Qt xml增删改

媒体中心文件管理

最新推荐文章于 2022-10-11 10:41:56 发布

转载最新推荐文章于 2022-10-11 10:41:56 发布 · 84 阅读

0 ·

CC 4.0 BY-SA版权

原文链接：http://www.cnblogs.com/jiushishuai/p/9452128.html

//定义公用文件

//mediacentercommon.h

#pragma once

#include <QString>

struct XmlFileNode
{
   QString fileID;               //MD5
   QString fileName;
   QString filePath;
   QString ThumbnailPath;
};

enum FolderKind{
   FOLDER_PICTURE = 0,
   FOLDER_VIDEO,
   FOLDER_MUSIC,
   FOLDER_DOWNLOAD,
   FOLDER_PERMISSION
};

//xml root node
const char* const   ROOT_SHARELIST   = "ShareList";

//xml node
const char* const   NODE_PICTURE       = "Picture";
const char* const NODE_VIDEO       = "Video";
const char* const NODE_MUSIC       = "Music";

//xml element
const char* const   ELEMENT_FILE       = "file";

//xml attribute
const char* const ATTRIBUTE_THUMBNAIL   = "ThumbnailPath";
const char* const   ATTRIBUTE_FILEPATH   = "FileFillPath";
const char* const ATTRIBUTE_FILENAME   = "FileName";
const char* const   ATTRIBUTE_FILEID       = "FileID";

//头文件

#pragma once

#include <QDomDocument>

#include <QList>

#include <QFile>

#include <QStringList>

#include <QObject>

#include "mediacentercommon.h"

#define MS_SHARELSIT CShareFileList::instance()

class CShareFileList : public QObject

	Q_OBJECT

public:

	static CShareFileList *instance();

	~CShareFileList(void);

	void setShareListFile(const QString &filePath);

	void getFileFromXML(QList<XmlFileNode> &fileInfoList, FolderKind fileKind);

	void addFileToXML(QList<XmlFileNode> &fileInfoList, FolderKind fileKind);

	void deleteFileToXML(QStringList &pathList, FolderKind fileKind);

private slots:

	void onSetItemFileID(QString fileID, int index);

private:

	CShareFileList(void);

	void saveDomDocToFile();

	void readFileToDomDoc(QDomDocument &domList, const QString &filePath);

	QDomNode getDomElement(FolderKind fileKind);

	void rewriteFile();

private:

	QDomDocument		m_domDoc;

	QFile				*m_pXmlFile;

	QList<XmlFileNode>	m_fileNodeList;

	FolderKind			m_folderKind;	//save add file kind

	//if m_iCountFileID == m_fileNodeList.count() all file fileID get finished

	int					m_iCountFileID;

	static CShareFileList *m_pInstance;

};

//源代码
#include "sharefilelist.h"

#include "calculatefileid.h"

#include <QTextStream>

CShareFileList* CShareFileList::m_pInstance = NULL;

CShareFileList::CShareFileList(void)

	: m_pXmlFile(NULL)

	, m_iCountFileID(0)

CShareFileList::~CShareFileList(void)

	delete m_pXmlFile;

	m_pXmlFile = NULL;

}
//设置xml文件路径

void CShareFileList::setShareListFile(const QString &filePath)

	if (m_pXmlFile)

		delete m_pXmlFile;

		m_pXmlFile = NULL;

	m_pXmlFile = new QFile(filePath);

	if (!m_pXmlFile->exists())

		//create new file and set root node

		m_pXmlFile->open(QIODevice::WriteOnly);

		QDomElement rootElement = m_domDoc.createElement(ROOT_SHARELIST);

		m_domDoc.appendChild(rootElement);

		m_pXmlFile->close();

	if (!m_pXmlFile->open(QIODevice::ReadOnly))

		//open file failed

		return;

	}
        //将xml文件托管到QDomDocument

	if (!m_domDoc.setContent(m_pXmlFile))

		m_pXmlFile->close();

		return;

	m_pXmlFile->close();

	QDomElement domElement = m_domDoc.documentElement();

	if ((domElement.nodeName().compare(ROOT_SHARELIST, Qt::CaseInsensitive) != 0))

		//the file is not share list file

		return;

void CShareFileList::getFileFromXML(QList<XmlFileNode> &fileInfoList, FolderKind fileKind)

	QDomNode domNode = getDomElement(fileKind);

	QDomNodeList nodeList = domNode.childNodes();

	const int COUNT = nodeList.count();

	for (int i = 0; i < COUNT; i++)

		QDomNode domNode = nodeList.at(i);

		QDomElement element = domNode.toElement();

		XmlFileNode fileNode;

		fileNode.fileID = element.attribute(ATTRIBUTE_FILEID);

		fileNode.fileName = element.attribute(ATTRIBUTE_FILENAME);

		fileNode.filePath = element.attribute(ATTRIBUTE_FILEPATH);

		fileNode.ThumbnailPath = element.attribute(ATTRIBUTE_THUMBNAIL);

		fileInfoList.append(fileNode);

void CShareFileList::onSetItemFileID(QString fileID, int index)

	m_fileNodeList[index].fileID = fileID;

	m_iCountFileID++;

	if (m_iCountFileID == m_fileNodeList.count())

		saveDomDocToFile();

void CShareFileList::addFileToXML(QList<XmlFileNode> &fileInfoList

	, FolderKind fileKind)

	m_fileNodeList = fileInfoList;

	m_folderKind = fileKind;

	m_iCountFileID = 0;

