Qt创建数据库、插入内容

//创建数据库

     QSqlDatabase db=QSqlDatabase::addDatabase ("QSQLITE");

       hostName = config.getDatabaseHost();

       databaseName = config.getDatabaseName();

       userName = config.getDatabaseUsername();

        password = config.getDatabasePassword();

        db.setHostName (hostName);

       db.setDatabaseName (databaseName);

       db.setUserName (userName);

       db.setPassword (password);

       db.open ();

       QSqlQuery query;

       bool success=query.exec("create table AGVmessage(Num int primary key,ipaddress varchar)");

      if(success)

          qDebug()<<QObject::tr ("数据库表创建成功\n");

      else

qDebug()<<QObject::tr ("数据库创建失败\n");

 //插入到数据库中

        QSqlQuery query;

        query.prepare("insert into AGVMessage(Num,ipaddress)values(:Num,:ipaddress)");

        query.bindValue(":Num",click);

        query.bindValue (":ipaddress",ipAddress);

         bool ni= query.exec();

         if(!ni)

         {

             QSqlError lastError=query.lastError ();

             qDebug()< ()<<QString(QObject::tr ("插入失败\n"));

         }

         else

         {

             qDebug()<<QObject::tr ("插入成功\n");

         }