rapidxml 文件读写、增加、删除、编辑节点

来源：互联网发布：win7 数据恢复编辑：程序博客网时间：2024/06/06 01:31
本文旨在提供RapidXml文件读写操作，以及对节点的增加、删除、编译提供一个Demo。测试的代码如下：
#include <tchar.h>#include <string>#include <iostream>#include "rapidxml/rapidxml.hpp"#include "rapidxml/rapidxml_utils.hpp"//rapidxml::file#include "rapidxml/rapidxml_print.hpp"//rapidxml::printusing namespace rapidxml;//void WriteFile1(){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<>* config = doc.allocate_node(node_element, "config","information");doc.append_node(config);xml_node<>* color = doc.allocate_node(node_element, "color",NULL);color->append_node(doc.allocate_node(node_element, "red", "88"));color->append_node(doc.allocate_node(node_element, "green", "108"));color->append_node(doc.allocate_node(node_element, "blue", "128"));color->append_node(doc.allocate_node(node_element, "alpha", "255"));config->append_node(color);xml_node<>* size = doc.allocate_node(node_element, "size", NULL);size->append_node(doc.allocate_node(node_element, "x", "1024"));size->append_node(doc.allocate_node(node_element, "y", "768"));config->append_node(size);xml_node<>* mode = doc.allocate_node(rapidxml::node_element, "mode", "screen mode");mode->append_attribute(doc.allocate_attribute("fullscreen", "false"));config->append_node(mode);//打印整个XML内容std::string text;rapidxml::print(std::back_inserter(text), doc, 0);std::cout << text << std::endl;//写入文件std::ofstream out("write_file1.xml");out << doc;out.close();/*<?xml version="1.0" encoding="utf-8" ?><config><color><red>88</red><green>108</green><blue>128</blue><alpha>255</alpha></color><size><x>1024</x><y>768</y></size><mode fullscreen="false">screen mode</mode></config>*/}//void WriteFile2(){xml_document<> doc;char strbuf[] = /*"<?xml version=\'1.0\' encoding=\'utf-8\' ?>"*/"<root>""<Devices>""<Monitor>LG</Monitor>""<MotherBoard>Gigabyte</MotherBoard>""<MemoryBar>Kingston</MemoryBar>""<Graphics>MSI</Graphics>""<Hardisk>WD</Hardisk>""</Devices>""<job>""<name>CSDN</name>""<website>http://blog.csdn.net/hellokandy</website>""<addr>Guangzhou China</addr>""</job>""</root>";doc.parse<0>( strbuf );//打印整个XML内容std::string text;rapidxml::print(std::back_inserter(text), doc, 0);std::cout << text << std::endl;//写入文件std::ofstream out("write_file2.xml");//ofstream默认时,如果文件存在则覆盖原来的内容,不存在则新建out << doc;out.close();}//void ModifyFile(){//file<> fdoc("write_file2.xml");xml_document<> doc;doc.parse<0>(fdoc.data());std::string text;rapidxml::print(std::back_inserter(text), doc, 0);//doc内容输出到text尾处std::cout << text << std::endl;xml_node<>* root = doc.first_node();xml_node<>* Devices = root->first_node();//xml_node<>* job = root->first_node("job");//移除根节点下的Devices结点下的MotherBoard节点xml_node<>* MotherBoard = Devices->first_node("MotherBoard");Devices->remove_node(MotherBoard);//text = "移除根节点下的Devices结点下的MotherBoard节点\r\n";rapidxml::print(std::back_inserter(text), doc, 0);std::cout << text << std::endl;//在Devices的Graphics节点处插入一个KeyBorad节点xml_node<>* Graphics = Devices->first_node("Graphics");//找到Graphics节点xml_node<>* new_node = doc.allocate_node(node_element, "KeyBorad", "Logitech");new_node->append_attribute(doc.allocate_attribute("Interface", "USB"));Devices->insert_node(Graphics, new_node);text = "在Devices下面插入一个KeyBorad节点\r\n";rapidxml::print(std::back_inserter(text), doc, 0);std::cout << text << std::endl;//移除根节点下的Devices结点(包括该结点下所有结点)root->remove_node(Devices);text = "移除根节点下的Devices结点(包括该结点下所有结点)\r\n";rapidxml::print(std::back_inserter(text), doc, 0);std::cout << text << std::endl;//移除根节点下所有结点root->remove_all_nodes();text = "移除根节点下所有结点\r\n";rapidxml::print(std::back_inserter(text), doc, 0);std::cout << text << std::endl;//写入文件std::ofstream out("write_file2_delete.xml");out << doc;out.close();}//int _tmain(int argc, _TCHAR* argv[]){//WriteFile1();//WriteFile2();//ModifyFile();system("pause");return 0;}
值得一提的是：RapidXml是没有提供编辑节点的，但可以通过先删除节点，然后再插入的方式来解决
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