g ++在linux下编译rapidxml 使用与过程中出现的问题解决[通俗易懂]

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共四个文件需要引用

#include "rapidxml.hpp"
#include "rapidxml_utils.hpp"
#include "rapidxml_print.hpp"
#include "rapidxml_iterators.hpp"

1：修改rapidxml_iterators.hpp文件第20 和 102 行

// typedef typename xml_node<Ch> value_type;
// typedef typename xml_node<Ch> &reference;
// typedef typename xml_node<Ch> *pointer;
// typedef std::ptrdiff_t difference_type;
// typedef std::bidirectional_iterator_tag iterator_category;

为下面的内容

typedef xml_node<Ch> value_type;
typedef xml_node<Ch> &reference;
typedef xml_node<Ch> *pointer;
typedef typename std::ptrdiff_t difference_type;
typedef typename std::bidirectional_iterator_tag iterator_category;

// typedef typename xml_attribute<Ch> value_type;
// typedef typename xml_attribute<Ch> &reference;
// typedef typename xml_attribute<Ch> *pointer;
// typedef std::ptrdiff_t difference_type;
// typedef std::bidirectional_iterator_tag iterator_category;
为下面的内容
typedef xml_node<Ch> value_type;
typedef xml_node<Ch> &reference;
typedef xml_node<Ch> *pointer;
typedef typename std::ptrdiff_t difference_type;
typedef typename std::bidirectional_iterator_tag iterator_category;

2：rapidxml_print.hpp 文件在文件的:124行处插入如下代码

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

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

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

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

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

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

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

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

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

g ++在linux下编译rapidxml 使用与过程中出现的问题解决[通俗易懂]

更改完毕即可使用了

1.写文件

#include <iostream>
#include "../rapidxml/rapidxml.hpp"
#include "../rapidxml/rapidxml_utils.hpp"
#include "../rapidxml/rapidxml_print.hpp"
#include "../rapidxml/rapidxml_iterators.hpp"

 
using namespace rapidxml;
 
int main()
{    
	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);  
	//建议使用如下方法，否则临时变量的指针出了作用域，容易造成xml节点问题
	//std::string s = "color";
	//char* pname = doc.allocate_string(s.c_str());
	//doc.allocate_node(node_element,pname,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"));
	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;
 
	system("PAUSE");
	return EXIT_SUCCESS;
}

2.读文件：

#include <iostream>
#include "../rapidxml/rapidxml.hpp"
#include "../rapidxml/rapidxml_utils.hpp"
#include "../rapidxml/rapidxml_print.hpp"
#include "../rapidxml/rapidxml_iterators.hpp"
using namespace rapidxml;

int main()
{
    file<> fdoc("config.xml");
    std::cout << fdoc.data() << std::endl;
    xml_document<> doc;
    doc.parse<parse_full>(fdoc.data());

    std::cout << doc.name() << std::endl;

    //! 获取根节点
    xml_node<> *root = doc.first_node("config");
    std::cout << root->name() << std::endl;

    //! 获取根节点第一个节点
    xml_node<> *node1 = root->first_node();
    std::cout << node1->name() << std::endl;

    xml_node<> *node11 = node1->first_node();
    std::cout << node11->name() << std::endl;
    std::cout << node11->value() << std::endl;

    //! 修改之后再次保存
    xml_node<> *size = root->first_node("size");

    // rapidxml::xml_attribute<>* nameAttr = child->first_attribute("name");

    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;

    system("PAUSE");
    return EXIT_SUCCESS;
}

运行结果 config.xml

<?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>
       <w>0</w>
       <h>0</h>
   </size>
   <mode fullscreen=”false”>screen mode</mode>
</config>

3.读xml 格式数据

#include <iostream>
#include "../rapidxml/rapidxml.hpp"
#include "../rapidxml/rapidxml_utils.hpp"
#include "../rapidxml/rapidxml_print.hpp"
#include "../rapidxml/rapidxml_iterators.hpp"

using namespace rapidxml;

void readFile(char *strc)
{
    rapidxml::xml_document<> doc;
    doc.parse<0>(strc);
    //获取根节点 
    rapidxml::xml_node<> *root = doc.first_node("Package");
    int nSize = 0;

    std::cout << "config=" << root->name() << std::endl;

    // rapidxml::xml_node<> *child = root->first_node("LtdInfo")->first_node(); //找到 LtdInfo 节点

    // std::cout << "LtdInfo=" << child->name() << std::endl;
    // std::cout << "LtdInfo=" << child->value() << std::endl;

    for (rapidxml::xml_node<> *child = root->first_node("LtdInfo")->first_node(); child; child = child->next_sibling())
    {

        std::cout << "" << child->name() << ":=" << child->value() << std::endl;
       
    }

    for (rapidxml::xml_node<> *child = root->first_node("Data")->first_node(); child; child = child->next_sibling())
    {

        std::cout << "" << child->name() << ":=" << child->value() << std::endl;
       
    }

    strc = NULL;
}

int main()
{  
    char strbuf[] =     

        "<Package>"
        "<LtdInfo>"
        "<Code>[41574100001454]</Code>"
        "<Pwd>[111111]</Pwd>"
        "<Class>[N010]</Class>"
        "<Flag>[20220408210546445]</Flag>"
        "</LtdInfo>"
        "<Data>"
        "<Name>[Datatype,DateTime,millisecond,Data]</Name>"
        "<Value>[0,2022-04-08 21:05:46,445,21.6,20.3,18.6,17.6,16.7,16.6,15.6,14.4,14.2,14.2,12.5,10.6,8.8,9.3,8.2,6.3,7.1,4.6,4.9,3.9,0.1,11.8,1.4,-0.8,-1.7,-0.7,13.8,-1.5,-2.6,-0.8,-4.3,-2.1,-2.5,1.9]</Value>"
        "</Data>"
        "</Package>";
    readFile(strbuf);
}

g ++在linux下编译rapidxml 使用与过程中出现的问题解决[通俗易懂]