QT 遍历多层次的XML文档

网上的例子大多是简单的例子的使用，但是对于多层次的或是未知层次的没有相应的记录。自己写了一个QT版的遍历XML的类NodeIterator

nodeiterator.h文件

#ifndef NODEITERATOR_H

#define NODEITERATOR_H

#include <QDomDocument>

class NodeIterator

{

public:

    NodeIterator();

    NodeIterator(QDomNode root);

    bool hasNext();

    QDomNode next();

private:

    QDomNode root, current;

    bool isHasNext;

};

#endif // NODEITERATOR_H

#include "nodeiterator.h"

NodeIterator::NodeIterator()

{

}

NodeIterator::NodeIterator(QDomNode root)

{

    this->root = root;

    current = root;

}

bool NodeIterator::hasNext(){

    if (!root.isNull()) {

        //是否当前节点有子节点

        if (!current.isNull() && current.hasChildNodes()) {

            //将第一个子节点变成当前节点

            current = current.firstChildElement();

            isHasNext = true;

        } else if (!current.isNull()&& !current.nextSiblingElement().isNull()) {

            current = current.nextSiblingElement();

            isHasNext = true;

        } else if (!current.isNull()) {

            while (!current.isNull() && current != root && current.nextSiblingElement().isNull()) {

                current = current.parentNode();

            }

            if (!current.isNull() && current != root) {

                current = current.nextSiblingElement();

                isHasNext = true;

            } else {

                isHasNext = false;

            }

        } else {

            isHasNext = false;

        }

    } else {

        isHasNext = false;

    }

    return isHasNext;

}

QDomNode NodeIterator::next() {

    return current;

}

 QFile *file=new QFile("D:/qt project/SymbolEdit/symbol.xml");

    if( !file->open(QFile::ReadOnly)){

        qDebug()<<"open file failed ";

        return;

    }

    QDomDocument   *document=new QDomDocument;

    QString         strError;

    int        errLin = 0, errCol = 0;

    if( !document->setContent(file, false, &strError, &errLin, &errCol) ) {

        printf( "parse file failedn");

        return;

    }

    if( document->isNull() ) {

        printf( "document is null !n" );

        return;

    }

    QDomElement root = document->documentElement();

    //QIterator<Node>

    if (!root.isNull()) {

        QDomNode current;

        QString name , epTypeAlisaName ;

        for (NodeIterator *it = new NodeIterator((QDomNode)root); it->hasNext();) {

            current = it->next();

            if (!current.isNull() && current.isElement()) {

                name = current.nodeName();

                //如果是电力图元的节点

                if (!name.isNull() && name=="epType") {

                    epTypeAlisaName = current.toElement().attribute("alisaname");

                    QString electricType = current.toElement().attribute("electricType");

                    epTypeAlisaNames->append(epTypeAlisaName);

                    epTypeAlisaNameToElectricTypeName->insert(epTypeAlisaName,electricType);

                }

            }

        }

}

（编辑：李大同）

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