- TinyXml2 库使用方法
下载地址 https://github.com/leethomason/tinyxml2
使用 git 下载
（1）下载 tinyxml2
git clone https://github.com/leethomason/tinyxml2.git
（2）进入相应目录并编译
cd tinyxml2/ cmake . make
（3）测试该版本的准确性
./xmltest
（4）安装
sudo make install
可以看到安装的路径
没有 fail 则说明正常。
注意：也可以直接在工程引入 tinyxml2.h 和 tinyxml2.cpp 即可。
TinyXML2 是简单实用的开源的 C++XML 文件解析库，可以很方便的应用到现有的项 目之中。 TinyXML2 解析器相对 TinyXML1 在代码上是完全重写，使其更适合于游戏开发 中使用。它使用更少的内存，更快，并使用更少的内存分配。
由于 XML 的树状结构，TinyXML2 将 XML 的节点抽象为 XMLNode，XML 中除了把属 性 key-value 抽象为 XMLAttribute 类型外，其余的都看作 XMLNode 的子类，首先将整个 XML 文档抽象为 XMLDocument，将声明部分抽象为 XMLDeclaration，将注释抽象为 XMLComment，将元素抽象为 XMLElement，将文本抽象为 XMLText。
2.3 节点 元素 属性 值的关系
XMLAttribute 是解析 XML 的属性的类，XML 中的属性都与 XML 的 Element 绑定，并且为 key-value 类型。
XMLComment 主要是处理 XML 注释的类，注释的存储形式为""。
XMLDeclaration 主要是处理 XML 中声明的类，声明的存储形式为"<? declaration ?>"。 XMLDocument 代表 XML 整个实体，TinyXML2 中只有 XMLDocument 类可以被实例化，其他的类必
须通过 XMLDocument 提供的 new 方法进行实例化，而不能直接实例化。XMLNode
的其他实体类把构造函数定义为 protected，不能被外部实例化，这样保证使用 XMLDocument 进行内存的管理，避免产生内存泄漏的风险。
XMLElement XMLElement 类是 XMLNode 中最重要的一个类，其存储方式有<foo/>和<foo></foo> 两 种 形 式 ， 它 包 含 了 一 个 XMLAttribute 的 根 指 针 ， 这 个 root 指 针 指 向 XMLAttribute 的第一个属性键值对。
XMLHandle 主要用来访问元素。
XMLNode 是几乎 XML 所有元素(XMLAttribute 除外)的基类，XML 本质是一种树形结构，而 整个 XML 就是由许多的节点(XMLNode)组成，在 TinyXML2 中每个 XMLNode 节点都 保存了父亲、前驱、后继、孩子头节点和孩子尾节点信息，便于查询、插入、检 索。
XMLPrinter 是 XMLVisitor 类的子类，主要实现的写 XML 的功能，其提供了两种书写方式，一 是构建 XMLDocument，二是直接 push 字段。
XMLText 主要是处理 XML 文本的类，文本信息又分为 CDATA 和普通文本。CDATA 是有专属的 开始字符"<
#include <iostream>
#include "tinyxml2.h"int main(void)
{tinyxml2::XMLDocument doc;// 本地文件读取tinyxml2::XMLError ret = doc.LoadFile("local_xml.xml");std::cout << doc.ErrorID() << std::endl;std::cout << ret << std::endl;// 加载到内存tinyxml2::XMLPrinter printer;doc.Print(&printer); // 打印到内存std::cout << printer.CStr() << std::endl;std::cout << "size: " << printer.CStrSize() << std::endl;std::cout << "size: " << strlen(printer.CStr()) + 1 << std::endl;return 0;
}
#include <iostream>
#include "tinyxml2.h"int main(void)
{const char *xml = "<?xml version=\"1.0\" encoding=\"UTF-8\"?> \<note> \<to>beijing</to> \<from>shenzhen</from> \<heading>Reminder</heading> \<body>Don't forget the meeting!</body> \</note>";tinyxml2::XMLDocument doc;doc.Parse(xml);std::cout << doc.ErrorID() << std::endl;// 1. 第一种刷新到本地FILE *fp = fopen("memory_1.xml", "wb");tinyxml2::XMLPrinter printer(fp);doc.Print(&printer); // 打印到文件，则.CStr()就返回空值了std::cout << "xml:" << printer.CStr() << std::endl;fclose(fp);// 2. 第二种刷新到本地doc.SaveFile("memory_2.xml");return 0;
}
#include <iostream>
#include "tinyxml2.h"
#include <stdio.h>
#include <stdlib.h>using namespace tinyxml2;/*
enum XMLError {XML_SUCCESS = 0,XML_NO_ATTRIBUTE,XML_WRONG_ATTRIBUTE_TYPE,XML_ERROR_FILE_NOT_FOUND,XML_ERROR_FILE_COULD_NOT_BE_OPENED,XML_ERROR_FILE_READ_ERROR,XML_ERROR_PARSING_ELEMENT,XML_ERROR_PARSING_ATTRIBUTE,XML_ERROR_PARSING_TEXT,XML_ERROR_PARSING_CDATA,XML_ERROR_PARSING_COMMENT,XML_ERROR_PARSING_DECLARATION,XML_ERROR_PARSING_UNKNOWN,XML_ERROR_EMPTY_DOCUMENT,XML_ERROR_MISMATCHED_ELEMENT,XML_ERROR_PARSING,XML_CAN_NOT_CONVERT_TEXT,XML_NO_TEXT_NODE,XML_ELEMENT_DEPTH_EXCEEDED,XML_ERROR_COUNT
};
*///创建XML文件
int createXML(const char* xmlPath)
