CMarkup--使用 CMarkup库解析xml文件

￡神魔★判官ぃ 2022-07-14 23:19 163阅读 0赞

之前介绍过tinyxml:  
《[windows客户端开发–使用tinyxml库解析xml文件][windows_tinyxml_xml]》

今天再介绍另一个强大的操作xml的库：

**CMarkup**  
Simple C++ performance for text data and XML

官网：  
[http://www.firstobject.com/][http_www.firstobject.com]

**创建一个xml document：**

CMarkup xml;
    xml.AddElem( "ORDER" );
    xml.IntoElem();
    xml.AddElem( "ITEM" );
    xml.IntoElem();
    xml.AddElem( "SN", "132487A-J" );
    xml.AddElem( "NAME", "crank casing" );
    xml.AddElem( "QTY", "1" );

结果：

<ORDER>
      <ITEM>
        <SN>132487A-J</SN>
        <NAME>crank casing</NAME>
        <QTY>1</QTY>
      </ITEM>
    </ORDER>

**保存：**

xml.Save( "C:\\Sample.xml" );

**作为字符串返回：**

MCD_STR strXML = xml.GetDoc();

**加载xml：**

xml.Load( "C:\\Sample.xml" );

**得到字符串：**

xml.SetDoc( strXML );

**浏览特定元素：**

xml.FindElem(); // root ORDER element
    xml.IntoElem(); // inside ORDER
    while ( xml.FindElem("ITEM") )
    {
        xml.IntoElem();
        xml.FindElem( "SN" );
        MCD_STR strSN = xml.GetData();
        xml.FindElem( "QTY" );
        int nQty = atoi( MCD_2PCSZ(xml.GetData()) );
        xml.OutOfElem();
    }

**增加元素和属性：**

CMarkup xml;
    xml.AddElem( "ORDER" );
    xml.IntoElem(); // inside ORDER
    for ( int nItem=0; nItem<aItems.GetSize(); ++nItem )
    {
        xml.AddElem( "ITEM" );
        xml.IntoElem(); // inside ITEM
        xml.AddElem( "SN", aItems[nItem].strSN );
        xml.AddElem( "NAME", aItems[nItem].strName );
        xml.AddElem( "QTY", aItems[nItem].nQty );
        xml.OutOfElem(); // back out to ITEM level
    }
    xml.AddElem( "SHIPMENT" );
    xml.IntoElem(); // inside SHIPMENT
    xml.AddElem( "POC" );
    xml.SetAttrib( "type", strPOCType );
    xml.IntoElem(); // inside POC
    xml.AddElem( "NAME", strPOCName );
    xml.AddElem( "TEL", strPOCTel );

结果：

<ORDER>
    <ITEM>
    <SN>132487A-J</SN>
    <NAME>crank casing</NAME>
    <QTY>1</QTY>
    </ITEM>
    <ITEM>
    <SN>4238764-A</SN>
    <NAME>bearing</NAME>
    <QTY>15</QTY>
    </ITEM>
    <SHIPMENT>
    <POC type="non-emergency">
    <NAME>John Smith</NAME>
    <TEL>555-1234</TEL>
    </POC>
    </SHIPMENT>
    </ORDER>

**查找元素：**

{
        xml.IntoElem();
        xml.FindElem( "SN" );
        MCD_STR strSN = xml.GetData();
        xml.ResetMainPos();
        xml.FindElem( "QTY" );
        int nQty = atoi( MCD_2PCSZ(xml.GetData()) );
        xml.OutOfElem();
    }

xml.ResetPos(); // top of document
    xml.FindElem(); // ORDER element is root
    xml.IntoElem(); // inside ORDER
    while ( xml.FindElem("ITEM") )
    {
        xml.FindChildElem( "SN" );
        if ( xml.GetChildData() == strFindSN )
            break; // found
    }

**CMarkup与tinyxml对比**  
参考：  
[http://blog.csdn.net/suxinpingtao51/article/details/34424539][http_blog.csdn.net_suxinpingtao51_article_details_34424539]

在使用tinyxml时，可能会new好多对象，但tinyxml的每个对象，在被释放析构时，会将它下面的所有节点都释放点，如TiXmlDocument 文档对象，我们只需要delete doc即可，若是你还delete pElemRoot; delete pElemData，则在运行时会被二次释放报错。

尽量不要在xml中使用中文  
TinyXml只认识UTF-8和ISO 8859-1编码, 而不知GB2312为何物, 但事实上你以GB2312在文档中写入中文, 之后可以正确读取, 而且文档在记事本中打开也能显示正确的中文, 其实这是种巧合, 并不是TinyXml支持GB2312了.

[windows_tinyxml_xml]: http://blog.csdn.net/wangshubo1989/article/details/50958884
[http_www.firstobject.com]: http://www.firstobject.com/
[http_blog.csdn.net_suxinpingtao51_article_details_34424539]: http://blog.csdn.net/suxinpingtao51/article/details/34424539