一、 vs2013使用Xerces C++ SAX解析XML文档

1、下载Xerces 

链接：http://xerces.apache.org/xerces-c/download.cgi

由于下载的文件中没有动态链接库，需要我们手动进行编译

2. 编译动态链接库

使用工具cmake，使用方法参考之前博客

https://blog.csdn.net/z345436330/article/details/84888504

编译完成的动态链接库：

 

3. example

新建一个vscode工程，在工程中引入Xerces C++

a、C/C++ 常规中：附件包含目录：引入include ；头文件

b、链接器常规中：附件包含目录：引入lib；bin；文件

c、链接器输入中：附加依赖项：引入：xerces-c_3.lib

d、拷贝动态链接dll到项目目录下

// main.cpp
#include <xercesc/util/PlatformUtils.hpp>  
#include <xercesc/sax2/SAX2XMLReader.hpp>  
#include <xercesc/sax2/DefaultHandler.hpp>  
#include <xercesc/sax2/XMLReaderFactory.hpp>  
#include <xercesc/util/XMLString.hpp>  
#include <iostream>

#include "MySAXHandler.h"

using namespace std;
using namespace xercesc_3_2;


int main(int argc, char*  args[]) {
	try {
		XMLPlatformUtils::Initialize();
	}
	catch (const XMLException& toCatch) {
		char* message = XMLString::transcode(toCatch.getMessage());
		cout << "Error during initialization! :\n";
		cout << "Exception message is: \n"
			<< message << "\n";
		XMLString::release(&message);
		return 1;
	}

	char* xmlFile = "meta.xml";
	SAX2XMLReader* parser = XMLReaderFactory::createXMLReader();
	parser->setFeature(XMLUni::fgSAX2CoreValidation, true);
	parser->setFeature(XMLUni::fgSAX2CoreNameSpaces, true);   // optional  
	parser->setFeature(XMLUni::fgXercesDynamic, false);
	parser->setFeature(XMLUni::fgXercesSchema, true);
	parser->setFeature(XMLUni::fgXercesSchemaFullChecking, true);

	MySAX2Handler* defaultHandler = new MySAX2Handler();
	parser->setContentHandler(defaultHandler);
	parser->setErrorHandler(defaultHandler);
	parser->setEntityResolver(defaultHandler);

	try {
		parser->parse(xmlFile);
	}
	catch (const XMLException& toCatch) {
		char* message = XMLString::transcode(toCatch.getMessage());
		cout << "Exception message is: \n"
			<< message << "\n";
		XMLString::release(&message);
		return -1;
	}
	catch (const SAXParseException& toCatch) {
		char* message = XMLString::transcode(toCatch.getMessage());
		cout << "Exception message is: \n"
			<< message << "\n";
		XMLString::release(&message);
		return -1;
	}
	catch (...) {
		cout << "Unexpected Exception \n";
		return -1;
	}
	//defaultHandler->OutputPsList();
	delete parser;
	delete defaultHandler;
	XMLPlatformUtils::Terminate();
	system("PAUSE");
	return 0;
}

// MySAXHandler.h
#pragma once  
#include<xercesc/sax2/DefaultHandler.hpp>  
#include <xercesc/sax2/Attributes.hpp>
using namespace std;
using namespace xercesc_3_2;

XERCES_CPP_NAMESPACE_USE


class MySAX2Handler :public DefaultHandler
{
public:
	MySAX2Handler();
	~MySAX2Handler();
public:
	void startElement(
		const   XMLCh* const    uri,
		const   XMLCh* const    localname,
		const   XMLCh* const    qname,
		const   Attributes&     attrs
		);
	void characters(
		const   XMLCh* const    chars
		, const XMLSize_t       length
		);
	void endElement(
		const XMLCh* const uri,
		const XMLCh* const localname,
		const XMLCh* const qname
		);
	void fatalError(const SAXParseException&);
};

// MySAXHandler.cpp

#include "MySAXHandler.h"
#include <iostream>

using namespace std;

MySAX2Handler::MySAX2Handler()
{
}
MySAX2Handler::~MySAX2Handler() {
}

void MySAX2Handler::startElement(
	const   XMLCh* const    uri,
	const   XMLCh* const    localname,
	const   XMLCh* const    qname,
	const   Attributes&     attrs
	)
{
	char* message = XMLString::transcode(qname);
	cout << "I saw element: " << message << endl;
	XMLString::release(&message);
}

void MySAX2Handler::fatalError(const SAXParseException& exception)
{
	char* message = XMLString::transcode(exception.getMessage());
	cout << "Fatal Error: " << message
		<< " at line: " << exception.getLineNumber()
		<< endl;
	XMLString::release(&message);
}

void MySAX2Handler::characters(
	const   XMLCh* const    chars
	, const XMLSize_t       length
	) {
}

void MySAX2Handler::endElement(
	const XMLCh* const uri,
	const XMLCh* const localname,
	const XMLCh* const qname
	) {
}