{XMLDocument doc;if (XML_ERROR_FILE_NOT_FOUND != doc.LoadFile(xmlPath)) {std::cout << "file has been existed !" << std::endl;return 0;}//添加声明 <?xml version="1.0" encoding="UTF-8" ?>XMLDeclaration *declaration = doc.NewDeclaration();doc.InsertFirstChild(declaration);XMLElement *root = doc.NewElement("Users");doc.InsertEndChild(root);XMLElement *userNode = doc.NewElement("User");//添加属性userNode->SetAttribute("Name", "milo");userNode->SetAttribute("Password", "pwd");root->InsertEndChild(userNode);return doc.SaveFile(xmlPath);
}void loadXML(const char* xmlPath) {XMLDocument doc;if (doc.LoadFile(xmlPath) != XML_SUCCESS) {std::cout << "load xlm file failed" << std::endl;return;}XMLPrinter printer;doc.Print( &printer);std::cout << printer.CStr();
}//添加性别，号码，邮箱 再添加一个用户
int addXML1(const char* xmlPath) {XMLDocument doc;if (doc.LoadFile(xmlPath) != XML_SUCCESS) {std::cout << "load xlm file failed" << std::endl;return -1;}XMLElement *root = doc.RootElement();XMLElement *userNode = root->FirstChildElement("User");XMLElement *gender = doc.NewElement("Gender");XMLText* genderText = doc.NewText("man");gender->InsertFirstChild(genderText);userNode->InsertFirstChild(gender);XMLElement *mobile = doc.NewElement("Mobile");mobile->InsertFirstChild(doc.NewText("186****3143"));userNode->InsertEndChild(mobile);XMLElement *email = doc.NewElement("Email");email->InsertFirstChild(doc.NewText("472251823@qq.com"));userNode->InsertEndChild(email);XMLElement *userNode2 = doc.NewElement("User");userNode2->SetAttribute("Name", "king");userNode2->SetAttribute("Password", "pwd2");root->InsertEndChild(userNode2);XMLElement *mobile2 = doc.NewElement("Mobile");mobile2->InsertFirstChild(doc.NewText("186****3143"));userNode2->InsertEndChild(mobile2);return doc.SaveFile(xmlPath);
}//在性别后面添加年龄，再添加一个号码
int addXML2(const char* xmlPath)
{XMLDocument doc;if (doc.LoadFile(xmlPath) != XML_SUCCESS){std::cout<<"load xml file failed"<<std::endl;return false;}XMLElement* root=doc.RootElement();XMLElement* userNode=root->FirstChildElement("User");XMLElement* gender = userNode->FirstChildElement("Gender");XMLElement* age = doc.NewElement("Age");age->InsertFirstChild(doc.NewText("18"));userNode->InsertAfterChild(gender,age);XMLElement* mobile = userNode->FirstChildElement("Mobile");mobile->SetAttribute("Location","home");XMLElement* mobile1 = doc.NewElement("Mobile");mobile1->SetAttribute("Location","company");mobile1->InsertFirstChild(doc.NewText("186****3143"));userNode->InsertAfterChild(mobile, mobile1);return doc.SaveFile(xmlPath);
}//删除第一个号码，删除第二个号码的属性
int deleteXML(const char* xmlPath) {XMLDocument doc;if (doc.LoadFile(xmlPath) != XML_SUCCESS) {std::cout << "load xlm file failed" << std::endl;return -1;}XMLElement *root = doc.RootElement();XMLElement *userNode = root->FirstChildElement("User");XMLElement *mobile = userNode->FirstChildElement("Mobile");userNode->DeleteChild(mobile);XMLElement *mobile2 = userNode->FirstChildElement("Mobile");mobile2->DeleteAttribute("Location");return doc.SaveFile(xmlPath);
}//将milo的年龄改为10000岁，将king的号码改为8888结尾
int updateXML(const char* xmlPath) {XMLDocument doc;if (doc.LoadFile(xmlPath) != XML_SUCCESS) {std::cout << "load xlm file failed" << std::endl;return -1;}XMLElement *root = doc.RootElement();XMLElement *userNode = root->FirstChildElement("User");while (userNode != NULL) {if (0 == strncmp("milo", (userNode->Attribute("Name")), 11)) {userNode->FirstChildElement("Age")->SetText("10000");userNode = userNode->NextSiblingElement();} else if (0 == strncmp("king", (userNode->Attribute("Name")), 11)) {userNode->FirstChildElement("Mobile")->SetText("186****8888");userNode = userNode->NextSiblingElement();} else {userNode = userNode->NextSiblingElement();}}return doc.SaveFile(xmlPath);
