聊聊QT添加MySQL驱动依赖的问题

#include <QCoreApplication>
#include <QSqlDatabase>
#include <QDebug>
#include <QStringList>
#include <QSqlQuery>
 
int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);
    // 输出可用数据库
    qDebug() << "Available drivers:";
    QStringList drivers = QSqlDatabase::drivers();
    foreach(QString driver, drivers)
        qDebug() << driver;
    return a.exec();
}

#include <QCoreApplication>
#include <QSqlDatabase>
#include <QDebug>
#include <QStringList>
#include <QSqlQuery>
int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);
    // 打开MySQL
    QSqlDatabase db = QSqlDatabase::addDatabase("QMYSQL");
    db.setHostName("localhost");
    db.setDatabaseName("test");
    db.setUserName("root");
    db.setPassword("YOUR DATABASE PASSWORD");
    if (!db.open())
        qDebug() << "Failed to connect to root mysql admin";
    else qDebug() << "open";
    QSqlQuery query(db);
    //注意这里varchar一定要指定长度，不然会出错
    query.exec("create table student(id int primary key,name varchar(20))");
    query.exec("insert into student values(1,'xiaogang')");
    query.exec("insert into student values(2,'xiaoming')");
    query.exec("insert into student values(3,'xiaohong')");
    query.exec("select id,name from student where id >= 1");
    while(query.next())
    {
        int value0 = query.value(0).toInt();
        QString value1 = query.value(1).toString();
        qDebug() << value0 << value1 ;
    }
    return a.exec();
}