rapidxml学习记录

一、资料

官网：http://rapidxml.sourceforge.net/
参考：
https://blog.csdn.net/wqvbjhc/article/details/7662931
http://blog.sina.com.cn/s/blog_9b0604b40101o6fm.html

二、需要修改代码

rapidxml_print.hpp在// Internal printing operations后添加声明

template<class OutIt, class Ch>
OutIt print_node(OutIt out, const xml_node<Ch> *node, int flags, int indent);    

template<class OutIt, class Ch>
OutIt print_element_node(OutIt out, const xml_node<Ch> *node, int flags, int indent);

template<class OutIt, class Ch>
 OutIt print_data_node(OutIt out, const xml_node<Ch> *node, int flags, int indent);

template<class OutIt, class Ch>
OutIt print_cdata_node(OutIt out, const xml_node<Ch> *node, int flags, int indent);

template<class OutIt, class Ch>
OutIt print_declaration_node(OutIt out, const xml_node<Ch> *node, int flags, int indent);

template<class OutIt, class Ch>
OutIt print_comment_node(OutIt out, const xml_node<Ch> *node, int flags, int indent);
	
template<class OutIt, class Ch>
OutIt print_doctype_node(OutIt out, const xml_node<Ch> *node, int flags, int indent);
	
template<class OutIt, class Ch>
 OutIt print_pi_node(OutIt out, const xml_node<Ch> *node, int flags, int indent);

---

main.cpp

#include <iostream>
#include <algorithm>
#include <string>
#include <vector>
#include <string>
#include <map>
#include <set>
#include <unordered_map>
#include <unordered_set>
#include <functional>
#include <memory>
#include <sstream>
using namespace std;

//下面三个文件是本段代码需要的库文件
#include "rapidxml/rapidxml.hpp"
#include "rapidxml/rapidxml_utils.hpp"
#include "rapidxml/rapidxml_print.hpp"
 

using namespace rapidxml;

int CreateXml();
int ReadAndChangeXml();
void DeleteNode();
void EditNode();
void PrintAllNode();
int main()
{
	CreateXml();
	//ReadAndChangeXml();
    //DeleteNode();
    //EditNode();
    PrintAllNode();
	cout << "hello" << endl;
	return 0;
}
//创建一个名称为config.xml文件
int CreateXml()
{
    xml_document<> doc;  
	xml_node<>* rot = doc.allocate_node(rapidxml::node_pi,doc.allocate_string("xml version='1.0' encoding='utf-8'"));
	doc.append_node(rot);
	xml_node<>* node =   doc.allocate_node(node_element,"config","information");  
	xml_node<>* color =   doc.allocate_node(node_element,"color",NULL);  
	doc.append_node(node);
	node->append_node(color);
	color->append_node(doc.allocate_node(node_element,"red","0.1"));
	color->append_node(doc.allocate_node(node_element,"green","0.1"));
	color->append_node(doc.allocate_node(node_element,"blue","0.1"));
	color->append_node(doc.allocate_node(node_element,"alpha","1.0"));
 
	xml_node<>* size =   doc.allocate_node(node_element,"size",NULL); 
	size->append_node(doc.allocate_node(node_element,"x","640"));
	size->append_node(doc.allocate_node(node_element,"y","480"));
	node->append_node(size);
 
	xml_node<>* mode = doc.allocate_node(rapidxml::node_element,"mode","screen mode");
	mode->append_attribute(doc.allocate_attribute("fullscreen","false"));//添加属性
	node->append_node(mode);
 
	std::string text;  
	rapidxml::print(std::back_inserter(text), doc, 0);  
 
	std::cout<<text<<std::endl; 
 
	std::ofstream out("config.xml");
	out << doc;
}

//读取并修改config.xml
int ReadAndChangeXml()
{
    file<> fdoc("config.xml");
    std::cout<<fdoc.data()<<std::endl;
    xml_document<>   doc;
    doc.parse<0>(fdoc.data());
 
    std::cout<<doc.name()<<std::endl;


     //! 获取根节点
     rapidxml::xml_node<>* root = doc.first_node();
    std::cout<<root->name()<<std::endl;
    //! 获取根节点第一个节点(没有利用first查找功能)
    rapidxml::xml_node<>* node1 = root->first_node();
    std::cout<<node1->name()<<std::endl;
    rapidxml::xml_node<>* node11 = node1->first_node();
    std::cout<<node11->name()<<std::endl;
    std::cout<<node11->value()<<std::endl;
    
     //! 在size结点下添加(利用first查找功能)
    xml_node<>* size = root->first_node("size");
    size->append_node(doc.allocate_node(node_element,"w","0"));
    size->append_node(doc.allocate_node(node_element,"h","0"));
 
    std::string text;
    rapidxml::print(std::back_inserter(text),doc,0);
 
    std::cout<<text<<std::endl;
 
    std::ofstream out("config.xml");
    out << doc;

}

void DeleteNode()
{
    file<> fdoc("config.xml");
    xml_document<>   doc;
    doc.parse<0>(fdoc.data());
 
    std::string text;  
	rapidxml::print(std::back_inserter(text), doc, 0);  
	std::cout<<text<<std::endl; 
 
	xml_node<>* root = doc.first_node();
 
	xml_node<>* sec = root->first_node();
 
	root->remove_node(sec); //移除根节点下的sec结点(包括该结点下所有结点)
	text="删除一个节点\r\n";  
	rapidxml::print(std::back_inserter(text), doc, 0);  
	std::cout<<text<<std::endl; 
 
	root->remove_all_nodes(); //移除根节点下所有结点
	text="删除所有节点\r\n";  
	rapidxml::print(std::back_inserter(text), doc, 0);  
	std::cout<<text<<std::endl; 

}

void EditNode()
{
    file<> fdoc("config.xml");
    xml_document<>   doc;
    doc.parse<0>(fdoc.data());
 
 
	xml_node<>* root = doc.first_node();
 
	xml_node<>* delnode = root->first_node("color");
	root->remove_node(delnode);//先删除color节点
    xml_node<>* lnode = root->first_node("size");//找到size节点
	xml_node<>* mynode=doc.allocate_node(node_element,"address","河北");
	root->insert_node(lnode,mynode);//添加address兄弟节点
 
	std::string text;  
	rapidxml::print(std::back_inserter(text), doc, 0);  
	std::cout<<text<<std::endl; 

}

void PrintAllNode()
{
    file<> fdoc("config.xml");
    xml_document<>   doc;
    doc.parse<0>(fdoc.data());
 
 
	xml_node<>* root = doc.first_node();

    //依次找到兄弟结点，若兄弟结点仍有子节点，则无法打印值，需递归
    for(rapidxml::xml_node<char> * node = root->first_node("color");node != NULL;node = node->next_sibling())
    {
        std::cout<<node->name() << ": " << node->value()<<std::endl;
    }

}

原型输出：

<?xml version='1.0' encoding='utf-8' ?>
<config>
	<color>
		<red>0.1</red>
		<green>0.1</green>
		<blue>0.1</blue>
		<alpha>1.0</alpha>
	</color>
	<size>
		<x>640</x>
		<y>480</y>
	</size>
	<mode fullscreen="false">screen mode</mode>
</config>