QT中使用QXmlStreamReader解析XML文件

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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。

xml_reader.h

[cpp]view plaincopy 
    
 #ifndefXML_READER_H
 #defineXML_READER_H
 #include<QtCore>
 //#include<QtGui>
 classxml_reader:publicQXmlStreamReader
 {
 //Q_OBJECT
 public:
 xml_reader();
 boolread(QIODevice*device);
private:
voidread_data();
voidread_startweek();
voidread_eventnumber();
voidread_period();
voidread_id();
voidread_starttime();
voidread_endtime();
voidread_exception();
voidread_subexception();
voidread_description();
voidread_duration();
voidread_event();
voidread_offsettime();
voidread_eventdesc();
voidread_eventname();
voidread_prompt();
voidread_lasthandle();
voidread_unknow();
 };
 #endif//XML_READER_H

xml_reader.cpp

copy 
     
    

#include"xml_reader.h"

xml_reader::xml_reader()
{}
boolxml_reader::read(QIODevice*device)
{
setDevice(device);
while(!atEnd())
readNext();
if(isStartElement())
if(name()=="data")
read_data();
}
}
return!error();
voidxml_reader::read_data()
qDebug()<<"Starttoreaddata...";
if(name()=="period")
read_period();
if(name()=="startweek")
read_startweek();
if(name()=="eventnumber")
read_eventnumber();
if(isEndElement())
if(name()=="data")
qDebug()<<"Nowattheendofdataelement...";
break;
voidxml_reader::read_startweek()
qDebug()<<"startweekis:"<<readElementText();
voidxml_reader::read_eventnumber()
qDebug()<<"eventNumberis:"<<readElementText();
voidxml_reader::read_period()
qDebug()<<"Starttoreadperiod...";
while(!atEnd())
readNext();
if(isStartElement())
if(name()=="id")
read_id();
if(name()=="starttime")
read_starttime();
if(name()=="endtime")
read_endtime();
if(name()=="exception")
read_exception();
if(name()=="duration")
read_duration();
if(name()=="event")
read_event();
if(isEndElement())
qDebug()<<"Nowattheendofperiod...";
break;
voidxml_reader::read_id()
qDebug()<<"idis:"<<readElementText();
voidxml_reader::read_starttime()
qDebug()<<"starttimeis:"<<readElementText();
voidxml_reader::read_endtime()
qDebug()<<"endtimeis:"<<readElementText();
voidxml_reader::read_exception()
qDebug()<<"Starttoreadexception...";
if(name()=="subexception")
read_subexception();
qDebug()<<"Nowattheendofexception...";
voidxml_reader::read_subexception()
qDebug()<<"Starttoreadsubexception...";
if(name()=="description")
read_description();
qDebug()<<"Nowattheendofsubexception...";
voidxml_reader::read_description()
qDebug()<<"descriptionis:"<<readElementText();
voidxml_reader::read_duration()
qDebug()<<"durationis:"<<readElementText();
voidxml_reader::read_event()
qDebug()<<"Starttoreadevent...";
if(name()=="id")
read_id();
if(name()=="offsettime")
read_offsettime();
if(name()=="eventdesc")
read_eventdesc();
if(name()=="lasthandle")
read_lasthandle();
qDebug()<<"Nowattheendofevent..";
voidxml_reader::read_offsettime()
qDebug()<<"offsettimeis:"<<readElementText();
voidxml_reader::read_eventdesc()
qDebug()<<"Starttoreadeventdesc...";
if(name()=="eventname")
read_eventname();
if(name()=="prompt")
read_prompt();
qDebug()<<"Nowattheendofeventdesc...";
voidxml_reader::read_eventname()
qDebug()<<"eventnameis:"<<readElementText();
voidxml_reader::read_prompt()
qDebug()<<"promptis:"<<readElementText();
voidxml_reader::read_lasthandle()
qDebug()<<"lasthandleis:"<<readElementText();
}

QT中使用QXmlStreamReader解析XML文件

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