	//start thread get fileID

	int index = 0;

	int m_iCountFileID = 0;

	foreach(XmlFileNode fileNode, m_fileNodeList)

		CCalculateFileIDThread thread = CCalculateFileIDThread(fileNode.filePath

			, index++);

		thread.start();

		connect(&thread, SIGNAL(signalFinished(QString, int)), this

			, SLOT(onSetItemFileID(QString, int)));

void CShareFileList::deleteFileToXML(QStringList &pathList, FolderKind fileKind)

	QDomNode domNode = getDomElement(fileKind);

	QDomNodeList nodeList = domNode.childNodes();

	const int COUNT = nodeList.count();

	const int FILECOUNT = pathList.count();

	for (int i = 0; i < FILECOUNT; i++)

		for (int j = COUNT - 1; j >= 0; j--)

			QDomNode node = nodeList.item(j);

			QDomElement domElement = node.toElement();

			QString path = domElement.attribute(ATTRIBUTE_FILEPATH);

			if (path == pathList[i])

				domNode.removeChild(node);

	rewriteFile();

void CShareFileList::saveDomDocToFile()

	QDomNode domNode = getDomElement(m_folderKind);

	foreach(XmlFileNode fileNode, m_fileNodeList)

		QDomElement newElement = m_domDoc.createElement(ELEMENT_FILE);

		newElement.setAttribute(ATTRIBUTE_FILENAME, fileNode.fileName);

		newElement.setAttribute(ATTRIBUTE_THUMBNAIL, fileNode.ThumbnailPath);

		newElement.setAttribute(ATTRIBUTE_FILEID, fileNode.fileID);

		newElement.setAttribute(ATTRIBUTE_FILEPATH, fileNode.filePath);

		domNode.appendChild(newElement);

	rewriteFile();

void CShareFileList::rewriteFile()

	m_pXmlFile->open(QIODevice::WriteOnly);

	QTextStream textStream(m_pXmlFile);

	m_domDoc.save(textStream, 4);

	m_pXmlFile->close();

void CShareFileList::readFileToDomDoc(QDomDocument &domList, const QString &filePath)

	QFile xmlFile(filePath);

	if (xmlFile.open(QIODevice::ReadOnly))

		return;

	if (!domList.setContent(&xmlFile))

		xmlFile.close();

		return;

	xmlFile.close();

QDomNode CShareFileList::getDomElement(FolderKind fileKind)

	QString nodeName;

	switch(fileKind)

	case FOLDER_PICTURE:

		nodeName = NODE_PICTURE;

		break;

	case FOLDER_VIDEO:

		nodeName = NODE_VIDEO;

		break;

	case FOLDER_MUSIC:

		nodeName = NODE_MUSIC;

		break;

	default:

		break;

	QDomElement rootElement = m_domDoc.documentElement();

	QDomNodeList nodeList = rootElement.childNodes();

	const int COUNT = nodeList.count();

	for (int i = 0; i < COUNT; i++)

		QDomNode domNode = nodeList.at(i);

		if (domNode.nodeName() == nodeName)

			return domNode;

	//create new node if the node is not exist

	QDomElement newElement = m_domDoc.createElement(nodeName);

	rootElement.appendChild(newElement);

	return rootElement.lastChild();

CShareFileList * CShareFileList::instance()

	if (!m_pInstance)

		m_pInstance = new CShareFileList;

	return m_pInstance;

}

//xml文档
<?xml version='1.0' encoding='utf-8'?>
<ShareList UsingRelativePaths="false">
    <Video/>
    <Music/>
    <Picture>
        <file FileName="Koala.jpg" ThumbnailPath="" FileID="2b04df3ecc1d94afddff082d139c6f15" FileFillPath="C:/Users/Public/Pictures/Sample Pictures/Koala.jpg"/>
        <file FileName="Lighthouse.jpg" ThumbnailPath="" FileID="8969288f4245120e7c3870287cce0ff3" FileFillPath="C:/Users/Public/Pictures/Sample Pictures/Lighthouse.jpg"/>
        <file FileName="Penguins.jpg" ThumbnailPath="" FileID="9d377b10ce778c4938b3c7e2c63a229a" FileFillPath="C:/Users/Public/Pictures/Sample Pictures/Penguins.jpg"/>
        <file FileName="Tulips.jpg" ThumbnailPath="" FileID="fafa5efeaf3cbe3b23b2748d13e629a1" FileFillPath="C:/Users/Public/Pictures/Sample Pictures/Tulips.jpg"/>
    </Picture>
</ShareList>

转载于:https://www.cnblogs.com/jiushishuai/p/9452128.html