使用Qt压缩文件夹/文件

Question

我想知道Qt中是否有可以压缩文件夹或文件的类.我使用QProcess进行压缩,它被压缩但我无法使用普通的zip工具解压缩它.任何人都可以让我知道如何使用Qt api类压缩文件夹/文件？

Answer 1

几年前我遇到了这样的问题,这是我的解决方案:

1).获取QuaZip(这是链接文本)

2).将quazip源包含在项目文件中

头:

HEADERS += src/quazip/crypt.h \
           src/quazip/ioapi.h \
           src/quazip/quazip.h \
           src/quazip/quazipfile.h \
           src/quazip/quazipfileinfo.h \
           src/quazip/quazipnewinfo.h \
           src/quazip/unzip.h \
           src/quazip/zip.h \
           ...

资料来源:

SOURCES += src/quazip/ioapi.c \
           src/quazip/quazip.cpp \
           src/quazip/quazipfile.cpp \
           src/quazip/quazipnewinfo.cpp \
           src/quazip/unzip.c \
           src/quazip/zip.c
           ...

3).添加标题

#include "quazip/quazip.h"
#include "quazip/quazipfile.h"

4).使用提取功能:

static bool extract(const QString & filePath, const QString & extDirPath, const QString & singleFileName = QString("")) {

QuaZip zip(filePath);

if (!zip.open(QuaZip::mdUnzip)) {
    qWarning("testRead(): zip.open(): %d", zip.getZipError());
    return false;
}

zip.setFileNameCodec("IBM866");

qWarning("%d entries\n", zip.getEntriesCount());
qWarning("Global comment: %s\n", zip.getComment().toLocal8Bit().constData());

QuaZipFileInfo info;

QuaZipFile file(&zip);

QFile out;
QString name;
char c;
for (bool more = zip.goToFirstFile(); more; more = zip.goToNextFile()) {

    if (!zip.getCurrentFileInfo(&info)) {
        qWarning("testRead(): getCurrentFileInfo(): %d\n", zip.getZipError());
        return false;
    }

    if (!singleFileName.isEmpty())
        if (!info.name.contains(singleFileName))
            continue;

    if (!file.open(QIODevice::ReadOnly)) {
        qWarning("testRead(): file.open(): %d", file.getZipError());
        return false;
    }

    name = QString("%1/%2").arg(extDirPath).arg(file.getActualFileName());

    if (file.getZipError() != UNZ_OK) {
        qWarning("testRead(): file.getFileName(): %d", file.getZipError());
        return false;
    }

    //out.setFileName("out/" + name);
    out.setFileName(name);

    // this will fail if "name" contains subdirectories, but we don't mind that
    out.open(QIODevice::WriteOnly);
    // Slow like hell (on GNU/Linux at least), but it is not my fault.
    // Not ZIP/UNZIP package's fault either.
    // The slowest thing here is out.putChar(c).
    while (file.getChar(&c)) out.putChar(c);

    out.close();

    if (file.getZipError() != UNZ_OK) {
        qWarning("testRead(): file.getFileName(): %d", file.getZipError());
        return false;
    }

    if (!file.atEnd()) {
        qWarning("testRead(): read all but not EOF");
        return false;
    }

    file.close();

    if (file.getZipError() != UNZ_OK) {
        qWarning("testRead(): file.close(): %d", file.getZipError());
        return false;
    }
}

zip.close();

if (zip.getZipError() != UNZ_OK) {
    qWarning("testRead(): zip.close(): %d", zip.getZipError());
    return false;
}

return true;
}

和归档功能:

static bool archive(const QString & filePath, const QDir & dir, const QString & comment = QString("")) {

QuaZip zip(filePath);
zip.setFileNameCodec("IBM866");

if (!zip.open(QuaZip::mdCreate)) {
    myMessageOutput(true, QtDebugMsg, QString("testCreate(): zip.open(): %1").arg(zip.getZipError()));
    return false;
}

if (!dir.exists()) {
    myMessageOutput(true, QtDebugMsg, QString("dir.exists(%1)=FALSE").arg(dir.absolutePath()));
    return false;
}

QFile inFile;

// ???????? ?????? ?????? ? ????? ??????????
QStringList sl;
recurseAddDir(dir, sl);

