一、实现方式
通过Qt自带的库来实现,使用多线程方式,通过信号和槽来触发压缩与解压缩,并将压缩和解压缩结果回传过来。
使用的类:
#include "QtGui/private/qzipreader_p.h"
#include "QtGui/private/qzipwriter_p.h"
二、环境准备
1、在.pro文件中添加模块gui-private
QT += core gui gui-private
若未cmake工程,需要在CMakeList.txt中添加
includeinclude_directories(${Qt5Gui_PRIVATE_INCLUDE_DIRS}))
三、实现示例
#include <QFileInfoList>
#include <QDir>
#include <QFileInfo>
#define FILE_MAX_SIZE 1024
QFileInfoList ergodic_compression_file(QZipWriter *writer, const QString& rootPath, QString dirPath)
{
QDir crrDir(dirPath);
///解压失败的文件
QFileInfoList errFileList;
///添加文件
QFileInfoList fileList = crrDir.entryInfoList(QDir::Files | QDir::Hidden);
for (const QFileInfo& fileInfo : fileList)
{
QString subFilePath = fileInfo.absoluteFilePath();
QString zipWithinfilePath = subFilePath.mid(rootPath.size() + 1);
QFile file(subFilePath);
qint64 size = file.size() / 1024 / 1024;
if (!file.open(QIODevice::ReadOnly) || size > FILE_MAX_SIZE)
{
///打开文件失败,或者大于1GB导致无法解压的文件
errFileList.append(fileInfo);
continue;
}
writer->addFile(zipWithinfilePath, file.readAll());
file.close();
}
///添加文件夹
QFileInfoList folderList = crrDir.entryInfoList(QDir::Dirs | QDir::NoDotAndDotDot);
for (const QFileInfo& folderInfo : folderList)
{
QString subDirPath = folderInfo.absoluteFilePath();
QString zipWithinDirPath = subDirPath.mid(rootPath.size() + 1);
writer->addDirectory(zipWithinDirPath);
QFileInfoList child_file_list = ergodic_compression_file(writer, rootPath, subDirPath);
errFileList.append(child_file_list);
}
return errFileList;
}
bool compression_zip_file(const QString& selectFile2DirPath, const QString& savePath)
{
if (selectFile2DirPath.isEmpty() || savePath.isEmpty())
{
return false;
}
if (!QFile::exists(selectFile2DirPath) || !QFileInfo(savePath).isDir())
{
return false;
}
if (QFileInfo(selectFile2DirPath).isFile())///压缩的是一个文件
{
QString fileName = QFileInfo(selectFile2DirPath).baseName();
QString writerFilePath = savePath + "/" + fileName + ".zip";
QFile selectFile(selectFile2DirPath);
qint64 size = selectFile.size() / 1024 / 1024;
if (!selectFile.open(QIODevice::ReadOnly) || size > FILE_MAX_SIZE)
{
///打开文件失败,或者大于1GB导致无法压缩的文件
return false;
}
QString addFileName = QFileInfo(selectFile2DirPath).fileName();
QZipWriter writer(writerFilePath);
writer.addFile(addFileName, selectFile.readAll());
selectFile.close();
return true;
}
else///压缩的是一个文件夹
{
QString zipRootFolder = selectFile2DirPath.mid(selectFile2DirPath.lastIndexOf("/") + 1);
QString selectDirUpDir = selectFile2DirPath.left(selectFile2DirPath.lastIndexOf("/"));
QString saveFilePath = savePath + "/" + zipRootFolder + ".zip";
QZipWriter writer(saveFilePath);
writer.addDirectory(zipRootFolder);
QFileInfoList fileList = ergodic_compression_file(&writer, selectDirUpDir, selectFile2DirPath);
writer.close();
if (0 == fileList.size())
return true;
return false;
}
}
bool decompression_zip_file(const QString& selectZipFilePath, const QString& savePath)
{
if (selectZipFilePath.isEmpty() || savePath.isEmpty())
{
return false;
}
if (!QFileInfo(selectZipFilePath).isFile() || !QFileInfo(savePath).isDir())
{
return false;
}
bool ret = true;
QZipReader zipReader(selectZipFilePath);
QVector<QZipReader::FileInfo> zipAllFiles = zipReader.fileInfoList();
for (const QZipReader::FileInfo& zipFileInfo : zipAllFiles)
{
const QString currDir2File = savePath + "/" + zipFileInfo.filePath;
if (zipFileInfo.isSymLink)
{
QString destination = QFile::decodeName(zipReader.fileData(zipFileInfo.filePath));
if (destination.isEmpty())
{
ret = false;
continue;
}
QFileInfo linkFi(currDir2File);
if (!QFile::exists(linkFi.absolutePath()))
QDir::root().mkpath(linkFi.absolutePath());
if (!QFile::link(destination, currDir2File))
{
ret = false;
continue;
}
}
if (zipFileInfo.isDir)
{
QDir(savePath).mkpath(currDir2File);
}
if (zipFileInfo.isFile)
{
QByteArray dt = zipFileInfo.filePath.toUtf8();
QString strtmp = QString::fromLocal8Bit(dt);
QFile currFile(currDir2File);
if (!currFile.isOpen())
{
currFile.open(QIODevice::WriteOnly);
}
else {
ret = false;
continue;
}
qint64 size = zipFileInfo.size / 1024 / 1024;
if (size > FILE_MAX_SIZE)
{
ret = false;
continue;
}
QByteArray byteArr = zipReader.fileData(strtmp);
currFile.write(byteArr);
currFile.setPermissions(zipFileInfo.permissions);
currFile.close();
}
}
zipReader.close();
return ret;
}
待验证:
1、中文路径,文件名含有中文
2、隐藏文件夹,.dir和…dir,例如:.vs
待完善:
1、保存路径不存在,直接创建
2、单个超大文件的支持(1G以上)
3、当前操作文件回调
4、进度回调文章来源:https://www.toymoban.com/news/detail-625475.html
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