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 
    
 @H_403_24@#ifndefXML_READER_H
 @H_403_24@#defineXML_READER_H
 @H_403_24@#include<QtCore>
 @H_403_24@//#include<QtGui>
 @H_403_24@classxml_reader:publicQXmlStreamReader
 @H_403_24@{
 @H_403_24@//Q_OBJECT
 @H_403_24@public:
 @H_403_24@xml_reader();
 @H_403_24@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();
 @H_403_24@};
 @H_403_24@#endif//XML_READER_H

xml_reader.cpp

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403

#include"xml_reader.h"

@H_403_24@xml_reader::xml_reader()
@H_403_24@{}
boolxml_reader::read(QIODevice*device)
@H_403_24@{
@H_403_24@setDevice(device);
while(!atEnd())
@H_403_24@readNext();
if(isStartElement())
if(name()=="data")
@H_403_24@read_data();
@H_403_24@}
@H_403_24@}
return!error();
voidxml_reader::read_data()
@H_403_24@qDebug()<<"Starttoreaddata...";
if(name()=="period")
@H_403_24@read_period();
if(name()=="startweek")
@H_403_24@read_startweek();
if(name()=="eventnumber")
@H_403_24@read_eventnumber();
if(isEndElement())
if(name()=="data")
@H_403_24@qDebug()<<"Nowattheendofdataelement...";
break;
voidxml_reader::read_startweek()
@H_403_24@qDebug()<<"startweekis:"<<readElementText();
voidxml_reader::read_eventnumber()
@H_403_24@qDebug()<<"eventNumberis:"<<readElementText();
voidxml_reader::read_period()
@H_403_24@qDebug()<<"Starttoreadperiod...";
while(!atEnd())
@H_403_24@readNext();
if(isStartElement())
if(name()=="id")
@H_403_24@read_id();
if(name()=="starttime")
@H_403_24@read_starttime();
if(name()=="endtime")
@H_403_24@read_endtime();
if(name()=="exception")
@H_403_24@read_exception();
if(name()=="duration")
@H_403_24@read_duration();
if(name()=="event")
@H_403_24@read_event();
if(isEndElement())
@H_403_24@qDebug()<<"Nowattheendofperiod...";
break;
voidxml_reader::read_id()
@H_403_24@qDebug()<<"idis:"<<readElementText();
voidxml_reader::read_starttime()
@H_403_24@qDebug()<<"starttimeis:"<<readElementText();
voidxml_reader::read_endtime()
@H_403_24@qDebug()<<"endtimeis:"<<readElementText();
voidxml_reader::read_exception()
@H_403_24@qDebug()<<"Starttoreadexception...";
if(name()=="subexception")
@H_403_24@read_subexception();
@H_403_24@qDebug()<<"Nowattheendofexception...";
voidxml_reader::read_subexception()
@H_403_24@qDebug()<<"Starttoreadsubexception...";
if(name()=="description")
@H_403_24@read_description();
@H_403_24@qDebug()<<"Nowattheendofsubexception...";
voidxml_reader::read_description()
@H_403_24@qDebug()<<"descriptionis:"<<readElementText();
voidxml_reader::read_duration()
@H_403_24@qDebug()<<"durationis:"<<readElementText();
voidxml_reader::read_event()
@H_403_24@qDebug()<<"Starttoreadevent...";
if(name()=="id")
@H_403_24@read_id();
if(name()=="offsettime")
@H_403_24@read_offsettime();
if(name()=="eventdesc")
@H_403_24@read_eventdesc();
if(name()=="lasthandle")
@H_403_24@read_lasthandle();
@H_403_24@qDebug()<<"Nowattheendofevent..";
voidxml_reader::read_offsettime()
@H_403_24@qDebug()<<"offsettimeis:"<<readElementText();
voidxml_reader::read_eventdesc()
@H_403_24@qDebug()<<"Starttoreadeventdesc...";
if(name()=="eventname")
@H_403_24@read_eventname();
if(name()=="prompt")
@H_403_24@read_prompt();
@H_403_24@qDebug()<<"Nowattheendofeventdesc...";
voidxml_reader::read_eventname()
@H_403_24@qDebug()<<"eventnameis:"<<readElementText();
voidxml_reader::read_prompt()
@H_403_24@qDebug()<<"promptis:"<<readElementText();
voidxml_reader::read_lasthandle()
@H_403_24@qDebug()<<"lasthandleis:"<<readElementText();
@H_403_24@}

QT中使用QXmlStreamReader解析XML文件

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