qt连接mysql配置文件

[Database]
ServerAddress=127.0.0.1
Port=3306
DatabaseName=mydatabase
Username=myuser
Password=mypassword

#include <QCoreApplication>
#include <QSqlDatabase>
#include <QSqlQuery>
#include <QSettings>

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);

    // 读取配置文件
    QSettings settings("config.ini", QSettings::IniFormat);
    QString serverAddress = settings.value("Database/ServerAddress").toString();
    int port = settings.value("Database/Port").toInt();
    QString databaseName = settings.value("Database/DatabaseName").toString();
    QString username = settings.value("Database/Username").toString();
    QString password = settings.value("Database/Password").toString();

    // 配置数据库连接
    QSqlDatabase db = QSqlDatabase::addDatabase("QMYSQL");
    db.setHostName(serverAddress);
    db.setPort(port);
    db.setDatabaseName(databaseName);
    db.setUserName(username);
    db.setPassword(password);

    // 打开数据库连接
    if (!db.open()) {
        qDebug() << "Error: connection with database failed";
        return -1;
    } else {
        qDebug() << "Database: connection ok";
    }

    // 执行查询
    QSqlQuery query;
    query.exec("SELECT * FROM mytable");
    while (query.next()) {
        qDebug() << query.value(0).toString();
    }

    return a.exec();
}