QSqlDatabase数据库

#include <QSqlDatabase>
#include <QtDebug>
#include <QSqlQuery>
#include <QSqlError>
#include <QSqlRecord>

//创建数据库
QSqlDatabase db = QSqlDatabase::addDatabase("QSQLITE", "sqlite1");
db.setHostName("acidalia");
db.setDatabaseName("customdb");
db.setUserName("root");
db.setPassword("123456");
if( !db.open())
{
   qDebug() << "db.open failed.";
}

//创建表
db = QSqlDatabase::database("sqlite1"); //建立数据库连接
QSqlQuery query(db);
bool success = query.exec("create table automobil(id int, name varchar)");
if(success)
{
    qDebug() << QObject::tr("create table success.");
}
else
{
    qDebug() << QObject::tr("create table failed.");
}

//插入记录
for(int i = 0; i < 10; i++)
{
    query.prepare("INSERT INTO automobil (id, name) "
                      "VALUES (:id, :name)");
    query.bindValue(":id", i);
    query.bindValue(":name", "furong");
    if(!query.exec())
    {
        QSqlError lastError = query.lastError();
        qDebug() << lastError.driverText() << QString(QObject::tr("INSERT failed."));
    }
}

//查询记录
query.exec("select * from automobil where id = '" + id + "'");
QSqlRecord rec = query.record();
qDebug() << QObject::tr("automobil table count:" ) << rec.count();
while(query.next())
{
    for(int i = 0; i < rec.count(); i++)
        qDebug() << query.value(i);
}

//更新记录
query.prepare(QString("update automobil set name = \"quange\",name = '" + name + "' where id = %1").arg(9));
if(!query.exec())
{
    QSqlError lastError = query.lastError();
    qDebug() << lastError.driverText() << QString(QObject::tr("update failed."));
}

//删除记录
query.prepare(QString("delete from automobil where id = %1").arg(2));
if(!query.exec())
{
    qDebug() << "delete failed.";
}

出现如下错误：

error: QSqlDatabase: No such file or directory 错误

解决办法：.pro工程文件中添加

QT += sql