[原][库][c++]tinyxml使用小结

参考：http://blog.****.net/L_Andy/article/details/40615517

tinyxml官网：

http://www.grinninglizard.com/tinyxml/

官方文档：

http://www.grinninglizard.com/tinyxmldocs/index.html

github上文件下载地址：
https://sourceforge.net/projects/tinyxml/

TinyXML类：

TiXmlBase：整个TinyXML模型的基类。
TiXmlAttribute：对应于XML中的元素的属性。
TiXmlNode：对应于DOM结构中的节点。
TiXmlComment：对应于XML中的注释。<!--XXXXX.-->
TiXmlDeclaration：对应于XML中的申明部分，即<？versiong="1.0" ?>。
TiXmlDocument：对应于XML的整个文档。
TiXmlElement：对应于XML的元素。
TiXmlText：对应于XML的文字部分。
TiXmlUnknown：对应于XML的未知部分。
TiXmlHandler：定义了针对XML的一些操作。

使用：

XML:

<?xml version="1.0" encoding="UTF-8"?>
<phonebook>
    <!--one item behalfs one contacted person.-->
    <item>
        <name>miaomaio</name>
    <addr>Shaanxi Xi'an</addr>
    <tel>13759911917</tel>
    <email>[e-mail]</email>
    </item>
    <item>
        <name>gougou</name>
    <addr>Liaoning Shenyang</addr>
    <tel>15840330481</tel>
    <email>[e-mail]</email>
    </item>
    <!--more contacted persons.-->
</phonebook>  

C++:

//______________________________________________________________________
// Read information from xml file.  

// define xml file path, as follow , we use relative path,
// but you can use absolute path also.
const char* filepath = "phonebookdata.xml";
TiXmlDocument doc(filepath);
bool loadOkay = doc.LoadFile();
// faile to load 'phonebookdata.xml'.
if (!loadOkay) {
    printf( "Could not load test file %s. Error='%s'. Exiting.\n", filepath,doc.ErrorDesc() );
    exit(  );
}  

// get dom root of 'phonebookdata.xml', here root should be 'phonebook'.
TiXmlElement* root = doc.RootElement();  

printf("_______________________________________\n\n");
printf("     contacted person information      \n\n");
// trace every items below root.
for( TiXmlNode*  item = root->FirstChild( "item" );
         item;
         item = item->NextSibling( "item" ) ) {
    printf("_______________________________________\n");  

    // read name.
    TiXmlNode* child = item->FirstChild();
    const char* name = child->ToElement()->GetText();
    if (name) {
        printf("name:%s\n",name);
    } else {
        printf("name:\n");
    }  

    // read address.
    child = item->IterateChildren(child);
    const char* addr = child->ToElement()->GetText();
    if (addr) {
        printf("addr:%s\n",addr);
    } else {
        printf("addr:\n");
    }  

    // read telephone no.
    child = item->IterateChildren(child);
    const char* tel = child->ToElement()->GetText();
        if (tel) {
        printf("tel:%s\n",tel);
    } else {
        printf("tel:\n");
    }  

    // read e-mail.
    child = item->IterateChildren(child);
    const char* email = child->ToElement()->GetText();
    if(email) {
        printf("email:%s\n",email);
    } else {
        printf("email:\n");
    }  

    printf("\n");  

}
//______________________________________________________________________  

//______________________________________________________________________
// Add information to xml file and save it.
TiXmlElement* writeRoot = doc.RootElement();
TiXmlNode* newNode = new TiXmlElement("item");  

   const TiXmlNode* name4NewNode = new TiXmlElement("name");
newNode->InsertEndChild(*name4NewNode)->InsertEndChild(TiXmlText("pipi"));  

const TiXmlNode* addr4NewNode = new TiXmlElement("addr");
newNode->InsertEndChild(*addr4NewNode)->InsertEndChild(TiXmlText("Shaanxi Xianyang"));  

const TiXmlNode* tel4NewNode = new TiXmlElement("tel");
newNode->InsertEndChild(*tel4NewNode)->InsertEndChild(TiXmlText(""));  

const TiXmlNode* email4NewNode = new TiXmlElement("email");
newNode->InsertEndChild(*email4NewNode)->InsertEndChild(TiXmlText("[e-mail]"));  

writeRoot->InsertEndChild(*newNode);
doc.SaveFile();
//______________________________________________________________________