QT中使用QXmlStreamReader解析XML文件

XML文件由于其扩展性与兼容性的优点，被广泛用作软件和系统的配置文件。这里简要介绍一下QT下如何来解析XML文件。
源代码：
xml_reader.h
#ifndef XML_READER_H
#define XML_READER_H
#include <QtCore>
//#include <QtGui>
class xml_reader : public QXmlStreamReader
{
//Q_OBJECT
public:
xml_reader();
bool read(QIODevice *device);
private:
void read_data();
void read_startweek();
void read_eventnumber();
void read_period();
void read_id();
void read_starttime();
void read_endtime();
void read_exception();
void read_subexception();
void read_description();
void read_duration();
void read_event();
void read_offsettime();
void read_eventdesc();
void read_eventname();
void read_prompt();
void read_lasthandle();
void read_unknow();
};
#endif // XML_READER_H
 
xml_reader.cpp
#include "xml_reader.h"
xml_reader::xml_reader()
{}
bool xml_reader::read(QIODevice *device)
{
setDevice(device);
while(!atEnd())
{
readNext();
if(isStartElement())
{
if(name() == "data")
{
read_data();
}
}
}
return !error();
}
void xml_reader::read_data()
{
qDebug()<<"Start to read data...";
while(!atEnd())
{
readNext();
if(isStartElement())
{
if(name() == "period")
{
read_period();
}
if(name() == "startweek")
{
read_startweek();
}
if(name() == "eventnumber")
{
read_eventnumber();
}
}
if(isEndElement())
{
if(name() == "data")
{
qDebug()<<"Now at the end of data element...";
break;
}
}
}
}
void xml_reader::read_startweek()
{