How to parse XML file using CParser class
Reviewer Approved
The following example shows how to parse XML file using Symbian OS C++ class, CParser. CParser is basically a SAX (Simple API for XML)-based XML parser.
It uses an active object to read the XML file chunk by chunk (see CXmlHandler::StartParsingWithAoL() method). On each chunk, it passes the buffer to the XML parser. When the XML parser finds an element, it calls the respective callback functions, for example CXmlHandler::OnStartElementL() or CXmlHandler::OnEndElementL().
To use CParser class, the XmlFramework.lib has to be included in the .mmp file. For more information about CParser, please visit some links at the end of this page.
Contents
[hide]
1 XmlHandler.h
2 XmlHandler.cpp
3 download example
4 See Also
[edit] XmlHandler.h
#ifndef __XMLHANDLER_H__
#define __XMLHANDLER_H__
// INCLUDE FILES
#include <e32base.h>
#include <f32file.h> //Link against efsrv.lib
#include <xml\contenthandler.h> // for MContentHandler
#include <xml\parser.h> // for CParser
// CLASS DECLARATION
using namespace Xml;
class CXmlHandler: public CActive, MContentHandler
{
public: // Constructors and destructor
static CXmlHandler* NewL();
static CXmlHandler* NewLC();
virtual ~CXmlHandler();
public: // Public methods
void StartParsingWithAoL( const TDesC& aFileName );
private: // Constructors
CXmlHandler();
void ConstructL();
private: // from CActive
void DoCancel();
void RunL();
private: // from MContentHandler
void OnStartDocumentL( const RDocumentParameters &aDocParam,
&n
Ïà¹ØÎĵµ£º
ÔÚÆ½Ê±¹¤×÷ÖУ¬ÄÑÃâ»áÓöµ½°ÑXML×÷ΪÊý¾Ý´æ´¢¸ñʽ¡£Ãæ¶ÔĿǰÖÖÀà·±¶àµÄ½â¾ö·½°¸£¬Äĸö×îÊʺÏÎÒÃÇÄØ£¿ÔÚÕâÆªÎÄÕÂÖУ¬ÎÒ¶ÔÕâËÄÖÖÖ÷Á÷·½°¸×öÒ»¸ö²»ÍêÈ«ÆÀ²â£¬½ö½öÕë¶Ô±éÀúXMLÕâ¿éÀ´²âÊÔ£¬ÒòΪ±éÀúXMLÊǹ¤×÷ÖÐʹÓÃ×î¶àµÄ(ÖÁÉÙÎÒÈÏΪ)¡£
¡¡¡¡Ô¤±¸
¡¡¡¡²âÊÔ»·¾³£º
¡¡¡¡AMD¶¾Áú1.4G OC 1.5G¡¢256M DDR333¡¢Windows2000 Server SP ......
½ñÌ칤×÷ÉÏÅöµ½Ò»¸öÎÊÌâ ÓÉÓÚÎÒÃǵÄÏîÄ¿Êý¾ÝÌ«ÉÙ ËùÒÔÐèÒª´Óweb searchÄDZ߽èµ÷Êý¾Ý£¬ËûÃÇÖ»¸øÎÒÃÇÌṩÁËÒ»¸öxmlµÄ½Ó¿Ú¡£Òò´Ë£¬ÎÒÃÇÐèÒª°ÑxmlµÄÊý¾Ýת»¯³Éhtml³ÊÏÖ¸ø´ó¼Ò¡£ÓÉÓÚÏîÄ¿ÊÇ»ùÓÚphpµÄ£¬ËùÒÔ¾ÍÞðÆúÁËÓÃjsÀ´¶ÁÈ¡xmlÑ¡ÔñÁ˼ÌÐøÊ¹ÓÃphp¡£²»¹ý£¬ÎÒÒÔǰ´ÓÀ´Ã»ÓÐ×ö¹ý´ËÀàµÄ³¢ÊÔ ËùÒÔÕÒÁ˺ܶàÍøÉÏ×ÊÁÏͬʱ²ÎÕÕÁËphpµÄ¹¤× ......
ÕâÊÇÒ»¸öÓÃJAVA W3C DOM ½øÐÐXML²Ù×÷µÄÀý×Ó£¬°üº¬Á˲éѯ¡¢Ôö¼Ó¡¢Ð޸ġ¢É¾³ý¡¢±£´æµÄ»ù±¾²Ù×÷¡£½ÏÍêÕûµÄÃèÊöÁËÒ»¸öXMLµÄÕû¸ö²Ù×÷Á÷³Ì¡£ÊʺϸÕÈëÃÅJAVA XML²Ù×÷µÄÅóÓѲο¼ºÍѧϰ¡£
¼ÙÉèÓÐXMLÎļþ£ºtest1.xml
<?xml version="1.0" encoding="UTF-8"?>
<books>
<book>
<name>¹þÀï²¨Ì ......
£¨µÚ1Õ£©
(P1~3)1£®ÓÃ×Ô¼ºµÄÓïÑÔ¶ÔSGML¡¢HTMLºÍXML×÷¼òµ¥½éÉܺͶԱȡ£
SGML ÊÇÒ»ÖÖ²ÉÓñê¼ÇÀ´ÃèÊöÎĵµÊý¾ÝµÄͨÓÃÓïÑÔ£¬SGML¶¨ÒåÁË»ù±¾µÄÓï·¨ºÃ£¬Í¬Ê±Ò²ÔÊÐíÓû§½¨Á¢×Ô¼ºµÄÔªËØ±ê¼Ç¡£
HTML ²ÉÓÃÁ˺ÜСһ²¿·ÖSGMLµÄ±ê¼Ç£¬Í¬Ê±HTML²ÉÓõÄÊǹ̶¨±ê¼ÇÒ²²»ÐèÒª°üº¬DTD¡£
XML ͬHTMLÒ»Ñù£¬¶¼Êdzö×ÔÓÚSGML±ê׼ͨÓñê¼ÇÓï ......