// ??????? ?????? ????????? ?? QFileInfo ????????
QFileInfoList files;
foreach (QString fn, sl) files << QFileInfo(fn);

QuaZipFile outFile(&zip);

char c;
foreach(QFileInfo fileInfo, files) {

    if (!fileInfo.isFile())
        continue;

    // ???? ???? ? ?????????????, ?? ????????? ??? ???? ????????????? ? ?????? ??????
    // ????????: fileInfo.filePath() = "D:\Work\Sources\SAGO\svn\sago\Release\tmp_DOCSWIN\Folder\123.opn"
    // ????? ????? ???????? ????? ?????? fileNameWithSubFolders ????? ????? "Folder\123.opn" ? ?.?.
    QString fileNameWithRelativePath = fileInfo.filePath().remove(0, dir.absolutePath().length() + 1);

    inFile.setFileName(fileInfo.filePath());

    if (!inFile.open(QIODevice::ReadOnly)) {
        myMessageOutput(true, QtDebugMsg, QString("testCreate(): inFile.open(): %1").arg(inFile.errorString().toLocal8Bit().constData()));
        return false;
    }

    if (!outFile.open(QIODevice::WriteOnly, QuaZipNewInfo(fileNameWithRelativePath, fileInfo.filePath()))) {
        myMessageOutput(true, QtDebugMsg, QString("testCreate(): outFile.open(): %1").arg(outFile.getZipError()));
        return false;
    }

    while (inFile.getChar(&c) && outFile.putChar(c));

    if (outFile.getZipError() != UNZ_OK) {
        myMessageOutput(true, QtDebugMsg, QString("testCreate(): outFile.putChar(): %1").arg(outFile.getZipError()));
        return false;
    }

    outFile.close();

    if (outFile.getZipError() != UNZ_OK) {
        myMessageOutput(true, QtDebugMsg, QString("testCreate(): outFile.close(): %1").arg(outFile.getZipError()));
        return false;
    }

    inFile.close();
}

// + ???????????
if (!comment.isEmpty())
    zip.setComment(comment);

zip.close();

if (zip.getZipError() != 0) {
    myMessageOutput(true, QtDebugMsg, QString("testCreate(): zip.close(): %1").arg(zip.getZipError()));
    return false;
}

return true;
}

5).请享用 ;)

更新:适用于CapDroid.

/* ?????????? ???? ??? ????? ? ?????????? \a ? ????????? ? ?????? \b */
static void recurseAddDir(QDir d, QStringList & list) {

    QStringList qsl = d.entryList(QDir::NoDotAndDotDot | QDir::Dirs | QDir::Files);

    foreach (QString file, qsl) {

        QFileInfo finfo(QString("%1/%2").arg(d.path()).arg(file));

        if (finfo.isSymLink())
            return;

        if (finfo.isDir()) {

            QString dirname = finfo.fileName();
            QDir sd(finfo.filePath());

            recurseAddDir(sd, list);

        } else
            list << QDir::toNativeSeparators(finfo.filePath());
    }
}

Answer 2

我认为你不能.据我所知,qcompress和quncompress只提供压缩流等.这意味着它们不会创建真正的zipfile所需的头文件(也说明文件中包含哪些文件).

然而,有一个名为QuaZip的开源Qt库,它使用zlib(随qt一起提供)并提供了这一点.

Answer 3

我使用的是 Qt 5.12 版本。

在 pro 文件中，添加“QT += gui-private”。

在cpp文件中，例如：

#include "QtGui/private/qzipreader_p.h"
#include "QtGui/private/qzipwriter_p.h"

......


QFileInfoList list = getFileList(zipPath);//zipPath
QZipWriter writer(zipFile);
if(list.size()<=0){
    qDebug()<<"there is no file to zip, please check it";
    return false;
}
//
for(int i=0;i != list.size(); i++){
    QString filename=list.at(i).filePath();
    qDebug()<<"filename:"<<filename.mid(pos+1);
    QFile file(filename);
    if(file.exists()){
        file.open(QIODevice::ReadOnly);
        writer.addFile(filename.mid(pos+1), file.readAll());
        file.close();
    }
    else{
        qDebug()<<"file not exist:"<<filename;
    }
}
writer.close();