XML语法文件解析工具TinyXML2

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本篇记录C++解析XML文件，TinyXML2支持解析XML语法的文件，不限于以.XML结尾的文件。
代码来自官方文档地址：http://www.grinninglizard.com/tinyxml2docs/pages.html

  1. 环境：VS2013，win10
  2. tinyxml2安装：下载VS插件NuGet（程序包管理工具），并安装（安装完之后要重启VS），新建一个控制台项目，创建成功后，在项目名称上右键，有一个选项“管理NuGet程序包”，点击，选择联机——>All，右上角搜索tinyxml2，选择TinyXML-2安装。
  3. 代码说明：
    • 解析的xml来源可以是文件或者是字符串，两种解析方法都写了。
    • 属性值有两种表示方式，xml标签属性和子标签。两种解析方法都写了。
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#include"tinyxml2.h"
#include<iostream>

using namespace std;
using namespace tinyxml2;

int main()
{
	XMLDocument doc;
	//Parse an XML from char buffer
	//Get information out of XML
	static const char* xml =
		"<?xml version=\"1.0\"?>"
		"<!DOCTYPE PLAY SYSTEM \"play.dtd\">"
		"<PLAY>"
		"<TITLE>A Midsummer Night's Dream</TITLE>"
		"</PLAY>";
	doc.Parse(xml);
	XMLElement* titleElement = doc.FirstChildElement("PLAY")->FirstChildElement("TITLE");
	const char* title = titleElement->GetText();
	printf("Name of play (1):%s\n",title);//输出Name of play (1):A Midsummer Night's Dream

	//Read attributes and text information.	
	//way 1
	xml="<?xml version=\"1.0\"?>"
		"<!DOCTYPE PLAY SYSTEM \"play.dtd\">"
		"<PLAY>"
		"<TITLE>A Midsummer Night's <b>Dream</b></TITLE>"
		"</PLAY>";
	doc.Parse(xml);
	XMLText* textNode = titleElement->FirstChild()->ToText();
	title = textNode->Value();
	printf("Name of play (2): %s\n", title);//输出Name of play (2): A Midsummer Night's

	//way 2
	xml ="<information>"
		"   <attributeApproach v='2' />"
		"   <textApproach>"
		"       <v>-2</v>"
		"   </textApproach>"
		"</information>";
	doc.Parse(xml);
	int v0=-1;
	XMLElement* attributeApproachElement = doc.FirstChildElement()->FirstChildElement("attributeApproach");
	attributeApproachElement->QueryAttribute("v", &v0);
	printf("v0=%d\n", v0);//输出v0=2
	int v1 = -1;
	XMLElement* textApproachElement = doc.FirstChildElement()->FirstChildElement("textApproach");
	textApproachElement->FirstChildElement("v")->QueryIntText(&v1);
	printf("v1=%d\n", v1);//输出v1=-2

	//load xml file and get information out of xml file
	doc.LoadFile("test.xml");
	titleElement = NULL;
	title = NULL;
	titleElement = doc.FirstChildElement("PLAY")->FirstChildElement("TITLE");
	title = titleElement->GetText();
	printf("Name of play (1):%s\n", title);//输出Name of play (1):A Midsummer Night's Dream
}

test.xml文件如下

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<?xml version="1.0"?>
<PLAY>
  <TITLE>A Midsummer Night's Dream</TITLE>
</PLAY>

结果显示如下：
result

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