使用Qt压缩文件夹/文件

时间:2010-04-08 07:03:26

标签: qt zip

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我们如何使用Qt api类压缩文件夹/文件?

2 个答案:

答案 0 :(得分:28)

几年前我遇到了这样的问题,这是我的解决方案:

1)。得到QuaZip(这里是link text

2)。将quazip源包含在项目文件中

标题:

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 \
           ...

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;

// Получаем список файлов и папок рекурсивно
QStringList sl;
recurseAddDir(dir, sl);

// Создаем массив состоящий из QFileInfo объектов
QFileInfoList files;
foreach (QString fn, sl) files << QFileInfo(fn);

QuaZipFile outFile(&zip);

char c;
foreach(QFileInfo fileInfo, files) {

    if (!fileInfo.isFile())
        continue;

    // Если файл в поддиректории, то добавляем имя этой поддиректории к именам файлов
    // например: fileInfo.filePath() = "D:\Work\Sources\SAGO\svn\sago\Release\tmp_DOCSWIN\Folder\123.opn"
    // тогда после удаления части строки fileNameWithSubFolders будет равен "Folder\123.opn" и т.д.
    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();
}

// + комментарий
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)。享受;)

更新:适用于CapDroid

/* Рекурсивно ищет все файлы в директории \a и добавляет в список \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());
    }
}

答案 1 :(得分:5)

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(也可以说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(自带qt)并提供了这一点。