}//将milo的信息打印出来
int selectXML(const char* xmlPath)
{XMLDocument doc;if(doc.LoadFile(xmlPath)!=XML_SUCCESS){std::cout<<"load xml file failed"<<std::endl;return false;}XMLElement* root=doc.RootElement();XMLElement* userNode=root->FirstChildElement("User");while(userNode != NULL){if( 0 == strncmp("milo",(userNode->Attribute("Name")),11)){std::cout << userNode->Attribute("Name") << std::endl;std::cout << userNode->Attribute("Password") << std::endl;std::cout << userNode->FirstChildElement("Age")->GetText() << std::endl;std::cout << userNode->FirstChildElement("Gender")->GetText() << std::endl;std::cout << userNode->FirstChildElement("Mobile")->GetText() << std::endl;std::cout << userNode->FirstChildElement("Email")->GetText() << std::endl;userNode = userNode->NextSiblingElement();} else {userNode = userNode->NextSiblingElement();}}return 0;
}int main( int argc, const char ** argv )
{char xmlPath[] = "./0voice.xml";/*创建*/createXML(xmlPath);loadXML(xmlPath);printf("------------------------------\n");/*增*/addXML1(xmlPath);loadXML(xmlPath);printf("------------------------------\n");addXML2(xmlPath);loadXML(xmlPath);printf("------------------------------\n");/*删*/deleteXML(xmlPath);loadXML(xmlPath);printf("------------------------------\n");/*改*/updateXML(xmlPath);loadXML(xmlPath);printf("------------------------------\n");/*查*/selectXML(xmlPath);return 0;
}
#include <iostream>
#include "tinyxml2.h"#define CHECK_TINYXML2_RESULT(ret) \do \{ \if (ret != tinyxml2::XML_SUCCESS) \{ \std::cout << __FUNCTION__ << "(" << __LINE__ << ") failed, ret = " << ret << std::endl; \return -1; \} \} while (0)/*** @brief: 写相机属性. 产生完了之后将所有节点挂在p下面* @param p 某个相机节点* @param doc 所有的元素属性以及值均在doc的下面* @param ipAddr IP地址* @return: 返回说明* @retval: 返回值说明*/
static void WriteOneCameraAttibute(tinyxml2::XMLElement *p, tinyxml2::XMLDocument &doc,const char *ipAddr)
{const char *subnetMask = "123.45.67.89";tinyxml2::XMLElement *pDevID = doc.NewElement("DevID");tinyxml2::XMLText *pDevIdText = doc.NewText("5");pDevID->InsertEndChild(pDevIdText);p->InsertEndChild(pDevID);tinyxml2::XMLElement *pIpAddr = doc.NewElement("IpAddress");tinyxml2::XMLText *pIpAddrText = doc.NewText(ipAddr);pIpAddr->InsertEndChild(pIpAddrText);p->InsertEndChild(pIpAddr);tinyxml2::XMLElement *pSubnetMask = doc.NewElement("SubnetMask");tinyxml2::XMLText *pSubnetMaskText = doc.NewText(subnetMask);pSubnetMask->InsertEndChild(pSubnetMaskText);p->InsertEndChild(pSubnetMask);tinyxml2::XMLElement *pExposureAuto = doc.NewElement("ExposureAuto");tinyxml2::XMLText *pExposureAutoText = doc.NewText("false");pExposureAuto->InsertEndChild(pExposureAutoText);p->InsertEndChild(pExposureAuto);tinyxml2::XMLElement *pExposureTime = doc.NewElement("ExposureTime");tinyxml2::XMLText *pExposureTimeText = doc.NewText("200");pExposureTime->InsertEndChild(pExposureTimeText);p->InsertEndChild(pExposureTime);tinyxml2::XMLElement *pTriggerMode = doc.NewElement("TriggerMode");tinyxml2::XMLText *pTriggerModeText = doc.NewText("false");pTriggerMode->InsertEndChild(pTriggerModeText);p->InsertEndChild(pTriggerMode);
}
/*** @brief: 将数据写到某个xml文件中* @param path xml文件路径* @return: 返回说明* @retval: 返回值说明*/
static int WriteParam(const std::string &path)
