Qt 实现压缩文件、文件夹和解压缩操作zip

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>#defineFILE_MAX_SIZE1024

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;}boolcompression_zip_file(const QString& selectFile2DirPath,const QString& savePath){if(selectFile2DirPath.isEmpty()|| savePath.isEmpty()){returnfalse;}if(!QFile::exists(selectFile2DirPath)||!QFileInfo(savePath).isDir()){returnfalse;}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returnfalse;}
        QString addFileName =QFileInfo(selectFile2DirPath).fileName();
        QZipWriter writer(writerFilePath);
        writer.addFile(addFileName, selectFile.readAll());
        selectFile.close();returntrue;}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())returntrue;returnfalse;}}booldecompression_zip_file(const QString& selectZipFilePath,const QString& savePath){if(selectZipFilePath.isEmpty()|| savePath.isEmpty()){returnfalse;}if(!QFileInfo(selectZipFilePath).isFile()||!QFileInfo(savePath).isDir()){returnfalse;}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

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