱羊肉',20)")); query.exec(QObject::tr("insert into AllFood values(4,'靠大虾',30)")); query.exec(QObject::tr("insert into AllFood values(5,'凉拌千张',20)")); query.exec(QObject::tr("insert into AllFood values(6,'酸辣泡菜',10)")); query.exec(QObject::tr("insert into AllFood values(7,'韭菜皮蛋松',8)")); query.exec(QObject::tr("insert into AllFood values(8,'芝麻菠菜',10)")); query.exec(QObject::tr("insert into AllFood values(9,'司马怀府鸡',35)")); query.exec(QObject::tr("insert into AllFood values(10,'如意炒三丝',15)")); query.exec(QObject::tr("insert into AllFood values(11,'滋补人参鸡汤',50)")); query.exec(QObject::tr("insert into AllFood values(12,'玉米虾仁',25)")); query.exec(QObject::tr("insert into AllFood values(13,'什锦肉丁',30)")); query.exec(QObject::tr("insert into AllFood values(14,'东坡肉',33)")); query.exec(QObject::tr("insert into AllFood values(15,'紫苏茄子',20)")); query.exec(QObject::tr("insert into AllFood values(16,'软熘虾丁',35)")); query.exec(QObject::tr("insert into AllFood values(17,'饺子',20)")); query.exec(QObject::tr("insert into AllFood values(18,'香炸饭团',10)")); query.exec(QObject::tr("insert into AllFood values(19,'米饭',4)")); query.exec(QObject::tr("insert into AllFood values(20,'锅贴',14)")); query.exec(QObject::tr("insert into AllFood values(21,'比萨',25)")); query.exec(QObject::tr("insert into AllFood values(22,'汉堡包',7)")); query.exec(QObject::tr("insert into AllFood values(23,'豆沙锅饼',9)")); query.exec(QObject::tr("insert into AllFood values(24,'鲜肉小包',10)")); query.exec(QObject::tr("insert into AllFood values(25,'大麦茶',100)")); query.exec(QObject::tr("insert into AllFood values(26,'樱桃酒',101)")); query.exec(QObject::tr("insert into AllFood values(27,'黑花生酱',102)")); query.exec(QObject::tr("insert into AllFood values(28,'冰镇果子露',50)")); query.exec(QObject::tr("insert into AllFood values(29,'梅子酒',150)")); query.exec(QObject::tr("insert into AllFood values(30,'罗汉山楂茶',120)")); query.exec(QObject::tr("insert into AllFood values(31,'纯天然苹果醋',130)")); query.exec(QObject::tr("insert into AllFood values(32,'石榴汁',98)")); }