{tinyxml2::XMLError ret;tinyxml2::XMLDocument doc;const char *declaration = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>";ret = doc.Parse(declaration);CHECK_TINYXML2_RESULT(ret);tinyxml2::XMLElement *pFirst = doc.NewElement("CameraI");pFirst->SetAttribute("type", "home");pFirst->SetAttribute("price", 1000);pFirst->SetAttribute("wifi", true);// 内部插内容WriteOneCameraAttibute(pFirst, doc, "1.22.32.82");doc.InsertEndChild(pFirst);tinyxml2::XMLElement *pSecond = doc.NewElement("CameraII");// 内部插内容WriteOneCameraAttibute(pSecond, doc, "2.22.32.82");doc.InsertEndChild(pSecond);tinyxml2::XMLElement *pThree = doc.NewElement("CameraIII");// 内部插内容WriteOneCameraAttibute(pThree, doc, "3.22.32.82");doc.InsertEndChild(pThree);ret = doc.SaveFile(path.c_str());return 0;
}/*** @brief: 读取每个相机的属性* @param p 相机节点指针* @return: 返回说明* @retval: 返回值说明*/
static void ReadOneCameraAttribute(const tinyxml2::XMLElement *p)
{int devIdContent = p->FirstChildElement("DevID")->IntText();const char *ipAddrContent = p->FirstChildElement("IpAddress")->GetText();const char *subnetMaskContent = p->FirstChildElement("SubnetMask")->GetText();const char *exposureAutoContent = p->FirstChildElement("ExposureAuto")->GetText();int64_t exposureTimeContent = p->FirstChildElement("ExposureTime")->Int64Text();bool triggerModeContent = p->FirstChildElement("TriggerMode")->BoolText();std::cout << "devIdContent(int):\t" << devIdContent << std::endl;std::cout << "ipAddrContent:\t" << ipAddrContent << std::endl;std::cout << "subnetMaskContent:\t" << subnetMaskContent << std::endl;std::cout << "exposureAutoContent:\t" << exposureAutoContent << std::endl;std::cout << "exposureTimeContent(int64_t):\t" << exposureTimeContent << std::endl;std::cout << "triggerModeContent(bool):\t" << ((triggerModeContent == true) ? "true" : "false") << std::endl;
}/*** @brief: 读取解析某路径的xml文件* @param path xml文件路径* @return: 返回说明* @retval: 返回值说明*/
static int ReadParam(const std::string &path)
{// 导入文件错误, 退出tinyxml2::XMLDocument doc;tinyxml2::XMLError error = doc.LoadFile(path.c_str());CHECK_TINYXML2_RESULT(error);tinyxml2::XMLElement *pFirst = doc.FirstChildElement("CameraI"); //doc.RootElement();// 等同tinyxml2::XMLElement *pSecond = doc.FirstChildElement("CameraII");tinyxml2::XMLElement *pThree = doc.FirstChildElement("CameraIII");// 分别读取每个相机的各个属性ReadOneCameraAttribute(pFirst);std::cout << "------------------\n";ReadOneCameraAttribute(pSecond);std::cout << "------------------\n";ReadOneCameraAttribute(pThree);std::cout << "------------------\n";return 0;
}/*** @brief: 修改相机属性* @param p 相机节点指针* @return: 返回说明* @retval: 返回值说明*/
static void ModifyOneCamera(tinyxml2::XMLElement *p)
{int devId = 4;const char *ipAddr = "139.66.38.13";const char *subnetMask = "255.0.0.0";bool exposureAuto = false;int64_t exposureTime = 80;bool triggerMode = false;p->FirstChildElement("DevID")->SetText(devId);p->FirstChildElement("IpAddress")->SetText(ipAddr);p->FirstChildElement("SubnetMask")->SetText(subnetMask);p->FirstChildElement("ExposureAuto")->SetText(exposureAuto);p->FirstChildElement("ExposureTime")->SetText(exposureTime);p->FirstChildElement("TriggerMode")->SetText(triggerMode);
}/*** @brief: 修改某xml文件的参数* @param path xml文件路径* @return: 返回说明* @retval: 返回值说明*/
static void ModifyParam(const std::string &path)
{// 导入文件错误, 退出tinyxml2::XMLDocument doc;tinyxml2::XMLError error = doc.LoadFile(path.c_str());if (error != tinyxml2::XMLError::XML_SUCCESS)return;// 三个相机指针tinyxml2::XMLElement *pFirst = doc.FirstChildElement("CameraI");tinyxml2::XMLElement *pSecond = doc.FirstChildElement("CameraII");tinyxml2::XMLElement *pThree = doc.FirstChildElement("CameraIII");// 修改ModifyOneCamera(pFirst);ModifyOneCamera(pSecond);ModifyOneCamera(pThree);doc.SaveFile(path.c_str());
