Qt MySQL驱动加载失败

1、连接MySQL数据库的代码如下：//输出可用数据库驱动qDebug()<<"available drivers:";QStringList drivers = QSqlDatabase::drivers();foreach(QString driver, drivers)qDebug()<<driver;//打开MySQLQSqlDatabase data_base = QSqlDatabase::addDatabase("QMYSQL");data_base.setHostName("localhost"); //设置主机地址data_base.setPort(3309); //设置端口data_base.setDatabaseName("db"); //设置数据库名称data_base.setUserName("root"); //设置用户名data_base.setPassword("password"); //设置密码if(!data_base.open())qDebug()<<"failed to connect to mysql";elseqDebug()<<"success";

2、但是提示加载失败。