Fedora11下QT4连接MYSQL出错处理QSqlDatabase: QMYSQL driver not loaded

MySql数据库服务器已打开

#include <QtCore/QCoreApplication>

#include <QtSql>
#include <QSqlDatabase>
#include <QSqlQuery>
#include <QString>
int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);
    //从MySql驱动程序中获取一个MySql数据库
    QSqlDatabase db = QSqlDatabase::addDatabase("QMYSQL");
    db.setHostName("localhost");//指字数据服务器名称
    db.setDatabaseName("test");//连接一个已存在的数据库
    db.setUserName("root");//设置登录名
    db.setPassword("");//设置登录密码          我的数据库密码为空，不知道怎么添加数据库的密码
    //打开数据库
    if(db.open())
    {
        qDebug()<<"database is establelished!";
    }
    else
    {
        qDebug()<<"build error!";
        return a.exec();
    }
    QSqlQuery query;//定义一个QSqlQuery类弄的变量
    //创建数据库表，并填充数据                                                                       student表在终端上已创建好
    //query.exec(QObject::tr("create table student(snovar char(10) not null primary key,sname varchar(20) not null,sclass varchar(10) not null)"));
    query.exec(QObject::tr("insert into student(sno,sname,sclass) value('2009002','lusy','0902')"));
    //执行数据库查询语句
    query.exec(QObject::tr("select * from student"));

    QSqlRecord rec=query.record();//返回查询语句执行的结果
    int count = rec.count();//获取查询到的记录的列数
    qDebug()<<"Number of coloumn:"<<count;
    //获取查询到的记录，并输出到控制台
    while(query.next())
    {
        rec=query.record();
        int snocol = rec.indexOf("sno");//返回该列的索引
        int snamecol=rec.indexOf("sname");
        int sclasscol=rec.indexOf("sclass");
        QString value1 = query.value(snocol).toString();//获取该殊数据值
        QString value2 = query.value(snamecol).toString();
        QString value3 = query.value(sclasscol).toString();
        qDebug()<<"sno:"<<value1<<"\t"<<"sname:"<<value2<<"\t"<<"sclass:"<<value3;
    }
    query.clear();//清空查询语句，并释放内存空间
    db.close();//关闭数据库连接
    return a.exec();
}


/*
 example4_1.pro文件中添加
QT       += core\
         sql

编译运行时出错
[root@localhost example4_1]# ./example4_1
QSqlDatabase: QMYSQL driver not loaded
QSqlDatabase: available drivers: QSQLITE QPSQL7 QPSQL
build error!

 先查下libqsqlmysql.so库的位置
[root@localhost example4_1]# locate libqsqlmysql.so
/usr/lib/qt4/plugins/sqldrivers/libqsqlmysql.so

把libqsqlmysql.so库复制到QT安装的驱动目录下
[root@localhost sqldrivers]# cp /usr/lib/qt4/plugins/sqldrivers/libqsqlmysql.so /opt/qtsdk-2010.04/qt/plugins/sqldrivers/
运行结果
[root@localhost example4_1]# ./example4_1
database is establelished!
Number of coloumn: 3
sno: "21109237"      sname: "yijun"      sclass: "201047"
sno: "2009001"      sname: "lilei"      sclass: "0901"
sno: "2009002"      sname: "lusy"      sclass: "0902"

*/