}void testCameraXML()
{std::string path = "camera_info_2.xml";std::cout << "---------------生成一个xml文件------------------" << std::endl;WriteParam(path);std::cout << "--------------写文件结束，读取生成的xml文件------------------" << std::endl;ReadParam(path);std::cout << "--------------读文件结束，修改文件开始------------------" << std::endl;ModifyParam(path);std::cout << "--------------修改文件结束，读取修改的xml文件------------------" << std::endl;ReadParam(path);
}int main(void)
{testCameraXML();return 0;
}
#include <iostream>
#include "tinyxml2.h"#define CHECK_TINYXML2_RESULT(ret) \do \{ \if (ret != tinyxml2::XML_SUCCESS) \{ \std::cout << __FUNCTION__ << "(" << __LINE__ << ") failed, ret = " << ret << std::endl; \return -1; \} \} while (0)typedef struct cameraInfo
{int id;std::string type;std::string ipAddr;std::string subnetMask;bool exposureAuto;int64_t exposureTime;bool triggerMode;float price;
} CAMERA_INFO_T;/*** @brief: 写入类型1 Camera的测试信息* @param p * @param doc * @return: 返回说明* @retval: 返回值说明*/
static void WriteCameraI(tinyxml2::XMLElement *p, tinyxml2::XMLDocument &doc)
{const char *ipAddr = "178.26.85.83";const char *subnetMask = "123.45.67.89";// 1. 创建一个CameraItinyxml2::XMLElement *cameraI_1 = doc.NewElement("CameraI");// 2. 封装CameraI// 写入属性cameraI_1->SetAttribute("type", "home");cameraI_1->SetAttribute("id", 5);// 写入IP地址tinyxml2::XMLElement *pIpAddr = doc.NewElement("IpAddress");tinyxml2::XMLText *pIpAddrText = doc.NewText(ipAddr);pIpAddr->InsertEndChild(pIpAddrText);cameraI_1->InsertEndChild(pIpAddr);// 写入子网掩码tinyxml2::XMLElement *pSubnetMask = doc.NewElement("SubnetMask");tinyxml2::XMLText *pSubnetMaskText = doc.NewText(subnetMask);pSubnetMask->InsertEndChild(pSubnetMaskText);cameraI_1->InsertEndChild(pSubnetMask);// 写入是否自动曝光tinyxml2::XMLElement *pExposureAuto = doc.NewElement("ExposureAuto");tinyxml2::XMLText *pExposureAutoText = doc.NewText("false");pExposureAuto->InsertEndChild(pExposureAutoText);cameraI_1->InsertEndChild(pExposureAuto);// 写入曝光时长tinyxml2::XMLElement *pExposureTime = doc.NewElement("ExposureTime");tinyxml2::XMLText *pExposureTimeText = doc.NewText("200");pExposureTime->InsertEndChild(pExposureTimeText);cameraI_1->InsertEndChild(pExposureTime);// 写入触发模式tinyxml2::XMLElement *pTriggerMode = doc.NewElement("TriggerMode");tinyxml2::XMLText *pTriggerModeText = doc.NewText("false");pTriggerMode->InsertEndChild(pTriggerModeText);cameraI_1->InsertEndChild(pTriggerMode);// 写入价格tinyxml2::XMLElement *pPrice = doc.NewElement("Price");tinyxml2::XMLText *pPriceText = doc.NewText("9.9");pPrice->InsertEndChild(pPriceText);cameraI_1->InsertEndChild(pPrice);// 3. 将一个CameraI插入到CameraConfigp->InsertEndChild(cameraI_1);// 1. 创建一个CameraItinyxml2::XMLElement *cameraI_2 = doc.NewElement("CameraI");// 2. 封装CameraI// 写入属性cameraI_2->SetAttribute("type", "company");cameraI_2->SetAttribute("id", 6);// 写入IP地址pIpAddr = doc.NewElement("IpAddress");pIpAddrText = doc.NewText(ipAddr);pIpAddr->InsertEndChild(pIpAddrText);cameraI_2->InsertEndChild(pIpAddr);// 写入子网掩码pSubnetMask = doc.NewElement("SubnetMask");pSubnetMaskText = doc.NewText(subnetMask);pSubnetMask->InsertEndChild(pSubnetMaskText);cameraI_2->InsertEndChild(pSubnetMask);// 写入是否自动曝光pExposureAuto = doc.NewElement("ExposureAuto");pExposureAutoText = doc.NewText("false");pExposureAuto->InsertEndChild(pExposureAutoText);cameraI_2->InsertEndChild(pExposureAuto);// 写入曝光时长pExposureTime = doc.NewElement("ExposureTime");pExposureTimeText = doc.NewText("200");pExposureTime->InsertEndChild(pExposureTimeText);cameraI_2->InsertEndChild(pExposureTime);// 写入触发模式pTriggerMode = doc.NewElement("TriggerMode");pTriggerModeText = doc.NewText("false");pTriggerMode->InsertEndChild(pTriggerModeText);cameraI_2->InsertEndChild(pTriggerMode);// 写入价格// 3. 将一个CameraI插入到CameraConfigp->InsertEndChild(cameraI_2);
