QT XML文件 修改节点

感谢：l270378034的帮助

源xml文件：

<kdevelop>   <general>     <author>zeki</author>     <email>[e-mail]</email>   </general></kdevelop>

源程序：

#include "mainwindow.h"#include "ui_mainwindow.h"MainWindow::MainWindow(QWidget *parent) :    QMainWindow(parent),    ui(new Ui::MainWindow){    ui->setupUi(this);     changeSave();}MainWindow::~MainWindow(){    delete ui;}bool MainWindow::openXmlFile(QString FilePath){    QFile file( FilePath );        if( !file.open( QFile::ReadOnly | QFile::Text  ) )        {            qDebug() << QObject::tr("error::ParserXML->OpenXmlFile->file.open->%s\n") << FilePath;            return false;        }        if( !m_doc.setContent( &file ) )        {            qDebug() << QObject::tr("error::ParserXML->OpenXmlFile->doc.setContent\n") << FilePath;            file.close();            return false;        }        file.close();        return true;}bool MainWindow::changeSave(){    if(!openXmlFile("/home/qust/qt/XML/2.xml"))        {            return false;        }        //修改保存xml    QDomElement root = m_doc.documentElement();       if(root.tagName()!= "kdevelop")           return false;       QDomNode n = root.firstChild();       while ( !n.isNull() )       {           QDomElement e = n.toElement();           if( !e.isNull())           {                       if( e.nodeName() == "general" )                       {                           QDomNodeList list = e.childNodes(); //获得元素e的所有子节点的列表                           for(int a=0; a<list.count(); a++) //遍历该列表                           {                               QDomNode node = list.at(a);                               if(node.isElement())                               {                                   if( node.nodeName() == "author" )                                   { QDomNode oldnode = node.firstChild();     //标签之间的内容作为节点的子节点出现，得到原来的子节点                                       node.firstChild().setNodeValue("csdn");   //用提供的value值来设置子节点的内容                                       QDomNode newnode = node.firstChild();     //值修改过后                                       node.replaceChild(newnode,oldnode);      //调用节点的replaceChild方法实现修改功能                                   }                                   if( node.nodeName() == "email" )                                   {                                       QDomNode oldnode = node.firstChild();                                       node.firstChild().setNodeValue("[e-mail]");                                       QDomNode newnode = node.firstChild();                                       node.replaceChild(newnode,oldnode);                                   }                               }                           }                       }                   }           n = n.nextSibling();             }             QFile filexml("/home/qust/qt/XML/2.xml");             if( !filexml.open( QFile::WriteOnly | QFile::Truncate) ){                 qWarning("error::ParserXML->writeOperateXml->file.open\n");                 return false;                    }                    QTextStream ts(&filexml);                    ts.reset();                    ts.setCodec("utf-8");                    m_doc.save(ts, 4, QDomNode::EncodingFromTextStream);                    filexml.close();                    return true;}

运行后：

<kdevelop>  <general>    <author>csdn</author>    <email>[e-mail]</email>  </general></kdevelop>

QDomNode QDomNode::nextSibling () const

Returns the next sibling in the document tree. Changing the returned node will also change the node in the document tree.

If you have XML like this:

 <h1>Heading</h1> <p>The text...</p> <h2>Next heading</h2>

and this QDomNode represents the <p> tag, nextSibling() will return the node representing the <h2> tag.

sibling 1.同层级 2.同辈 3.兄弟或姊妹。 4.同胞 Sibling 1.同胞兄妹