首先说明参考了网络上的一个常规的代码，但实际使用中遇到不少的问题，先把常规使用方式粘贴如下：

#include <QtCore/QCoreApplication>  
#include <Qtsql> 
#include <QTextCodec> 
int main(int argc,char *argv[])
{      
    QCoreApplication a(argc,argv);     
    QTextCodec::setCodecForTr(QTextCodec::codecForLocale());       
    QsqlDatabase dbconn=QsqlDatabase::addDatabase("QsqlITE");    //添加数据库驱动        
    dbconn.setDatabaseName("mytest.db");  //在工程目录新建一个mytest.db的文件        
    if(!dbconn.open())    
    {            
        qDebug()<<"fdsfds";       
    }       
    QsqlQuery query;//以下执行相关QSL语句       
    query.exec("create table student(id varchar,name varchar)");    //新建student表，id设置为主键，还有一个name项       
    query.exec(QObject::tr("insert into student values(1,'aaa')"));        
    query.exec(QObject::tr("insert into student values(2,'bbb')"));        
    query.exec(QObject::tr("insert into student values(3,'ccc')"));         
    query.exec(QObject::tr("insert into student values(3,'ddd')"));         
    query.exec(QObject::tr("insert into student values(4,'eee')"));         
    query.exec(QObject::tr("insert into student values(5,'fff')"));         
    query.exec(QObject::tr("insert into student values(6,'ggg')"));        
    query.exec(QObject::tr("select id,name from student where id>=1"));         
    query.exec("select id,name from student where id>=1");         
    while(query.next())//query.next()指向查找到的第一条记录，然后每次后移一条记录    
    {              
        int ele0=query.value(0).toInt();//query.value(0)是id的值，将其转换为int型                     
        QString ele1=query.value(1).toString();                     
        qDebug()<<ele0<<ele1;//输出两个值    
    }      
    query.exec(QObject::tr("drop student"));       
    return a.exec();  
}