Qt 编译使用Bit7z库接口调用7z.dll、7-Zip.dll解压压缩常用Zip、ISO9660、Wim、Esd、7z等格式文件（二）
修改qt5 7zip源码编译及使用(含展示进度)一文中的封装类ZlibHelper代码类，继承多线程，使解压，压缩时进度条不影响界面，同时添加压缩文件中的文件预览功能，建议直接看源码
导读
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- 相关代码
- 内容扩展
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- 预览内容时获取文件修改时间
- 预览内容时获取文件大小
相关代码
lib_bit7z.h 头文件代码
#ifndef LIB_BIT7Z_H
#define LIB_BIT7Z_H
#if defined(_MSC_VER) && (_MSC_VER >= 1600)
# pragma execution_character_set("utf-8")
#endif
#include "singleton.h"
#include lib_bit7z.cpp头文件代码
#include "lib_bit7z.h"
#include %2").arg(size).arg(QString::number(process,'f',2));
if (m_nTotalSize == 0)
{
return;
}
emit sigProgress(size, m_nTotalSize);
}
//----------------------------------------------------------------------------
void Lib_bit7z::callbackFile(wstring filename)
{
string temp = wstringToString_WindowsApi(filename.c_str());
QString sContent = QString::fromLocal8Bit(temp.c_str());
// qDebug()<
emit sigProgressFile(sContent);
}
void Lib_bit7z::callbackTotal(uint64_t size)
{
m_nTotalSize = size;
qDebug()<<QString("total -- %1").arg(size);
}
wstring Lib_bit7z::stringToWstring_WindowApi(const string &str)
{
int nLen = MultiByteToWideChar(CP_ACP, 0, str.c_str(), str.size(), nullptr, 0);
wchar_t* buffer = new wchar_t[nLen + 1];
MultiByteToWideChar(CP_ACP, 0, str.c_str(), str.size(), buffer, nLen);
buffer[nLen] = '\0'; //字符串断尾
wstring wstr = buffer; //赋值
delete[] buffer; //删除缓冲区
return wstr;
// return L"";
}
string Lib_bit7z::wstringToString_WindowsApi(const wstring &wstr)
{
int nLen = WideCharToMultiByte(CP_ACP, 0, wstr.c_str(), wstr.size(), nullptr, 0, nullptr, nullptr);
char* buffer = new char[nLen + 1];
WideCharToMultiByte(CP_ACP, 0, wstr.c_str(), wstr.size(), buffer, nLen, nullptr, nullptr);
buffer[nLen] = '\0'; //字符串断尾
string str = buffer; //赋值
delete[] buffer; //删除缓冲区
return str;
// return "";
}
//----------------------------------------------------------------------------
// 解压
void Lib_bit7z::extract(const QString &sZip, const QString &sDir)
{
m_nTotalSize = 0;
wstring wZip = stringToWstring_WindowApi(sZip.toLocal8Bit().toStdString());
wstring wDir = stringToWstring_WindowApi(sDir.toLocal8Bit().toStdString());
try
{
qDebug()<<QString::fromStdWString(lib_path);
qDebug()<<QFileInfo::exists(QString::fromStdWString(lib_path));
qDebug()<<"[wZip] : "<<QString::fromStdWString(wZip);
qDebug()<<"[wDir] : "<<QString::fromStdWString(wDir);
Bit7zLibrary lib(lib_path);
BitExtractor extractor(lib, BitFormat::Auto);
ProgressCallback pc = std::bind(&Lib_bit7z::callbackProcess, this, std::placeholders::_1);
TotalCallback tc = std::bind(&Lib_bit7z::callbackTotal, this, std::placeholders::_1);
FileCallback fc = std::bind(&Lib_bit7z::callbackFile, this, std::placeholders::_1);
if(passWord.trimmed()!="")
{
wstring wPassWord=stringToWstring_WindowApi(passWord.toLocal8Bit().toStdString());
extractor.setPassword(wPassWord);
}
extractor.setProgressCallback(pc);
extractor.setTotalCallback(tc);
extractor.setFileCallback(fc);
extractor.extract(wZip, wDir);
}
catch (const BitException& ex)
{
qDebug()<<"extract ---> "<<ex.what();
emit MessAgeError(QString::fromStdString(ex.what()));
return;
}
}
void Lib_bit7z::compress(const QString &sDir, const QString &sZip)
{
m_nTotalSize = 0;
wstring wDir = stringToWstring_WindowApi(sDir.toLocal8Bit().toStdString());
wstring wZip = stringToWstring_WindowApi(sZip.toLocal8Bit().toStdString());
try
{
Bit7zLibrary lib(lib_path);
BitCompressor compressor(lib, BitFormat::SevenZip);
ProgressCallback pc = std::bind(&Lib_bit7z::callbackProcess, this, std::placeholders::_1);
TotalCallback tc = std::bind(&Lib_bit7z::callbackTotal, this, std::placeholders::_1);
FileCallback fc = std::bind(&Lib_bit7z::callbackFile, this, std::placeholders::_1);
if(passWord.trimmed()!="")
{
wstring wPassWord=stringToWstring_WindowApi(passWord.toLocal8Bit().toStdString());
compressor.setPassword(wPassWord);
}
compressor.setProgressCallback(pc);
compressor.setTotalCallback(tc);
compressor.setFileCallback(fc);
QFile::remove(sZip);
compressor.compressDirectory(wDir, wZip); //compressing a directory
}
catch (const BitException& ex)
{
qDebug()<<"extract ---> "<<ex.what();
emit MessAgeError(QString::fromStdString(ex.what()));
}
}
内容扩展
预览内容时获取文件修改时间
宏定义
//FILETIME 时间有效性判断
#define ISTIME(time) ((time.dwLowDateTime==0&& time.dwHighDateTime==0)?FALSE:TRUE)
#define FILETIME_ISVALID(lastcreate,lastwrite,lastaccess) (ISTIME(lastaccess)?lastaccess:(ISTIME(lastwrite)?lastwrite:lastcreate))
调用：
//items[i] 为BitArchiveItem类型
FILETIME TIME=FILETIME_ISVALID((items[i].getProperty(BitProperty::CTime).isFiletime()?items[i].getProperty(BitProperty::CTime).getFiletime():FILETIME()),
(items[i].getProperty(BitProperty::ATime).isFiletime()?items[i].getProperty(BitProperty::ATime).getFiletime():FILETIME()),
(items[i].getProperty(BitProperty::MTime).isFiletime()?items[i].getProperty(BitProperty::MTime).getFiletime():FILETIME()));
预览内容时获取文件大小
宏定义
#define KB (1024.0)
#define MB (1048576.0)
#define GB (1073741824.0)
#define TB (1099511627776.0)
调用：
///获取文件大小
static QString Getsize(LONGLONG _size)
{
if(_size>TB)
return QString("%1 TB").arg(QString::number(_size/TB,'f',2));
if(_size>GB)
return QString("%1 GB").arg(QString::number(_size/GB,'f',2));
if(_size>MB)
return QString("%1 MB").arg(QString::number(_size/MB,'f',2));
if(_size>KB)
return QString("%1 KB").arg(QString::number(_size/KB,'f',2));
else
return QString("%1 B").arg(QString::number(_size,'f',2));
}