}/*** @brief: 写入类型2 Camera的测试信息* @param p * @param doc * @return: 返回说明* @retval: 返回值说明*/
static void WriteCameraII(tinyxml2::XMLElement *p, tinyxml2::XMLDocument &doc)
{const char *ipAddr = "2.26.85.83";const char *subnetMask = "123.45.67.89";// 1. 创建一个CameraIItinyxml2::XMLElement *cameraII_1 = doc.NewElement("CameraII");// 2. 封装CameraII// 写入设备IDtinyxml2::XMLElement *pDevID = doc.NewElement("DevID");tinyxml2::XMLText *pDevIdText = doc.NewText("7");pDevID->InsertEndChild(pDevIdText);cameraII_1->InsertEndChild(pDevID);// 写入IP地址tinyxml2::XMLElement *pIpAddr = doc.NewElement("IpAddress");tinyxml2::XMLText *pIpAddrText = doc.NewText(ipAddr);pIpAddr->InsertEndChild(pIpAddrText);cameraII_1->InsertEndChild(pIpAddr);// 写入子网掩码tinyxml2::XMLElement *pSubnetMask = doc.NewElement("SubnetMask");tinyxml2::XMLText *pSubnetMaskText = doc.NewText(subnetMask);pSubnetMask->InsertEndChild(pSubnetMaskText);cameraII_1->InsertEndChild(pSubnetMask);// 写入是否自动曝光tinyxml2::XMLElement *pExposureAuto = doc.NewElement("ExposureAuto");tinyxml2::XMLText *pExposureAutoText = doc.NewText("false");pExposureAuto->InsertEndChild(pExposureAutoText);cameraII_1->InsertEndChild(pExposureAuto);// 写入曝光时长tinyxml2::XMLElement *pExposureTime = doc.NewElement("ExposureTime");tinyxml2::XMLText *pExposureTimeText = doc.NewText("200");pExposureTime->InsertEndChild(pExposureTimeText);cameraII_1->InsertEndChild(pExposureTime);// 写入触发模式tinyxml2::XMLElement *pTriggerMode = doc.NewElement("TriggerMode");tinyxml2::XMLText *pTriggerModeText = doc.NewText("false");pTriggerMode->InsertEndChild(pTriggerModeText);cameraII_1->InsertEndChild(pTriggerMode);// 写入价格tinyxml2::XMLElement *pPrice = doc.NewElement("Price");tinyxml2::XMLText *pPriceText = doc.NewText("9.9");pPrice->InsertEndChild(pPriceText);cameraII_1->InsertEndChild(pPrice);// 3. 将一个CameraI插入到CameraConfigp->InsertEndChild(cameraII_1);// 1. 创建一个CameraIItinyxml2::XMLElement *cameraII_2 = doc.NewElement("CameraII");// 2. 封装CameraII// 写入设备IDpDevID = doc.NewElement("DevID");pDevIdText = doc.NewText("8");pDevID->InsertEndChild(pDevIdText);cameraII_2->InsertEndChild(pDevID);// 写入IP地址pIpAddr = doc.NewElement("IpAddress");pIpAddrText = doc.NewText(ipAddr);pIpAddr->InsertEndChild(pIpAddrText);cameraII_2->InsertEndChild(pIpAddr);// 写入子网掩码pSubnetMask = doc.NewElement("SubnetMask");pSubnetMaskText = doc.NewText(subnetMask);pSubnetMask->InsertEndChild(pSubnetMaskText);cameraII_2->InsertEndChild(pSubnetMask);// 写入是否自动曝光pExposureAuto = doc.NewElement("ExposureAuto");pExposureAutoText = doc.NewText("false");pExposureAuto->InsertEndChild(pExposureAutoText);cameraII_2->InsertEndChild(pExposureAuto);// 写入曝光时长pExposureTime = doc.NewElement("ExposureTime");pExposureTimeText = doc.NewText("400");pExposureTime->InsertEndChild(pExposureTimeText);cameraII_2->InsertEndChild(pExposureTime);// 写入触发模式pTriggerMode = doc.NewElement("TriggerMode");pTriggerModeText = doc.NewText("false");pTriggerMode->InsertEndChild(pTriggerModeText);cameraII_2->InsertEndChild(pTriggerMode);// 写入价格// 3. 将一个CameraI插入到CameraConfigp->InsertEndChild(cameraII_2);
