http://www.cnblogs.com/lgh1992314/p/3488342.html

建库

在VS下新建qt console appication

代码：

#include <iostream>
#include <Qtsql/QsqlDatabase>
#include <Qtsql/QsqlQuery>
#include <QtCore/QCoreApplication>
#include <QDebug>
#pragma comment(lib,"Qt5sql.lib")

int main(int argc,char *argv[])
{
	QCoreApplication a(argc,argv);
	QsqlDatabase db = QsqlDatabase::addDatabase("QsqlITE");
	db.setDatabaseName("user.db");
	db.open();
	QsqlQuery query;
	query.exec("select * from student");
	while(query.next())
	{
		int id = query.value(0).toInt();
		QString str = query.value(1).toString();
		qDebug() << id << "|" << str;
	}
	db.close();
	return a.exec();
}