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?
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。