}
/*** @brief: 写入类型Camera的测试信息* @param path 路径* @return: 返回说明* @retval: 返回值说明*/
static int WriteXML(const std::string &path)
{tinyxml2::XMLError ret;tinyxml2::XMLDocument doc;const char *declaration = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>";ret = doc.Parse(declaration);CHECK_TINYXML2_RESULT(ret);tinyxml2::XMLElement *root = doc.NewElement("CameraConfig");root->SetAttribute("version", "1.0");WriteCameraI(root, doc);WriteCameraII(root, doc);doc.InsertEndChild(root); // InsertEndChild 添加节点ret = doc.SaveFile(path.c_str());CHECK_TINYXML2_RESULT(ret);return 0;
}/*** @brief: 读取一个camera信息* @param {type} 形参 参数说明* @return: 返回说明* @retval: 返回值说明*/
static void ReadOneCameraXML(const tinyxml2::XMLElement *p)
{std::cout << "Model:" << p->Name() << std::endl;const tinyxml2::XMLAttribute *type = p->FindAttribute("type");if (type){std::cout << "camera type:\t" << type->Value() << std::endl;}const tinyxml2::XMLAttribute *id = p->FindAttribute("id");if (id){std::cout << "camera id:\t" << id->IntValue() << std::endl;}const tinyxml2::XMLElement *devId = p->FirstChildElement("DevID");if (devId) // 判断某个元素是否存在{int devIdContent = devId->IntText();std::cout << "devIdContent(int):\t" << devIdContent << std::endl;}const char *ipAddrContent = p->FirstChildElement("IpAddress")->GetText();const char *subnetMaskContent = p->FirstChildElement("SubnetMask")->GetText();const char *exposureAutoContent = p->FirstChildElement("ExposureAuto")->GetText();int64_t exposureTimeContent = p->FirstChildElement("ExposureTime")->Int64Text();bool triggerModeContent = p->FirstChildElement("TriggerMode")->BoolText();std::cout << "ipAddrContent:\t" << ipAddrContent << std::endl;std::cout << "subnetMaskContent:\t" << subnetMaskContent << std::endl;std::cout << "exposureAutoContent:\t" << exposureAutoContent << std::endl;std::cout << "exposureTimeContent(int64_t):\t" << exposureTimeContent << std::endl;std::cout << "triggerModeContent(bool):\t" << ((triggerModeContent == true) ? "true" : "false") << std::endl;const tinyxml2::XMLElement *pPrice = p->FirstChildElement("Price");if (pPrice) // 判断某个元素是否存在{std::cout << "price(float):\t" << pPrice->FloatText() << std::endl;}
}
/*** @brief: 遍历XML* @param path 本地文件路径* @return: 返回说明* @retval: 返回值说明*/
static int ParseXML(const std::string &path)
{std::cout << "ParseXML into" << std::endl;tinyxml2::XMLDocument doc;tinyxml2::XMLError error = doc.LoadFile(path.c_str());CHECK_TINYXML2_RESULT(error); // 如果错误则退出std::cout << "ParseXML:" << std::endl;tinyxml2::XMLElement *root = doc.RootElement();tinyxml2::XMLElement *element = NULL;element = root->FirstChildElement();while (true){if (element){std::cout << "-------------------------------------" << std::endl;ReadOneCameraXML(element);}else{std::cout << "-------------------------------------" << std::endl;std::cout << "ParseXML finish" << std::endl;break;}element = element->NextSiblingElement();}return 0;
}/*** @brief: 修改一个CameraI* @param {type} 形参 参数说明* @return: 返回说明* @retval: 返回值说明*/
static void ModifyOneCameraById(tinyxml2::XMLElement *root, tinyxml2::XMLDocument &doc, const CAMERA_INFO_T &cameraInfo)
{tinyxml2::XMLElement *element = NULL;element = root->FirstChildElement();bool isFindId = false;while (true){if (element){const tinyxml2::XMLAttribute *id = element->FindAttribute("id");if (id){std::cout << "current id:\t" << id->IntValue() << std::endl;if (id->IntValue() == cameraInfo.id){std::cout << "Find id:\t" << id->IntValue() << std::endl;isFindId = true;break;}}const tinyxml2::XMLElement *devId = element->FirstChildElement("DevID");if (devId) // 判断某个元素是否存在{std::cout << "current id:\t" << id->IntValue() << std::endl;if (id->IntValue() == cameraInfo.id){std::cout << "Find id:\t" << id->IntValue() << std::endl;isFindId = true;break;}}}else{std::cout << "-------------------------------------" << std::endl;std::cout << "Find XML finish, not find id:\t" << cameraInfo.id << std::endl;break;}// element = root->NextSiblingElement();std::cout << "----------NextSiblingElement------------" << std::endl;element = element->NextSiblingElement(); // 兄弟节点}if (isFindId){std::cout << "isFindId: " << isFindId << std::endl;std::cout << "ipAddr: " << cameraInfo.ipAddr.c_str() << std::endl;element->FirstChildElement("IpAddress")->SetText(cameraInfo.ipAddr.c_str());element->FirstChildElement("SubnetMask")->SetText(cameraInfo.subnetMask.c_str());element->FirstChildElement("ExposureAuto")->SetText(cameraInfo.exposureAuto);element->FirstChildElement("ExposureTime")->SetText(cameraInfo.exposureTime);element->FirstChildElement("TriggerMode")->SetText(cameraInfo.triggerMode);element->SetAttribute("type", cameraInfo.type.c_str());tinyxml2::XMLElement *pPrice = element->FirstChildElement("Price");if (pPrice){pPrice->SetText(cameraInfo.price);}else // 查找失败则说明没有该属性，需要添加{pPrice = doc.NewElement("Price");char cpriceBuf[20];sprintf(cpriceBuf, "%0.2f", cameraInfo.price);std::cout << " Add price: " << cpriceBuf << std::endl;tinyxml2::XMLText *pPriceText = doc.NewText(cpriceBuf);tinyxml2::XMLComment *pPriceComment = doc.NewComment("add price");element->InsertEndChild(pPriceComment);pPrice->InsertEndChild(pPriceText);element->InsertEndChild(pPrice);}}
}/*** @brief: 修改指定ID的camera的参数* @param path 路径* @param camearInfo 新的参数信息* @return: 返回说明* @retval: 返回值说明*/
static int ModifyXMLById(const std::string &path, const CAMERA_INFO_T &camearInfo)
{// 导入文件错误, 退出tinyxml2::XMLDocument doc;tinyxml2::XMLError error = doc.LoadFile(path.c_str());CHECK_TINYXML2_RESULT(error);tinyxml2::XMLElement *root = doc.FirstChildElement("CameraConfig");ModifyOneCameraById(root, doc, camearInfo);error = doc.SaveFile(path.c_str());CHECK_TINYXML2_RESULT(error);return 0;
}void testCameraXML()
{std::string path = "camera_config_1.xml";// // std::string path = "camera_info.xml";std::cout << "---------------生成一个xml文件------------------" << std::endl;WriteXML(path);std::cout << "--------------写文件结束，读取生成的xml文件------------------" << std::endl;ParseXML(path);std::cout << "--------------读文件结束，根据ID查找camera并修改--------------" << std::endl;CAMERA_INFO_T cameraInfo;cameraInfo.id = 6;cameraInfo.type = "hotel";cameraInfo.ipAddr = "111.26.85.8";cameraInfo.subnetMask = "111.26.85.255";cameraInfo.exposureAuto = true;cameraInfo.triggerMode = false;cameraInfo.price = 100;ModifyXMLById(path, cameraInfo);std::cout << "--------------修改文件结束，读取修改的xml文件------------------" << std::endl;ParseXML(path);
}
int main(void)
{testCameraXML();return 0;
}#此处直接是引用tinyxml2.cpp tinyxml2.h，把这二个文件copy到当前目录g++ tinyxml2.cpp tinyxml2.h demo01.cpp -o demo01 -std=c++11
g++ tinyxml2.cpp tinyxml2.h demo02.cpp -o demo02 -std=c++11
g++ tinyxml2.cpp tinyxml2.h demo03.cpp -o demo03 -std=c++11
g++ tinyxml2.cpp tinyxml2.h demo04.cpp -o demo04 -std=c++11
g++ tinyxml2.cpp tinyxml2.h demo05.cpp -o demo05 -std=c++11
